package repository

import (
	"context"
	"gofaster/internal/auth/model"

	"gorm.io/gorm"
)

type UserRepository interface {
	Create(ctx context.Context, user *model.User) error
	GetByID(ctx context.Context, id uint) (*model.User, error)
	GetByUsername(ctx context.Context, username string) (*model.User, error)
	GetByEmail(ctx context.Context, email string) (*model.User, error)
	Update(ctx context.Context, user *model.User) error
	Delete(ctx context.Context, id uint) error
	List(ctx context.Context, offset, limit int) ([]*model.User, int64, error)

	// 登录相关方法
	IncrementPasswordError(ctx context.Context, userID uint) error
	ResetPasswordError(ctx context.Context, userID uint) error
	UpdateLastLogin(ctx context.Context, userID uint, ip string) error
	GetUserWithRoles(ctx context.Context, userID uint) (*model.User, error)
}

type userRepository struct {
	db *gorm.DB
}

func NewUserRepository(db *gorm.DB) UserRepository {
	return &userRepository{
		db: db,
	}
}

func (r *userRepository) Create(ctx context.Context, user *model.User) error {
	return r.db.WithContext(ctx).Create(user).Error
}

func (r *userRepository) GetByID(ctx context.Context, id uint) (*model.User, error) {
	var user model.User
	err := r.db.WithContext(ctx).First(&user, id).Error
	if err != nil {
		return nil, err
	}
	return &user, nil
}

func (r *userRepository) GetByUsername(ctx context.Context, username string) (*model.User, error) {
	var user model.User
	err := r.db.WithContext(ctx).Where("username = ?", username).First(&user).Error
	if err != nil {
		return nil, err
	}
	return &user, nil
}

func (r *userRepository) GetByEmail(ctx context.Context, email string) (*model.User, error) {
	var user model.User
	err := r.db.WithContext(ctx).Where("email = ?", email).First(&user).Error
	if err != nil {
		return nil, err
	}
	return &user, nil
}

func (r *userRepository) Update(ctx context.Context, user *model.User) error {
	return r.db.WithContext(ctx).Save(user).Error
}

func (r *userRepository) Delete(ctx context.Context, id uint) error {
	return r.db.WithContext(ctx).Delete(&model.User{}, id).Error
}

func (r *userRepository) List(ctx context.Context, offset, limit int) ([]*model.User, int64, error) {
	var users []*model.User
	var total int64

	err := r.db.WithContext(ctx).Model(&model.User{}).Count(&total).Error
	if err != nil {
		return nil, 0, err
	}

	err = r.db.WithContext(ctx).Offset(offset).Limit(limit).Find(&users).Error
	if err != nil {
		return nil, 0, err
	}

	return users, total, nil
}

// IncrementPasswordError 增加密码错误次数
func (r *userRepository) IncrementPasswordError(ctx context.Context, userID uint) error {
	return r.db.WithContext(ctx).Model(&model.User{}).
		Where("id = ?", userID).
		Updates(map[string]interface{}{
			"password_error_count": gorm.Expr("password_error_count + 1"),
		}).Error
}

// ResetPasswordError 重置密码错误次数
func (r *userRepository) ResetPasswordError(ctx context.Context, userID uint) error {
	return r.db.WithContext(ctx).Model(&model.User{}).
		Where("id = ?", userID).
		Updates(map[string]interface{}{
			"password_error_count": 0,
			"status":               1,
			"locked_at":            nil,
		}).Error
}

// UpdateLastLogin 更新最后登录信息
func (r *userRepository) UpdateLastLogin(ctx context.Context, userID uint, ip string) error {
	return r.db.WithContext(ctx).Model(&model.User{}).
		Where("id = ?", userID).
		Updates(map[string]interface{}{
			"last_login_at": gorm.Expr("NOW()"),
			"last_login_ip": ip,
		}).Error
}

// GetUserWithRoles 获取用户及其角色信息
func (r *userRepository) GetUserWithRoles(ctx context.Context, userID uint) (*model.User, error) {
	var user model.User
	err := r.db.WithContext(ctx).
		Preload("Roles").
		First(&user, userID).Error
	if err != nil {
		return nil, err
	}
	return &user, nil
}