package models

import (
	// "crypto/rand"
	"crypto/sha256"
	"fmt"
	"io"
	"time"
)

type User struct {
	ID        uint      `gorm:"primaryKey" json:"id"`
	Username  string    `gorm:"uniqueIndex;size:50" json:"username"`
	Email     string    `gorm:"uniqueIndex;size:100" json:"email"`
	Password  string    `gorm:"size:255" json:"-"`
	CreatedAt time.Time `json:"created_at"`
	UpdatedAt time.Time `json:"updated_at"`
}

// HashPassword 迁移到 utils 包更合适（可选）
func HashPassword(password string) ([]byte, error) {
	h := sha256.New()
	if _, err := io.WriteString(h, password); err != nil { // 修正[]byte转换
		return nil, err
	}
	return h.Sum(nil), nil
}

// Validate 建议移动到 service 层（可选）
func (u *User) Validate() error {
	if u.Password == "" {
		return fmt.Errorf("password cannot be empty")
	}
	return nil
}