package handler

import (
	"photowall/internal/middleware"
	"photowall/internal/model"
	"photowall/internal/service"
	"photowall/pkg/response"
	"strconv"
	"strings"

	"github.com/gin-gonic/gin"
)

type MenuHandler struct {
	menu *service.MenuService
}

func NewMenuHandler(menu *service.MenuService) *MenuHandler {
	return &MenuHandler{menu: menu}
}

// GetUserMenus GET /api/menus 获取当前用户的菜单树（动态路由用）
func (h *MenuHandler) GetUserMenus(c *gin.Context) {
	isAdmin := middleware.CurrentRole(c) == "admin"
	tree, err := h.menu.GetMenuTree(isAdmin)
	if err != nil {
		response.Internal(c, "获取菜单失败")
		return
	}
	response.OK(c, tree)
}

// GetAll GET /api/admin/menus 获取所有菜单树结构（管理用）
func (h *MenuHandler) GetAll(c *gin.Context) {
	tree, err := h.menu.GetAllTree()
	if err != nil {
		response.Internal(c, "获取菜单失败: "+err.Error())
		return
	}
	response.OK(c, tree)
}

// Create POST /api/admin/menus 创建菜单
func (h *MenuHandler) Create(c *gin.Context) {
	var m model.Menu
	if err := c.ShouldBindJSON(&m); err != nil {
		response.BadRequest(c, "参数错误："+err.Error())
		return
	}
	if strings.TrimSpace(m.Name) == "" {
		response.BadRequest(c, "路由名称(name)不能为空")
		return
	}
	if strings.TrimSpace(m.Title) == "" {
		response.BadRequest(c, "菜单标题(title)不能为空")
		return
	}
	if err := h.menu.Create(&m); err != nil {
		response.Internal(c, "创建菜单失败: "+err.Error())
		return
	}
	response.Created(c, m)
}

// Update PUT /api/admin/menus/:id 更新菜单（支持全量或部分字段更新）
func (h *MenuHandler) Update(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil || id == 0 {
		response.BadRequest(c, "无效的菜单ID")
		return
	}
	var body map[string]interface{}
	if err := c.ShouldBindJSON(&body); err != nil {
		response.BadRequest(c, "参数错误："+err.Error())
		return
	}
	// 兼容 sort / sort_order
	if v, ok := body["sort_order"]; ok {
		body["sort"] = v
		delete(body, "sort_order")
	}
	delete(body, "id")
	delete(body, "children") // 过滤可能携带的子项数组，避免 GORM 尝试保存未知列
	delete(body, "created_at")
	delete(body, "updated_at")

	if err := h.menu.UpdateFields(uint(id), body); err != nil {
		response.Internal(c, "更新菜单失败: "+err.Error())
		return
	}
	response.OK(c, gin.H{"message": "更新成功"})
}

// Delete DELETE /api/admin/menus/:id 删除菜单
func (h *MenuHandler) Delete(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))
	if id == 0 {
		response.BadRequest(c, "无效的菜单ID")
		return
	}
	if err := h.menu.Delete(uint(id)); err != nil {
		response.Internal(c, "删除菜单失败: "+err.Error())
		return
	}
	response.OK(c, gin.H{"message": "删除成功"})
}