package handler

import (
	"errors"
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"

	"wx_service/internal/marketing/repository"
	"wx_service/internal/marketing/service"
	"wx_service/internal/middleware"
	"wx_service/internal/model"
)

type UserLogoHandler struct {
	svc *service.UserLogoService
}

func NewUserLogoHandler(svc *service.UserLogoService) *UserLogoHandler {
	return &UserLogoHandler{svc: svc}
}

func (h *UserLogoHandler) List(c *gin.Context) {
	user := middleware.MustCurrentUser(c)
	logos, err := h.svc.List(user.ID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Error(http.StatusInternalServerError, "获取 Logo 列表失败"))
		return
	}
	c.JSON(http.StatusOK, model.Success(logos))
}

func (h *UserLogoHandler) Save(c *gin.Context) {
	user := middleware.MustCurrentUser(c)

	var req service.SaveLogoRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "请求参数错误"))
		return
	}

	logo, err := h.svc.Save(user.ID, req)
	if err != nil {
		if errors.Is(err, service.ErrLogoLimitReached) || errors.Is(err, service.ErrLogoTooLarge) {
			c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, err.Error()))
			return
		}
		c.JSON(http.StatusInternalServerError, model.Error(http.StatusInternalServerError, "保存 Logo 失败"))
		return
	}
	c.JSON(http.StatusOK, model.Success(logo))
}

func (h *UserLogoHandler) Delete(c *gin.Context) {
	user := middleware.MustCurrentUser(c)

	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil || id == 0 {
		c.JSON(http.StatusBadRequest, model.Error(http.StatusBadRequest, "无效的 ID"))
		return
	}

	if err := h.svc.Delete(uint(id), user.ID); err != nil {
		if errors.Is(err, repository.ErrUserLogoNotFound) {
			c.JSON(http.StatusNotFound, model.Error(http.StatusNotFound, "Logo 不存在"))
			return
		}
		c.JSON(http.StatusInternalServerError, model.Error(http.StatusInternalServerError, "删除失败"))
		return
	}
	c.JSON(http.StatusOK, model.Success(nil))
}