package user

import (
	"errors"
	"time"
)

var (
	ErrInvalidPassword   = errors.New("密码不正确")
	ErrPasswordTooShort  = errors.New("密码长度不能小于6位")
	ErrInvalidPhone      = errors.New("手机号格式不正确")
	ErrInvalidVerifyCode = errors.New("验证码不正确")
	ErrVerifyCodeExpired = errors.New("验证码已过期")
	ErrPhoneNotMatch     = errors.New("手机号与用户不匹配")
)

const (
	VerifyCodeKeyPrefix  = "sms:verify:code:" // Redis中验证码的key前缀
	VerifyCodeExpiration = 5 * time.Minute    // 验证码有效期5分钟
	MinPasswordLength    = 6                  // 密码最小长度
	SaltLength           = 16                 // 盐值长度
)

// User 用户聚合根
type User struct {
	Id       uint64 `xorm:"pk autoincr 'id'" `
	Username string `xorm:"varchar(50) notnull unique 'username'"`
	Phone    string `xorm:"varchar(60) unique 'phone'" `
	// 密码相关
	Password string `xorm:"varchar(60) notnull 'password'" ` // 使用 bcrypt 加密存储，长度60
	Salt     string `xorm:"varchar(32) notnull 'salt'" `     // 密码加密盐值
	// 状态相关
	Status int8 `xorm:"tinyint(1) default 1 'status'" `
	// 登录相关
	LastLoginTime *time.Time `xorm:"datetime 'last_login_time'" `
	LastLoginIp   string     `xorm:"varchar(50) 'last_login_ip'"`
	GiftCount     int8       //赠送次数
	// 时间相关
	CreatedAt time.Time `xorm:"datetime created 'created_at'" `
	UpdatedAt time.Time `xorm:"datetime updated 'updated_at'"`
	DeletedAt time.Time `xorm:"datetime deleted 'deleted_at'" `
}

type userConfiguration func(u *User)
type userConfigurations []userConfiguration

// WithUsername 设置用户名
func WithUsername(username string) userConfiguration {
	return func(u *User) {
		u.Username = username
	}
}

// WithPhone 设置手机号
func WithPhone(phone string) userConfiguration {
	return func(u *User) {
		u.Phone = phone
	}
}

// NewUser 创建新用户（聚合根的工厂方法）
func NewUser(username, phone string, configs ...userConfiguration) *User {
	user := &User{
		Username: username,
		Phone:    phone,
		Status:   1,
	}

	userConfigurations(configs).apply(user)
	return user
}

func (cfg userConfigurations) apply(user *User) {
	for _, c := range cfg {
		c(user)
	}
}

// GetUsername 实现UserDetails接口
func (u *User) GetUsername() string {
	return u.Username
}

// GetPassword 获取加密后的密码（实现UserDetails接口）
func (u *User) GetPassword() string {
	return u.Password
}

// IsEnabled 判断用户是否启用
func (u *User) IsEnabled() bool {
	return u.Status == 1
}

// GetPhone 获取手机号
func (u *User) GetPhone() string {
	return u.Phone
}