<?php

/**
 * Class with static functions that are called when a specific event
 * took place, like the server has been booted, or the interface address
 * has been changed.
 * In contrast to the trigger class, this class should contain functions
 * for things that happen semi-automatically in reaction to something else
 * (which in turn might have been triggered explicitly).
 */
class Event
{

	/**
	 * Called when the system (re)booted. Could be implemented
	 * by a @reboot entry in crontab (running as the same user php does)
	 */
	public static function systemBooted()
	{
		EventLog::info('System boot...');
		$everythingFine = true;

		// Delete job entries that might have been running when system rebooted
		Property::clearList('cron.key.status');
		Property::clearList('cron.key.blocked');

		// Do this before any hooks, might be used by some
		$autoIp = Trigger::autoUpdateServerIp();

		// Hooks
		foreach (Hook::load('bootup') as $hook) {
			// Isolate for local vars
			$fun = function() use ($hook) {
				include_once($hook->file);
			};
			$fun();
		}

		// TODO: Modularize (hooks)

		// Tasks: fire away
		$mountStatus = false;
		$mountId = Trigger::mount();
		$ipxeId = Trigger::ipxe();

		// Check status of all tasks
		// Mount vm store
		if ($mountId === false) {
			EventLog::info('No VM store type defined.');
			$everythingFine = false;
		} else {
			$mountStatus = Taskmanager::waitComplete($mountId, 5000);

		}
		// Primary IP address
		if (!$autoIp) {
			EventLog::failure("The server's IP address could not be determined automatically, and there is no valid address configured.");
			$everythingFine = false;
		}
		// iPXE generation
		if ($ipxeId === false) {
			EventLog::failure('Cannot generate PXE menu: Taskmanager unreachable!');
			$everythingFine = false;
		} else {
			$res = Taskmanager::waitComplete($ipxeId, 5000);
			if (Taskmanager::isFailed($res)) {
				EventLog::failure('Update PXE Menu failed', $res['data']['error'] ?? $res['data']['error'] ?? '');
				$everythingFine = false;
			}
		}

		if ($mountStatus !== false && !Taskmanager::isFinished($mountStatus)) {
			$mountStatus = Taskmanager::waitComplete($mountStatus, 5000);
		}
		if (Taskmanager::isFailed($mountStatus)) {
			// One more time, network could've been down before
			sleep(10);
			$mountId = Trigger::mount();
			$mountStatus = Taskmanager::waitComplete($mountId, 10000);
		}
		if ($mountId !== false && Taskmanager::isFailed($mountStatus)) {
			EventLog::failure('Mounting VM store failed', $mountStatus['data']['messages'] ?? '');
			$everythingFine = false;
		} elseif ($mountId !== false && !Taskmanager::isFinished($mountStatus)) {
			// TODO: Still running - create callback
		}

		// Just so we know booting is done (and we don't expect any more errors from booting up)
		if ($everythingFine) {
			EventLog::info('Bootup finished without errors.');
		} else {
			EventLog::warning('There were errors during bootup. Maybe the server is not fully configured yet.');
		}
	}

	/**
	 * Server's primary IP address changed.
	 */
	public static function serverIpChanged()
	{
		Trigger::ipxe();
		if (Module::isAvailable('sysconfig')) { // TODO: Modularize events
			ConfigModule::serverIpChanged();
		}
	}


}