package transport

import (
	"strconv"

	"github.com/gin-gonic/gin"

	"github.com/geo-platform/tenant-api/internal/ops/app"
	"github.com/geo-platform/tenant-api/internal/shared/response"
)

type createAccountRequest struct {
	Username    string `json:"username" binding:"required"`
	Password    string `json:"password" binding:"required"`
	DisplayName string `json:"display_name"`
	Email       string `json:"email"`
	Role        string `json:"role"`
}

type updateProfileRequest struct {
	DisplayName string `json:"display_name" binding:"required"`
	Email       string `json:"email"`
}

type setStatusRequest struct {
	Status string `json:"status" binding:"required"`
}

type resetPasswordRequest struct {
	Password string `json:"password" binding:"required"`
}

type changeOwnPasswordRequest struct {
	OldPassword string `json:"old_password" binding:"required"`
	NewPassword string `json:"new_password" binding:"required"`
}

func listAccountsHandler(svc *app.AccountService) gin.HandlerFunc {
	return func(c *gin.Context) {
		page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
		size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
		result, err := svc.List(c.Request.Context(), app.ListInput{
			Keyword: c.Query("keyword"),
			Status:  c.Query("status"),
			Page:    page,
			Size:    size,
		})
		if err != nil {
			response.Error(c, err)
			return
		}
		response.Success(c, result)
	}
}

func createAccountHandler(svc *app.AccountService) gin.HandlerFunc {
	return func(c *gin.Context) {
		var body createAccountRequest
		if err := c.ShouldBindJSON(&body); err != nil {
			response.Error(c, response.ErrBadRequest(40000, "invalid_payload", err.Error()))
			return
		}
		actor := actorFromGin(c)
		detail, err := svc.Create(c.Request.Context(), actor, app.CreateInput{
			Username:    body.Username,
			Password:    body.Password,
			DisplayName: body.DisplayName,
			Email:       body.Email,
			Role:        body.Role,
		})
		if err != nil {
			response.Error(c, err)
			return
		}
		response.Success(c, detail)
	}
}

func getAccountHandler(svc *app.AccountService) gin.HandlerFunc {
	return func(c *gin.Context) {
		id, err := parseIDParam(c)
		if err != nil {
			response.Error(c, err)
			return
		}
		detail, err := svc.Get(c.Request.Context(), id)
		if err != nil {
			response.Error(c, err)
			return
		}
		response.Success(c, detail)
	}
}

func updateAccountProfileHandler(svc *app.AccountService) gin.HandlerFunc {
	return func(c *gin.Context) {
		id, err := parseIDParam(c)
		if err != nil {
			response.Error(c, err)
			return
		}
		var body updateProfileRequest
		if err := c.ShouldBindJSON(&body); err != nil {
			response.Error(c, response.ErrBadRequest(40000, "invalid_payload", err.Error()))
			return
		}
		if err := svc.UpdateProfile(c.Request.Context(), actorFromGin(c), id, app.UpdateProfileInput{
			DisplayName: body.DisplayName,
			Email:       body.Email,
		}); err != nil {
			response.Error(c, err)
			return
		}
		response.Success(c, gin.H{"id": id})
	}
}

func setAccountStatusHandler(svc *app.AccountService) gin.HandlerFunc {
	return func(c *gin.Context) {
		id, err := parseIDParam(c)
		if err != nil {
			response.Error(c, err)
			return
		}
		var body setStatusRequest
		if err := c.ShouldBindJSON(&body); err != nil {
			response.Error(c, response.ErrBadRequest(40000, "invalid_payload", err.Error()))
			return
		}
		if err := svc.SetStatus(c.Request.Context(), actorFromGin(c), id, body.Status); err != nil {
			response.Error(c, err)
			return
		}
		response.Success(c, gin.H{"id": id, "status": body.Status})
	}
}

func resetAccountPasswordHandler(svc *app.AccountService) gin.HandlerFunc {
	return func(c *gin.Context) {
		id, err := parseIDParam(c)
		if err != nil {
			response.Error(c, err)
			return
		}
		var body resetPasswordRequest
		if err := c.ShouldBindJSON(&body); err != nil {
			response.Error(c, response.ErrBadRequest(40000, "invalid_payload", err.Error()))
			return
		}
		if err := svc.ResetPassword(c.Request.Context(), actorFromGin(c), id, body.Password); err != nil {
			response.Error(c, err)
			return
		}
		response.Success(c, gin.H{"id": id})
	}
}

func changeOwnPasswordHandler(svc *app.AccountService) gin.HandlerFunc {
	return func(c *gin.Context) {
		var body changeOwnPasswordRequest
		if err := c.ShouldBindJSON(&body); err != nil {
			response.Error(c, response.ErrBadRequest(40000, "invalid_payload", err.Error()))
			return
		}
		if err := svc.ChangeOwnPassword(c.Request.Context(), actorFromGin(c), app.ChangeOwnPasswordInput{
			OldPassword: body.OldPassword,
			NewPassword: body.NewPassword,
		}); err != nil {
			response.Error(c, err)
			return
		}
		response.Success(c, gin.H{"ok": true})
	}
}

func parseIDParam(c *gin.Context) (int64, error) {
	idStr := c.Param("id")
	id, err := strconv.ParseInt(idStr, 10, 64)
	if err != nil || id <= 0 {
		return 0, response.ErrBadRequest(40001, "invalid_id", "无效的 ID")
	}
	return id, nil
}