package menu

import (
	"slices"
	"strings"
	"wechat-robot/internal/database"
	"wechat-robot/model/vo/menu"
	"wechat-robot/pkg/types"
	"wechat-robot/service/role"
)

type menuRecordItem struct {
	Id       string
	Type     types.MenuType
	Name     string
	Path     string
	Title    string
	Icon     string
	Sort     int
	ParentId *string
	RoleCode string
	AuthCode string
}

// GetUserMenus
// @description: 获取用户权限内的菜单列表
// @param userId string 用户Id
// @return records []entity.Menu 菜单列表
// @return err error 错误信息
func GetUserMenus(userId string) (records []menu.Item, err error) {
	// 检查是否是超级管理员用户
	isSuperAdminUser := role.CheckIsSuperAdminUser(userId)

	// 取出用户包含的所有菜单
	var menus []menuRecordItem
	tx := database.Client.Table("t_menu AS tm").
		Joins("LEFT JOIN t_role_menu AS trm ON trm.menu_id = tm.id").
		Joins("LEFT JOIN t_role AS tr ON tr.id = trm.role_id AND tr.is_del IS FALSE").
		Select("tm.*", "tr.code AS role_code").
		Where("tm.is_del IS FALSE")
	if !isSuperAdminUser {
		// 不是超级管理员，只能获取自己的菜单
		tx.Joins("LEFT JOIN t_admin_user_role AS tur ON tur.role_id = tr.id").
			Where("tur.user_id = ?", userId)
	}
	err = tx.Find(&menus).Error
	if err != nil {
		return
	}
	if len(menus) == 0 {
		records = make([]menu.Item, 0)
		return
	}

	// 处理出菜单Id对应的角色代码，然后去重
	var items []menuRecordItem
	roleCodesMap := make(map[string][]string) // key: menuId, value: roleCode Array
	authMap := make(map[string][]string)      // key: menuId, value: 类型为按钮的path
	for _, m := range menus {
		if _, ok := roleCodesMap[m.Id]; !ok {
			if m.RoleCode != "" {
				roleCodesMap[m.Id] = []string{m.RoleCode}
			}
			// 将菜单填充到items里
			if m.Type == types.MenuTypeMenu {
				items = append(items, m)
			}
		} else {
			roleCodesMap[m.Id] = append(roleCodesMap[m.Id], m.RoleCode)
		}

		// 如果是按钮，且有父级，就把按钮的path放到父级的authMap里
		if m.Type == types.MenuTypeButton && m.ParentId != nil {
			authMap[*m.ParentId] = append(authMap[*m.ParentId], m.Path)
		}
	}
	// 再次循环数据，把角色代码们拼接起来
	for i, m := range items {
		roleCodes := roleCodesMap[m.Id]
		authCodes := authMap[m.Id]
		if isSuperAdminUser {
			// 固定填充一个admin角色代码进去
			roleCodes = append(roleCodes, "admin")
		}

		items[i].RoleCode = strings.Join(slices.Compact(roleCodes), ",")
		items[i].AuthCode = strings.Join(slices.Compact(authCodes), ",")
	}

	// 处理成树形结构
	records = toTree(items, "")
	return
}