<?php

declare(strict_types=1);

namespace OCA\WorkflowDeckAutomation\Db;

use OCP\AppFramework\Db\Entity;
use OCP\DB\Types;

/**
 * @method string getUserId()
 * @method void setUserId(string $userId)
 * @method string getTitle()
 * @method void setTitle(string $title)
 * @method int getBoardId()
 * @method void setBoardId(int $boardId)
 * @method int getSourceStackId()
 * @method void setSourceStackId(int $sourceStackId)
 * @method int getTargetStackId()
 * @method void setTargetStackId(int $targetStackId)
 * @method string|null getFilterUserIds()
 * @method void setFilterUserIds(?string $filterUserIds)
 * @method string|null getFilterLabelIds()
 * @method void setFilterLabelIds(?string $filterLabelIds)
 * @method string|null getDateField()
 * @method void setDateField(string $dateField)
 * @method bool getNotifyEmail()
 * @method void setNotifyEmail(bool $notifyEmail)
 * @method bool getEnabled()
 * @method void setEnabled(bool $enabled)
 * @method \DateTime|null getLastRun()
 * @method void setLastRun(?\DateTime $lastRun)
 */
class Workflow extends Entity implements \JsonSerializable {
	/** Deck's `Card::$duedate` — the card is picked up once it is overdue. */
	public const DATE_FIELD_DUE = 'due';

	/** Deck's `Card::$startdate` — the card is picked up once its start date has been reached. */
	public const DATE_FIELD_START = 'start';

	public const DATE_FIELDS = [self::DATE_FIELD_DUE, self::DATE_FIELD_START];

	protected $userId;
	protected $title;
	protected $boardId;
	protected $sourceStackId;
	protected $targetStackId;
	protected $filterUserIds;
	protected $filterLabelIds;
	protected $dateField;
	protected $notifyEmail;
	protected $enabled;
	protected $lastRun;

	public function __construct() {
		$this->addType('id', Types::INTEGER);
		$this->addType('userId', Types::STRING);
		$this->addType('title', Types::STRING);
		$this->addType('boardId', Types::INTEGER);
		$this->addType('sourceStackId', Types::INTEGER);
		$this->addType('targetStackId', Types::INTEGER);
		$this->addType('filterUserIds', Types::STRING);
		$this->addType('filterLabelIds', Types::STRING);
		$this->addType('dateField', Types::STRING);
		$this->addType('notifyEmail', Types::BOOLEAN);
		$this->addType('enabled', Types::BOOLEAN);
		$this->addType('lastRun', Types::DATETIME);
	}

	/**
	 * The date field to evaluate, never anything else.
	 *
	 * Rows written before the column existed carry 'due' from the schema
	 * default, but a freshly constructed entity holds `null` and a hand-edited
	 * row could hold anything. Falling back to the due date keeps the old
	 * behaviour for every value that is not explicitly the start date — the
	 * safe direction, since 'due' is what every workflow meant before this
	 * choice existed.
	 *
	 * @return self::DATE_FIELD_*
	 */
	public function getDateFieldOrDue(): string {
		$field = $this->getDateField();
		return in_array($field, self::DATE_FIELDS, true) ? $field : self::DATE_FIELD_DUE;
	}

	/**
	 * @return string[]
	 */
	public function getFilterUserIdsArray(): array {
		return $this->decodeIds($this->getFilterUserIds());
	}

	/**
	 * @return int[]
	 */
	public function getFilterLabelIdsArray(): array {
		return array_map('intval', $this->decodeIds($this->getFilterLabelIds()));
	}

	/**
	 * @return string[]
	 */
	private function decodeIds(?string $json): array {
		if ($json === null || $json === '') {
			return [];
		}
		$decoded = json_decode($json, true);
		return is_array($decoded) ? array_values($decoded) : [];
	}

	public function jsonSerialize(): array {
		return [
			'id' => $this->getId(),
			'userId' => $this->getUserId(),
			'title' => $this->getTitle(),
			'boardId' => $this->getBoardId(),
			'sourceStackId' => $this->getSourceStackId(),
			'targetStackId' => $this->getTargetStackId(),
			'filterUserIds' => $this->getFilterUserIdsArray(),
			'filterLabelIds' => $this->getFilterLabelIdsArray(),
			'dateField' => $this->getDateFieldOrDue(),
			'notifyEmail' => (bool)$this->getNotifyEmail(),
			'enabled' => (bool)$this->getEnabled(),
			'lastRun' => $this->getLastRun()?->format(\DateTimeInterface::ATOM),
		];
	}
}