// Package v1 提供 /api/v1 版本的 HTTP handler，负责请求绑定、鉴权透传与统一响应，
// 业务逻辑与归属校验均在 internal/service 层完成。
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"
)

// UserHandler 用户相关接口。
type UserHandler struct {
	svc *service.UserService
}

// NewUserHandler 创建用户 handler。
func NewUserHandler() *UserHandler {
	return &UserHandler{svc: service.NewUserService()}
}

// WxLogin 微信登录（公开）。
func (h *UserHandler) WxLogin(c *gin.Context) {
	response := app.NewResponse(c)
	var request dto.UserWxLoginRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		response.ToErrorResponse(errcode.InvalidParams.WithDetails(err.Error()))
		return
	}
	out, e := h.svc.WxLogin(c.Request.Context(), &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// RefreshToken 刷新访问令牌（公开）。
func (h *UserHandler) RefreshToken(c *gin.Context) {
	response := app.NewResponse(c)
	var request dto.UserRefreshTokenRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		response.ToErrorResponse(errcode.InvalidParams.WithDetails(err.Error()))
		return
	}
	out, e := h.svc.RefreshToken(c.Request.Context(), &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// InfoGetBySelf 获取当前用户信息。
func (h *UserHandler) InfoGetBySelf(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	out, e := h.svc.InfoGetBySelf(c.Request.Context(), userID)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// ProfileUpdate 修改当前用户资料。
func (h *UserHandler) ProfileUpdate(c *gin.Context) {
	response := app.NewResponse(c)
	userID, ok := middleware.GetUserID(c.Request.Context())
	if !ok {
		response.ToErrorResponse(errcode.Unauthorized)
		return
	}
	var request dto.UserProfileUpdateBySelfRequest
	if err := c.ShouldBindJSON(&request); err != nil {
		response.ToErrorResponse(errcode.InvalidParams.WithDetails(err.Error()))
		return
	}
	out, e := h.svc.ProfileUpdate(c.Request.Context(), userID, &request)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}

// AvatarUpload 上传用户头像（multipart，字段名 file）。
func (h *UserHandler) AvatarUpload(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.AvatarUpload(c.Request.Context(), userID, fileHeader)
	if e != nil {
		response.ToErrorResponse(e)
		return
	}
	response.ToResponse(out)
}