<?php
/**
 * TNT OFFICIAL MODULE FOR PRESTASHOP.
 *
 * @author    GFI Informatique <www.gfi.fr>
 * @copyright 2016-2017 GFI Informatique, 2016-2017 TNT
 * @license   https://opensource.org/licenses/MIT MIT License
 */

require_once _PS_MODULE_DIR_.'tntofficiel/libraries/TNTOfficiel_Debug.php';

/**
 * Class TNTOfficiel_ShippingHelper.
 */
class TNTOfficiel_ShippingHelper
{
    /**
     * @var Singleton
     */
    private static $_instance = null;

    /**
     * Constructor.
     */
    public function __construct()
    {
        TNTOfficiel_Debug::log(array('msg' => '>>', 'file' => __FILE__, 'line' => __LINE__));
    }

    /**
     * Creates a singleton.
     *
     * @param void
     *
     * @return TNTOfficiel_ShippingHelper
     */
    public static function getInstance()
    {
        TNTOfficiel_Debug::log(array('msg' => '>>', 'file' => __FILE__, 'line' => __LINE__));

        if (is_null(TNTOfficiel_ShippingHelper::$_instance)) {
            TNTOfficiel_ShippingHelper::$_instance = new TNTOfficiel_ShippingHelper();
        }

        return TNTOfficiel_ShippingHelper::$_instance;
    }

    /**
     * @var array
     */
    protected $_days = array(
        'Monday',
        'Tuesday',
        'Wednesday',
        'Thursday',
        'Friday',
        'Saturday',
        'Sunday',
    );

    /**
     * Returns an array with schedules for each days.
     *
     * @param array $params Parameters of the function
     *
     * @return array
     */
    public function getSchedules(array $params = array())
    {
        TNTOfficiel_Debug::log(array('msg' => '>>', 'file' => __FILE__, 'line' => __LINE__));

        $schedules = array();

        if ($hours = $params['hours']) {
            $index = 0;
            // Position corresponds to the number of the day
            $position = 0;
            // Current day
            $day = null;
            // Part of the day
            $part = null;

            foreach ($hours as $hour) {
                $hour = trim($hour);
                $day = $this->_days[$position];

                if (($index % 2 === 0) && ($index % 4 === 0)) {
                    $part = 'AM';
                } elseif (($index % 2 === 0) && ($index % 4 === 2)) {
                    $part = 'PM';
                }

                // Prepare the current Day
                if (!isset($schedules[$day])) {
                    $schedules[$day] = array();
                }

                // Prepare the current period of the current dya
                if (!isset($schedules[$day][$part]) && $hour) {
                    $schedules[$day][$part] = array();
                }

                // If hours different from 0
                if ($hour) {
                    // Add hour
                    $schedules[$day][$part][] = $hour;
                }

                ++$index;

                if ($index % 4 == 0) {
                    ++$position;
                }
            }
        }

        return $schedules;
    }
}