package v1

import (
	"net/http"

	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/global"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/dto"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/middleware"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/internal/service"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/pkg/app"
	"git.lzcwy.cn/zhengchiliu/zt-closet-backend/pkg/errcode"
	"github.com/gin-gonic/gin"
)

// ClothesHandler 衣物相关接口。
type ClothesHandler struct {
	svc *service.ClothesService
}

// NewClothesHandler 创建衣物 handler。
func NewClothesHandler() *ClothesHandler {
	return &ClothesHandler{svc: service.NewClothesService()}
}

// Upload 上传衣物图片（multipart，字段名 file）。
func (h *ClothesHandler) Upload(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	// 解析 multipart 前限制请求体大小（MaxSizeMB + 1MB 的 multipart 边界开销），
	// 防止超大 body 在 FormFile 解析时耗尽内存/磁盘。
	maxBytes := int64(global.UploadSetting.MaxSizeMB)*1024*1024 + 1024*1024
	c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, maxBytes)
	fileHeader, err := c.FormFile("file")
	if err != nil {
		response.ToErrorResponse(errcode.UploadFileEmpty.WithDetails(err.Error()))
		return
	}
	out, e := h.svc.Upload(c.Request.Context(), userID, fileHeader)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// List 分页查询当前用户衣物。
func (h *ClothesHandler) List(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	var request dto.ClothesListRequest
	if err := c.ShouldBindQuery(&request); err != nil {
		response.ToErrorResponse(errcode.InvalidParams.WithDetails(err.Error()))
		return
	}
	out, e := h.svc.List(c.Request.Context(), userID, &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// Get 获取衣物详情（uuid 来自路径参数）。
func (h *ClothesHandler) Get(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	request := dto.ClothesGetByUUIDRequest{
		ClothesUUID: c.Param("uuid"),
		// 非属主只读查看的两个入口：穿搭分享（share_uuid）与社区公开穿搭（outfit_uuid）
		ShareUUID:  c.Query("share_uuid"),
		OutfitUUID: c.Query("outfit_uuid"),
	}
	if request.ClothesUUID == "" {
		response.ToErrorResponse(errcode.InvalidParams)
		return
	}
	out, e := h.svc.GetByUUID(c.Request.Context(), userID, &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// Status 查询衣物图片处理状态（uuid 来自路径参数）。
func (h *ClothesHandler) Status(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	request := dto.ClothesProcessStatusGetByUUIDRequest{ClothesUUID: c.Param("uuid")}
	if request.ClothesUUID == "" {
		response.ToErrorResponse(errcode.InvalidParams)
		return
	}
	out, e := h.svc.ProcessStatusGetByUUID(c.Request.Context(), userID, &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// Update 修改衣物属性（uuid 来自路径参数）。
func (h *ClothesHandler) Update(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	var request dto.ClothesUpdateByUUIDRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		response.ToErrorResponse(errcode.InvalidParams.WithDetails(err.Error()))
		return
	}
	request.ClothesUUID = c.Param("uuid")
	if request.ClothesUUID == "" {
		response.ToErrorResponse(errcode.InvalidParams)
		return
	}
	out, e := h.svc.UpdateByUUID(c.Request.Context(), userID, &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// Delete 删除衣物（uuid 来自路径参数）。
func (h *ClothesHandler) Delete(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	request := dto.ClothesDeleteByUUIDRequest{ClothesUUID: c.Param("uuid")}
	if request.ClothesUUID == "" {
		response.ToErrorResponse(errcode.InvalidParams)
		return
	}
	out, e := h.svc.DeleteByUUID(c.Request.Context(), userID, &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}