package entities

import (
	"autostore/internal/domain/value_objects"

	"golang.org/x/crypto/bcrypt"
)

type UserEntity struct {
	id           value_objects.UserID
	username     string
	passwordHash string
}

func NewUser(id value_objects.UserID, username string, password string) (*UserEntity, error) {
	if username == "" {
		return nil, ErrInvalidUsername
	}

	if password == "" {
		return nil, ErrInvalidPassword
	}

	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
	if err != nil {
		return nil, ErrFailedToHashPassword
	}

	return &UserEntity{
		id:           id,
		username:     username,
		passwordHash: string(hashedPassword),
	}, nil
}

// NewUserWithHashedPassword creates a user entity with a pre-hashed password
// This is used when reconstructing a user from the database
func NewUserWithHashedPassword(id value_objects.UserID, username string, passwordHash string) (*UserEntity, error) {
	if username == "" {
		return nil, ErrInvalidUsername
	}

	if passwordHash == "" {
		return nil, ErrInvalidPassword
	}

	return &UserEntity{
		id:           id,
		username:     username,
		passwordHash: passwordHash,
	}, nil
}

func (u *UserEntity) GetID() value_objects.UserID {
	return u.id
}

func (u *UserEntity) GetUsername() string {
	return u.username
}

func (u *UserEntity) GetPasswordHash() string {
	return u.passwordHash
}

func (u *UserEntity) ValidatePassword(password string) bool {
	err := bcrypt.CompareHashAndPassword([]byte(u.passwordHash), []byte(password))
	return err == nil
}