class ComboGroup implements JsonSerializable
{
    /**
     * Group ID
     *
     * @var int
     */
    private $id;

    /**
     * Combo-set ID
     *
     * @var int
     */
    private $comboSetId;

    /**
     * Group label
     *
     * @var string
     */
    private $label;

    /**
     * Optional flag
     *
     * @var bool
     */
    private $optional;

    /**
     * Multi-select flag
     *
     * @var bool
     */
    private $enableMultiSelect;

    /**
     * Position in the group list
     *
     * Lower means higher priority
     *
     * @var int
     */
    private $position;

    /**
     * Items in the group
     *
     * @var GroupItem[]
     */
    private $items;

    /**
     * Created at UTC `DATETIME` string
     *
     * @var string
     */
    private $createdAt;

    /**
     * Updated at UTC `DATETIME` string
     *
     * @var string
     */
    private $updatedAt;

    /**
     * Constructs a combo group
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @param int         $id
     * @param int         $comboSetId
     * @param string      $label
     * @param bool        $optional
     * @param bool        $enableMultiSelect
     * @param int         $position
     * @param GroupItem[] $items
     * @param string      $createdAt
     * @param string      $updatedAt
     * @return void
     */
    public function __construct($id, $comboSetId, $label, $optional, $enableMultiSelect, $position, $items, $createdAt, $updatedAt) {
        $this->id = (int)$id;
        $this->comboSetId = (int)$comboSetId;
        $this->label = (string)$label;
        $this->optional = (bool)$optional;
        $this->enableMultiSelect = (bool)$enableMultiSelect;
        $this->position = (int)$position;
        $this->items = is_array($items) ? $items : [];
        $this->createdAt = $createdAt;
        $this->updatedAt = $updatedAt;
    }

    /**
     * Returns key-value representation of the object
     *
     * @author Evan D Shaw <evandanielshaw@gmail.com>
     * @return array
     */
    public function jsonSerialize() {
        return [
            'id' => $this->id,
            'comboSetId' => $this->comboSetId,
            'label' => $this->label,
            'optional' => $this->optional,
            'enableMultiSelect' => $this->enableMultiSelect,
            'position' => $this->position,
            'items' => $this->items,
            'createdAt' => $this->createdAt,
            'updatedAt' => $this->updatedAt,
        ];
    }

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

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

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

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

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

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

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

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

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