<?php

namespace CleantalkSP\SpbctWP;

/**
 * CleanTalk Security Cron class
 *
 * @package       Security Plugin by CleanTalk
 * @subpackage    Cron
 * @Version       2.0.1
 * @author        Cleantalk team (welcome@cleantalk.org)
 * @copyright (C) 2014 CleanTalk team (http://cleantalk.org)
 * @license       GNU/GPL: http://www.gnu.org/copyleft/gpl.html
 *
 */
class Cron extends \CleantalkSP\Common\Cron
{
    const CRON_OPTION_NAME = 'spbc_cron';
    const ID_OPTION = 'spbc_cron_id';
    const LAST_START_OPTION = 'spbc_cron_last_start';

    // Interval in seconds for restarting the task
    const TASK_EXECUTION_MIN_INTERVAL = 90;
    const CRON_EXECUTION_MIN_INTERVAL = 90;

    public $tasks; // Array with tasks
    public $tasks_to_run; // Array with tasks which should be run now
    public $tasks_completed; // Result of executed tasks

    /**
     * Cron constructor.
     * Getting tasks option.
     */
    public function __construct()
    {
        $this->tasks = self::getTasks();

        parent::__construct(self::TASK_EXECUTION_MIN_INTERVAL, self::CRON_EXECUTION_MIN_INTERVAL);
    }

    /**
     * Getting all tasks
     *
     * @return array
     */
    public static function getTasks()
    {
        $tasks = get_option(self::CRON_OPTION_NAME);

        return is_array($tasks) ? $tasks : array();
    }

    protected function getCronLastStart()
    {
        return get_option(self::LAST_START_OPTION, 0);
    }

    protected function setCronLastStart()
    {
        return update_option(self::LAST_START_OPTION, time());
    }

    /**
     * Saves Cron ID
     */
    protected function saveID()
    {
        update_option(self::ID_OPTION, $this->id);
    }

    /**
     * Saves Cron ID
     */
    protected function isIDmMatch()
    {
        return (int) get_option(self::ID_OPTION) === $this->id;
    }

    /**
     * Getting single task
     *
     * @param string $task
     *
     * @return array|false
     */
    public static function getTask($task)
    {
        $tasks = self::getTasks();

        return isset($tasks[$task]) ? $tasks[$task] : false;
    }

    /**
     * Save option with tasks
     *
     * @param array $tasks
     *
     * @return bool
     */
    public function saveTasks($tasks = array())
    {
        return update_option(self::CRON_OPTION_NAME, $tasks);
    }

    /**
     * Adding new cron task
     *
     * @param string $task
     * @param string $handler
     * @param int $period
     * @param int|null $first_call
     * @param array $params
     * @param int $last_call
     *
     * @return bool
     */
    public static function addTask($task, $handler, $period, $first_call = null, $params = array(), $last_call = 0)
    {
        $first_call = $first_call ?: time() + $period;

        $tasks = self::getTasks();

        if ( isset($tasks[$task]) ) {
            return false;
        }

        // Task entry
        $tasks[$task] = array(
            'handler'    => $handler,
            'next_call'  => $first_call,
            'period'     => $period,
            'params'     => $params,
            'processing' => false,
            'last_call'  => $last_call,
        );

        return update_option(self::CRON_OPTION_NAME, $tasks);
    }

    /**
     * Removing cron task
     *
     * @param $task
     *
     * @return bool
     * @psalm-suppress PossiblyUnusedReturnValue
     */
    public static function removeTask($task)
    {
        $tasks = self::getTasks();

        if ( ! isset($tasks[$task]) ) {
            return false;
        }

        unset($tasks[$task]);

        return update_option(self::CRON_OPTION_NAME, $tasks);
    }

    /**
     * @param string $task
     * @param string $handler
     * @param int $period
     * @param int|null $first_call
     * @param array $params
     *
     * @return bool
     * @psalm-suppress PossiblyUnusedReturnValue
     */
    public static function updateTask($task, $handler, $period, $first_call = null, $params = array())
    {
        $task_temp = self::getTask($task);

        self::removeTask($task);

        $task_last_call = isset($task_temp['last_call']) ? $task_temp['last_call'] : 0;

        return self::addTask($task, $handler, $period, $first_call, $params, $task_last_call);
    }

    /**
     * Delete all the cron tasks.
     * @return void
     */
    public static function removeAllTasks()
    {
        update_option(self::CRON_OPTION_NAME, array());
    }
}