<?php
/**
 * Data and actions for the reception page: who arrives, who leaves, who is in house,
 * plus check-in / check-out / undo through HotelBookingDetail::changeStatus(), so the
 * same hooks run as in the order page (e.g. casposbridge posts the nights to the POS).
 */
class FrontDeskService
{
    const ASSIGNED = 1;
    const CHECKED_IN = 2;
    const CHECKED_OUT = 3;
    const NO_SHOW = 4;
    const CANCELLED = 5;

    protected $idLang;

    public function __construct($idLang = null)
    {
        $this->idLang = $idLang ?: (int)Configuration::get('PS_LANG_DEFAULT');
    }

    protected function select($where, $order)
    {
        $hasCaspos = (bool)Db::getInstance()->getValue('SELECT COUNT(*) FROM information_schema.tables
            WHERE table_schema = DATABASE() AND table_name = \''._DB_PREFIX_.'casposbridge_job\'');
        $sql = 'SELECT bd.`id`, bd.`id_order`, bd.`id_room`, bd.`room_num`, bd.`room_type_name`, bd.`id_status`,
                bd.`adults`, bd.`children`, DATE(bd.`date_from`) AS date_from, DATE(bd.`date_to`) AS date_to,
                bd.`check_in`, bd.`check_out`, c.`firstname`, c.`lastname`, c.`email`, o.`reference`,
                srcl.`name` AS source_name, src.`code` AS source_code'
                .($hasCaspos ? ', (SELECT COUNT(*) FROM `'._DB_PREFIX_.'casposbridge_job` j WHERE j.`id_htl_booking` = bd.`id` AND j.`status` = \'done\') AS pos_done,
                    (SELECT COUNT(*) FROM `'._DB_PREFIX_.'casposbridge_job` j WHERE j.`id_htl_booking` = bd.`id` AND j.`status` = \'failed\') AS pos_failed' : '').'
            FROM `'._DB_PREFIX_.'htl_booking_detail` bd
            LEFT JOIN `'._DB_PREFIX_.'customer` c ON c.`id_customer` = bd.`id_customer`
            LEFT JOIN `'._DB_PREFIX_.'orders` o ON o.`id_order` = bd.`id_order`
            LEFT JOIN `'._DB_PREFIX_.'source` src ON src.`id_source` = o.`id_source`
            LEFT JOIN `'._DB_PREFIX_.'source_lang` srcl ON srcl.`id_source` = src.`id_source` AND srcl.`id_lang` = '.(int)$this->idLang.'
            WHERE bd.`is_back_order` = 0 AND '.$where
            .(method_exists('OrderReturn', 'getRefundedBookingIdsSubquery') ? ' AND bd.`id` NOT IN ('.OrderReturn::getRefundedBookingIdsSubquery().')' : '')
            .' ORDER BY '.$order;
        return (array)Db::getInstance()->executeS($sql);
    }

    /** Guests arriving on $day: still to check in, and those already checked in that day. */
    public function arrivals($day)
    {
        return $this->select('DATE(bd.`date_from`) = \''.pSQL($day).'\' AND bd.`id_status` IN ('.self::ASSIGNED.', '.self::CHECKED_IN.')',
            'bd.`id_status`, bd.`room_num`');
    }

    /** Guests due to leave on $day (still in house) and those already checked out that day. */
    public function departures($day)
    {
        return $this->select('DATE(bd.`date_to`) = \''.pSQL($day).'\' AND bd.`id_status` IN ('.self::CHECKED_IN.', '.self::CHECKED_OUT.')',
            'FIELD(bd.`id_status`, '.self::CHECKED_IN.', '.self::CHECKED_OUT.'), bd.`room_num`');
    }

    /** Guests in house who neither arrive nor leave on $day. */
    public function inHouse($day)
    {
        return $this->select('bd.`id_status` = '.self::CHECKED_IN.' AND DATE(bd.`date_from`) < \''.pSQL($day).'\' AND DATE(bd.`date_to`) > \''.pSQL($day).'\'',
            'bd.`room_num`');
    }

    /** Overdue: should have arrived before $day but are still only booked. */
    public function overdue($day)
    {
        return $this->select('bd.`id_status` = '.self::ASSIGNED.' AND DATE(bd.`date_from`) < \''.pSQL($day).'\' AND DATE(bd.`date_to`) > \''.pSQL($day).'\'',
            'bd.`date_from`, bd.`room_num`');
    }

    /**
     * @param string $action checkin | checkout | undo_checkin | undo_checkout
     * @return array [bool ok, string message]
     */
    public function act($idBooking, $action, $idEmployee = 0)
    {
        $b = new HotelBookingDetail((int)$idBooking);
        if (!Validate::isLoadedObject($b)) {
            return array(false, 'Buchung nicht gefunden.');
        }
        $guest = trim((string)Db::getInstance()->getValue('SELECT CONCAT(`firstname`, " ", `lastname`) FROM `'._DB_PREFIX_.'customer` WHERE `id_customer` = '.(int)$b->id_customer));
        $who = ($guest ?: 'Gast').' (Zimmer '.$b->room_num.')';
        $now = date('Y-m-d H:i:s');
        $params = array('id_employee' => (int)$idEmployee, 'remark' => 'Rezeption');

        switch ($action) {
            case 'checkin':
                if ((int)$b->id_status !== self::ASSIGNED) {
                    return array(false, $who.' ist nicht im Status „gebucht“.');
                }
                $b->check_in = $now;
                $b->check_out = '';
                $ok = $b->changeStatus(self::CHECKED_IN, $params);
                return array($ok, $ok ? $who.' ist eingecheckt.' : 'Einchecken hat nicht geklappt.');
            case 'checkout':
                if ((int)$b->id_status !== self::CHECKED_IN) {
                    return array(false, $who.' ist nicht eingecheckt.');
                }
                $b->check_out = $now;
                // billing happens at the POS (CASPOS); the QloApps payment state is not checked here
                $ok = $b->changeStatus(self::CHECKED_OUT, $params);
                return array($ok, $ok ? $who.' ist ausgecheckt.' : 'Auschecken hat nicht geklappt.');
            case 'undo_checkin':
                if ((int)$b->id_status !== self::CHECKED_IN) {
                    return array(false, $who.' ist nicht eingecheckt.');
                }
                $b->check_in = '';
                $b->check_out = '';
                $ok = $b->changeStatus(self::ASSIGNED, $params);
                return array($ok, $ok ? 'Einchecken von '.$who.' zurückgenommen.' : 'Zurücknehmen hat nicht geklappt.');
            case 'undo_checkout':
                if ((int)$b->id_status !== self::CHECKED_OUT) {
                    return array(false, $who.' ist nicht ausgecheckt.');
                }
                $b->check_out = '';
                $ok = $b->changeStatus(self::CHECKED_IN, $params);
                return array($ok, $ok ? 'Auschecken von '.$who.' zurückgenommen.' : 'Zurücknehmen hat nicht geklappt.');
        }
        return array(false, 'Unbekannte Aktion.');
    }
}