package repository

import (
	"fmt"
	"github.com/pkg/errors"
	"gorm.io/gorm"
	"sghgogs.com/micro/shopping-service/domain/model/base"
	req "sghgogs.com/micro/shopping-service/domain/model/request"
	pb "sghgogs.com/micro/shopping-service/proto"
	"sghgogs.com/micro/shopping-service/utils"
)

const (
	UserGroupID = 2
)

func (u *Repository) IsUserExists(identifier interface{}) (bool, error) {
	var user req.User
	if err := u.db.
		Where("id = ? OR username = ?", identifier, identifier).
		Where("group_id", utils.UserUserGroupID).
		Select("id, username").
		First(&user).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return false, nil // 记录不存在，账号不存在
		}
		return false, err // 发生其他错误
	}
	return true, nil
}

func (u *Repository) GetUserList(query *pb.GetUserListRequest) ([]req.User, int64, error) {
	tx := u.db.Model(&req.User{}).
		Where("group_id = ?", utils.UserUserGroupID).
		Select("id, username, phone_number, email, avatar, created_at, created_by, updated_at, updated_by, status").
		Order("id desc")
	if query.Keyword != "" {
		tx.Where("username = ? OR phone_number = ?", query.Keyword, query.Keyword)
	}
	if base.IsStatusEnum(query.Status) {
		tx.Where("status = ?", query.Status)
	}
	var totalCount int64
	tx.Count(&totalCount)
	users := make([]req.User, 0)
	return users, totalCount, tx.Limit(int(query.PageSize)).Offset(int((query.Page - 1) * query.PageSize)).Find(&users).Error
}

func (u *Repository) GetUser(userID int64) (req.User, error) {
	var user req.User
	return user, u.db.
		Where("id = ? AND group_id = ?", userID, utils.UserUserGroupID).
		Select("id, username, phone_number, email, avatar, created_at, created_by, updated_at, updated_by, status").
		// Preload("Roles").
		Find(&user).Error
}

func (u *Repository) CreateUser(user *req.User) error {
	// 开始事务
	tx := u.db.Begin()
	// 错误处理
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	if err := tx.Model(&req.User{}).Create(user).Error; err != nil {
		tx.Rollback()
		return err
	}
	var role req.Role
	if err := tx.Model(&req.Role{}).Where("name = ?", "user").First(&role).Error; err != nil {
		tx.Rollback()
		return err
	}
	if err := tx.Model(&user).Association("Roles").Append(&req.Role{ID: role.ID}); err != nil {
		tx.Rollback()
		return err
	}
	return tx.Commit().Error
}

func (u *Repository) UpdateUser(userID int64, user map[string]interface{}) error {
	// 开始事务
	tx := u.db.Begin()
	// 错误处理
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	if err := tx.Model(&req.User{}).Where("id = ?", userID).Updates(user).Error; err != nil {
		tx.Rollback()
		return err
	}
	return tx.Commit().Error
}

func (u *Repository) DeleteUser(userID int64) error {
	// 开始事务
	tx := u.db.Begin()
	// 错误处理
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	var user req.User
	if err := tx.First(&user, userID).Error; err != nil {
		tx.Rollback()
		return err
	}
	if err := tx.Model(&user).Association("Roles").Clear(); err != nil {
		tx.Rollback()
		return err
	}
	if err := tx.Model(&req.User{}).Unscoped().Delete(&req.User{ID: userID}).Error; err != nil {
		tx.Rollback()
		return err
	}
	return tx.Commit().Error
}

func (u *Repository) ToggleUser(userID int64, enum pb.StatusEnum, data map[string]interface{}) error {
	// pb.StatusEnum_DELETED {}
	fmt.Println("data", data)
	// 1. 开启事务
	tx := u.db.Begin()
	// 错误处理
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()
	var user req.User
	// 1.查询角色
	if err := tx.First(&user, userID).Error; err != nil {
		tx.Rollback()
		return err
	}
	if enum == pb.StatusEnum_DELETED {
		// 1.1删除关联角色
		if err := tx.Model(&user).Association("Roles").Clear(); err != nil {
			tx.Rollback()
			return err
		}
	}
	// 2. 更新状态
	if err := tx.Model(&req.User{}).Where("id = ?", userID).Updates(data).Error; err != nil {
		tx.Rollback()
		return err
	}
	return tx.Commit().Error
}

// func (u *Repository) ToggleUser(userID int64, user map[string]interface{}) error {
// 	// 开始事务
// 	tx := u.db.Begin()
// 	// 错误处理
// 	defer func() {
// 		if r := recover(); r != nil {
// 			tx.Rollback()
// 		}
// 	}()
// 	if err := tx.Model(&req.User{}).Where("id = ?", userID).Updates(&user).Error; err != nil {
// 		tx.Rollback()
// 		return err
// 	}
// 	return tx.Commit().Error
// }
//
// func (u *Repository) DeleteUser(userID int64) error {
// 	// 开始事务
// 	tx := u.db.Begin()
// 	// 错误处理
// 	defer func() {
// 		if r := recover(); r != nil {
// 			tx.Rollback()
// 		}
// 	}()
// 	var user req.User
// 	if err := tx.First(&user, userID).Error; err != nil {
// 		tx.Rollback()
// 		return err
// 	}
// 	if err := tx.Model(&user).Association("Roles").Clear(); err != nil {
// 		tx.Rollback()
// 		return err
// 	}
// 	if err := tx.Model(&req.User{}).Delete(&req.User{
// 		ID: userID,
// 	}).Error; err != nil {
// 		tx.Rollback()
// 		return err
// 	}
// 	return tx.Commit().Error
// }

// 检测用户ID如果不存在会抛出错误
func (u *Repository) getUserValidIDs(ids []int64) ([]int64, error) {
	var validIDs []int64
	result := u.db.Model(&req.User{}).Where("id IN ?", ids).Pluck("id", &validIDs)
	if result.Error != nil {
		return nil, result.Error
	}
	// 检查是否有未找到的 ID
	if result.RowsAffected != int64(len(ids)) {
		// 找到的 ID 数量和传入的数量不一致，说明有不存在的 ID
		missingIDs := findMissingIDs(ids, validIDs)
		errMsg := fmt.Sprintf("Some IDs do not exist: %v", missingIDs)
		return nil, errors.New(errMsg)
	}
	return validIDs, nil
}

func findMissingIDs(allIDs, foundIDs []int64) []int64 {
	var missingIDs []int64
	foundSet := make(map[int64]bool)
	for _, id := range foundIDs {
		foundSet[id] = true
	}
	for _, id := range allIDs {
		if !foundSet[id] {
			missingIDs = append(missingIDs, id)
		}
	}
	return missingIDs
}