<?php

Prado::using('Application.facades.Facade');
Prado::using('Application.dto.EventDTO');
Prado::using('Application.dto.TimezoneDTO');
Prado::using('Application.dto.GridEventDTO');
Prado::using('Application.dto.CalendarGridDTO');
Prado::using('Application.dto.GroupedCalendarGridDTO');
Prado::using('Application.model.Calendar');
Prado::using('Application.facades.CalendarFacade');
Prado::using('Application.user.DbUser');

class EventFacade extends Facade {

    public function getEventList(string $dateFrom=NULL, string $dateTo=NULL,
                                 array $calendars=NULL, string $order='ASC') {
        $calendarClause = '1=1';
        if ($calendars) {
            $calendarClause = sprintf(
                '_calendar IN (%s)',
                implode(
                    ',',
                    array_map(
                        function(Calendar $calendar) {
                            return $this->quoteString($calendar->UID);
                        },
                        $calendars
                    )
                )
            );
        }
        return $this->fetchList(
            'getEvents',
            [
                'date_from' => $dateFrom ?: '0000-00-00 00:00:00',
                'date_to' => $dateTo ?: '9999-99-99',
                'calendar_clause' => $calendarClause,
                'order_clause' => $order
            ]
        );
    }

    private function _compileEventObjects(array $events, array $calendars,
                                          TimezoneDTO $tz,
                                          string $class = 'Application.dto.EventDTO') {
        return array_map(
            function(Entry $event) use($calendars, $class, $tz) {
                $dto = Prado::createComponent($class, $tz);
                $dto->loadRecord($event, $calendars);
                return $dto;
            },
            $events
        );
    }

    public function getTimeframeListForUser(
        DbUser $user,
        DateTime $dateFrom, DateTime $dateTo,
        string $returnClass = 'Application.dto.EventDTO') {
        $calendars = CalendarFacade::getInstance()->getCalendarPreference($user);
        if ($calendars) {
            $events = $this->getEventList(
                $dateFrom->format('Y-m-d H:i:s'),
                $dateTo->format('Y-m-d H:i:s'),
                $calendars
            );
            $calendars = $this->_getCalendarsForEvents($events);
            return $this->_compileEventObjects(
                $events, $calendars,
                UserFacade::getInstance()->getTimezonePreference($user),
                $returnClass);
        }
        return [];
    }

    public function getCalendarListForUser(DbUser $user,
                                           $month, $year) {
        if (!$year) {
            $year = intval(date('Y'));
        }
        if (!$month) {
            $month = intval(date('m'));
        }
        $timezone = $user
            ? UserFacade::getInstance()->getTimezonePreference($user)
            : new TimezoneDTO(date_default_timezone_get());
        $timeframe = CalendarFacade::getInstance()->getCalendarBoundaries(
            $year, $month, $timezone
        );
        $dtoClass = 'CalendarGridDTO';
        if (UserFacade::getInstance()->getGroupedViewPreference($user)) {
            $dtoClass = 'Grouped' . $dtoClass;
        }
        return new $dtoClass(
            $this->getTimeframeListForUser(
                $user,
                $timeframe[0], $timeframe[1],
                'Application.dto.GridEventDTO'
            ),
            ...$timeframe
        );
    }

    private function _getCalendarsForEvents(array $events) {
        if ($events) {
            return Calendar::finder()->findAllByPks(
                array_map(
                    function(Entry $event) {
                        return $event->CalendarID;
                    },
                    $events
                )
            );
        }
        return [];
    }

}

?>