package service

import (
	"time"

	"chat-room/dao/pool"
	"chat-room/errors"
	"chat-room/global/log"
	"chat-room/model"
	"chat-room/model/request"

	"github.com/google/uuid"
)

type userService struct {
}

var UserService = new(userService)

func (u *userService) Register(user *model.User) error {
	db := pool.GetDB()
	var userCount int64
	db.Model(user).Where("username", user.Username).Count(&userCount)
	if userCount > 0 {
		return errors.New("user already exists")
	}
	user.Uuid = uuid.New().String()
	user.CreateAt = time.Now()
	user.DeleteAt = 0

	db.Create(&user)
	return nil
}

func (u *userService) Login(user *model.User) bool {
	pool.GetDB().AutoMigrate(&user)
	log.Debug("user", log.Any("user in service", user))
	db := pool.GetDB()

	var queryUser *model.User
	db.First(&queryUser, "username = ?", user.Username)
	log.Debug("queryUser", log.Any("queryUser", queryUser))

	user.Uuid = queryUser.Uuid

	return queryUser.Password == user.Password
}

func (u *userService) ModifyUserInfo(user *model.User) error {
	var queryUser *model.User
	db := pool.GetDB()
	db.First(&queryUser, "username = ?", user.Username)
	log.Debug("queryUser", log.Any("queryUser", queryUser))
	var nullId int32 = 0
	if nullId == queryUser.Id {
		return errors.New("用户不存在")
	}
	queryUser.Nickname = user.Nickname
	queryUser.Email = user.Email
	queryUser.Password = user.Password

	db.Save(queryUser)
	return nil
}

func (u *userService) GetUserDetails(uuid string) model.User {
	var queryUser *model.User
	db := pool.GetDB()
	db.Select("uuid", "username", "nickname", "avatar").First(&queryUser, "uuid = ?", uuid)
	return *queryUser
}

func (u *userService) GetUserList(uuid string) []model.User {
	db := pool.GetDB()

	var queryUser *model.User
	db.First(&queryUser, "uuid = ?", uuid)
	var nullId int32 = 0
	if nullId == queryUser.Id {
		return nil
	}

	var queryUsers []model.User
	db.Raw("SELECT u.username, u.uuid, u.avatar FROM user_friends AS uf JOIN users AS u ON uf.friend_id = u.id WHERE uf.user_id = ?", queryUser.Id).Scan(&queryUsers)

	return queryUsers
}

func (u *userService) AddFriend(userFriendRequest *request.FriendRequest) error {
	var queryUser *model.User
	db := pool.GetDB()
	db.First(&queryUser, "uuid = ?", userFriendRequest.Uuid)
	log.Debug("queryUser", log.Any("queryUser", queryUser))
	var nullId int32 = 0
	if nullId == queryUser.Id {
		return errors.New("用户不存在")
	}

	var friend *model.User
	db.First(&friend, "username = ?", userFriendRequest.FriendUsername)
	if nullId == friend.Id {
		return errors.New("已添加该好友")
	}

	userFriend := model.UserFriend{
		UserId:   queryUser.Id,
		FriendId: friend.Id,
	}

	var userFriendQuery *model.UserFriend
	db.First(&userFriendQuery, "user_id = ? and friend_id = ?", queryUser.Id, friend.Id)
	if userFriendQuery.ID != nullId {
		return errors.New("该用户已经是你好友")
	}

	db.AutoMigrate(&userFriend)
	db.Save(&userFriend)
	log.Debug("userFriend", log.Any("userFriend", userFriend))

	return nil
}