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<?php

namespace vendor\project\some\models;

/**
 * Class User
 */
final class User implements \Serializable
{
    const FIELD_USER_ID = 'userId';
    const FIELD_NAME = 'name';
    const FIELD_PASSWORD = 'password';

    /** @var int */
    private $userId;
    /** @var string */
    private $name;
    /** @var string */
    private $password;

    /**
     * User constructor
     *
     * @param string $userId
     * @param string $name
     * @param string $password
     */
    public function __construct($userId, $password, $name)
    {
        if (empty($userId)) {
            throw new \InvalidArgumentException('$userId MUST NOT be empty');
        }

        if (!is_int($userId)) {
            throw new \InvalidArgumentException('$userId MUST be int');
        }

        if ($userId < 0) {
            throw new \InvalidArgumentException('$userId MUST be more than 0');
        }

        if (empty($password)) {
            throw new \InvalidArgumentException('$password MUST NOT be empty');
        }

        if (!is_string($password)) {
            throw new \InvalidArgumentException('$password MUST be string');
        }

        if (mb_strlen($password) !== 32) {
            throw new \InvalidArgumentException('$password MUST have length 32');
        }

        if (empty($name)) {
            throw new \InvalidArgumentException('$name MUST NOT be empty');
        }

        if (!is_string($name)) {
            throw new \InvalidArgumentException('$name MUST be string');
        }

        $this->userId = $userId;
        $this->name = $name;
        $this->password = $password;
    }

    /**
     * @return string
     */
    public function getUserId()
    {
        return $this->userId;
    }

    /**
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * @return string
     */
    public function getPassword()
    {
        return $this->password;
    }

    /**
     * @return string
     */
    public function serialize()
    {
        return serialize(
            [
                self::FIELD_USER_ID => $this->getUserId(),
                self::FIELD_NAME => $this->getName(),
                self::FIELD_PASSWORD => $this->getPassword()
            ]
        );
    }

    /**
     * @param string $serialized
     *
     * @return string
     */
    public function unserialize($serialized)
    {
        if (!is_string($serialized)) {
            throw new \InvalidArgumentException('$serialized MUST be string');
        }
        
        $data = unserialize($serialized);
        if (
            !isset($data[self::FIELD_USER_ID]) ||
            !isset($data[self::FIELD_NAME]) ||
            !isset($data[self::FIELD_PASSWORD]) ||
            (count($data) !== 3)
        ) {
            throw new \InvalidArgumentException('Invalid serialized data');
        }

        return new self(
            $data[self::FIELD_USER_ID],
            $data[self::FIELD_NAME],
            $data[self::FIELD_PASSWORD]
        );
    }
}