<?php

class Application_Model_Schedule
{
    public const MASTER_SOURCE_NAME = 'Master';
    public const SHOW_SOURCE_NAME = 'Live';
    public const SCHEDULED_SOURCE_NAME = 'Scheduled';
    public const LIVE_STREAM = 'Live Stream';

    /**
     * Return TRUE if file is going to be played in the future.
     *
     * @param string $p_fileId
     */
    public static function IsFileScheduledInTheFuture($p_fileId)
    {
        $sql = <<<'SQL'
SELECT COUNT(*)
FROM cc_schedule
WHERE file_id = :file_id
  AND ends > NOW() AT TIME ZONE 'UTC'
SQL;
        $count = Application_Common_Database::prepareAndExecute($sql, [
            ':file_id' => $p_fileId,
        ], 'column');

        return is_numeric($count) && ($count != '0');
    }

    public static function getAllFutureScheduledFiles($instanceId = null)
    {
        $sql = <<<'SQL'
SELECT distinct(file_id)
FROM cc_schedule
WHERE ends > now() AT TIME ZONE 'UTC'
AND file_id is not null
SQL;

        $files = Application_Common_Database::prepareAndExecute($sql, []);

        $real_files = [];
        foreach ($files as $f) {
            $real_files[] = $f['file_id'];
        }

        return $real_files;
    }

    public static function getAllFutureScheduledWebstreams()
    {
        $sql = <<<'SQL'
SELECT distinct(stream_id)
FROM cc_schedule
WHERE ends > now() AT TIME ZONE 'UTC'
AND stream_id is not null
SQL;
        $streams = Application_Common_Database::prepareAndExecute($sql, []);

        $real_streams = [];
        foreach ($streams as $s) {
            $real_streams[] = $s['stream_id'];
        }

        return $real_streams;
    }

    /**
     * Returns an array with 2 elements: artist and title name of the track that is currently playing.
     * Elements will be set to null if metadata is not set for those fields.
     *
     * Returns null if no track is currently playing.
     *
     * Data is based on GetPlayOrderRange() in this class.
     */
    public static function getCurrentPlayingTrack()
    {
        $currentScheduleInfo = self::GetPlayOrderRange();
        if (empty($currentScheduleInfo['tracks']['current'])) {
            return null;
        }

        $currentTrackArray = explode(' - ', $currentScheduleInfo['tracks']['current']['name']);

        return [
            'artist' => empty($currentTrackArray[0]) ? null : urlencode($currentTrackArray[0]),
            'title' => empty($currentTrackArray[1]) ? null : urlencode($currentTrackArray[1]),
        ];
    }

    /**
     * Returns data related to the scheduled items.
     *
     * @param null|mixed $utcTimeEnd
     * @param mixed      $showsToRetrieve
     */
    public static function GetPlayOrderRange($utcTimeEnd = null, $showsToRetrieve = 5)
    {
        // Everything in this function must be done in UTC. You will get a swift kick in the pants if you mess that up.

        // when timeEnd is unspecified, return to the default behaviour - set a range of 48 hours from current time
        if (!$utcTimeEnd) {
            $end = new DateTime();
            $end->add(new DateInterval('P2D')); // Add 2 days
            $end->setTimezone(new DateTimeZone('UTC'));
            $utcTimeEnd = $end->format(DEFAULT_TIMESTAMP_FORMAT);
        }

        $utcNow = new DateTime('now', new DateTimeZone('UTC'));

        $shows = Application_Model_Show::getPrevCurrentNext($utcNow, $utcTimeEnd, $showsToRetrieve);
        $currentShowID = null;
        if (is_array($shows['currentShow']) && count($shows['currentShow']) > 0) {
            $currentShowID = $shows['currentShow']['instance_id'];
        }
        $source = self::_getSource();
        $results = Application_Model_Schedule::getPreviousCurrentNextMedia($utcNow, $currentShowID, self::_getSource());

        return [
            'station' => [
                'env' => APPLICATION_ENV,
                'schedulerTime' => $utcNow->format(DEFAULT_TIMESTAMP_FORMAT),
                'source_enabled' => $source,
            ],
            // Previous, current, next songs!
            'tracks' => [
                'previous' => $results['previous'],
                'current' => $results['current'],
                'next' => $results['next'],
            ],
            // Current and next shows
            'shows' => [
                'previous' => $shows['previousShow'],
                'current' => $shows['currentShow'],
                'next' => $shows['nextShow'],
            ],
        ];
    }

    /**
     * Old version of the function for backwards compatibility.
     *
     * @deprecated
     */
    public static function GetPlayOrderRangeOld()
    {
        // Everything in this function must be done in UTC. You will get a swift kick in the pants if you mess that up.

        $utcNow = new DateTime('now', new DateTimeZone('UTC'));

        $shows = Application_Model_Show::getPrevCurrentNextOld($utcNow);
        $currentShowID = count($shows['currentShow']) > 0 ? $shows['currentShow'][0]['instance_id'] : null;
        $source = self::_getSource();
        $results = Application_Model_Schedule::getPreviousCurrentNextMedia($utcNow, $currentShowID, $source);

        return [
            'env' => APPLICATION_ENV,
            'schedulerTime' => $utcNow->format(DEFAULT_TIMESTAMP_FORMAT),
            // Previous, current, next songs!
            'previous' => $results['previous'] != null ? $results['previous'] : (count($shows['previousShow']) > 0 ? $shows['previousShow'][0] : null),
            'current' => $results['current'] != null ? $results['current'] : ((count($shows['currentShow']) > 0 && $shows['currentShow'][0]['record'] == 1) ? $shows['currentShow'][0] : null),
            'next' => $results['next'] != null ? $results['next'] : (count($shows['nextShow']) > 0 ? $shows['nextShow'][0] : null),
            // Current and next shows
            'currentShow' => $shows['currentShow'],
            'nextShow' => $shows['nextShow'],
            'source_enabled' => $source,
        ];
    }

    /**
     * Attempts to find a media item (track or webstream) that is currently playing.
     * If a current media item is currently playing, this function then attempts to
     * find an item that played previously and is scheduled to play next.
     *
     * @param $utcNow                DateTime current time in UTC
     * @param $currentShowInstanceId int      id of the show instance currently playing
     * @param $source                string   the current prioritized source
     *
     * @return array with data about the previous, current, and next media items playing.
     *               Returns an empty arrays if there is no media item currently playing
     */
    public static function getPreviousCurrentNextMedia($utcNow, $currentShowInstanceId, $source)
    {
        $timeZone = new DateTimeZone('UTC'); // This function works entirely in UTC.
        assert(get_class($utcNow) === 'DateTime');
        assert($utcNow->getTimeZone() == $timeZone);

        $results['previous'] = null;
        $results['current'] = null;
        $results['next'] = null;

        $sql = 'select s.id, s.starts, s.ends, s.file_id, s.stream_id, s.media_item_played,
                s.instance_id, si.ends as show_ends from cc_schedule s left join cc_show_instances si
                on s.instance_id = si.id where s.playout_status > 0 and s.starts <= :p1
                and s.ends >= :p2 and s.instance_id = :p3 order by starts desc limit 1';

        $params = [
            ':p1' => $utcNow->format(DEFAULT_TIMESTAMP_FORMAT),
            ':p2' => $utcNow->format(DEFAULT_TIMESTAMP_FORMAT),
            ':p3' => $currentShowInstanceId,
        ];

        $rows = Application_Common_Database::prepareAndExecute($sql, $params);

        // If live streaming (master or show source) is enabled, set the current
        // track information to the current show values
        if ($source != self::SCHEDULED_SOURCE_NAME) {
            $show = Application_Model_Show::getCurrentShow();
            $results['current'] = isset($show[0]) ? [
                'starts' => $show[0]['starts'],
                'ends' => $show[0]['ends'],
                'type' => _('livestream'),
                'name' => $show[0]['name'] . ' - ' . _(self::LIVE_STREAM),
                'media_item_played' => false,
                'record' => '0',
            ] : null;
        } elseif (count($rows) >= 1) {
            $currentMedia = $rows[0];

            if ($currentMedia['ends'] > $currentMedia['show_ends']) {
                $currentMedia['ends'] = $currentMedia['show_ends'];
            }

            $currentMetadata = null;
            $currentMediaName = '';
            $currentMediaFileId = $currentMedia['file_id'];
            $currentMediaStreamId = $currentMedia['stream_id'];
            if (isset($currentMediaFileId)) {
                $currentMediaType = 'track';
                $currentFile = CcFilesQuery::create()
                    ->filterByDbId($currentMediaFileId)
                    ->findOne();
                $currentMediaName = $currentFile->getDbArtistName() . ' - ' . $currentFile->getDbTrackTitle();
                $currentMetadata = CcFiles::sanitizeResponse($currentFile);
            } elseif (isset($currentMediaStreamId)) {
                $currentMediaType = 'webstream';
                $currentWebstream = CcWebstreamQuery::create()
                    ->filterByDbId($currentMediaStreamId)
                    ->findOne();
                $currentWebstreamMetadata = CcWebstreamMetadataQuery::create()
                    ->filterByDbInstanceId($currentMedia['id'])
                    ->orderByDbStartTime(Criteria::DESC)
                    ->findOne();
                $currentMediaName = $currentWebstream->getDbName();
                if (isset($currentWebstreamMetadata)) {
                    $currentMediaName .= ' - ' . $currentWebstreamMetadata->getDbLiquidsoapData();
                }
            } else {
                $currentMediaType = null;
            }

            $results['current'] = [
                'starts' => $currentMedia['starts'],
                'ends' => $currentMedia['ends'],
                'type' => $currentMediaType,
                'name' => $currentMediaName,
                'media_item_played' => $currentMedia['media_item_played'],
                'metadata' => $currentMetadata,
                'record' => '0',
            ];
        }

        $previousMedia = CcScheduleQuery::create()
            ->filterByDbEnds($utcNow, Criteria::LESS_THAN)
            ->filterByDbPlayoutStatus(0, Criteria::GREATER_THAN)
            ->orderByDbStarts(Criteria::DESC)
            ->findOne();
        if (isset($previousMedia)) {
            $previousMetadata = null;
            $previousMediaName = '';
            $previousMediaFileId = $previousMedia->getDbFileId();
            $previousMediaStreamId = $previousMedia->getDbStreamId();
            if (isset($previousMediaFileId)) {
                $previousMediaType = 'track';
                $previousFile = CcFilesQuery::create()
                    ->filterByDbId($previousMediaFileId)
                    ->findOne();
                if (isset($previousFile)) {
                    $previousMediaName = $previousFile->getDbArtistName() . ' - ' . $previousFile->getDbTrackTitle();
                    $previousMetadata = CcFiles::sanitizeResponse($previousFile);
                }
            } elseif (isset($previousMediaStreamId)) {
                $previousMediaName = null;
                $previousMediaType = 'webstream';
                $previousWebstream = CcWebstreamQuery::create()
                    ->filterByDbId($previousMediaStreamId)
                    ->findOne();
                $previousMediaName = $previousWebstream->getDbName();
            } else {
                $previousMediaType = null;
            }
            $results['previous'] = [
                'starts' => $previousMedia->getDbStarts(),
                'ends' => $previousMedia->getDbEnds(),
                'type' => $previousMediaType,
                'name' => $previousMediaName,
                'metadata' => $previousMetadata,
            ];
        }

        $nextMedia = CcScheduleQuery::create()
            ->filterByDbStarts($utcNow, Criteria::GREATER_THAN)
            ->filterByDbPlayoutStatus(0, Criteria::GREATER_THAN)
            ->orderByDbStarts(Criteria::ASC)
            ->findOne();
        if (isset($nextMedia)) {
            $nextMetadata = null;
            $nextMediaName = '';
            $nextMediaFileId = $nextMedia->getDbFileId();
            $nextMediaStreamId = $nextMedia->getDbStreamId();
            if (isset($nextMediaFileId)) {
                $nextMediaType = 'track';
                $nextFile = CcFilesQuery::create()
                    ->filterByDbId($nextMediaFileId)
                    ->findOne();
                $nextMetadata = CcFiles::sanitizeResponse($nextFile);
                $nextMediaName = $nextFile->getDbArtistName() . ' - ' . $nextFile->getDbTrackTitle();
            } elseif (isset($nextMediaStreamId)) {
                $nextMediaType = 'webstream';
                $nextWebstream = CcWebstreamQuery::create()
                    ->filterByDbId($nextMediaStreamId)
                    ->findOne();
                $nextMediaName = $nextWebstream->getDbName();
            } else {
                $nextMediaType = null;
            }
            $results['next'] = [
                'starts' => $nextMedia->getDbStarts(),
                'ends' => $nextMedia->getDbEnds(),
                'type' => $nextMediaType,
                'name' => $nextMediaName,
                'metadata' => $nextMetadata,
            ];
        }

        return $results;
    }

    /**
     * Get the current prioritized source.
     *
     * Priority order is Master->Live/Show->Scheduled.
     *
     * @return string the source name
     */
    private static function _getSource()
    {
        $live_dj = Application_Model_Preference::GetSourceStatus('live_dj');
        $master_dj = Application_Model_Preference::GetSourceStatus('master_dj');

        return $master_dj ? self::MASTER_SOURCE_NAME
            : ($live_dj ? self::SHOW_SOURCE_NAME : self::SCHEDULED_SOURCE_NAME);
    }

    public static function GetLastScheduleItem($p_timeNow)
    {
        $sql = <<<'SQL'
SELECT ft.artist_name,
       ft.track_title,
       st.starts AS starts,
       st.ends AS ends
FROM cc_schedule st
LEFT JOIN cc_files ft ON st.file_id = ft.id
LEFT JOIN cc_show_instances sit ON st.instance_id = sit.id
-- this and the next line are necessary since we can overbook shows.
WHERE st.ends < TIMESTAMP :timeNow

  AND st.starts >= sit.starts
  AND st.starts < sit.ends
ORDER BY st.ends DESC LIMIT 1;
SQL;

        return Application_Common_Database::prepareAndExecute($sql, [':timeNow' => $p_timeNow]);
    }

    public static function GetCurrentScheduleItem($p_timeNow, $p_instanceId)
    {
        /* Note that usually there will be one result returned. In some
         * rare cases two songs are returned. This happens when a track
         * that was overbooked from a previous show appears as if it
         * hasnt ended yet (track end time hasn't been reached yet). For
         * this reason,  we need to get the track that starts later, as
         * this is the *real* track that is currently playing. So this
         * is why we are ordering by track start time. */
        $sql = 'SELECT *'
            . ' FROM cc_schedule st'
            . ' LEFT JOIN cc_files ft'
            . ' ON st.file_id = ft.id'
            . ' WHERE st.starts <= TIMESTAMP :timeNow1'
            . ' AND st.instance_id = :instanceId'
            . ' AND st.ends > TIMESTAMP :timeNow2'
            . ' ORDER BY st.starts DESC'
            . ' LIMIT 1';

        return Application_Common_Database::prepareAndExecute($sql, [':timeNow1' => $p_timeNow, ':instanceId' => $p_instanceId, ':timeNow2' => $p_timeNow]);
    }

    public static function GetNextScheduleItem($p_timeNow)
    {
        $sql = 'SELECT'
            . ' ft.artist_name, ft.track_title,'
            . ' st.starts as starts, st.ends as ends'
            . ' FROM cc_schedule st'
            . ' LEFT JOIN cc_files ft'
            . ' ON st.file_id = ft.id'
            . ' LEFT JOIN cc_show_instances sit'
            . ' ON st.instance_id = sit.id'
            . ' WHERE st.starts > TIMESTAMP :timeNow'
            . ' AND st.starts >= sit.starts' // this and the next line are necessary since we can overbook shows.
            . ' AND st.starts < sit.ends'
            . ' ORDER BY st.starts'
            . ' LIMIT 1';

        return Application_Common_Database::prepareAndExecute($sql, [':timeNow' => $p_timeNow]);
    }

    /*
     *
     * @param DateTime $p_startDateTime
     *
     * @param DateTime $p_endDateTime
     *
     * @return array $scheduledItems
     *
     */
    public static function GetScheduleDetailItems($p_start, $p_end, $p_shows, $p_show_instances)
    {
        $p_start_str = $p_start->format(DEFAULT_TIMESTAMP_FORMAT);
        $p_end_str = $p_end->format(DEFAULT_TIMESTAMP_FORMAT);

        // We need to search 48 hours before and after the show times so that that we
        // capture all of the show's contents.
        $p_track_start = $p_start->sub(new DateInterval('PT48H'))->format(DEFAULT_TIMESTAMP_FORMAT);
        $p_track_end = $p_end->add(new DateInterval('PT48H'))->format(DEFAULT_TIMESTAMP_FORMAT);

        $templateSql = <<<'SQL'
SELECT DISTINCT sched.starts AS sched_starts,
                sched.ends AS sched_ends,
                sched.id AS sched_id,
                sched.cue_in AS cue_in,
                sched.cue_out AS cue_out,
                sched.fade_in AS fade_in,
                sched.fade_out AS fade_out,
                sched.playout_status AS playout_status,
                sched.instance_id AS sched_instance_id,

                %%columns%%
                FROM (%%join%%)
SQL;

        $filesColumns = <<<'SQL'
                ft.track_title AS file_track_title,
                ft.artist_name AS file_artist_name,
                ft.album_title AS file_album_title,
                ft.length AS file_length,
                ft.file_exists AS file_exists,
                ft.mime AS file_mime
SQL;
        $filesJoin = <<<'SQL'
       cc_schedule AS sched
       JOIN cc_files AS ft ON (sched.file_id = ft.id
           AND ((sched.starts >= :fj_ts_1
               AND sched.starts < :fj_ts_2)
               OR (sched.ends > :fj_ts_3
               AND sched.ends <= :fj_ts_4)
               OR (sched.starts <= :fj_ts_5
               AND sched.ends >= :fj_ts_6))
        )
SQL;
        $paramMap = [
            ':fj_ts_1' => $p_track_start,
            ':fj_ts_2' => $p_track_end,
            ':fj_ts_3' => $p_track_start,
            ':fj_ts_4' => $p_track_end,
            ':fj_ts_5' => $p_track_start,
            ':fj_ts_6' => $p_track_end,
        ];

        $filesSql = str_replace(
            '%%columns%%',
            $filesColumns,
            $templateSql
        );
        $filesSql = str_replace(
            '%%join%%',
            $filesJoin,
            $filesSql
        );

        $streamColumns = <<<'SQL'
                ws.name AS file_track_title,
                sub.login AS file_artist_name,
                ws.description AS file_album_title,
                ws.length AS file_length,
                't'::BOOL AS file_exists,
                ws.mime AS file_mime
SQL;
        $streamJoin = <<<'SQL'
      cc_schedule AS sched
      JOIN cc_webstream AS ws ON (sched.stream_id = ws.id
          AND ((sched.starts >= :sj_ts_1
               AND sched.starts < :sj_ts_2)
               OR (sched.ends > :sj_ts_3
               AND sched.ends <= :sj_ts_4)
               OR (sched.starts <= :sj_ts_5
               AND sched.ends >= :sj_ts_6))
      )
      LEFT JOIN cc_subjs AS sub ON (ws.creator_id = sub.id)
SQL;
        $map = [
            ':sj_ts_1' => $p_track_start,
            ':sj_ts_2' => $p_track_end,
            ':sj_ts_3' => $p_track_start,
            ':sj_ts_4' => $p_track_end,
            ':sj_ts_5' => $p_track_start,
            ':sj_ts_6' => $p_track_end,
        ];
        $paramMap += $map;

        $streamSql = str_replace(
            '%%columns%%',
            $streamColumns,
            $templateSql
        );
        $streamSql = str_replace(
            '%%join%%',
            $streamJoin,
            $streamSql
        );

        $showPredicate = '';
        if (count($p_shows) > 0) {
            $params = [];
            $map = [];

            for ($i = 0, $len = count($p_shows); $i < $len; ++$i) {
                $holder = ':show_' . $i;

                $params[] = $holder;
                $map[$holder] = $p_shows[$i];
            }

            $showPredicate = ' AND show_id IN (' . implode(',', $params) . ')';
            $paramMap += $map;
        } elseif (count($p_show_instances) > 0) {
            $showPredicate = ' AND si.id IN (' . implode(',', $p_show_instances) . ')';
        }

        $sql = <<<SQL
SELECT showt.name AS show_name,
       showt.color AS show_color,
       showt.background_color AS show_background_color,
       showt.id AS show_id,
       showt.linked AS linked,
       si.starts AS si_starts,
       si.ends AS si_ends,
       si.time_filled AS si_time_filled,
       si.record AS si_record,
       si.rebroadcast AS si_rebroadcast,
       si.instance_id AS parent_show,
       si.id AS si_id,
       si.last_scheduled AS si_last_scheduled,
       si.file_id AS si_file_id,
       *
       FROM (({$filesSql}) UNION ({$streamSql})) as temp
       RIGHT JOIN cc_show_instances AS si ON (si.id = sched_instance_id)
JOIN cc_show AS showt ON (showt.id = si.show_id)
WHERE si.modified_instance = FALSE
  {$showPredicate}
  AND ((si.starts >= :ts_1
       AND si.starts < :ts_2)
  OR (si.ends > :ts_3
      AND si.ends <= :ts_4)
  OR (si.starts <= :ts_5
      AND si.ends >= :ts_6))
ORDER BY si_starts,
         sched_starts;
SQL;

        $map = [
            ':ts_1' => $p_start_str,
            ':ts_2' => $p_end_str,
            ':ts_3' => $p_start_str,
            ':ts_4' => $p_end_str,
            ':ts_5' => $p_start_str,
            ':ts_6' => $p_end_str,
        ];
        $paramMap += $map;

        return Application_Common_Database::prepareAndExecute(
            $sql,
            $paramMap,
            Application_Common_Database::ALL
        );
    }

    public static function UpdateMediaPlayedStatus($p_id)
    {
        $sql = 'UPDATE cc_schedule'
            . ' SET media_item_played=TRUE';
        // we need to update 'broadcasted' column as well
        // check the current switch status
        $live_dj = Application_Model_Preference::GetSourceSwitchStatus('live_dj') == 'on';
        $master_dj = Application_Model_Preference::GetSourceSwitchStatus('master_dj') == 'on';
        $scheduled_play = Application_Model_Preference::GetSourceSwitchStatus('scheduled_play') == 'on';

        if (!$live_dj && !$master_dj && $scheduled_play) {
            $sql .= ', broadcasted=1';
        }

        $sql .= ' WHERE id=:pid';
        $map = [':pid' => $p_id];

        Application_Common_Database::prepareAndExecute(
            $sql,
            $map,
            Application_Common_Database::EXECUTE
        );
    }

    public static function UpdateBrodcastedStatus($dateTime, $value)
    {
        $now = $dateTime->format(DEFAULT_TIMESTAMP_FORMAT);

        $sql = <<<'SQL'
UPDATE cc_schedule
SET broadcasted=:broadcastedValue
WHERE starts <= :starts::TIMESTAMP
  AND ends >= :ends::TIMESTAMP
SQL;

        return Application_Common_Database::prepareAndExecute($sql, [
            ':broadcastedValue' => $value,
            ':starts' => $now,
            ':ends' => $now,
        ], 'execute');
    }

    public static function getSchduledPlaylistCount()
    {
        $sql = 'SELECT count(*) as cnt FROM cc_schedule';

        return Application_Common_Database::prepareAndExecute(
            $sql,
            [],
            Application_Common_Database::COLUMN
        );
    }

    /**
     * Convert a time string in the format "YYYY-MM-DD HH:mm:SS"
     * to "YYYY-MM-DD-HH-mm-SS".
     *
     * @param string $p_time
     *
     * @return string
     */
    private static function AirtimeTimeToPypoTime($p_time)
    {
        $p_time = substr($p_time, 0, 19);
        $p_time = str_replace(' ', '-', $p_time);

        return str_replace(':', '-', $p_time);
    }

    /**
     * Convert a time string in the format "YYYY-MM-DD-HH-mm-SS" to
     * "YYYY-MM-DD HH:mm:SS".
     *
     * @param string $p_time
     *
     * @return string
     */
    private static function PypoTimeToAirtimeTime($p_time)
    {
        $t = explode('-', $p_time);

        return $t[0] . '-' . $t[1] . '-' . $t[2] . ' ' . $t[3] . ':' . $t[4] . ':00';
    }

    /**
     * Return true if the input string is in the format YYYY-MM-DD-HH-mm.
     *
     * @param string $p_time
     *
     * @return bool
     */
    public static function ValidPypoTimeFormat($p_time)
    {
        $t = explode('-', $p_time);
        if (count($t) != 5) {
            return false;
        }
        foreach ($t as $part) {
            if (!is_numeric($part)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Converts a time value as a string (with format HH:MM:SS.mmmmmm) to
     * millisecs.
     *
     * @param string $p_time
     *
     * @return int
     */
    public static function WallTimeToMillisecs($p_time)
    {
        $t = explode(':', $p_time);
        $millisecs = 0;
        if (strpos($t[2], '.')) {
            $secParts = explode('.', $t[2]);
            $millisecs = $secParts[1];
            $millisecs = str_pad(substr($millisecs, 0, 3), 3, '0');
            $millisecs = intval($millisecs);
            $seconds = intval($secParts[0]);
        } else {
            $seconds = intval($t[2]);
        }

        return $millisecs + ($seconds * 1000) + ($t[1] * 60 * 1000) + ($t[0] * 60 * 60 * 1000);
    }

    /**
     * Returns an array of schedule items from cc_schedule table. Tries
     * to return at least 3 items (if they are available). The parameters
     * $p_startTime and $p_endTime specify the range. Schedule items returned
     * do not have to be entirely within this range. It is enough that the end
     * or beginning of the scheduled item is in the range.
     *
     * @param string $p_startTime
     *                            In the format YYYY-MM-DD HH:MM:SS.nnnnnn
     * @param string $p_endTime
     *                            In the format YYYY-MM-DD HH:MM:SS.nnnnnn
     *
     * @return array
     *               Returns null if nothing found, else an array of associative
     *               arrays representing each row
     */
    public static function getItems($p_startTime, $p_endTime)
    {
        $baseQuery = <<<'SQL'
SELECT st.file_id     AS file_id,
       st.id          AS id,
       st.instance_id AS instance_id,
       st.starts      AS start,
       st.ends        AS end,
       st.cue_in      AS cue_in,
       st.cue_out     AS cue_out,
       st.fade_in     AS fade_in,
       st.fade_out    AS fade_out,
       si.starts      AS show_start,
       si.ends        AS show_end,
       s.name         AS show_name,
       f.id           AS file_id,
       f.replay_gain  AS replay_gain,
       ws.id          AS stream_id,
       ws.url         AS url
FROM cc_schedule AS st
LEFT JOIN cc_show_instances AS si ON st.instance_id = si.id
LEFT JOIN cc_show           AS s  ON s.id = si.show_id
LEFT JOIN cc_files          AS f  ON st.file_id = f.id
LEFT JOIN cc_webstream      AS ws ON st.stream_id = ws.id
SQL;
        $predicates = <<<'SQL'
WHERE st.ends > :startTime1
  AND st.starts < :endTime
  AND st.playout_status > 0
  AND si.ends > :startTime2
  AND si.modified_instance = 'f'
ORDER BY st.starts
SQL;

        $sql = $baseQuery . ' ' . $predicates;

        $rows = Application_Common_Database::prepareAndExecute($sql, [
            ':startTime1' => $p_startTime,
            ':endTime' => $p_endTime,
            ':startTime2' => $p_startTime,
        ]);

        if (count($rows) < 3) {
            $dt = new DateTime('@' . time());
            $dt->add(new DateInterval('PT24H'));
            $range_end = $dt->format(DEFAULT_TIMESTAMP_FORMAT);

            $predicates = <<<'SQL'
WHERE st.ends > :startTime1
  AND st.starts < :rangeEnd
  AND st.playout_status > 0
  AND si.ends > :startTime2
  AND si.modified_instance = 'f'
ORDER BY st.starts LIMIT 3
SQL;

            $sql = $baseQuery . ' ' . $predicates . ' ';
            $rows = Application_Common_Database::prepareAndExecute(
                $sql,
                [
                    ':startTime1' => $p_startTime,
                    ':rangeEnd' => $range_end,
                    ':startTime2' => $p_startTime,
                ]
            );
        }

        return $rows;
    }

    /**
     * This function will ensure that an existing index in the
     * associative array is never overwritten, instead appending
     * _0, _1, _2, ... to the end of the key to make sure it is unique.
     *
     * @param mixed $data
     * @param mixed $time
     * @param mixed $item
     */
    private static function appendScheduleItem(&$data, $time, $item)
    {
        $key = $time;
        $i = 0;

        while (array_key_exists($key, $data['media'])) {
            $key = "{$time}_{$i}";
            ++$i;
        }

        $data['media'][$key] = $item;
    }

    private static function createInputHarborKickTimes(&$data, $range_start, $range_end)
    {
        $utcTimeZone = new DateTimeZone('UTC');
        $kick_times = Application_Model_ShowInstance::GetEndTimeOfNextShowWithLiveDJ($range_start, $range_end);
        foreach ($kick_times as $kick_time_info) {
            $kick_time = $kick_time_info['ends'];
            $temp = explode('.', Application_Model_Preference::GetDefaultTransitionFade());
            // we round down transition time since PHP cannot handle millisecond. We need to
            // handle this better in the future
            $transition_time = intval($temp[0]);
            $switchOffDataTime = new DateTime($kick_time, $utcTimeZone);
            $switch_off_time = $switchOffDataTime->sub(new DateInterval('PT' . $transition_time . 'S'));
            $switch_off_time = $switch_off_time->format(DEFAULT_TIMESTAMP_FORMAT);

            $kick_start = self::AirtimeTimeToPypoTime($kick_time);
            $data['media'][$kick_start]['start'] = $kick_start;
            $data['media'][$kick_start]['end'] = $kick_start;
            $data['media'][$kick_start]['event_type'] = 'kick_out';
            $data['media'][$kick_start]['type'] = 'event';

            if ($kick_time !== $switch_off_time) {
                $switch_start = self::AirtimeTimeToPypoTime($switch_off_time);
                $data['media'][$switch_start]['start'] = $switch_start;
                $data['media'][$switch_start]['end'] = $switch_start;
                $data['media'][$switch_start]['event_type'] = 'switch_off';
                $data['media'][$switch_start]['type'] = 'event';
            }
        }
    }

    /**
     * Appends schedule "events" to an array of schedule events that gets
     * sent to PYPO. Each schedule event contains information PYPO and
     * Liquidsoap need for playout.
     *
     * @param array  $data     array to be filled with schedule info - $item(s)
     * @param array  $item     schedule info about one track
     * @param int    $media_id scheduled item's cc_files id
     * @param string $uri      path to the scheduled item's physical location
     * @param mixed  $filesize
     */
    private static function createFileScheduleEvent(&$data, $item, $media_id, $uri, $filesize)
    {
        $start = self::AirtimeTimeToPypoTime($item['start']);
        $end = self::AirtimeTimeToPypoTime($item['end']);

        $replay_gain = is_null($item['replay_gain']) ? '0' : $item['replay_gain'];
        $replay_gain += Application_Model_Preference::getReplayGainModifier();

        if (!Application_Model_Preference::GetEnableReplayGain()) {
            $replay_gain = 0;
        }

        $fileMetadata = CcFiles::sanitizeResponse(CcFilesQuery::create()->findPk($media_id));

        $schedule_item = [
            'id' => $media_id,
            'type' => 'file',
            'track_title' => $fileMetadata['track_title'],
            'artist_name' => $fileMetadata['artist_name'],
            'mime' => $fileMetadata['mime'],
            'row_id' => $item['id'],
            'uri' => $uri,
            'fade_in' => Application_Model_Schedule::WallTimeToMillisecs($item['fade_in']),
            'fade_out' => Application_Model_Schedule::WallTimeToMillisecs($item['fade_out']),
            'cue_in' => Application_Common_DateHelper::CalculateLengthInSeconds($item['cue_in']),
            'cue_out' => Application_Common_DateHelper::CalculateLengthInSeconds($item['cue_out']),
            'start' => $start,
            'end' => $end,
            'show_name' => $item['show_name'],
            'replay_gain' => $replay_gain,
            'filesize' => $filesize,
        ];

        if ($schedule_item['cue_in'] > $schedule_item['cue_out']) {
            $schedule_item['cue_in'] = $schedule_item['cue_out'];
        }
        self::appendScheduleItem($data, $start, $schedule_item);
    }

    private static function createStreamScheduleEvent(&$data, $item, $media_id, $uri)
    {
        $start = self::AirtimeTimeToPypoTime($item['start']);
        $end = self::AirtimeTimeToPypoTime($item['end']);

        // create an event to start stream buffering 5 seconds ahead of the streams actual time.
        $buffer_start = new DateTime($item['start'], new DateTimeZone('UTC'));
        $buffer_start->sub(new DateInterval('PT5S'));

        $stream_buffer_start = self::AirtimeTimeToPypoTime($buffer_start->format(DEFAULT_TIMESTAMP_FORMAT));

        $schedule_common = [
            'row_id' => $item['id'],
            'id' => $media_id,
            'uri' => $uri,
            'show_name' => $item['show_name'],
        ];

        $schedule_item = array_merge($schedule_common, [
            'start' => $stream_buffer_start,
            'end' => $stream_buffer_start,
            'type' => 'stream_buffer_start',
        ]);

        self::appendScheduleItem($data, $start, $schedule_item);

        $schedule_item = array_merge($schedule_common, [
            'start' => $start,
            'end' => $end,
            'type' => 'stream_output_start',
        ]);
        self::appendScheduleItem($data, $start, $schedule_item);

        // since a stream never ends we have to insert an additional "kick stream" event. The "start"
        // time of this event is the "end" time of the stream minus 1 second.
        $dt = new DateTime($item['end'], new DateTimeZone('UTC'));
        $dt->sub(new DateInterval('PT1S'));

        $stream_end = self::AirtimeTimeToPypoTime($dt->format(DEFAULT_TIMESTAMP_FORMAT));

        $schedule_item = array_merge($schedule_common, [
            'start' => $stream_end,
            'end' => $stream_end,
            'type' => 'stream_buffer_end',
        ]);
        self::appendScheduleItem($data, $stream_end, $schedule_item);

        $schedule_item = array_merge($schedule_common, [
            'start' => $stream_end,
            'end' => $stream_end,
            'type' => 'stream_output_end',
        ]);
        self::appendScheduleItem($data, $stream_end, $schedule_item);
    }

    private static function getRangeStartAndEnd($p_fromDateTime, $p_toDateTime)
    {
        $CC_CONFIG = Config::getConfig();

        $utcTimeZone = new DateTimeZone('UTC');

        /* if $p_fromDateTime and $p_toDateTime function parameters are null,
            then set range * from "now" to "now + 24 hours". */
        if (is_null($p_fromDateTime)) {
            $t1 = new DateTime('@' . time(), $utcTimeZone);
            $range_start = $t1->format(DEFAULT_TIMESTAMP_FORMAT);
        } else {
            $range_start = Application_Model_Schedule::PypoTimeToAirtimeTime($p_fromDateTime);
        }
        if (is_null($p_fromDateTime)) {
            $t2 = new DateTime('@' . time(), $utcTimeZone);

            $cache_ahead_hours = $CC_CONFIG['cache_ahead_hours'];

            if (is_numeric($cache_ahead_hours)) {
                // make sure we are not dealing with a float
                $cache_ahead_hours = intval($cache_ahead_hours);
            } else {
                $cache_ahead_hours = 1;
            }

            $t2->add(new DateInterval('PT' . $cache_ahead_hours . 'H'));
            $range_end = $t2->format(DEFAULT_TIMESTAMP_FORMAT);
        } else {
            $range_end = Application_Model_Schedule::PypoTimeToAirtimeTime($p_toDateTime);
        }

        return [$range_start, $range_end];
    }

    private static function createScheduledEvents(&$data, $range_start, $range_end)
    {
        $utcTimeZone = new DateTimeZone('UTC');
        $items = self::getItems($range_start, $range_end);

        foreach ($items as $item) {
            $showEndDateTime = new DateTime($item['show_end'], $utcTimeZone);

            $trackStartDateTime = new DateTime($item['start'], $utcTimeZone);
            $trackEndDateTime = new DateTime($item['end'], $utcTimeZone);

            if ($trackStartDateTime->getTimestamp() > $showEndDateTime->getTimestamp()) {
                // do not send any tracks that start past their show's end time
                continue;
            }

            if ($trackEndDateTime->getTimestamp() > $showEndDateTime->getTimestamp()) {
                $di = $trackStartDateTime->diff($showEndDateTime);

                $item['cue_out'] = $di->format('%H:%i:%s') . '.000';
                $item['end'] = $showEndDateTime->format(DEFAULT_TIMESTAMP_FORMAT);
            }

            if (!is_null($item['file_id'])) {
                // row is from "file"
                $media_id = $item['file_id'];
                $storedFile = Application_Model_StoredFile::RecallById($media_id);
                $file = $storedFile->getPropelOrm();
                // Even local files are downloaded through the REST API in case we need to transform
                // their filenames (eg. in the case of a bad file extension, because Liquidsoap won't play them)
                $uri = Config::getPublicUrl() . 'rest/media/' . $media_id;
                // $uri = $file->getAbsoluteFilePath();

                $filesize = $file->getFileSize();
                self::createFileScheduleEvent($data, $item, $media_id, $uri, $filesize);
            } elseif (!is_null($item['stream_id'])) {
                // row is type "webstream"
                $media_id = $item['stream_id'];
                $uri = $item['url'];
                self::createStreamScheduleEvent($data, $item, $media_id, $uri);
            }

            // throw new Exception("Unknown schedule type: ".print_r($item, true));
            // It's currently possible (and normal) to get cc_schedule rows without
            // a file_id or stream_id. If you're using linked shows, placeholder rows can be put
            // in the schedule when you cancel a track or delete stuff, so we should not throw an exception
            // here and instead just ignore it.
        }
    }

    // Check if two events are less than or equal to 1 second apart
    public static function areEventsLinked($event1, $event2)
    {
        $dt1 = DateTime::createFromFormat('Y-m-d-H-i-s', $event1['start']);
        $dt2 = DateTime::createFromFormat('Y-m-d-H-i-s', $event2['start']);

        $seconds = $dt2->getTimestamp() - $dt1->getTimestamp();

        return $seconds <= 1;
    }

    /**
     * Streams are a 4 stage process.
     * 1) start buffering stream 5 seconds ahead of its start time
     * 2) at the start time tell liquidsoap to switch to this source
     * 3) at the end time, tell liquidsoap to stop reading this stream
     * 4) at the end time, tell liquidsoap to switch away from input.http source.
     *
     * When we have two streams back-to-back, some of these steps are unnecessary
     * for the second stream. Instead of sending commands 1,2,3,4,1,2,3,4 we should
     * send 1,2,1,2,3,4 - We don't need to tell liquidsoap to stop reading (#3), because #1
     * of the next stream implies this when we pass in a new url. We also don't need #4.
     *
     * There's a special case here is well. When the back-to-back streams are the same, we
     * can collapse the instructions 1,2,(3,4,1,2),3,4 to 1,2,3,4. We basically cut out the
     * middle part. This function handles this.
     *
     * @param mixed $data
     */
    private static function foldData(&$data)
    {
        $previous_key = null;
        $previous_val = null;
        $previous_previous_key = null;
        $previous_previous_val = null;
        $previous_previous_previous_key = null;
        $previous_previous_previous_val = null;
        foreach ($data as $k => $v) {
            if (
                $v['type'] == 'stream_output_start'
                && !is_null($previous_previous_val)
                && $previous_previous_val['type'] == 'stream_output_end'
                && self::areEventsLinked($previous_previous_val, $v)
            ) {
                unset($data[$previous_previous_previous_key], $data[$previous_previous_key], $data[$previous_key]);

                if ($previous_previous_val['uri'] == $v['uri']) {
                    unset($data[$k]);
                }
            }

            $previous_previous_previous_key = $previous_previous_key;
            $previous_previous_previous_val = $previous_previous_val;
            $previous_previous_key = $previous_key;
            $previous_previous_val = $previous_val;
            $previous_key = $k;
            $previous_val = $v;
        }
    }

    public static function getSchedule($p_fromDateTime = null, $p_toDateTime = null)
    {
        // generate repeating shows if we are fetching the schedule
        // for days beyond the shows_populated_until value in cc_pref
        $needScheduleUntil = $p_toDateTime;
        if (is_null($needScheduleUntil)) {
            $needScheduleUntil = new DateTime('now', new DateTimeZone('UTC'));
            $needScheduleUntil->add(new DateInterval('P1D'));
        }
        Application_Model_Show::createAndFillShowInstancesPastPopulatedUntilDate($needScheduleUntil);
        [$range_start, $range_end] = self::getRangeStartAndEnd($p_fromDateTime, $p_toDateTime);

        $data = [];
        $data['media'] = [];

        // Harbor kick times *MUST* be ahead of schedule events, so that pypo
        // executes them first.
        self::createInputHarborKickTimes($data, $range_start, $range_end);
        self::createScheduledEvents($data, $range_start, $range_end);

        // self::foldData($data["media"]);
        return $data;
    }

    public static function deleteAll()
    {
        $sql = 'TRUNCATE TABLE cc_schedule';
        Application_Common_Database::prepareAndExecute(
            $sql,
            [],
            Application_Common_Database::EXECUTE
        );
    }

    public static function deleteWithFileId($fileId)
    {
        $sql = 'DELETE FROM cc_schedule WHERE file_id=:file_id';
        Application_Common_Database::prepareAndExecute($sql, [':file_id' => $fileId], 'execute');
    }

    public static function checkOverlappingShows(
        $show_start,
        $show_end,
        $update = false,
        $instanceId = null,
        $showId = null
    ) {
        // if the show instance does not exist or was deleted, return false
        if (!is_null($showId)) {
            $ccShowInstance = CcShowInstancesQuery::create()
                ->filterByDbShowId($showId)
                ->filterByDbStarts($show_start->format(DEFAULT_TIMESTAMP_FORMAT))
                ->findOne();
        } elseif (!is_null($instanceId)) {
            $ccShowInstance = CcShowInstancesQuery::create()
                ->filterByDbId($instanceId)
                ->findOne();
        }
        if ($update && ($ccShowInstance && $ccShowInstance->getDbModifiedInstance() == true)) {
            return false;
        }

        $overlapping = false;

        $params = [
            ':show_end1' => $show_end->format(DEFAULT_TIMESTAMP_FORMAT),
            ':show_end2' => $show_end->format(DEFAULT_TIMESTAMP_FORMAT),
            ':show_end3' => $show_end->format(DEFAULT_TIMESTAMP_FORMAT),
        ];

        /* If a show is being edited, exclude it from the query
         * In both cases (new and edit) we only grab shows that
         * are scheduled 2 days prior
         */
        if ($update) {
            $sql = <<<'SQL'
SELECT id,
       starts,
       ends
FROM cc_show_instances
WHERE (ends <= :show_end1
       OR starts <= :show_end2)
  AND date(starts) >= (date(:show_end3) - INTERVAL '2 days')
  AND modified_instance = FALSE
SQL;
            if (is_null($showId)) {
                $sql .= <<<'SQL'
  AND id != :instanceId
ORDER BY ends
SQL;
                $params[':instanceId'] = $instanceId;
            } else {
                $sql .= <<<'SQL'
  AND show_id != :showId
ORDER BY ends
SQL;
                $params[':showId'] = $showId;
            }
            $rows = Application_Common_Database::prepareAndExecute($sql, $params, 'all');
        } else {
            $sql = <<<'SQL'
SELECT id,
       starts,
       ends
FROM cc_show_instances
WHERE (ends <= :show_end1
       OR starts <= :show_end2)
  AND date(starts) >= (date(:show_end3) - INTERVAL '2 days')
  AND modified_instance = FALSE
ORDER BY ends
SQL;

            $rows = Application_Common_Database::prepareAndExecute($sql, [
                ':show_end1' => $show_end->format(DEFAULT_TIMESTAMP_FORMAT),
                ':show_end2' => $show_end->format(DEFAULT_TIMESTAMP_FORMAT),
                ':show_end3' => $show_end->format(DEFAULT_TIMESTAMP_FORMAT),
            ], 'all');
        }

        foreach ($rows as $row) {
            $start = new DateTime($row['starts'], new DateTimeZone('UTC'));
            $end = new DateTime($row['ends'], new DateTimeZone('UTC'));

            if (
                $show_start->getTimestamp() < $end->getTimestamp()
                && $show_end->getTimestamp() > $start->getTimestamp()
            ) {
                $overlapping = true;

                break;
            }
        }

        return $overlapping;
    }

    public static function GetType($p_scheduleId)
    {
        $scheduledItem = CcScheduleQuery::create()->findPK($p_scheduleId);
        if ($scheduledItem->getDbFileId() == null) {
            return 'webstream';
        }

        return 'file';
    }

    public static function GetFileId($p_scheduleId)
    {
        $scheduledItem = CcScheduleQuery::create()->findPK($p_scheduleId);

        return $scheduledItem->getDbFileId();
    }

    public static function GetStreamId($p_scheduleId)
    {
        $scheduledItem = CcScheduleQuery::create()->findPK($p_scheduleId);

        return $scheduledItem->getDbStreamId();
    }
}