package entities

import (
	"time"

	"gorm.io/gorm"
)

// User 用户实体
type User struct {
	ID        string         `gorm:"primaryKey;type:varchar(36)" json:"id"`
	Phone     string         `gorm:"uniqueIndex;type:varchar(20);not null" json:"phone"`
	Password  string         `gorm:"type:varchar(255);not null" json:"-"`
	CreatedAt time.Time      `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt time.Time      `gorm:"autoUpdateTime" json:"updated_at"`
	DeletedAt gorm.DeletedAt `gorm:"index" json:"-"`
}

// 实现 Entity 接口
func (u *User) GetID() string {
	return u.ID
}

func (u *User) GetCreatedAt() time.Time {
	return u.CreatedAt
}

func (u *User) GetUpdatedAt() time.Time {
	return u.UpdatedAt
}

// 验证方法
func (u *User) Validate() error {
	if u.Phone == "" {
		return NewValidationError("手机号不能为空")
	}
	if u.Password == "" {
		return NewValidationError("密码不能为空")
	}
	return nil
}

// TableName 指定表名
func (User) TableName() string {
	return "users"
}

// ValidationError 验证错误
type ValidationError struct {
	Message string
}

func (e *ValidationError) Error() string {
	return e.Message
}

func NewValidationError(message string) *ValidationError {
	return &ValidationError{Message: message}
}