package app

import (
	"bytes"
	"context"
	"encoding/base64"
	"encoding/json"
	"errors"
	"net/http"
	"net/url"
	"regexp"
	"strconv"
	"strings"
	"time"

	"github.com/jackc/pgx/v5"
	"github.com/jackc/pgx/v5/pgtype"
	"github.com/jackc/pgx/v5/pgxpool"
	"github.com/sergi/go-diff/diffmatchpatch"
	"github.com/yuin/goldmark"
	"github.com/yuin/goldmark/extension"
	goldhtml "github.com/yuin/goldmark/renderer/html"
	"golang.org/x/net/html"
	"golang.org/x/net/html/atom"

	"github.com/geo-platform/tenant-api/internal/shared/auth"
	sharedcache "github.com/geo-platform/tenant-api/internal/shared/cache"
	sharedcompliance "github.com/geo-platform/tenant-api/internal/shared/compliance"
	"github.com/geo-platform/tenant-api/internal/shared/config"
	"github.com/geo-platform/tenant-api/internal/shared/objectstorage"
	"github.com/geo-platform/tenant-api/internal/shared/publicasset"
	"github.com/geo-platform/tenant-api/internal/shared/response"
	tenantcompliance "github.com/geo-platform/tenant-api/internal/tenant/compliance"
	"github.com/geo-platform/tenant-api/internal/tenant/repository"
)

type EnterpriseSiteService struct {
	pool       *pgxpool.Pool
	cfg        config.Provider
	httpClient *http.Client
	cache      sharedcache.Cache
	compliance *tenantcompliance.Service
	storage    objectstorage.Client
}

func NewEnterpriseSiteService(pool *pgxpool.Pool, cfg config.Provider) *EnterpriseSiteService {
	return &EnterpriseSiteService{
		pool: pool,
		cfg:  cfg,
		httpClient: &http.Client{
			Timeout: 25 * time.Second,
		},
		compliance: tenantcompliance.NewService(pool, cfg, nil),
	}
}

func (s *EnterpriseSiteService) WithCache(c sharedcache.Cache) *EnterpriseSiteService {
	s.cache = c
	return s
}

func (s *EnterpriseSiteService) WithObjectStorage(storage objectstorage.Client) *EnterpriseSiteService {
	s.storage = storage
	return s
}

type EnterpriseSiteConnectionResponse struct {
	ID            int64                              `json:"id"`
	Name          string                             `json:"name"`
	SiteURL       string                             `json:"site_url"`
	CMSType       string                             `json:"cms_type"`
	AuthType      string                             `json:"auth_type"`
	AppID         string                             `json:"appid"`
	DefaultAcode  *string                            `json:"default_acode"`
	DefaultMcode  *string                            `json:"default_mcode"`
	DefaultScode  *string                            `json:"default_scode"`
	Status        string                             `json:"status"`
	PluginVersion *string                            `json:"plugin_version"`
	SiteName      *string                            `json:"site_name"`
	LastPingAt    *time.Time                         `json:"last_ping_at"`
	LastSyncAt    *time.Time                         `json:"last_sync_at"`
	LastPublishAt *time.Time                         `json:"last_publish_at"`
	LastError     *string                            `json:"last_error"`
	CategoryCount int                                `json:"category_count"`
	LatestRecord  *EnterpriseSiteLatestPublishRecord `json:"latest_record,omitempty"`
	CreatedAt     time.Time                          `json:"created_at"`
	UpdatedAt     time.Time                          `json:"updated_at"`
}

type EnterpriseSiteLatestPublishRecord struct {
	ID                 int64      `json:"id"`
	ArticleID          int64      `json:"article_id"`
	ArticleTitle       *string    `json:"article_title"`
	Status             string     `json:"status"`
	ExternalArticleID  *string    `json:"external_article_id"`
	ExternalArticleURL *string    `json:"external_article_url"`
	ErrorMessage       *string    `json:"error_message"`
	PublishedAt        *time.Time `json:"published_at"`
	CreatedAt          time.Time  `json:"created_at"`
	UpdatedAt          time.Time  `json:"updated_at"`
}

type EnterpriseSiteCategoryResponse struct {
	ID             int64          `json:"id"`
	RemoteID       string         `json:"remote_id"`
	ParentRemoteID *string        `json:"parent_remote_id"`
	Name           string         `json:"name"`
	Slug           *string        `json:"slug"`
	Raw            map[string]any `json:"raw,omitempty"`
	SyncedAt       time.Time      `json:"synced_at"`
}

type EnterpriseSiteCategoryItem struct {
	RemoteID       string
	ParentRemoteID *string
	Name           string
	Slug           *string
	Raw            map[string]any
}

type EnterpriseSiteCapability struct {
	CMSType       string  `json:"cms_type"`
	PluginVersion *string `json:"plugin_version"`
	SiteURL       string  `json:"site_url"`
	SiteName      *string `json:"site_name"`
	APIAuth       bool    `json:"api_auth"`
}

type CreateEnterpriseSiteConnectionRequest struct {
	Name         string  `json:"name"`
	SiteURL      string  `json:"site_url" binding:"required"`
	CMSType      string  `json:"cms_type" binding:"required"`
	AppID        string  `json:"appid" binding:"required"`
	Secret       string  `json:"secret" binding:"required"`
	DefaultAcode *string `json:"default_acode"`
	DefaultMcode *string `json:"default_mcode"`
	DefaultScode *string `json:"default_scode"`
}

type UpdateEnterpriseSiteConnectionRequest struct {
	Name         *string `json:"name"`
	SiteURL      *string `json:"site_url"`
	AppID        *string `json:"appid"`
	Secret       *string `json:"secret"`
	DefaultAcode *string `json:"default_acode"`
	DefaultMcode *string `json:"default_mcode"`
	DefaultScode *string `json:"default_scode"`
	Status       *string `json:"status"`
}

type PublishEnterpriseSiteArticleRequest struct {
	ArticleID         int64   `json:"article_id" binding:"required"`
	CategoryID        string  `json:"category_id"`
	PublishType       string  `json:"publish_type"`
	Author            *string `json:"author"`
	Source            *string `json:"source"`
	ArticleVersionID  *int64  `json:"article_version_id,omitempty"`
	AckRecordID       *int64  `json:"ack_record_id,omitempty"`
	CoverAssetURL     *string `json:"cover_asset_url,omitempty"`
	CoverImageAssetID *int64  `json:"cover_image_asset_id,omitempty"`
}

type EnterpriseSitePublishResponse struct {
	PublishBatchID     int64      `json:"publish_batch_id"`
	PublishRecordID    int64      `json:"publish_record_id"`
	ConnectionID       int64      `json:"connection_id"`
	ArticleID          int64      `json:"article_id"`
	Status             string     `json:"status"`
	ExternalArticleID  *string    `json:"external_article_id"`
	ExternalArticleURL *string    `json:"external_article_url"`
	ErrorMessage       *string    `json:"error_message"`
	PublishedAt        *time.Time `json:"published_at"`
}

type enterpriseSiteConnectionRecord struct {
	ID                   int64
	TenantID             int64
	WorkspaceID          int64
	Name                 string
	SiteURL              string
	CMSType              string
	AuthType             string
	AppID                string
	CredentialCiphertext string
	DefaultAcode         *string
	DefaultMcode         *string
	DefaultScode         *string
	Status               string
	PluginVersion        *string
	SiteName             *string
	LastPingAt           *time.Time
	LastSyncAt           *time.Time
	LastPublishAt        *time.Time
	LastError            *string
	CategoryCount        int
	CreatedAt            time.Time
	UpdatedAt            time.Time
}

type enterpriseSitePublishArticle struct {
	ID                int64
	BrandID           int64
	CurrentVersionID  *int64
	Title             string
	HTMLContent       string
	MarkdownContent   string
	WordCount         int
	SourceLabel       *string
	CoverAssetURL     *string
	CoverImageAssetID *int64
}

var enterpriseSiteSummaryTagPattern = regexp.MustCompile(`(?is)<[^>]+>`)
var enterpriseSiteImageAttrPattern = regexp.MustCompile(`(?i)(<img\b[^>]*\s(?:src|data-src|_src)=["'])([^"']+)(["'])`)
var enterpriseSiteMarkdownHeadingPattern = regexp.MustCompile(`^#{1,2}\s+(.+?)\s*#*\s*$`)
var enterpriseSiteMalformedEditorImagePattern = regexp.MustCompile(`(?i)(<p\b[^<>]*?)\s+(<img\b)`)

func (s *EnterpriseSiteService) List(ctx context.Context) ([]EnterpriseSiteConnectionResponse, error) {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	if actor.TenantID == 0 || workspaceID == 0 {
		return nil, response.ErrUnauthorized(40132, "workspace_scope_missing", "workspace context is required")
	}

	rows, err := s.pool.Query(ctx, `
		WITH category_counts AS (
			SELECT connection_id, COUNT(*)::int AS category_count
			FROM enterprise_site_categories
			WHERE tenant_id = $1 AND workspace_id = $2
			GROUP BY connection_id
		),
		latest_records AS (
			SELECT DISTINCT ON (pr.target_connection_id)
				pr.target_connection_id,
				pr.id,
				pr.article_id,
				COALESCE(av.title, NULLIF(a.wizard_state_json ->> 'title', '')) AS article_title,
				pr.status,
				pr.external_article_id,
				pr.external_article_url,
				pr.error_message,
				pr.published_at,
				pr.created_at,
				pr.updated_at
			FROM publish_records pr
			LEFT JOIN articles a ON a.id = pr.article_id AND a.tenant_id = pr.tenant_id
			LEFT JOIN article_versions av ON av.id = a.current_version_id
			WHERE pr.tenant_id = $1
			  AND pr.target_type = 'enterprise_site'
			  AND pr.target_connection_id IS NOT NULL
			ORDER BY pr.target_connection_id, pr.created_at DESC, pr.id DESC
		)
		SELECT
			c.id,
			c.tenant_id,
			c.workspace_id,
			c.name,
			c.site_url,
			c.cms_type,
			c.auth_type,
			c.appid,
			c.credential_ciphertext,
			c.default_acode,
			c.default_mcode,
			c.default_scode,
			c.status,
			c.plugin_version,
			c.site_name,
			c.last_ping_at,
			c.last_sync_at,
			c.last_publish_at,
			c.last_error,
			COALESCE(cc.category_count, 0),
			c.created_at,
			c.updated_at,
			lr.id,
			lr.article_id,
			lr.article_title,
			lr.status,
			lr.external_article_id,
			lr.external_article_url,
			lr.error_message,
			lr.published_at,
			lr.created_at,
			lr.updated_at
		FROM enterprise_site_connections c
		LEFT JOIN category_counts cc ON cc.connection_id = c.id
		LEFT JOIN latest_records lr ON lr.target_connection_id = c.id
		WHERE c.tenant_id = $1
		  AND c.workspace_id = $2
		  AND c.deleted_at IS NULL
		ORDER BY c.created_at DESC, c.id DESC
	`, actor.TenantID, workspaceID)
	if err != nil {
		return nil, response.ErrInternal(50220, "enterprise_site_query_failed", "failed to list enterprise sites")
	}
	defer rows.Close()

	items := make([]EnterpriseSiteConnectionResponse, 0)
	for rows.Next() {
		record, latest, scanErr := scanEnterpriseSiteConnectionRow(rows)
		if scanErr != nil {
			return nil, response.ErrInternal(50220, "enterprise_site_scan_failed", "failed to parse enterprise site")
		}
		item := enterpriseSiteConnectionResponse(record)
		item.LatestRecord = latest
		enterpriseSiteNormalizeLegacyPublishErrorState(&item)
		items = append(items, item)
	}
	if err := rows.Err(); err != nil {
		return nil, response.ErrInternal(50220, "enterprise_site_scan_failed", "failed to iterate enterprise sites")
	}
	return items, nil
}

func (s *EnterpriseSiteService) Create(ctx context.Context, req CreateEnterpriseSiteConnectionRequest) (*EnterpriseSiteConnectionResponse, error) {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	if actor.TenantID == 0 || workspaceID == 0 || actor.UserID == 0 {
		return nil, response.ErrUnauthorized(40132, "workspace_scope_missing", "workspace context is required")
	}

	normalized, err := normalizeCreateEnterpriseSiteConnectionRequest(req)
	if err != nil {
		return nil, err
	}
	ciphertext, err := encryptEnterpriseSiteCredential(normalized.Secret, s.credentialKeyMaterial())
	if err != nil {
		return nil, response.ErrInternal(50221, "enterprise_site_secret_encrypt_failed", "failed to store enterprise site credential")
	}

	var id int64
	if err := s.pool.QueryRow(ctx, `
		INSERT INTO enterprise_site_connections (
			tenant_id, workspace_id, created_by_user_id, name, site_url, cms_type, auth_type,
			appid, credential_ciphertext, default_acode, default_mcode, default_scode, status
		)
		VALUES ($1, $2, $3, $4, $5, $6, 'native_api', $7, $8, $9, $10, $11, 'draft')
		RETURNING id
	`,
		actor.TenantID,
		workspaceID,
		actor.UserID,
		normalized.Name,
		normalized.SiteURL,
		normalized.CMSType,
		normalized.AppID,
		ciphertext,
		normalized.DefaultAcode,
		normalized.DefaultMcode,
		normalized.DefaultScode,
	).Scan(&id); err != nil {
		return nil, response.ErrConflict(40941, "enterprise_site_already_exists", "enterprise site connection already exists")
	}

	return s.Get(ctx, id)
}

func (s *EnterpriseSiteService) Update(ctx context.Context, id int64, req UpdateEnterpriseSiteConnectionRequest) (*EnterpriseSiteConnectionResponse, error) {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	if actor.TenantID == 0 || workspaceID == 0 {
		return nil, response.ErrUnauthorized(40132, "workspace_scope_missing", "workspace context is required")
	}

	current, err := s.loadConnection(ctx, actor.TenantID, workspaceID, id)
	if err != nil {
		return nil, err
	}
	if current.Status == "disabled" && req.Status == nil {
		return nil, response.ErrConflict(40942, "enterprise_site_disabled", "enterprise site connection is disabled")
	}

	next := *current
	if req.Name != nil {
		name := strings.TrimSpace(*req.Name)
		if name == "" {
			return nil, response.ErrBadRequest(40041, "enterprise_site_name_required", "site name is required")
		}
		next.Name = name
	}
	if req.SiteURL != nil {
		siteURL, normalizeErr := normalizeEnterpriseSiteURL(*req.SiteURL)
		if normalizeErr != nil {
			return nil, normalizeErr
		}
		next.SiteURL = siteURL
	}
	if req.AppID != nil {
		appid := strings.TrimSpace(*req.AppID)
		if appid == "" {
			return nil, response.ErrBadRequest(40042, "enterprise_site_appid_required", "appid is required")
		}
		next.AppID = appid
	}
	if req.DefaultAcode != nil {
		next.DefaultAcode = normalizeOptionalEnterpriseCode(*req.DefaultAcode)
	}
	if req.DefaultMcode != nil {
		next.DefaultMcode = normalizeOptionalEnterpriseCode(*req.DefaultMcode)
	}
	if req.DefaultScode != nil {
		next.DefaultScode = normalizeOptionalEnterpriseCode(*req.DefaultScode)
	}
	if req.Status != nil {
		status := strings.TrimSpace(*req.Status)
		if !validEnterpriseSiteStatus(status) {
			return nil, response.ErrBadRequest(40043, "invalid_enterprise_site_status", "status is invalid")
		}
		next.Status = status
	}
	ciphertext := next.CredentialCiphertext
	if req.Secret != nil && strings.TrimSpace(*req.Secret) != "" {
		encrypted, encryptErr := encryptEnterpriseSiteCredential(*req.Secret, s.credentialKeyMaterial())
		if encryptErr != nil {
			return nil, response.ErrInternal(50221, "enterprise_site_secret_encrypt_failed", "failed to store enterprise site credential")
		}
		ciphertext = encrypted
	}

	if _, err := s.pool.Exec(ctx, `
		UPDATE enterprise_site_connections
		SET name = $1,
		    site_url = $2,
		    appid = $3,
		    credential_ciphertext = $4,
		    default_acode = $5,
		    default_mcode = $6,
		    default_scode = $7,
		    status = $8,
		    last_error = CASE WHEN $8 IN ('draft', 'connected') THEN NULL ELSE last_error END,
		    updated_at = NOW()
		WHERE id = $9
		  AND tenant_id = $10
		  AND workspace_id = $11
		  AND deleted_at IS NULL
	`,
		next.Name,
		next.SiteURL,
		next.AppID,
		ciphertext,
		next.DefaultAcode,
		next.DefaultMcode,
		next.DefaultScode,
		next.Status,
		id,
		actor.TenantID,
		workspaceID,
	); err != nil {
		return nil, response.ErrConflict(40941, "enterprise_site_already_exists", "enterprise site connection already exists")
	}

	return s.Get(ctx, id)
}

func (s *EnterpriseSiteService) Get(ctx context.Context, id int64) (*EnterpriseSiteConnectionResponse, error) {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	record, err := s.loadConnection(ctx, actor.TenantID, workspaceID, id)
	if err != nil {
		return nil, err
	}
	item := enterpriseSiteConnectionResponse(record)
	return &item, nil
}

func (s *EnterpriseSiteService) Delete(ctx context.Context, id int64) error {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	command, err := s.pool.Exec(ctx, `
		UPDATE enterprise_site_connections
		SET deleted_at = NOW(),
		    updated_at = NOW()
		WHERE id = $1
		  AND tenant_id = $2
		  AND workspace_id = $3
		  AND deleted_at IS NULL
	`, id, actor.TenantID, workspaceID)
	if err != nil {
		return response.ErrInternal(50222, "enterprise_site_delete_failed", "failed to delete enterprise site")
	}
	if command.RowsAffected() == 0 {
		return response.ErrNotFound(40441, "enterprise_site_not_found", "enterprise site connection not found")
	}
	return nil
}

func (s *EnterpriseSiteService) Ping(ctx context.Context, id int64) (*EnterpriseSiteCapability, error) {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	connection, err := s.loadConnection(ctx, actor.TenantID, workspaceID, id)
	if err != nil {
		return nil, err
	}
	credential, err := s.connectionCredential(connection)
	if err != nil {
		return nil, err
	}
	publisher := s.publisherFor(connection.CMSType)
	capability, raw, err := publisher.Ping(ctx, credential)
	if err != nil {
		_ = s.markConnectionError(ctx, connection.ID, actor.TenantID, workspaceID, err)
		return nil, response.ErrBadRequest(40044, "enterprise_site_ping_failed", sanitizeEnterpriseSiteError(err))
	}
	pluginVersion := capability.PluginVersion
	siteName := capability.SiteName
	if _, err := s.pool.Exec(ctx, `
		UPDATE enterprise_site_connections
		SET status = 'connected',
		    plugin_version = $1,
		    site_name = $2,
		    last_ping_at = NOW(),
		    last_error = NULL,
		    updated_at = NOW()
		WHERE id = $3 AND tenant_id = $4 AND workspace_id = $5 AND deleted_at IS NULL
	`, pluginVersion, siteName, connection.ID, actor.TenantID, workspaceID); err != nil {
		return nil, response.ErrInternal(50223, "enterprise_site_ping_update_failed", "failed to update enterprise site ping")
	}
	_ = raw
	return capability, nil
}

func (s *EnterpriseSiteService) SyncCategories(ctx context.Context, id int64) ([]EnterpriseSiteCategoryResponse, error) {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	connection, err := s.loadConnection(ctx, actor.TenantID, workspaceID, id)
	if err != nil {
		return nil, err
	}
	credential, err := s.connectionCredential(connection)
	if err != nil {
		return nil, err
	}

	items, _, err := s.publisherFor(connection.CMSType).Categories(ctx, credential)
	if err != nil {
		return nil, response.ErrBadRequest(40045, "enterprise_site_category_sync_failed", sanitizeEnterpriseSiteError(err))
	}
	if len(items) == 0 {
		return nil, response.ErrBadRequest(40046, "enterprise_site_categories_empty", "CMS did not return any publishable categories")
	}

	tx, err := s.pool.Begin(ctx)
	if err != nil {
		return nil, response.ErrInternal(50224, "enterprise_site_category_sync_begin_failed", "failed to sync enterprise site categories")
	}
	defer tx.Rollback(ctx)

	if _, err := tx.Exec(ctx, `
		DELETE FROM enterprise_site_categories
		WHERE tenant_id = $1 AND workspace_id = $2 AND connection_id = $3
	`, actor.TenantID, workspaceID, connection.ID); err != nil {
		return nil, response.ErrInternal(50224, "enterprise_site_category_clear_failed", "failed to sync enterprise site categories")
	}

	for _, item := range items {
		rawJSON, marshalErr := json.Marshal(item.Raw)
		if marshalErr != nil {
			return nil, response.ErrInternal(50224, "enterprise_site_category_payload_failed", "failed to sync enterprise site categories")
		}
		if _, err := tx.Exec(ctx, `
			INSERT INTO enterprise_site_categories (
				tenant_id, workspace_id, connection_id, remote_id, parent_remote_id, name, slug, raw_payload_json
			)
			VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
		`,
			actor.TenantID,
			workspaceID,
			connection.ID,
			item.RemoteID,
			item.ParentRemoteID,
			item.Name,
			item.Slug,
			rawJSON,
		); err != nil {
			return nil, response.ErrInternal(50224, "enterprise_site_category_insert_failed", "failed to sync enterprise site categories")
		}
	}

	if _, err := tx.Exec(ctx, `
		UPDATE enterprise_site_connections
		SET status = 'connected',
		    last_sync_at = NOW(),
		    last_error = NULL,
		    updated_at = NOW()
		WHERE id = $1 AND tenant_id = $2 AND workspace_id = $3 AND deleted_at IS NULL
	`, connection.ID, actor.TenantID, workspaceID); err != nil {
		return nil, response.ErrInternal(50224, "enterprise_site_sync_update_failed", "failed to update enterprise site sync state")
	}

	if err := tx.Commit(ctx); err != nil {
		return nil, response.ErrInternal(50224, "enterprise_site_category_sync_commit_failed", "failed to sync enterprise site categories")
	}
	return s.Categories(ctx, id)
}

func (s *EnterpriseSiteService) Categories(ctx context.Context, id int64) ([]EnterpriseSiteCategoryResponse, error) {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	if _, err := s.loadConnection(ctx, actor.TenantID, workspaceID, id); err != nil {
		return nil, err
	}
	rows, err := s.pool.Query(ctx, `
		SELECT id, remote_id, parent_remote_id, name, slug, raw_payload_json, synced_at
		FROM enterprise_site_categories
		WHERE tenant_id = $1
		  AND workspace_id = $2
		  AND connection_id = $3
		ORDER BY COALESCE(parent_remote_id, ''), name ASC, id ASC
	`, actor.TenantID, workspaceID, id)
	if err != nil {
		return nil, response.ErrInternal(50225, "enterprise_site_category_query_failed", "failed to list enterprise site categories")
	}
	defer rows.Close()

	items := make([]EnterpriseSiteCategoryResponse, 0)
	for rows.Next() {
		var item EnterpriseSiteCategoryResponse
		var raw []byte
		if err := rows.Scan(&item.ID, &item.RemoteID, &item.ParentRemoteID, &item.Name, &item.Slug, &raw, &item.SyncedAt); err != nil {
			return nil, response.ErrInternal(50225, "enterprise_site_category_scan_failed", "failed to parse enterprise site category")
		}
		if len(raw) > 0 {
			item.Raw = map[string]any{}
			_ = json.Unmarshal(raw, &item.Raw)
		}
		items = append(items, item)
	}
	if err := rows.Err(); err != nil {
		return nil, response.ErrInternal(50225, "enterprise_site_category_scan_failed", "failed to iterate enterprise site categories")
	}
	return items, nil
}

func (s *EnterpriseSiteService) PublishArticle(ctx context.Context, connectionID int64, req PublishEnterpriseSiteArticleRequest) (*EnterpriseSitePublishResponse, error) {
	actor := auth.MustActor(ctx)
	workspaceID := auth.CurrentWorkspaceID(ctx)
	brandID, err := requireCurrentBrandID(ctx)
	if err != nil {
		return nil, err
	}
	if actor.TenantID == 0 || workspaceID == 0 || actor.UserID == 0 {
		return nil, response.ErrUnauthorized(40132, "workspace_scope_missing", "workspace context is required")
	}

	connection, err := s.loadConnection(ctx, actor.TenantID, workspaceID, connectionID)
	if err != nil {
		return nil, err
	}
	if connection.Status == "disabled" {
		return nil, response.ErrConflict(40942, "enterprise_site_disabled", "enterprise site connection is disabled")
	}

	article, err := s.loadPublishArticle(ctx, actor.TenantID, brandID, req.ArticleID, req.ArticleVersionID)
	if err != nil {
		return nil, err
	}
	categoryID := strings.TrimSpace(req.CategoryID)
	if categoryID == "" {
		categoryID = strings.TrimSpace(enterpriseSiteStringPointerValue(connection.DefaultScode))
	}
	if categoryID == "" {
		return nil, response.ErrBadRequest(40047, "enterprise_site_category_required", "category_id is required")
	}
	if err := s.ensureCategoryExists(ctx, actor.TenantID, workspaceID, connection.ID, categoryID); err != nil {
		return nil, err
	}

	contentHTML := enterpriseSiteNormalizeStoredContent(article.HTMLContent)
	markdownContent := enterpriseSiteNormalizeStoredContent(article.MarkdownContent)
	if contentHTML != "" && !enterpriseSiteContentLooksLikeHTML(contentHTML) {
		if markdownContent == "" {
			markdownContent = contentHTML
		}
		contentHTML = ""
	}
	markdownContent = enterpriseSiteStripLeadingTitleHeadingMarkdown(markdownContent, article.Title)
	if contentHTML == "" {
		contentHTML, err = markdownToEnterpriseSiteHTML(markdownContent)
		if err != nil {
			return nil, response.ErrInternal(50226, "enterprise_site_markdown_render_failed", "failed to render article content")
		}
	}
	contentHTML = enterpriseSiteStripLeadingTitleHeadingHTML(contentHTML, article.Title)
	if strings.TrimSpace(contentHTML) == "" {
		return nil, response.ErrBadRequest(40048, "enterprise_site_article_empty", "article content is empty")
	}

	effectiveVersionID, err := s.compliance.ResolvePublishableVersion(ctx, actor.TenantID, article.ID, article.CurrentVersionID)
	if err != nil {
		return nil, err
	}
	gate, err := s.compliance.GateForPublish(ctx, tenantcompliance.GateForPublishRequest{
		TenantID:         actor.TenantID,
		ArticleID:        article.ID,
		ArticleVersionID: effectiveVersionID,
		ActorID:          actor.UserID,
		TargetPlatforms:  []string{connection.CMSType},
		AckRecordID:      req.AckRecordID,
		TriggerSource:    "publish_gate",
	})
	if err != nil {
		return nil, compliancePublishError(err, gate)
	}
	if gate != nil {
		switch gate.Decision {
		case sharedcompliance.GateDecisionBlock:
			return nil, compliancePublishError(response.ErrConflict(41001, "compliance_blocked", "content compliance blocked this publish request"), gate)
		case sharedcompliance.GateDecisionNeedsAck:
			return nil, compliancePublishError(response.ErrConflict(41002, "compliance_needs_ack", "content compliance requires acknowledgement before publishing"), gate)
		}
	}

	publishType := normalizeEnterprisePublishType(req.PublishType)
	coverURLInput, coverImageAssetID := enterpriseSitePublishCoverInput(article, req)
	contentHTML, coverURL := s.prepareEnterpriseSitePublishAssets(
		ctx,
		actor.TenantID,
		contentHTML,
		coverURLInput,
		coverImageAssetID,
	)
	requestPayload := cmsPublishRequest{
		ArticleID:   article.ID,
		Title:       article.Title,
		ContentHTML: contentHTML,
		CategoryID:  categoryID,
		Description: enterpriseSiteDescription(contentHTML, markdownContent),
		Author:      strings.TrimSpace(enterpriseSiteStringPointerValue(req.Author)),
		Source:      strings.TrimSpace(enterpriseSiteStringPointerValue(req.Source)),
		CoverURL:    coverURL,
		PublishType: publishType,
	}
	if requestPayload.Author == "" {
		requestPayload.Author = "Geo SaaS"
	}
	if requestPayload.Source == "" {
		requestPayload.Source = "Geo SaaS"
	}

	credential, err := s.connectionCredential(connection)
	if err != nil {
		return nil, err
	}
	requestJSON, err := json.Marshal(map[string]any{
		"connection_id":                connection.ID,
		"cms_type":                     connection.CMSType,
		"category_id":                  categoryID,
		"publish_type":                 publishType,
		"article_id":                   article.ID,
		"article_version_id":           effectiveVersionID,
		"requested_article_version_id": req.ArticleVersionID,
		"cover_image_asset_id":         coverImageAssetID,
	})
	if err != nil {
		return nil, response.ErrInternal(50227, "enterprise_site_publish_payload_failed", "failed to create publish record")
	}

	publishBatchID, publishRecordID, err := s.createEnterprisePublishRecord(ctx, actor, article, connection, publishType, requestJSON, effectiveVersionID, req.AckRecordID, gate)
	if err != nil {
		return nil, err
	}

	result, raw, publishErr := s.publisherFor(connection.CMSType).Publish(ctx, credential, requestPayload)
	if publishErr != nil {
		errorMessage := sanitizeEnterpriseSiteError(publishErr)
		if updateErr := s.finishEnterprisePublishRecord(ctx, actor.TenantID, workspaceID, publishBatchID, publishRecordID, article.ID, connection.ID, "failed", nil, nil, nil, nil, &errorMessage); updateErr != nil {
			return nil, updateErr
		}
		return &EnterpriseSitePublishResponse{
			PublishBatchID:  publishBatchID,
			PublishRecordID: publishRecordID,
			ConnectionID:    connection.ID,
			ArticleID:       article.ID,
			Status:          "failed",
			ErrorMessage:    &errorMessage,
		}, nil
	}

	rawJSON, err := json.Marshal(raw)
	if err != nil {
		return nil, response.ErrInternal(50228, "enterprise_site_publish_response_failed", "failed to persist CMS response")
	}
	externalID := normalizeStringPointer(&result.RemoteID)
	externalURL := normalizeStringPointer(&result.URL)
	publishedAt := time.Now().UTC()
	status := "success"
	if publishType == "draft" {
		status = "success"
	}
	if err := s.finishEnterprisePublishRecord(ctx, actor.TenantID, workspaceID, publishBatchID, publishRecordID, article.ID, connection.ID, status, externalID, externalURL, &rawJSON, &publishedAt, nil); err != nil {
		return nil, err
	}

	invalidateArticleCaches(ctx, s.cache, actor.TenantID, &article.ID)
	return &EnterpriseSitePublishResponse{
		PublishBatchID:     publishBatchID,
		PublishRecordID:    publishRecordID,
		ConnectionID:       connection.ID,
		ArticleID:          article.ID,
		Status:             status,
		ExternalArticleID:  externalID,
		ExternalArticleURL: externalURL,
		PublishedAt:        &publishedAt,
	}, nil
}

func (s *EnterpriseSiteService) createEnterprisePublishRecord(
	ctx context.Context,
	actor auth.Actor,
	article enterpriseSitePublishArticle,
	connection *enterpriseSiteConnectionRecord,
	publishType string,
	requestJSON []byte,
	articleVersionID int64,
	ackRecordID *int64,
	gate *tenantcompliance.GateOutcome,
) (int64, int64, error) {
	tx, err := s.pool.Begin(ctx)
	if err != nil {
		return 0, 0, response.ErrInternal(50227, "enterprise_site_publish_begin_failed", "failed to create publish record")
	}
	defer tx.Rollback(ctx)

	var publishBatchID int64
	if err := tx.QueryRow(ctx, `
		INSERT INTO publish_batches (tenant_id, article_id, initiator_user_id, status, publish_type, cover_asset_url)
		VALUES ($1, $2, $3, 'publishing', $4, $5)
		RETURNING id
	`, actor.TenantID, article.ID, actor.UserID, publishType, normalizeStringPointer(article.CoverAssetURL)).Scan(&publishBatchID); err != nil {
		return 0, 0, response.ErrInternal(50227, "enterprise_site_publish_batch_failed", "failed to create publish record")
	}

	var publishRecordID int64
	if err := tx.QueryRow(ctx, `
		INSERT INTO publish_records (
			tenant_id, publish_batch_id, article_id, platform_account_id, platform_id, status,
			request_payload_json, target_type, target_connection_id
		)
		VALUES ($1, $2, $3, NULL, $4, 'publishing', $5, 'enterprise_site', $6)
		RETURNING id
	`, actor.TenantID, publishBatchID, article.ID, connection.CMSType, requestJSON, connection.ID).Scan(&publishRecordID); err != nil {
		return 0, 0, response.ErrInternal(50227, "enterprise_site_publish_record_failed", "failed to create publish record")
	}

	if _, err := tx.Exec(ctx, `
		UPDATE articles
		SET publish_status = 'publishing', updated_at = NOW()
		WHERE id = $1 AND tenant_id = $2 AND deleted_at IS NULL
	`, article.ID, actor.TenantID); err != nil {
		return 0, 0, response.ErrInternal(50227, "enterprise_site_article_publish_status_failed", "failed to update article publish status")
	}

	if err := s.consumeEnterprisePublishAckTx(ctx, tx, ackRecordID, gate, actor.TenantID, article.ID, articleVersionID); err != nil {
		return 0, 0, err
	}

	if err := tx.Commit(ctx); err != nil {
		return 0, 0, response.ErrInternal(50227, "enterprise_site_publish_commit_failed", "failed to create publish record")
	}
	invalidateArticleCaches(ctx, s.cache, actor.TenantID, &article.ID)
	return publishBatchID, publishRecordID, nil
}

func (s *EnterpriseSiteService) consumeEnterprisePublishAckTx(
	ctx context.Context,
	tx pgx.Tx,
	ackRecordID *int64,
	gate *tenantcompliance.GateOutcome,
	tenantID int64,
	articleID int64,
	articleVersionID int64,
) error {
	if ackRecordID == nil {
		return nil
	}
	if gate == nil || gate.Result == nil {
		return response.ErrBadRequest(41003, "compliance_ack_mismatch", "ack record cannot be consumed without a matching compliance result")
	}
	consumed, err := s.compliance.ConsumeAckTx(ctx, tx, *ackRecordID, tenantcompliance.ConsumeAckQuery{
		TenantID:          tenantID,
		ArticleID:         articleID,
		ArticleVersionID:  articleVersionID,
		CheckRecordID:     gate.Result.RecordID,
		ContentHash:       gate.Result.ContentHash,
		PolicyFingerprint: gate.Result.PolicyFingerprint,
		ConsumedByJobID:   nil,
	})
	if err != nil {
		return response.ErrInternal(50227, "enterprise_site_publish_ack_failed", "failed to consume compliance acknowledgement")
	}
	if !consumed {
		return response.ErrBadRequest(41003, "compliance_ack_mismatch", "ack record is invalid or expired")
	}
	return nil
}

func (s *EnterpriseSiteService) finishEnterprisePublishRecord(
	ctx context.Context,
	tenantID int64,
	workspaceID int64,
	publishBatchID int64,
	publishRecordID int64,
	articleID int64,
	connectionID int64,
	status string,
	externalID *string,
	externalURL *string,
	responseJSON *[]byte,
	publishedAt *time.Time,
	errorMessage *string,
) error {
	tx, err := s.pool.Begin(ctx)
	if err != nil {
		return response.ErrInternal(50228, "enterprise_site_publish_finish_begin_failed", "failed to update publish record")
	}
	defer tx.Rollback(ctx)

	var responsePayload []byte
	if responseJSON != nil {
		responsePayload = *responseJSON
	}
	if _, err := tx.Exec(ctx, `
		UPDATE publish_records
		SET status = $1,
		    external_article_id = $2,
		    external_article_url = $3,
		    external_manage_url = $3,
		    response_payload_json = $4,
		    published_at = $5,
		    error_message = $6,
		    updated_at = NOW()
		WHERE id = $7 AND tenant_id = $8
	`, status, externalID, externalURL, nullableJSON(responsePayload), publishedAt, errorMessage, publishRecordID, tenantID); err != nil {
		return response.ErrInternal(50228, "enterprise_site_publish_record_update_failed", "failed to update publish record")
	}

	batchStatus, err := recalculatePublishBatchStatus(ctx, tx, publishBatchID)
	if err != nil {
		return err
	}
	if _, err := tx.Exec(ctx, `
		UPDATE publish_batches
		SET status = $1, updated_at = NOW()
		WHERE id = $2 AND tenant_id = $3
	`, batchStatus, publishBatchID, tenantID); err != nil {
		return response.ErrInternal(50228, "enterprise_site_publish_batch_update_failed", "failed to update publish batch")
	}

	articleStatus := publishBatchStatusToArticleStatus(batchStatus)
	if _, err := tx.Exec(ctx, `
		UPDATE articles
		SET publish_status = $1, updated_at = NOW()
		WHERE id = $2 AND tenant_id = $3 AND deleted_at IS NULL
	`, articleStatus, articleID, tenantID); err != nil {
		return response.ErrInternal(50228, "enterprise_site_article_publish_update_failed", "failed to update article publish status")
	}

	if status == "success" {
		if _, err := tx.Exec(ctx, `
			UPDATE enterprise_site_connections
			SET status = 'connected',
			    last_publish_at = NOW(),
			    last_error = NULL,
			    updated_at = NOW()
			WHERE id = $1 AND tenant_id = $2 AND workspace_id = $3 AND deleted_at IS NULL
		`, connectionID, tenantID, workspaceID); err != nil {
			return response.ErrInternal(50228, "enterprise_site_publish_connection_update_failed", "failed to update enterprise site")
		}
	}

	if err := tx.Commit(ctx); err != nil {
		return response.ErrInternal(50228, "enterprise_site_publish_finish_commit_failed", "failed to update publish record")
	}
	invalidateArticleCaches(ctx, s.cache, tenantID, &articleID)
	return nil
}

func (s *EnterpriseSiteService) loadPublishArticle(ctx context.Context, tenantID, brandID, articleID int64, requestedVersionID *int64) (enterpriseSitePublishArticle, error) {
	var article enterpriseSitePublishArticle
	var wizardStateJSON []byte
	if err := s.pool.QueryRow(ctx, `
		SELECT
			a.id,
			a.brand_id,
			a.current_version_id,
			COALESCE(av.title, NULLIF(a.wizard_state_json ->> 'title', ''), '未命名文章'),
			COALESCE(av.word_count, 0),
			av.source_label,
			a.wizard_state_json
		FROM articles a
		LEFT JOIN article_versions av ON av.id = a.current_version_id
		WHERE a.id = $1
		  AND a.tenant_id = $2
		  AND a.brand_id = $3
		  AND a.deleted_at IS NULL
		  AND a.generate_status = 'completed'
	`, articleID, tenantID, brandID).Scan(
		&article.ID,
		&article.BrandID,
		&article.CurrentVersionID,
		&article.Title,
		&article.WordCount,
		&article.SourceLabel,
		&wizardStateJSON,
	); err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return article, response.ErrNotFound(40411, "article_not_found", "article not found")
		}
		return article, response.ErrInternal(50229, "enterprise_site_article_lookup_failed", "failed to load article")
	}
	if err := s.populatePublishArticleContent(ctx, &article, wizardStateJSON, requestedVersionID); err != nil {
		return article, err
	}
	article.CoverAssetURL = resolveArticleCoverAssetURL(wizardStateJSON)
	article.CoverImageAssetID = resolveArticleCoverImageAssetID(wizardStateJSON)
	article.Title = strings.TrimSpace(article.Title)
	if article.Title == "" {
		article.Title = "未命名文章"
	}
	return article, nil
}

func (s *EnterpriseSiteService) populatePublishArticleContent(ctx context.Context, article *enterpriseSitePublishArticle, wizardStateJSON []byte, requestedVersionID *int64) error {
	if article == nil {
		return nil
	}

	if requestedVersionID != nil && *requestedVersionID > 0 {
		if err := s.loadPublishArticleVersionContent(ctx, article, *requestedVersionID, true); err != nil {
			return err
		}
		article.CurrentVersionID = requestedVersionID
		if enterpriseSitePublishArticleContentInvalid(article.HTMLContent, article.MarkdownContent) {
			if err := s.loadPublishArticleVersionSnapshotContent(ctx, article, *requestedVersionID, true); err != nil {
				return err
			}
		}
		if enterpriseSitePublishArticleContentInvalid(article.HTMLContent, article.MarkdownContent) {
			return s.populatePublishArticleWizardFallback(article, wizardStateJSON)
		}
		return nil
	}

	if article.CurrentVersionID != nil && *article.CurrentVersionID > 0 {
		if err := s.loadPublishArticleVersionContent(ctx, article, *article.CurrentVersionID, false); err != nil && !errors.Is(err, pgx.ErrNoRows) {
			return err
		}
	}
	if !enterpriseSitePublishArticleContentInvalid(article.HTMLContent, article.MarkdownContent) {
		return nil
	}

	if err := s.loadLatestPublishArticleVersionContent(ctx, article); err != nil && !errors.Is(err, pgx.ErrNoRows) {
		return err
	}
	if article.CurrentVersionID != nil && *article.CurrentVersionID > 0 && enterpriseSitePublishArticleContentInvalid(article.HTMLContent, article.MarkdownContent) {
		if err := s.loadPublishArticleVersionSnapshotContent(ctx, article, *article.CurrentVersionID, false); err != nil && !errors.Is(err, pgx.ErrNoRows) {
			return err
		}
	}
	return s.populatePublishArticleWizardFallback(article, wizardStateJSON)
}

func (s *EnterpriseSiteService) loadPublishArticleVersionContent(ctx context.Context, article *enterpriseSitePublishArticle, versionID int64, strict bool) error {
	content, err := repository.LoadArticleVersionContent(ctx, s.pool, article.ID, versionID)
	if err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			if !strict {
				return pgx.ErrNoRows
			}
			return response.ErrBadRequest(41005, "invalid_article_version", "article_version_id does not belong to this article")
		}
		return response.ErrInternal(50231, "enterprise_site_article_version_reconstruct_failed", "failed to reconstruct article version")
	}
	if content != nil {
		article.HTMLContent = strings.TrimSpace(enterpriseSiteStringPointerValue(content.HTMLContent))
		article.MarkdownContent = strings.TrimSpace(enterpriseSiteStringPointerValue(content.MarkdownContent))
	}
	if err := s.loadPublishArticleVersionMetadata(ctx, article, versionID); err != nil {
		return err
	}
	return nil
}

func (s *EnterpriseSiteService) loadPublishArticleVersionMetadata(ctx context.Context, article *enterpriseSitePublishArticle, versionID int64) error {
	var title string
	var sourceLabel *string
	if err := s.pool.QueryRow(ctx, `
		SELECT COALESCE(title, ''), COALESCE(word_count, 0), source_label
		FROM article_versions
		WHERE id = $1 AND article_id = $2
	`, versionID, article.ID).Scan(&title, &article.WordCount, &sourceLabel); err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return response.ErrBadRequest(41005, "invalid_article_version", "article_version_id does not belong to this article")
		}
		return response.ErrInternal(50231, "enterprise_site_article_version_lookup_failed", "failed to load article version")
	}
	if strings.TrimSpace(title) != "" {
		article.Title = strings.TrimSpace(title)
	}
	if sourceLabel != nil {
		article.SourceLabel = sourceLabel
	}
	return nil
}

func (s *EnterpriseSiteService) loadPublishArticleVersionSnapshotContent(ctx context.Context, article *enterpriseSitePublishArticle, versionID int64, strict bool) error {
	if article == nil {
		return nil
	}
	var snapshot string
	if err := s.pool.QueryRow(ctx, `
		SELECT COALESCE(plaintext_snapshot, '')
		FROM article_versions
		WHERE id = $1 AND article_id = $2
	`, versionID, article.ID).Scan(&snapshot); err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			if !strict {
				return pgx.ErrNoRows
			}
			return response.ErrBadRequest(41005, "invalid_article_version", "article_version_id does not belong to this article")
		}
		return response.ErrInternal(50231, "enterprise_site_article_version_snapshot_lookup_failed", "failed to load article version")
	}
	snapshot = enterpriseSiteNormalizeStoredContent(snapshot)
	if strings.TrimSpace(snapshot) != "" {
		article.MarkdownContent = snapshot
	}
	return nil
}

func (s *EnterpriseSiteService) loadLatestPublishArticleVersionContent(ctx context.Context, article *enterpriseSitePublishArticle) error {
	var versionID int64
	var title string
	var sourceLabel *string
	err := s.pool.QueryRow(ctx, `
		SELECT id, COALESCE(title, ''), COALESCE(word_count, 0), source_label
		FROM article_versions
		WHERE article_id = $1
		ORDER BY version_no DESC, id DESC
		LIMIT 1
	`, article.ID).Scan(&versionID, &title, &article.WordCount, &sourceLabel)
	if err != nil {
		return err
	}
	article.CurrentVersionID = &versionID
	if strings.TrimSpace(article.Title) == "" && strings.TrimSpace(title) != "" {
		article.Title = strings.TrimSpace(title)
	}
	if article.SourceLabel == nil && sourceLabel != nil {
		article.SourceLabel = sourceLabel
	}
	return s.loadPublishArticleVersionContent(ctx, article, versionID, false)
}

func (s *EnterpriseSiteService) populatePublishArticleWizardFallback(article *enterpriseSitePublishArticle, wizardStateJSON []byte) error {
	if !enterpriseSitePublishArticleContentInvalid(article.HTMLContent, article.MarkdownContent) {
		return nil
	}
	htmlContent, markdownContent := enterpriseSiteContentFromWizardState(wizardStateJSON)
	if strings.TrimSpace(htmlContent) != "" {
		article.HTMLContent = strings.TrimSpace(htmlContent)
	}
	if strings.TrimSpace(markdownContent) != "" {
		article.MarkdownContent = strings.TrimSpace(markdownContent)
	}
	return nil
}

func (s *EnterpriseSiteService) ensureCategoryExists(ctx context.Context, tenantID, workspaceID, connectionID int64, categoryID string) error {
	var exists bool
	if err := s.pool.QueryRow(ctx, `
		SELECT EXISTS (
			SELECT 1
			FROM enterprise_site_categories
			WHERE tenant_id = $1
			  AND workspace_id = $2
			  AND connection_id = $3
			  AND remote_id = $4
		)
	`, tenantID, workspaceID, connectionID, categoryID).Scan(&exists); err != nil {
		return response.ErrInternal(50230, "enterprise_site_category_lookup_failed", "failed to validate enterprise site category")
	}
	if !exists {
		return response.ErrBadRequest(40049, "enterprise_site_category_not_found", "category is not synced for this site")
	}
	return nil
}

func (s *EnterpriseSiteService) loadConnection(ctx context.Context, tenantID, workspaceID, id int64) (*enterpriseSiteConnectionRecord, error) {
	var item enterpriseSiteConnectionRecord
	if err := s.pool.QueryRow(ctx, `
		SELECT
			c.id,
			c.tenant_id,
			c.workspace_id,
			c.name,
			c.site_url,
			c.cms_type,
			c.auth_type,
			c.appid,
			c.credential_ciphertext,
			c.default_acode,
			c.default_mcode,
			c.default_scode,
			c.status,
			c.plugin_version,
			c.site_name,
			c.last_ping_at,
			c.last_sync_at,
			c.last_publish_at,
			c.last_error,
			(
				SELECT COUNT(*)::int
				FROM enterprise_site_categories ec
				WHERE ec.connection_id = c.id
				  AND ec.tenant_id = c.tenant_id
				  AND ec.workspace_id = c.workspace_id
			) AS category_count,
			c.created_at,
			c.updated_at
		FROM enterprise_site_connections c
		WHERE c.id = $1
		  AND c.tenant_id = $2
		  AND c.workspace_id = $3
		  AND c.deleted_at IS NULL
	`, id, tenantID, workspaceID).Scan(
		&item.ID,
		&item.TenantID,
		&item.WorkspaceID,
		&item.Name,
		&item.SiteURL,
		&item.CMSType,
		&item.AuthType,
		&item.AppID,
		&item.CredentialCiphertext,
		&item.DefaultAcode,
		&item.DefaultMcode,
		&item.DefaultScode,
		&item.Status,
		&item.PluginVersion,
		&item.SiteName,
		&item.LastPingAt,
		&item.LastSyncAt,
		&item.LastPublishAt,
		&item.LastError,
		&item.CategoryCount,
		&item.CreatedAt,
		&item.UpdatedAt,
	); err != nil {
		if errors.Is(err, pgx.ErrNoRows) {
			return nil, response.ErrNotFound(40441, "enterprise_site_not_found", "enterprise site connection not found")
		}
		return nil, response.ErrInternal(50220, "enterprise_site_lookup_failed", "failed to load enterprise site")
	}
	return &item, nil
}

func (s *EnterpriseSiteService) connectionCredential(connection *enterpriseSiteConnectionRecord) (enterpriseSiteCredential, error) {
	secret, err := decryptEnterpriseSiteCredential(connection.CredentialCiphertext, s.credentialKeyMaterial())
	if err != nil {
		return enterpriseSiteCredential{}, response.ErrInternal(50231, "enterprise_site_secret_decrypt_failed", "failed to read enterprise site credential")
	}
	return enterpriseSiteCredential{
		SiteURL:      connection.SiteURL,
		AppID:        connection.AppID,
		Secret:       secret,
		DefaultAcode: enterpriseSiteStringPointerValue(connection.DefaultAcode),
		DefaultMcode: enterpriseSiteStringPointerValue(connection.DefaultMcode),
		DefaultScode: enterpriseSiteStringPointerValue(connection.DefaultScode),
	}, nil
}

func (s *EnterpriseSiteService) publisherFor(cmsType string) cmsPublisher {
	switch strings.TrimSpace(cmsType) {
	case pbootCMSPlatformID:
		return newPBootCMSPublisher(s.httpClient)
	default:
		return newPBootCMSPublisher(s.httpClient)
	}
}

func (s *EnterpriseSiteService) credentialKeyMaterial() string {
	if s != nil && s.cfg != nil && s.cfg.Current() != nil {
		if secret := strings.TrimSpace(s.cfg.Current().JWT.Secret); secret != "" {
			return secret
		}
	}
	return ""
}

func (s *EnterpriseSiteService) markConnectionError(ctx context.Context, connectionID, tenantID, workspaceID int64, err error) error {
	message := sanitizeEnterpriseSiteError(err)
	_, updateErr := s.pool.Exec(ctx, `
		UPDATE enterprise_site_connections
		SET status = 'error',
		    last_error = $1,
		    updated_at = NOW()
		WHERE id = $2 AND tenant_id = $3 AND workspace_id = $4 AND deleted_at IS NULL
	`, message, connectionID, tenantID, workspaceID)
	return updateErr
}

func scanEnterpriseSiteConnectionRow(rows pgx.Rows) (*enterpriseSiteConnectionRecord, *EnterpriseSiteLatestPublishRecord, error) {
	var item enterpriseSiteConnectionRecord
	var latestID pgtype.Int8
	var latestArticleID pgtype.Int8
	var latestArticleTitle pgtype.Text
	var latestStatus pgtype.Text
	var latestExternalID pgtype.Text
	var latestExternalURL pgtype.Text
	var latestError pgtype.Text
	var latestPublishedAt pgtype.Timestamptz
	var latestCreatedAt pgtype.Timestamptz
	var latestUpdatedAt pgtype.Timestamptz

	err := rows.Scan(
		&item.ID,
		&item.TenantID,
		&item.WorkspaceID,
		&item.Name,
		&item.SiteURL,
		&item.CMSType,
		&item.AuthType,
		&item.AppID,
		&item.CredentialCiphertext,
		&item.DefaultAcode,
		&item.DefaultMcode,
		&item.DefaultScode,
		&item.Status,
		&item.PluginVersion,
		&item.SiteName,
		&item.LastPingAt,
		&item.LastSyncAt,
		&item.LastPublishAt,
		&item.LastError,
		&item.CategoryCount,
		&item.CreatedAt,
		&item.UpdatedAt,
		&latestID,
		&latestArticleID,
		&latestArticleTitle,
		&latestStatus,
		&latestExternalID,
		&latestExternalURL,
		&latestError,
		&latestPublishedAt,
		&latestCreatedAt,
		&latestUpdatedAt,
	)
	if err != nil {
		return nil, nil, err
	}
	var latest *EnterpriseSiteLatestPublishRecord
	if latestID.Valid && latestArticleID.Valid && latestStatus.Valid && latestCreatedAt.Valid && latestUpdatedAt.Valid {
		latest = &EnterpriseSiteLatestPublishRecord{
			ID:                 latestID.Int64,
			ArticleID:          latestArticleID.Int64,
			ArticleTitle:       enterpriseSiteTextPointer(latestArticleTitle),
			Status:             latestStatus.String,
			ExternalArticleID:  enterpriseSiteTextPointer(latestExternalID),
			ExternalArticleURL: enterpriseSiteTextPointer(latestExternalURL),
			ErrorMessage:       enterpriseSiteTextPointer(latestError),
			PublishedAt:        enterpriseSiteTimePointer(latestPublishedAt),
			CreatedAt:          latestCreatedAt.Time,
			UpdatedAt:          latestUpdatedAt.Time,
		}
	}
	return &item, latest, nil
}

func enterpriseSiteConnectionResponse(item *enterpriseSiteConnectionRecord) EnterpriseSiteConnectionResponse {
	return EnterpriseSiteConnectionResponse{
		ID:            item.ID,
		Name:          item.Name,
		SiteURL:       item.SiteURL,
		CMSType:       item.CMSType,
		AuthType:      item.AuthType,
		AppID:         item.AppID,
		DefaultAcode:  item.DefaultAcode,
		DefaultMcode:  item.DefaultMcode,
		DefaultScode:  item.DefaultScode,
		Status:        item.Status,
		PluginVersion: item.PluginVersion,
		SiteName:      item.SiteName,
		LastPingAt:    item.LastPingAt,
		LastSyncAt:    item.LastSyncAt,
		LastPublishAt: item.LastPublishAt,
		LastError:     item.LastError,
		CategoryCount: item.CategoryCount,
		CreatedAt:     item.CreatedAt,
		UpdatedAt:     item.UpdatedAt,
	}
}

func enterpriseSiteNormalizeLegacyPublishErrorState(item *EnterpriseSiteConnectionResponse) {
	if item == nil || item.Status != "error" || item.LatestRecord == nil {
		return
	}
	switch strings.TrimSpace(item.LatestRecord.Status) {
	case "failed", "publish_failed":
	default:
		return
	}
	lastError := strings.TrimSpace(enterpriseSiteStringPointerValue(item.LastError))
	recordError := strings.TrimSpace(enterpriseSiteStringPointerValue(item.LatestRecord.ErrorMessage))
	if lastError == "" || recordError == "" || lastError != recordError {
		return
	}
	item.Status = "connected"
	item.LastError = nil
}

type normalizedEnterpriseSiteConnectionRequest struct {
	Name         string
	SiteURL      string
	CMSType      string
	AppID        string
	Secret       string
	DefaultAcode *string
	DefaultMcode *string
	DefaultScode *string
}

func normalizeCreateEnterpriseSiteConnectionRequest(req CreateEnterpriseSiteConnectionRequest) (normalizedEnterpriseSiteConnectionRequest, error) {
	siteURL, err := normalizeEnterpriseSiteURL(req.SiteURL)
	if err != nil {
		return normalizedEnterpriseSiteConnectionRequest{}, err
	}
	cmsType := normalizeEnterpriseCMSType(req.CMSType)
	if cmsType != pbootCMSPlatformID {
		return normalizedEnterpriseSiteConnectionRequest{}, response.ErrBadRequest(40040, "enterprise_site_cms_not_supported", "only PBootCMS is supported in this version")
	}
	appid := strings.TrimSpace(req.AppID)
	if appid == "" {
		return normalizedEnterpriseSiteConnectionRequest{}, response.ErrBadRequest(40042, "enterprise_site_appid_required", "appid is required")
	}
	secret := strings.TrimSpace(req.Secret)
	if secret == "" {
		return normalizedEnterpriseSiteConnectionRequest{}, response.ErrBadRequest(40042, "enterprise_site_secret_required", "secret is required")
	}
	name := strings.TrimSpace(req.Name)
	if name == "" {
		if parsed, err := url.Parse(siteURL); err == nil {
			name = parsed.Hostname()
		}
	}
	if name == "" {
		name = "企业站点"
	}
	return normalizedEnterpriseSiteConnectionRequest{
		Name:         name,
		SiteURL:      siteURL,
		CMSType:      cmsType,
		AppID:        appid,
		Secret:       secret,
		DefaultAcode: normalizeOptionalEnterpriseCodePtr(req.DefaultAcode),
		DefaultMcode: normalizeOptionalEnterpriseCodePtr(req.DefaultMcode),
		DefaultScode: normalizeOptionalEnterpriseCodePtr(req.DefaultScode),
	}, nil
}

func normalizeEnterpriseSiteURL(value string) (string, error) {
	trimmed := strings.TrimSpace(value)
	if trimmed == "" {
		return "", response.ErrBadRequest(40041, "enterprise_site_url_required", "site_url is required")
	}
	if !strings.Contains(trimmed, "://") {
		trimmed = "https://" + trimmed
	}
	parsed, err := url.Parse(trimmed)
	if err != nil || parsed.Scheme == "" || parsed.Host == "" {
		return "", response.ErrBadRequest(40041, "invalid_enterprise_site_url", "site_url is invalid")
	}
	scheme := strings.ToLower(parsed.Scheme)
	if scheme != "https" && scheme != "http" {
		return "", response.ErrBadRequest(40041, "invalid_enterprise_site_url", "site_url must be http or https")
	}
	parsed.Scheme = scheme
	parsed.Path = strings.TrimRight(parsed.Path, "/")
	parsed.RawQuery = ""
	parsed.Fragment = ""
	return strings.TrimRight(parsed.String(), "/"), nil
}

func normalizeEnterpriseCMSType(value string) string {
	return strings.ToLower(strings.TrimSpace(value))
}

func normalizeOptionalEnterpriseCodePtr(value *string) *string {
	if value == nil {
		return nil
	}
	return normalizeOptionalEnterpriseCode(*value)
}

func normalizeOptionalEnterpriseCode(value string) *string {
	trimmed := strings.TrimSpace(value)
	if trimmed == "" {
		return nil
	}
	return &trimmed
}

func validEnterpriseSiteStatus(status string) bool {
	switch strings.TrimSpace(status) {
	case "draft", "connected", "error", "disabled":
		return true
	default:
		return false
	}
}

func normalizeEnterprisePublishType(value string) string {
	if strings.TrimSpace(value) == "draft" {
		return "draft"
	}
	return "publish"
}

func enterpriseSitePublishArticleContentInvalid(htmlContent, markdownContent string) bool {
	return enterpriseSiteStoredContentInvalid(htmlContent) && enterpriseSiteStoredContentInvalid(markdownContent)
}

func enterpriseSiteStoredContentInvalid(value string) bool {
	return strings.TrimSpace(enterpriseSiteNormalizeStoredContent(value)) == ""
}

func enterpriseSiteNormalizeStoredContent(value string) string {
	value = strings.TrimSpace(value)
	if value == "" {
		return ""
	}
	if !enterpriseSiteLooksLikeDiffPatch(value) {
		return enterpriseSiteRepairMalformedEditorImageHTML(value)
	}
	if restored, ok := enterpriseSiteRestoreDiffPatchContent(value); ok {
		return strings.TrimSpace(enterpriseSiteRepairMalformedEditorImageHTML(restored))
	}
	return ""
}

func enterpriseSiteRepairMalformedEditorImageHTML(value string) string {
	value = strings.TrimSpace(value)
	if value == "" || !strings.Contains(strings.ToLower(value), "<img") {
		return value
	}
	return enterpriseSiteMalformedEditorImagePattern.ReplaceAllString(value, `$1>$2`)
}

func enterpriseSiteLooksLikeDiffPatch(value string) bool {
	value = strings.TrimSpace(value)
	return strings.HasPrefix(value, "@@ -") && strings.Contains(value, " @@")
}

func enterpriseSiteRestoreDiffPatchContent(value string) (string, bool) {
	dmp := diffmatchpatch.New()
	patches, err := dmp.PatchFromText(strings.TrimSpace(value))
	if err != nil || len(patches) == 0 {
		return "", false
	}
	restored, applied := dmp.PatchApply(patches, "")
	if len(applied) == 0 {
		return "", false
	}
	for _, ok := range applied {
		if !ok {
			return "", false
		}
	}
	return restored, true
}

func enterpriseSiteContentLooksLikeHTML(value string) bool {
	value = strings.ToLower(strings.TrimSpace(value))
	if value == "" {
		return false
	}
	return strings.Contains(value, "<p") ||
		strings.Contains(value, "<div") ||
		strings.Contains(value, "<br") ||
		strings.Contains(value, "<h1") ||
		strings.Contains(value, "<h2") ||
		strings.Contains(value, "<h3") ||
		strings.Contains(value, "<ul") ||
		strings.Contains(value, "<ol") ||
		strings.Contains(value, "<li") ||
		strings.Contains(value, "<img") ||
		strings.Contains(value, "<table") ||
		strings.Contains(value, "<blockquote")
}

func enterpriseSiteContentFromWizardState(raw []byte) (string, string) {
	if len(raw) == 0 {
		return "", ""
	}
	var payload map[string]any
	if err := json.Unmarshal(raw, &payload); err != nil {
		return "", ""
	}
	htmlKeys := []string{"html_content", "htmlContent", "content_html", "article_html", "body_html"}
	markdownKeys := []string{"markdown_content", "markdownContent", "content", "article_content", "body", "text"}

	var htmlContent string
	for _, key := range htmlKeys {
		if value := strings.TrimSpace(enterpriseSiteWizardString(payload[key])); value != "" && !enterpriseSiteStoredContentInvalid(value) {
			htmlContent = value
			break
		}
	}

	var markdownContent string
	for _, key := range markdownKeys {
		if value := strings.TrimSpace(enterpriseSiteWizardString(payload[key])); value != "" && !enterpriseSiteStoredContentInvalid(value) {
			markdownContent = value
			break
		}
	}
	return htmlContent, markdownContent
}

func enterpriseSiteWizardString(value any) string {
	switch typed := value.(type) {
	case nil:
		return ""
	case string:
		return typed
	default:
		return ""
	}
}

func enterpriseSitePublishCoverInput(article enterpriseSitePublishArticle, req PublishEnterpriseSiteArticleRequest) (string, *int64) {
	coverURL := enterpriseSiteStringPointerValue(article.CoverAssetURL)
	if req.CoverAssetURL != nil {
		coverURL = strings.TrimSpace(*req.CoverAssetURL)
	}
	coverImageAssetID := article.CoverImageAssetID
	if req.CoverImageAssetID != nil {
		coverImageAssetID = req.CoverImageAssetID
	}
	return coverURL, coverImageAssetID
}

func (s *EnterpriseSiteService) prepareEnterpriseSitePublishAssets(ctx context.Context, tenantID int64, contentHTML, coverURL string, coverImageAssetID *int64) (string, string) {
	base := s.enterpriseSitePublicBaseURL()
	preparedHTML := s.prepareEnterpriseSiteImageURLs(ctx, tenantID, contentHTML, base)
	preparedCover := s.prepareEnterpriseSiteCoverURL(ctx, tenantID, coverURL, coverImageAssetID, base)
	return preparedHTML, preparedCover
}

func (s *EnterpriseSiteService) prepareEnterpriseSiteCoverURL(ctx context.Context, tenantID int64, coverURL string, coverImageAssetID *int64, baseURL string) string {
	if coverImageAssetID != nil && *coverImageAssetID > 0 {
		if dataURI := s.enterpriseSiteDataURIFromImageAssetID(ctx, tenantID, *coverImageAssetID); dataURI != "" {
			return dataURI
		}
	}
	return s.prepareEnterpriseSiteAssetURL(ctx, tenantID, coverURL, baseURL)
}

func (s *EnterpriseSiteService) enterpriseSitePublicBaseURL() string {
	if s == nil || s.cfg == nil || s.cfg.Current() == nil {
		return ""
	}
	cfg := s.cfg.Current()
	if value := normalizeEnterpriseSiteAssetBaseURL(cfg.Server.PublicBaseURL); value != "" {
		return value
	}
	for _, origin := range cfg.Server.AllowedOrigins {
		if value := normalizeEnterpriseSiteAssetBaseURL(origin); value != "" {
			return value
		}
	}
	port := cfg.Server.Port
	if port <= 0 {
		port = 8080
	}
	return "http://127.0.0.1:" + strconv.Itoa(port)
}

func normalizeEnterpriseSiteAssetBaseURL(value string) string {
	value = strings.TrimSpace(value)
	if value == "" || value == "*" {
		return ""
	}
	parsed, err := url.Parse(value)
	if err != nil || parsed.Scheme == "" || parsed.Host == "" {
		return ""
	}
	if parsed.Scheme != "http" && parsed.Scheme != "https" {
		return ""
	}
	parsed.RawQuery = ""
	parsed.Fragment = ""
	return strings.TrimRight(parsed.String(), "/")
}

func (s *EnterpriseSiteService) prepareEnterpriseSiteImageURLs(ctx context.Context, tenantID int64, fragment string, baseURL string) string {
	if strings.TrimSpace(fragment) == "" || !strings.Contains(strings.ToLower(fragment), "<img") {
		return fragment
	}
	contextNode := &html.Node{
		Type:     html.ElementNode,
		Data:     "body",
		DataAtom: atom.Body,
	}
	nodes, err := html.ParseFragment(strings.NewReader(fragment), contextNode)
	if err != nil {
		return s.prepareEnterpriseSiteImageURLsFallback(ctx, tenantID, fragment, baseURL)
	}
	for _, node := range nodes {
		s.prepareEnterpriseSiteImageNodeURLs(ctx, tenantID, node, baseURL)
	}
	nodes = enterpriseSitePruneEmptyImageWrapperNodes(nodes)
	return enterpriseSiteRenderHTMLNodes(nodes, s.prepareEnterpriseSiteImageURLsFallback(ctx, tenantID, fragment, baseURL))
}

func (s *EnterpriseSiteService) prepareEnterpriseSiteImageNodeURLs(ctx context.Context, tenantID int64, node *html.Node, baseURL string) {
	if node == nil {
		return
	}
	if node.Type == html.ElementNode && strings.EqualFold(node.Data, "img") {
		if !s.prepareEnterpriseSiteImageAttrs(ctx, tenantID, node, baseURL) {
			enterpriseSiteRemoveHTMLNode(node)
			return
		}
	}
	for child := node.FirstChild; child != nil; {
		next := child.NextSibling
		s.prepareEnterpriseSiteImageNodeURLs(ctx, tenantID, child, baseURL)
		child = next
	}
}

func (s *EnterpriseSiteService) prepareEnterpriseSiteImageAttrs(ctx context.Context, tenantID int64, node *html.Node, baseURL string) bool {
	if node == nil {
		return true
	}
	dataURI := s.enterpriseSiteDataURIFromImageNode(ctx, tenantID, node)
	hasImageURL := false
	for idx := range node.Attr {
		key := strings.ToLower(strings.TrimSpace(node.Attr[idx].Key))
		if key != "src" && key != "data-src" && key != "_src" {
			continue
		}
		hasImageURL = true
		if dataURI != "" {
			node.Attr[idx].Val = dataURI
			continue
		}
		node.Attr[idx].Val = s.prepareEnterpriseSiteAssetURL(ctx, tenantID, node.Attr[idx].Val, baseURL)
		if strings.TrimSpace(node.Attr[idx].Val) == "" {
			return false
		}
	}
	node.Attr = enterpriseSiteStripSaaSImageAttrs(node.Attr)
	return hasImageURL
}

func enterpriseSiteStripSaaSImageAttrs(attrs []html.Attribute) []html.Attribute {
	if len(attrs) == 0 {
		return attrs
	}
	cleaned := make([]html.Attribute, 0, len(attrs))
	for _, attr := range attrs {
		key := strings.ToLower(strings.TrimSpace(attr.Key))
		if key == "data-asset-id" || key == "asset-id" {
			continue
		}
		cleaned = append(cleaned, attr)
	}
	return cleaned
}

func enterpriseSiteRemoveHTMLNode(node *html.Node) {
	if node == nil || node.Parent == nil {
		return
	}
	parent := node.Parent
	parent.RemoveChild(node)
	if enterpriseSiteHTMLNodeIsEmptyImageWrapper(parent) {
		enterpriseSiteRemoveHTMLNode(parent)
	}
}

func enterpriseSiteHTMLNodeIsEmptyImageWrapper(node *html.Node) bool {
	if node == nil || node.Type != html.ElementNode || !strings.EqualFold(node.Data, "p") {
		return false
	}
	for child := node.FirstChild; child != nil; child = child.NextSibling {
		if child.Type == html.TextNode && strings.TrimSpace(child.Data) == "" {
			continue
		}
		return false
	}
	if len(node.Attr) == 0 {
		return true
	}
	for _, attr := range node.Attr {
		key := strings.ToLower(strings.TrimSpace(attr.Key))
		value := strings.ToLower(strings.TrimSpace(attr.Val))
		if key == "class" && strings.Contains(value, "article-editor-image") {
			return true
		}
		if key == "align" && value == "center" {
			continue
		}
	}
	return false
}

func enterpriseSitePruneEmptyImageWrapperNodes(nodes []*html.Node) []*html.Node {
	if len(nodes) == 0 {
		return nodes
	}
	pruned := make([]*html.Node, 0, len(nodes))
	for _, node := range nodes {
		if enterpriseSiteHTMLNodeIsEmptyImageWrapper(node) {
			continue
		}
		pruned = append(pruned, node)
	}
	return pruned
}

func (s *EnterpriseSiteService) prepareEnterpriseSiteAssetURL(ctx context.Context, tenantID int64, value string, baseURL string) string {
	value = strings.TrimSpace(value)
	if value == "" || strings.HasPrefix(strings.ToLower(value), "data:") {
		return value
	}
	if dataURI := s.enterpriseSiteDataURIFromAssetURL(ctx, tenantID, value); dataURI != "" {
		return dataURI
	}
	if enterpriseSiteLooksLikeSaaSAssetURL(value) {
		return ""
	}
	return enterpriseSiteAbsoluteAssetURL(value, baseURL)
}

func (s *EnterpriseSiteService) prepareEnterpriseSiteImageURLsFallback(ctx context.Context, tenantID int64, fragment string, baseURL string) string {
	return enterpriseSiteImageAttrPattern.ReplaceAllStringFunc(fragment, func(match string) string {
		parts := enterpriseSiteImageAttrPattern.FindStringSubmatch(match)
		if len(parts) != 4 {
			return match
		}
		return parts[1] + s.prepareEnterpriseSiteAssetURL(ctx, tenantID, parts[2], baseURL) + parts[3]
	})
}

func (s *EnterpriseSiteService) enterpriseSiteDataURIFromAssetURL(ctx context.Context, tenantID int64, value string) string {
	objectKey, ok := s.enterpriseSiteObjectKeyFromAssetURL(ctx, tenantID, value)
	if !ok || s == nil || s.storage == nil {
		return ""
	}
	return s.enterpriseSiteDataURIFromObjectKey(ctx, objectKey)
}

func (s *EnterpriseSiteService) enterpriseSiteDataURIFromImageNode(ctx context.Context, tenantID int64, node *html.Node) string {
	assetID := enterpriseSiteImageNodeAssetID(node)
	if assetID <= 0 {
		return ""
	}
	return s.enterpriseSiteDataURIFromImageAssetID(ctx, tenantID, assetID)
}

func (s *EnterpriseSiteService) enterpriseSiteDataURIFromImageAssetID(ctx context.Context, tenantID, assetID int64) string {
	objectKey, ok := s.loadEnterpriseSiteImageAssetObjectKey(ctx, tenantID, assetID)
	if !ok || s == nil || s.storage == nil {
		return ""
	}
	return s.enterpriseSiteDataURIFromObjectKey(ctx, objectKey)
}

func (s *EnterpriseSiteService) enterpriseSiteDataURIFromObjectKey(ctx context.Context, objectKey string) string {
	content, err := s.storage.GetBytes(ctx, objectKey)
	if err != nil || len(content) == 0 {
		return ""
	}
	contentType := enterpriseSiteImageContentType(content, objectKey)
	if contentType == "" {
		return ""
	}
	return "data:" + contentType + ";base64," + base64.StdEncoding.EncodeToString(content)
}

func enterpriseSiteImageContentType(content []byte, objectKey string) string {
	contentType := strings.ToLower(strings.TrimSpace(http.DetectContentType(content)))
	if strings.HasPrefix(contentType, "image/") {
		return contentType
	}
	lowerKey := strings.ToLower(strings.TrimSpace(objectKey))
	switch {
	case strings.HasSuffix(lowerKey, ".webp"):
		return "image/webp"
	case strings.HasSuffix(lowerKey, ".png"):
		return "image/png"
	case strings.HasSuffix(lowerKey, ".jpg"), strings.HasSuffix(lowerKey, ".jpeg"):
		return "image/jpeg"
	case strings.HasSuffix(lowerKey, ".gif"):
		return "image/gif"
	default:
		return ""
	}
}

func enterpriseSiteImageNodeAssetID(node *html.Node) int64 {
	if node == nil {
		return 0
	}
	for _, attr := range node.Attr {
		key := strings.ToLower(strings.TrimSpace(attr.Key))
		if key != "data-asset-id" && key != "asset-id" {
			continue
		}
		id, err := strconv.ParseInt(strings.TrimSpace(attr.Val), 10, 64)
		if err == nil && id > 0 {
			return id
		}
	}
	return 0
}

func (s *EnterpriseSiteService) enterpriseSiteObjectKeyFromAssetURL(ctx context.Context, tenantID int64, value string) (string, bool) {
	if objectKey, ok := enterpriseSiteObjectKeyFromPublicAssetURL(value, tenantID, s.enterpriseSiteAssetTokenSecret()); ok {
		return objectKey, true
	}
	assetID, ok := enterpriseSiteAssetIDFromURL(value)
	if !ok {
		return "", false
	}
	return s.loadEnterpriseSiteImageAssetObjectKey(ctx, tenantID, assetID)
}

func (s *EnterpriseSiteService) loadEnterpriseSiteImageAssetObjectKey(ctx context.Context, tenantID, assetID int64) (string, bool) {
	if s == nil || s.pool == nil || tenantID <= 0 || assetID <= 0 {
		return "", false
	}
	var objectKey string
	if err := s.pool.QueryRow(ctx, `
		SELECT object_key
		FROM image_assets
		WHERE id = $1 AND tenant_id = $2 AND status = 'active' AND deleted_at IS NULL
	`, assetID, tenantID).Scan(&objectKey); err != nil {
		return "", false
	}
	if !enterpriseSiteObjectKeyAllowedForTenant(objectKey, tenantID) {
		return "", false
	}
	return objectKey, true
}

func (s *EnterpriseSiteService) enterpriseSiteAssetTokenSecret() string {
	if s == nil || s.cfg == nil || s.cfg.Current() == nil {
		return ""
	}
	return strings.TrimSpace(s.cfg.Current().JWT.Secret)
}

func enterpriseSiteObjectKeyFromPublicAssetURL(raw string, tenantID int64, secret string) (string, bool) {
	token, ok := enterpriseSitePublicAssetTokenFromURL(raw)
	if !ok {
		return "", false
	}
	objectKey, valid := publicasset.ParseObjectKeyToken(token, secret)
	if !valid {
		objectKey, valid = publicasset.ObjectKeyFromToken(token)
	}
	if !valid || !enterpriseSiteObjectKeyAllowedForTenant(objectKey, tenantID) {
		return "", false
	}
	return objectKey, true
}

func enterpriseSiteLooksLikeSaaSAssetURL(raw string) bool {
	_, ok := enterpriseSitePublicAssetTokenFromURL(raw)
	return ok
}

func enterpriseSitePublicAssetTokenFromURL(raw string) (string, bool) {
	raw = strings.TrimSpace(raw)
	if raw == "" {
		return "", false
	}
	if token, ok := enterpriseSiteAssetTokenFromPath(raw); ok {
		return token, true
	}
	parsed, err := url.Parse(raw)
	if err != nil {
		return "", false
	}
	if token, ok := enterpriseSiteAssetTokenFromPath(parsed.Path); ok {
		return token, true
	}
	return "", false
}

func enterpriseSiteAssetTokenFromPath(pathValue string) (string, bool) {
	pathValue = strings.TrimSpace(pathValue)
	if pathValue == "" {
		return "", false
	}
	pathValue = strings.TrimLeft(pathValue, "/")
	for _, prefix := range []string{"api/public/assets/", "api/desktop/content/assets/", "public/assets/", "assets/"} {
		if strings.HasPrefix(pathValue, prefix) {
			token := strings.TrimPrefix(pathValue, prefix)
			if slash := strings.Index(token, "/"); slash >= 0 {
				token = token[:slash]
			}
			if idx := strings.IndexAny(token, "?#"); idx >= 0 {
				token = token[:idx]
			}
			token, _ = url.PathUnescape(token)
			return strings.TrimSpace(token), strings.TrimSpace(token) != ""
		}
	}
	return "", false
}

func enterpriseSiteAssetIDFromURL(raw string) (int64, bool) {
	parsed, err := url.Parse(strings.TrimSpace(raw))
	if err != nil {
		return 0, false
	}
	value := strings.TrimSpace(parsed.Query().Get("data-asset-id"))
	if value == "" {
		value = strings.TrimSpace(parsed.Query().Get("asset_id"))
	}
	if value == "" {
		return 0, false
	}
	id, err := strconv.ParseInt(value, 10, 64)
	return id, err == nil && id > 0
}

func enterpriseSiteObjectKeyAllowedForTenant(objectKey string, tenantID int64) bool {
	if tenantID <= 0 {
		return false
	}
	tenantPrefix := "tenants/" + strconv.FormatInt(tenantID, 10) + "/"
	return strings.HasPrefix(objectKey, tenantPrefix+"images/") ||
		strings.HasPrefix(objectKey, tenantPrefix+"articles/")
}

func enterpriseSiteAbsoluteImageURLs(fragment string, baseURL string) string {
	if strings.TrimSpace(fragment) == "" || !strings.Contains(strings.ToLower(fragment), "<img") {
		return fragment
	}
	contextNode := &html.Node{
		Type:     html.ElementNode,
		Data:     "body",
		DataAtom: atom.Body,
	}
	nodes, err := html.ParseFragment(strings.NewReader(fragment), contextNode)
	if err != nil {
		return enterpriseSiteAbsoluteImageURLsFallback(fragment, baseURL)
	}
	for _, node := range nodes {
		enterpriseSiteRewriteImageNodeURLs(node, baseURL)
	}
	var builder strings.Builder
	for _, node := range nodes {
		if err := html.Render(&builder, node); err != nil {
			return enterpriseSiteAbsoluteImageURLsFallback(fragment, baseURL)
		}
	}
	return builder.String()
}

func enterpriseSiteRewriteImageNodeURLs(node *html.Node, baseURL string) {
	if node == nil {
		return
	}
	if node.Type == html.ElementNode && strings.EqualFold(node.Data, "img") {
		for idx := range node.Attr {
			key := strings.ToLower(strings.TrimSpace(node.Attr[idx].Key))
			if key != "src" && key != "data-src" && key != "_src" {
				continue
			}
			node.Attr[idx].Val = enterpriseSiteAbsoluteAssetURL(node.Attr[idx].Val, baseURL)
		}
	}
	for child := node.FirstChild; child != nil; child = child.NextSibling {
		enterpriseSiteRewriteImageNodeURLs(child, baseURL)
	}
}

func enterpriseSiteAbsoluteImageURLsFallback(fragment string, baseURL string) string {
	return enterpriseSiteImageAttrPattern.ReplaceAllStringFunc(fragment, func(match string) string {
		parts := enterpriseSiteImageAttrPattern.FindStringSubmatch(match)
		if len(parts) != 4 {
			return match
		}
		return parts[1] + enterpriseSiteAbsoluteAssetURL(parts[2], baseURL) + parts[3]
	})
}

func enterpriseSiteAbsoluteAssetURL(value string, baseURL string) string {
	value = strings.TrimSpace(value)
	if value == "" || strings.HasPrefix(strings.ToLower(value), "data:") {
		return value
	}
	parsed, err := url.Parse(value)
	if err == nil && parsed.Scheme != "" {
		return value
	}
	baseURL = strings.TrimRight(strings.TrimSpace(baseURL), "/")
	if baseURL == "" {
		return value
	}
	if strings.HasPrefix(value, "//") {
		base, err := url.Parse(baseURL)
		if err != nil || base.Scheme == "" {
			return value
		}
		return base.Scheme + ":" + value
	}
	if strings.HasPrefix(value, "/") {
		return baseURL + value
	}
	return baseURL + "/" + strings.TrimLeft(value, "/")
}

func enterpriseSiteStripLeadingTitleHeadingHTML(fragment string, title string) string {
	normalizedTitle := enterpriseSiteNormalizeHeadingText(title)
	if normalizedTitle == "" || strings.TrimSpace(fragment) == "" {
		return fragment
	}
	contextNode := &html.Node{
		Type:     html.ElementNode,
		Data:     "body",
		DataAtom: atom.Body,
	}
	nodes, err := html.ParseFragment(strings.NewReader(fragment), contextNode)
	if err != nil {
		return enterpriseSiteStripLeadingTitleHeadingHTMLFallback(fragment, normalizedTitle)
	}

	first := enterpriseSiteFirstMeaningfulHTMLNode(nodes)
	if enterpriseSiteHTMLNodeIsTitleHeading(first, normalizedTitle) {
		return enterpriseSiteRenderHTMLNodes(enterpriseSiteWithoutTopLevelHTMLNode(nodes, first), fragment)
	}
	if enterpriseSiteHTMLNodeIsContentWrapper(first) {
		child := enterpriseSiteFirstMeaningfulHTMLChild(first)
		if enterpriseSiteHTMLNodeIsTitleHeading(child, normalizedTitle) {
			first.RemoveChild(child)
			if enterpriseSiteHTMLNodeIsSkippable(first) {
				nodes = enterpriseSiteWithoutTopLevelHTMLNode(nodes, first)
			}
			return enterpriseSiteRenderHTMLNodes(nodes, fragment)
		}
	}
	return fragment
}

func enterpriseSiteStripLeadingTitleHeadingHTMLFallback(fragment string, normalizedTitle string) string {
	match := regexp.MustCompile(`(?is)^\s*<h[12]\b[^>]*>(.*?)</h[12]>\s*`).FindStringSubmatchIndex(fragment)
	if len(match) != 4 {
		return fragment
	}
	heading := enterpriseSiteSummaryTagPattern.ReplaceAllString(fragment[match[2]:match[3]], " ")
	if enterpriseSiteNormalizeHeadingText(heading) != normalizedTitle {
		return fragment
	}
	return strings.TrimSpace(fragment[match[1]:])
}

func enterpriseSiteStripLeadingTitleHeadingMarkdown(markdownContent string, title string) string {
	normalizedTitle := enterpriseSiteNormalizeHeadingText(title)
	if normalizedTitle == "" || strings.TrimSpace(markdownContent) == "" {
		return markdownContent
	}
	normalizedMarkdown := strings.TrimPrefix(markdownContent, "\uFEFF")
	lineEnd := strings.IndexByte(normalizedMarkdown, '\n')
	firstLine := normalizedMarkdown
	rest := ""
	if lineEnd >= 0 {
		firstLine = strings.TrimSuffix(normalizedMarkdown[:lineEnd], "\r")
		rest = normalizedMarkdown[lineEnd+1:]
	}
	match := enterpriseSiteMarkdownHeadingPattern.FindStringSubmatch(strings.TrimSpace(firstLine))
	if len(match) == 2 && enterpriseSiteNormalizeHeadingText(match[1]) == normalizedTitle {
		return strings.TrimSpace(rest)
	}
	if enterpriseSiteNormalizeHeadingText(firstLine) == normalizedTitle {
		return strings.TrimSpace(rest)
	}
	return markdownContent
}

func enterpriseSiteNormalizeHeadingText(value string) string {
	value = strings.TrimPrefix(strings.TrimSpace(value), "\uFEFF")
	return strings.Join(strings.Fields(value), " ")
}

func enterpriseSiteFirstMeaningfulHTMLNode(nodes []*html.Node) *html.Node {
	for _, node := range nodes {
		if !enterpriseSiteHTMLNodeIsSkippable(node) {
			return node
		}
	}
	return nil
}

func enterpriseSiteFirstMeaningfulHTMLChild(node *html.Node) *html.Node {
	if node == nil {
		return nil
	}
	for child := node.FirstChild; child != nil; child = child.NextSibling {
		if !enterpriseSiteHTMLNodeIsSkippable(child) {
			return child
		}
	}
	return nil
}

func enterpriseSiteHTMLNodeIsTitleHeading(node *html.Node, normalizedTitle string) bool {
	if node == nil || node.Type != html.ElementNode {
		return false
	}
	tagName := strings.ToLower(strings.TrimSpace(node.Data))
	if tagName != "h1" && tagName != "h2" {
		return false
	}
	return enterpriseSiteNormalizeHeadingText(enterpriseSiteHTMLNodeText(node)) == normalizedTitle
}

func enterpriseSiteHTMLNodeText(node *html.Node) string {
	if node == nil {
		return ""
	}
	var builder strings.Builder
	enterpriseSiteAppendHTMLNodeText(&builder, node)
	return builder.String()
}

func enterpriseSiteAppendHTMLNodeText(builder *strings.Builder, node *html.Node) {
	if node == nil {
		return
	}
	if node.Type == html.TextNode {
		builder.WriteString(node.Data)
		return
	}
	for child := node.FirstChild; child != nil; child = child.NextSibling {
		enterpriseSiteAppendHTMLNodeText(builder, child)
	}
}

func enterpriseSiteHTMLNodeIsContentWrapper(node *html.Node) bool {
	if node == nil || node.Type != html.ElementNode {
		return false
	}
	switch strings.ToLower(strings.TrimSpace(node.Data)) {
	case "article", "div", "main", "section":
		return true
	default:
		return false
	}
}

func enterpriseSiteHTMLNodeIsSkippable(node *html.Node) bool {
	if node == nil {
		return true
	}
	switch node.Type {
	case html.CommentNode:
		return true
	case html.TextNode:
		return enterpriseSiteNormalizeHeadingText(node.Data) == ""
	case html.ElementNode:
		if strings.EqualFold(node.Data, "br") {
			return true
		}
		return enterpriseSiteNormalizeHeadingText(enterpriseSiteHTMLNodeText(node)) == "" && !enterpriseSiteHTMLNodeHasNonTextContent(node)
	default:
		return false
	}
}

func enterpriseSiteHTMLNodeHasNonTextContent(node *html.Node) bool {
	if node == nil {
		return false
	}
	if node.Type == html.ElementNode {
		switch strings.ToLower(strings.TrimSpace(node.Data)) {
		case "audio", "canvas", "embed", "iframe", "img", "object", "svg", "table", "video":
			return true
		}
	}
	for child := node.FirstChild; child != nil; child = child.NextSibling {
		if enterpriseSiteHTMLNodeHasNonTextContent(child) {
			return true
		}
	}
	return false
}

func enterpriseSiteWithoutTopLevelHTMLNode(nodes []*html.Node, remove *html.Node) []*html.Node {
	if remove == nil {
		return nodes
	}
	filtered := make([]*html.Node, 0, len(nodes))
	for _, node := range nodes {
		if node != remove {
			filtered = append(filtered, node)
		}
	}
	return filtered
}

func enterpriseSiteRenderHTMLNodes(nodes []*html.Node, fallback string) string {
	var builder strings.Builder
	for _, node := range nodes {
		if err := html.Render(&builder, node); err != nil {
			return fallback
		}
	}
	return strings.TrimSpace(builder.String())
}

func markdownToEnterpriseSiteHTML(markdown string) (string, error) {
	renderer := goldmark.New(
		goldmark.WithExtensions(extension.GFM),
		goldmark.WithRendererOptions(goldhtml.WithUnsafe()),
	)
	var out bytes.Buffer
	if err := renderer.Convert([]byte(strings.TrimSpace(markdown)), &out); err != nil {
		return "", err
	}
	return out.String(), nil
}

func enterpriseSiteDescription(htmlContent, markdownContent string) string {
	text := strings.TrimSpace(enterpriseSiteSummaryTagPattern.ReplaceAllString(htmlContent, ""))
	if text == "" {
		text = enterpriseSitePlainTextFromMarkdown(markdownContent)
	}
	text = strings.Join(strings.Fields(text), " ")
	if text == "" {
		return ""
	}
	if len([]rune(text)) <= 150 {
		return text
	}
	runes := []rune(text)
	return string(runes[:150])
}

func enterpriseSitePlainTextFromMarkdown(markdownContent string) string {
	lines := strings.Split(strings.TrimSpace(markdownContent), "\n")
	cleaned := make([]string, 0, len(lines))
	for _, line := range lines {
		line = strings.TrimSpace(line)
		if line == "" {
			continue
		}
		line = strings.TrimLeft(line, "#")
		line = strings.TrimSpace(line)
		line = strings.TrimLeft(line, "-*")
		line = strings.TrimSpace(line)
		if line != "" {
			cleaned = append(cleaned, line)
		}
	}
	return strings.Join(cleaned, " ")
}

func sanitizeEnterpriseSiteError(err error) string {
	if err == nil {
		return ""
	}
	message := strings.TrimSpace(err.Error())
	if message == "" {
		return "CMS request failed"
	}
	for _, marker := range []string{"api_secret", "secret", "signature", "appid="} {
		if strings.Contains(strings.ToLower(message), strings.ToLower(marker)) {
			return "CMS request failed; please verify site credentials and plugin installation"
		}
	}
	if len([]rune(message)) > 300 {
		runes := []rune(message)
		return string(runes[:300])
	}
	return message
}

func enterpriseSiteStringPointerValue(value *string) string {
	if value == nil {
		return ""
	}
	return *value
}

func enterpriseSiteTextPointer(value pgtype.Text) *string {
	if !value.Valid {
		return nil
	}
	trimmed := strings.TrimSpace(value.String)
	if trimmed == "" {
		return nil
	}
	return &trimmed
}

func enterpriseSiteTimePointer(value pgtype.Timestamptz) *time.Time {
	if !value.Valid {
		return nil
	}
	return &value.Time
}