package repository

import (
	"context"
	"time"

	"github.com/google/uuid"

	"github.com/geo-platform/tenant-api/internal/tenant/repository/generated"
)

type DesktopClient struct {
	ID            uuid.UUID
	TenantID      int64
	WorkspaceID   int64
	UserID        int64
	TokenHash     []byte
	DeviceName    *string
	OS            *string
	CPUArch       *string
	ClientVersion *string
	Channel       *string
	CreatedAt     time.Time
	LastSeenAt    *time.Time
	LastRotatedAt *time.Time
	RevokedAt     *time.Time
}

type RegisterDesktopClientParams struct {
	ID            uuid.UUID
	TenantID      int64
	WorkspaceID   int64
	UserID        int64
	TokenHash     []byte
	DeviceName    *string
	OS            *string
	CPUArch       *string
	ClientVersion *string
	Channel       *string
}

type HeartbeatDesktopClientParams struct {
	ID            uuid.UUID
	WorkspaceID   int64
	DeviceName    *string
	OS            *string
	CPUArch       *string
	ClientVersion *string
	Channel       *string
}

type RotateDesktopClientTokenParams struct {
	ID          uuid.UUID
	WorkspaceID int64
	TokenHash   []byte
}

type DesktopClientRepository interface {
	Register(ctx context.Context, params RegisterDesktopClientParams) (*DesktopClient, error)
	GetByID(ctx context.Context, id uuid.UUID, workspaceID int64) (*DesktopClient, error)
	GetByTokenHash(ctx context.Context, tokenHash []byte) (*DesktopClient, error)
	RotateToken(ctx context.Context, params RotateDesktopClientTokenParams) (*DesktopClient, error)
	Heartbeat(ctx context.Context, params HeartbeatDesktopClientParams) (*DesktopClient, error)
	Revoke(ctx context.Context, id uuid.UUID, workspaceID int64) (*DesktopClient, error)
	ListByWorkspace(ctx context.Context, workspaceID int64) ([]DesktopClient, error)
}

type desktopClientRepository struct {
	q generated.Querier
}

func NewDesktopClientRepository(db generated.DBTX) DesktopClientRepository {
	return &desktopClientRepository{q: newQuerier(db)}
}

func (r *desktopClientRepository) Register(ctx context.Context, params RegisterDesktopClientParams) (*DesktopClient, error) {
	row, err := r.q.RegisterDesktopClient(ctx, generated.RegisterDesktopClientParams{
		ID:            pgUUID(params.ID),
		TenantID:      params.TenantID,
		WorkspaceID:   params.WorkspaceID,
		UserID:        params.UserID,
		TokenHash:     params.TokenHash,
		DeviceName:    pgText(params.DeviceName),
		Os:            pgText(params.OS),
		CpuArch:       pgText(params.CPUArch),
		ClientVersion: pgText(params.ClientVersion),
		Channel:       pgText(params.Channel),
	})
	if err != nil {
		return nil, err
	}
	return desktopClientFromGenerated(row), nil
}

func (r *desktopClientRepository) GetByID(ctx context.Context, id uuid.UUID, workspaceID int64) (*DesktopClient, error) {
	row, err := r.q.GetDesktopClientByID(ctx, generated.GetDesktopClientByIDParams{
		ID:          pgUUID(id),
		WorkspaceID: workspaceID,
	})
	if err != nil {
		return nil, err
	}
	return desktopClientFromGenerated(row), nil
}

func (r *desktopClientRepository) GetByTokenHash(ctx context.Context, tokenHash []byte) (*DesktopClient, error) {
	row, err := r.q.GetDesktopClientByTokenHash(ctx, tokenHash)
	if err != nil {
		return nil, err
	}
	return desktopClientFromGenerated(row), nil
}

func (r *desktopClientRepository) RotateToken(ctx context.Context, params RotateDesktopClientTokenParams) (*DesktopClient, error) {
	row, err := r.q.RotateDesktopClientToken(ctx, generated.RotateDesktopClientTokenParams{
		ID:          pgUUID(params.ID),
		WorkspaceID: params.WorkspaceID,
		TokenHash:   params.TokenHash,
	})
	if err != nil {
		return nil, err
	}
	return desktopClientFromGenerated(row), nil
}

func (r *desktopClientRepository) Heartbeat(ctx context.Context, params HeartbeatDesktopClientParams) (*DesktopClient, error) {
	row, err := r.q.HeartbeatDesktopClient(ctx, generated.HeartbeatDesktopClientParams{
		ID:            pgUUID(params.ID),
		WorkspaceID:   params.WorkspaceID,
		DeviceName:    pgText(params.DeviceName),
		Os:            pgText(params.OS),
		CpuArch:       pgText(params.CPUArch),
		ClientVersion: pgText(params.ClientVersion),
		Channel:       pgText(params.Channel),
	})
	if err != nil {
		return nil, err
	}
	return desktopClientFromGenerated(row), nil
}

func (r *desktopClientRepository) Revoke(ctx context.Context, id uuid.UUID, workspaceID int64) (*DesktopClient, error) {
	row, err := r.q.RevokeDesktopClient(ctx, generated.RevokeDesktopClientParams{
		ID:          pgUUID(id),
		WorkspaceID: workspaceID,
	})
	if err != nil {
		return nil, err
	}
	return desktopClientFromGenerated(row), nil
}

func (r *desktopClientRepository) ListByWorkspace(ctx context.Context, workspaceID int64) ([]DesktopClient, error) {
	rows, err := r.q.ListDesktopClientsByWorkspace(ctx, workspaceID)
	if err != nil {
		return nil, err
	}

	items := make([]DesktopClient, 0, len(rows))
	for _, row := range rows {
		item := desktopClientFromGenerated(row)
		if item != nil {
			items = append(items, *item)
		}
	}
	return items, nil
}

func desktopClientFromGenerated(row generated.DesktopClient) *DesktopClient {
	return &DesktopClient{
		ID:            uuidFromPG(row.ID),
		TenantID:      row.TenantID,
		WorkspaceID:   row.WorkspaceID,
		UserID:        row.UserID,
		TokenHash:     row.TokenHash,
		DeviceName:    nullableText(row.DeviceName),
		OS:            nullableText(row.Os),
		CPUArch:       nullableText(row.CpuArch),
		ClientVersion: nullableText(row.ClientVersion),
		Channel:       nullableText(row.Channel),
		CreatedAt:     timeFromTimestamp(row.CreatedAt),
		LastSeenAt:    optionalTime(row.LastSeenAt),
		LastRotatedAt: optionalTime(row.LastRotatedAt),
		RevokedAt:     optionalTime(row.RevokedAt),
	}
}