package entities

import "time"

// User represents a registered user
type User struct {
	ID        int       `json:"id" db:"id"`
	Username  string    `json:"username" db:"username"`
	Email     string    `json:"email" db:"email"`
	Password  string    `json:"-" db:"password"` // Hidden from JSON
	CreatedAt time.Time `json:"created_at" db:"created_at"`
	UpdatedAt time.Time `json:"updated_at" db:"updated_at"`
}

// Validate validates user data
func (u *User) Validate() error {
	if u.Username == "" {
		return ErrInvalidUsername
	}
	if u.Email == "" {
		return ErrInvalidEmail
	}
	if u.Password == "" {
		return ErrInvalidPassword
	}
	return nil
}

// ClearPassword removes password from user for safe serialization
func (u *User) ClearPassword() {
	u.Password = ""
}