package repository

import (
	"context"
	"fmt"
	"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 {
	// 使用Updates方法，只更新非零值字段，避免更新密码
	return r.db.WithContext(ctx).Model(user).Updates(map[string]interface{}{
		"username":              user.Username,
		"email":                 user.Email,
		"phone":                 user.Phone,
		"status":                user.Status,
		"password_error_count":  user.PasswordErrorCount,
		"locked_at":             user.LockedAt,
		"last_login_at":         user.LastLoginAt,
		"last_login_ip":         user.LastLoginIP,
		"password_changed_at":   user.PasswordChangedAt,
		"force_change_password": user.ForceChangePassword,
		"updated_at":            user.UpdatedAt,
	}).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

	// 添加调试日志
	fmt.Printf("🔍 [用户查询] 开始查询用户列表，offset=%d, limit=%d\n", offset, limit)

	err := r.db.WithContext(ctx).Model(&model.User{}).Count(&total).Error
	if err != nil {
		fmt.Printf("🔍 [用户查询] 统计总数失败: %v\n", err)
		return nil, 0, err
	}
	fmt.Printf("🔍 [用户查询] 数据库中共有 %d 条用户记录\n", total)

	err = r.db.WithContext(ctx).Offset(offset).Limit(limit).Find(&users).Error
	if err != nil {
		fmt.Printf("🔍 [用户查询] 查询用户列表失败: %v\n", err)
		return nil, 0, err
	}
	fmt.Printf("🔍 [用户查询] 查询到 %d 条用户记录\n", len(users))

	// 打印查询到的用户信息
	for i, user := range users {
		fmt.Printf("🔍 [用户查询] 用户 %d: ID=%d, Username=%s, Email=%s, Status=%d\n",
			i+1, user.ID, user.Username, user.Email, user.Status)
	}

	return users, total, nil
}

// IncrementPasswordError 增加密码错误次数
func (r *userRepository) IncrementPasswordError(ctx context.Context, userID uint) error {
	// 先获取当前用户信息
	var user model.User
	if err := r.db.WithContext(ctx).First(&user, userID).Error; err != nil {
		return err
	}

	// 增加错误次数
	user.PasswordErrorCount++

	// 如果达到5次错误，锁定账户
	if user.PasswordErrorCount >= 5 {
		user.Status = 3 // 设置为锁定状态
		now := r.db.NowFunc()
		user.LockedAt = &now
	}

	// 保存更新
	return r.db.WithContext(ctx).Save(&user).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").
		Preload("Roles.Permissions").
		First(&user, userID).Error
	if err != nil {
		return nil, err
	}
	return &user, nil
}