class State implements JsonSerializable, TransactionState
{

    const DEFERRED_AUTHORIZE = 'DeferredAuthorize';

    /**
     * Map of constant names and their corresponding values
     *
     * @var string[]
     */
    public static $stateMap = [
        'DEFERRED_AUTHORIZE' => self::DEFERRED_AUTHORIZE,
    ];

    /**
     * State to CSS class map
     *
     * @var string[]
     */
    private $cssClassMap = [
        self::DEFERRED_AUTHORIZE => 'card-back-ordered',
    ];

    /**
     * `statusDetails`'s `state` key value
     *
     * @var string
     */
    private $state;

    /**
     * `statusDetails`'s `reasonCode` key value
     *
     * @var string|null
     */
    private $reasonCode;

    /**
     * `statusDetails`'s `reasonDescription` key value
     *
     * @var string|null
     */
    private $reasonDescription;

    /**
     * Charge Permission ID
     *
     * @var string|null
     */
    private $chargePermissionId;

    /**
     * Initializes a DeferredAuthorize `State` object
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param string      $state
     * @param string|null $reasonCode
     * @param string|null $reasonDescription
     * @return void
     */
    public function __construct($state, $reasonCode = null, $reasonDescription = null) {
        $this->state = $state;
        $this->reasonCode = $reasonCode;
        $this->reasonDescription = $reasonDescription;
    }

    /**
     * Setter for `chargePermissionId`
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param string $chargePermissionId
     * @return void
     */
    public function setChargePermissionId($chargePermissionId) {
        $this->chargePermissionId = $chargePermissionId;
    }

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

    /**
     * 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::DEFERRED_AUTHORIZE:
                $text = __('Back-ordered', 'wcexaap');
                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] : '';
    }

    /**
     * Returns `false`
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return bool
     */
    public function isUnmodifiable() {
        return false;
    }

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

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

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

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

    /**
     * Returns JSON object when `json_encode` is invoked on an instance of this class
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return array
     */
    public function jsonSerialize() {
        return [
            'state' => $this->state,
            'reasonCode' => $this->reasonCode,
            'reasonDescription' => $this->reasonDescription,
        ];
    }
}