<?php

/** @file */

namespace Code\Daemon;

use Code\Lib\Config;
use Code\Lib\Libsync;
use Code\Lib\Addon;

class Cron implements DaemonInterface
{

    public function run(int $argc, array $argv): void
    {

        $maxsysload = intval(get_config('system', 'maxloadavg'));
        if ($maxsysload < 1) {
            $maxsysload = 50;
        }
        if (function_exists('sys_getloadavg')) {
            $load = sys_getloadavg();
            if (intval($load[0]) > $maxsysload) {
                logger('system: load ' . $load . ' too high. Cron deferred to next scheduled run.');
                return;
            }
        }

        // Check for a lockfile.  If it exists, but is over an hour old, it's stale.  Ignore it.
        $lockfile = 'cache/cron';
        if (
            (file_exists($lockfile)) && (filemtime($lockfile) > (time() - 3600))
            && (! get_config('system', 'override_cron_lockfile'))
        ) {
            logger("cron: Already running");
            return;
        }

        // Create a lockfile.  Needs two vars, but $x doesn't need to contain anything.
        $x = '';
        file_put_contents($lockfile, $x);

        logger('cron: start');

        // run queue delivery process in the background

        Run::Summon([ 'Queue' ]);

        Run::Summon([ 'Poller' ]);

        // maintenance for mod sharedwithme - check for updated items and remove them

        require_once('include/sharedwithme.php');
        apply_updates();

        // expire any expired items

        $r = q(
            "select id,item_wall from item where expires > '2001-01-01 00:00:00' and expires < %s 
			and item_deleted = 0 ",
            db_utcnow()
        );
        if ($r) {
            require_once('include/items.php');
            foreach ($r as $rr) {
                drop_item($rr['id'], (($rr['item_wall']) ? DROPITEM_PHASE1 : DROPITEM_NORMAL));
                if ($rr['item_wall']) {
                    // The notifier isn't normally invoked unless item_drop is interactive.
                    Run::Summon([ 'Notifier', 'drop', $rr['id'] ]);
                }
            }
        }


        // delete expired access tokens

        $r = q(
            "select atoken_id from atoken where atoken_expires > '%s' and atoken_expires < %s",
            dbesc(NULL_DATE),
            db_utcnow()
        );
        if ($r) {
            require_once('include/security.php');
            foreach ($r as $rr) {
                atoken_delete($rr['atoken_id']);
            }
        }

        // Ensure that every channel pings their directory occasionally.
        $interval = floatval(Config::Get('system','delivery_interval', 2));
        $r = q(
            "select channel_id from channel where channel_dirdate < %s - INTERVAL %s and channel_removed = 0",
            db_utcnow(),
            db_quoteinterval('7 DAY')
        );
        if ($r) {
            foreach ($r as $rr) {
                Run::Summon([ 'Directory', $rr['channel_id'], 'force' ]);
                if ($interval) {
                    @time_sleep_until(microtime(true) + (float) $interval);
                }
            }
        }

        // publish any applicable items that were set to be published in the future
        // (time travel posts). Restrict to items that have come of age in the last
        // couple of days to limit the query to something reasonable.

        $r = q(
            "select id from item where item_delayed = 1 and created <= %s  and created > '%s' ",
            db_utcnow(),
            dbesc(datetime_convert('UTC', 'UTC', 'now - 2 days'))
        );
        if ($r) {
            foreach ($r as $rr) {
                $x = q(
                    "update item set item_delayed = 0 where id = %d",
                    intval($rr['id'])
                );
                if ($x) {
                    $z = q(
                        "select * from item where id = %d",
                        intval($rr['id'])
                    );
                    if ($z) {
                        xchan_query($z);
                        $sync_item = fetch_post_tags($z);
                        Libsync::build_sync_packet(
                            $sync_item[0]['uid'],
                            [
                                'item' => [ encode_item($sync_item[0], true) ]
                            ]
                        );
                    }
                    Run::Summon([ 'Notifier','wall-new',$rr['id'] ]);
                }
            }
        }

        require_once('include/attach.php');
        attach_upgrade();

        $abandon_days = intval(get_config('system', 'account_abandon_days'));
        if ($abandon_days < 1) {
            $abandon_days = 0;
        }


        // once daily run birthday_updates and then expire in background

        // FIXME: add birthday updates, both locally and for xprof for use
        // by directory servers

        $d1 = intval(get_config('system', 'last_expire_day'));
        $d2 = intval(datetime_convert('UTC', 'UTC', 'now', 'd'));

        // Allow somebody to staggger daily activities if they have more than one site on their server,
        // or if it happens at an inconvenient (busy) hour.

        $h1 = intval(get_config('system', 'cron_hour'));
        $h2 = intval(datetime_convert('UTC', 'UTC', 'now', 'G'));


        if (($d2 != $d1) && ($h1 == $h2)) {
            Run::Summon([ 'Cron_daily' ]);
        }

        // update any photos which didn't get imported properly
        // This should be rare

        $r = q(
            "select xchan_photo_l, xchan_hash from xchan where xchan_photo_l != '' and xchan_photo_m = '' 
			and xchan_photo_date < %s - INTERVAL %s",
            db_utcnow(),
            db_quoteinterval('1 DAY')
        );
        if ($r) {
            require_once('include/photo_factory.php');
            foreach ($r as $rr) {
                $photos = import_remote_xchan_photo($rr['xchan_photo_l'], $rr['xchan_hash']);
                if ($photos) {
                    $x = q(
                        "update xchan set xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s'
						where xchan_hash = '%s'",
                        dbesc($photos[0]),
                        dbesc($photos[1]),
                        dbesc($photos[2]),
                        dbesc($photos[3]),
                        dbesc($rr['xchan_hash'])
                    );
                }
            }
        }

        $generation = 0;

        $restart    = false;

        if (($argc > 1) && ($argv[1] == 'restart')) {
            $restart = true;
            $generation = intval($argv[2]);
            if (! $generation) {
                return;
            }
        }

        Addon::reload_all();

        $d = datetime_convert();

        // TODO check to see if there are any cronhooks before wasting a process

        if (! $restart) {
            Run::Summon([ 'Cronhooks' ]);
        }

        set_config('system', 'lastcron', datetime_convert());

        //All done - clear the lockfile
        @unlink($lockfile);

        return;
    }
}