class TransactionState implements TState, JsonSerializable
{
    const AUTHORIZED = 'authorized';
    const CAPTURED = 'captured';
    const CANCELED = 'canceled';
    const REFUNDED = 'refunded';
    const EXPIRED = 'expired';

    /**
     * State to CSS class map
     *
     * @var string[]
     */
    private $cssClassMap = [
        self::AUTHORIZED => 'card-auth',
        self::CAPTURED => 'card-gathering',
        self::CANCELED => 'card-delete',
        self::REFUNDED => 'card-refunded',
        self::EXPIRED => 'card-expired',
    ];

    /**
     * LINE Pay transaction ID
     *
     * @var string
     */
    private $transactionId;

    /**
     * Transaction state key string
     *
     * Should be one of:
     * - `authorized`
     * - `captured`
     * - `canceled`
     * - `refunded`
     * - `expired`
     *
     * @var string
     */
    private $state;

    /**
     * Initializes LINE Pay transaction state object
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param string $transactionId
     * @param string $state
     * @return void
     */
    public function __construct($transactionId, $state) {
        $this->transactionId = $transactionId;
        $this->state = $state;
    }

    /**
     * Returns array for `json_encode`
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return array
     */
    public function jsonSerialize() {
        return [
            'transactionId' => $this->transactionId,
            'state' => $this->state,
            'displayText' => $this->getDisplayText(),
            'cssClass' => $this->getCssClass(),
        ];
    }

    /**
     * Returns human-readable text representation of current state
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return string
     */
    public function getDisplayText() {
        $text = '';
        switch ($this->state) {
            case self::AUTHORIZED:
                $text = __('AUTHORIZE', 'usces');
                break;
            case self::CAPTURED:
                $text = __('CAPTURE', 'usces');
                break;
            case self::CANCELED:
                $text = __('Canceled', 'wcex_linepay');
                break;
            case self::REFUNDED:
                $text = __('REFUNDED', 'usces');
                break;
            case self::EXPIRED:
                $text = __('Expired', 'wcex_linepay');
                break;
        }

        return $text;
    }

    /**
     * Returns CSS class for the current state
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return string
     */
    public function getCssClass() {
        return isset($this->cssClassMap[$this->state]) ? $this->cssClassMap[$this->state] : '';
    }

    /**
     * Getter for `state` key string
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return string
     */
    public function getState() {
        return $this->state;
    }

    /**
     * Getter for LINE Pay transaction ID
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return string
     */
    public function getTransactionId() {
        return $this->transactionId;
    }
}