<?php

namespace ManiaControl;

use ManiaControl\Admin\ActionsMenu;
use ManiaControl\Admin\AuthenticationManager;
use ManiaControl\Callbacks\CallbackManager;
use ManiaControl\Commands\CommandListener;
use ManiaControl\Commands\CommandManager;
use ManiaControl\Configurators\Configurator;
use ManiaControl\Manialinks\ManialinkManager;
use ManiaControl\Maps\MapManager;
use ManiaControl\Players\Player;
use ManiaControl\Players\PlayerManager;
use ManiaControl\Plugins\PluginManager;
use ManiaControl\Server\Server;
use ManiaControl\Statistics\StatisticManager;
use Maniaplanet\DedicatedServer\Connection;
use Maniaplanet\DedicatedServer\Xmlrpc\Exception;

require_once __DIR__ . '/Maniaplanet/DedicatedServer/Connection.php';
require_once __DIR__ . '/Callbacks/CallbackListener.php';
require_once __DIR__ . '/Commands/CommandListener.php';
require_once __DIR__ . '/Manialinks/ManialinkPageAnswerListener.php';
require_once __DIR__ . '/Admin/ActionsMenu.php';
require_once __DIR__ . '/Admin/AuthenticationManager.php';
require_once __DIR__ . '/Callbacks/CallbackManager.php';
require_once __DIR__ . '/Chat.php';
require_once __DIR__ . '/ColorUtil.php';
require_once __DIR__ . '/Commands/CommandManager.php';
require_once __DIR__ . '/Commands/HelpManager.php';
require_once __DIR__ . '/Configurators/Configurator.php';
require_once __DIR__ . '/Database.php';
require_once __DIR__ . '/FileUtil.php';
require_once __DIR__ . '/Formatter.php';
require_once __DIR__ . '/GbxDataFetcher/gbxdatafetcher.inc.php';
require_once __DIR__ . '/ManiaExchange/mxinfofetcher.inc.php';
require_once __DIR__ . '/ManiaExchange/ManiaExchangeManager.php';
require_once __DIR__ . '/Manialinks/ManialinkManager.php';
require_once __DIR__ . '/Statistics/StatisticManager.php';
require_once __DIR__ . '/Maps/MapManager.php';
require_once __DIR__ . '/Players/PlayerManager.php';
require_once __DIR__ . '/Plugins/PluginManager.php';
require_once __DIR__ . '/Server/Server.php';
require_once __DIR__ . '/Settings/SettingManager.php';
require_once __DIR__ . '/UpdateManager.php';

/**
 * ManiaControl Server Controller for ManiaPlanet Server
 *
 * @author steeffeen & kremsy
 */
class ManiaControl implements CommandListener {
	/**
	 * Constants
	 */
	const VERSION     = '0.01';
	const API_VERSION = '2013-04-16';
	const OS_UNIX     = 'Unix';
	const OS_WIN      = 'Windows';

	/**
	 * Public properties
	 */
	public $actionsMenu = null;
	public $authenticationManager = null;
	public $callbackManager = null;
	public $chat = null;
	public $config = null;
	public $configurator = null;
	/** @var Connection $client */
	public $client = null;
	public $commandManager = null;
	public $database = null;
	public $manialinkManager = null;
	public $mapManager = null;
	public $playerManager = null;
	public $pluginManager = null;
	public $server = null;
	public $settingManager = null;
	public $statisticManager = null;
	public $updateManager = null;

	/**
	 * Private properties
	 */
	private $shutdownRequested = false;

	/**
	 * Construct ManiaControl
	 */
	public function __construct() {
		$this->log('Loading ManiaControl v' . self::VERSION . '...');

		// Load config
		$this->config = FileUtil::loadConfig('server.xml');

		// Load ManiaControl Modules
		$this->database              = new Database($this);
		$this->callbackManager       = new CallbackManager($this);
		$this->settingManager        = new SettingManager($this);
		$this->statisticManager      = new StatisticManager($this);
		$this->manialinkManager      = new ManialinkManager($this);
		$this->actionsMenu           = new ActionsMenu($this);
		$this->chat                  = new Chat($this);
		$this->commandManager        = new CommandManager($this);
		$this->server                = new Server($this);
		$this->authenticationManager = new AuthenticationManager($this);
		$this->playerManager         = new PlayerManager($this);
		$this->mapManager            = new MapManager($this);
		$this->configurator          = new Configurator($this);
		$this->pluginManager         = new PluginManager($this);
		$this->updateManager         = new UpdateManager($this);

		// Register for commands
		$this->commandManager->registerCommandListener('version', $this, 'command_Version');
		$this->commandManager->registerCommandListener('restart', $this, 'command_Restart', true);
		$this->commandManager->registerCommandListener('shutdown', $this, 'command_Shutdown', true);
	}

	/**
	 * Print a message to console and log
	 *
	 * @param string $message
	 */
	public function log($message, $stripCodes = false) {
		$date = date("d.M y H:i:s");
		if($stripCodes) {
			$message = Formatter::stripCodes($message);
		}
		logMessage($date . ' ' . $message);
	}

	/**
	 * Get the Operating System on which ManiaControl is running
	 *
	 * @param string $compareOS
	 * @return string
	 */
	public function getOS($compareOS = null) {
		$windows = defined('PHP_WINDOWS_VERSION_MAJOR');
		if($compareOS) {
			// Return bool whether OS equals $compareOS
			if($compareOS == self::OS_WIN) {
				return $windows;
			}
			return !$windows;
		}
		// Return OS
		if($windows) {
			return self::OS_WIN;
		}
		return self::OS_UNIX;
	}

	/**
	 * Return message composed of client error message and error code
	 *
	 * @param object $client
	 * @return string
	 */
	public function getClientErrorText($client = null) {
		/*if(is_object($client)) {
			return $client->getErrorMessage() . ' (' . $client->getErrorCode() . ')';
		}
		return $this->client->getErrorMessage() . ' (' . $this->client->getErrorCode() . ')';*/
		//TODO

	}

	/**
	 * Handle Version Command
	 *
	 * @param array  $chatCallback
	 * @param Player $player
	 */
	public function command_Version(array $chatCallback, Player $player) {
		$message = 'This server is using ManiaControl v' . ManiaControl::VERSION . '!';
		$this->chat->sendInformation($message, $player->login);
	}

	/**
	 * Handle Restart AdminCommand
	 *
	 * @param array  $chatCallback
	 * @param Player $player
	 */
	public function command_Restart(array $chatCallback, Player $player) {
		if(!AuthenticationManager::checkRight($player, AuthenticationManager::AUTH_LEVEL_SUPERADMIN)) {
			$this->authenticationManager->sendNotAllowed($player);
			return;
		}
		$this->restart("ManiaControl Restart requested by '{$player->login}'!");
	}

	/**
	 * Handle //shutdown command
	 *
	 * @param array  $chat
	 * @param Player $player
	 */
	public function command_Shutdown(array $chat, Player $player) {
		if(!$this->authenticationManager->checkRight($player, AuthenticationManager::AUTH_LEVEL_SUPERADMIN)) {
			$this->authenticationManager->sendNotAllowed($player);
			return;
		}
		$this->quit("ManiaControl Shutdown requested by '{$player->login}'!");
	}

	/**
	 * Quit ManiaControl and log the given message
	 *
	 * @param string $message
	 */
	public function quit($message = null) {
		if($message) {
			$this->log($message);
		}
		exit();
	}

	/**
	 * Handle PHP Process Shutdown
	 */
	public function handleShutdown() {
		// OnShutdown callback
		$this->callbackManager->triggerCallback(CallbackManager::CB_MC_ONSHUTDOWN, array(CallbackManager::CB_MC_ONSHUTDOWN));

		// Announce quit
		$this->chat->sendInformation('ManiaControl shutting down.');

		// Hide manialinks
		$this->client->sendHideManialinkPage();


		//TODO: $this->client->delete()

		// Close connection
		//$this->client->Terminate();

		$this->log('Quitting ManiaControl!');
		exit();
	}

	/**
	 * Restart ManiaControl
	 *
	 * @param string $message
	 */
	public function restart($message = null) {
		// Shutdown callback
		$this->callbackManager->triggerCallback(CallbackManager::CB_MC_ONSHUTDOWN, array(CallbackManager::CB_MC_ONSHUTDOWN));

		// Announce restart
		$this->chat->sendInformation('Restarting ManiaControl...');
		if($message) {
			$this->log($message);
		}

		// Hide widgets
		$this->client->sendHideManialinkPage();

		// Close connection
		//$this->client->Terminate(); //TODO

		$this->log('Restarting ManiaControl!');

		// Execute start script in background
		if($this->getOS(self::OS_UNIX)) {
			$command = 'sh ' . escapeshellarg(ManiaControlDir . '/ManiaControl.sh') . ' > /dev/null &';
			exec($command);
		} else {
			// TODO: validate restart on windows
			$command = 'start /B ' . escapeshellarg(ManiaControlDir . '/ManiaControl.bat');
			pclose(popen($command, 'r'));
		}

		exit();
	}

	/**
	 * Run ManiaControl
	 */
	public function run() {
		$this->log('Starting ManiaControl v' . self::VERSION . '!');

		// Load plugins
		$this->pluginManager->loadPlugins();

		// Connect to server
		$this->connect();

		// Register shutdown handler
		register_shutdown_function(array($this, 'handleShutdown'));

		// OnInit callback
		$this->callbackManager->triggerCallback(CallbackManager::CB_MC_ONINIT, array(CallbackManager::CB_MC_ONINIT));

		// Announce ManiaControl
		$this->chat->sendInformation('ManiaControl v' . self::VERSION . ' successfully started!');

		// Loading finished
		$this->log('Loading completed!');

		// Main loop
		while(!$this->shutdownRequested) {
			$loopStart = microtime(true);

			// Disable script timeout
			set_time_limit(30);

			// Manager callbacks
			$this->callbackManager->manageCallbacks();

			// Yield for next tick
			$loopEnd   = microtime(true);
			$sleepTime = 300000 - $loopEnd + $loopStart;
			if($sleepTime > 0) {
				usleep($sleepTime);
			}
		}

		//Close the client connection
		//$this->client->Terminate();

		// Shutdown
		$this->quit();
	}

	/**
	 * Connect to ManiaPlanet server
	 */
	private function connect() {
		// Load remote client
		$host = $this->config->server->xpath('host');
		if(!$host) {
			trigger_error("Invalid server configuration (host).", E_USER_ERROR);
		}
		$host = (string)$host[0];
		$port = $this->config->server->xpath('port');
		if(!$host) {
			trigger_error("Invalid server configuration (port).", E_USER_ERROR);
		}
		$port = (string)$port[0];

		$this->log("Connecting to server at {$host}:{$port}...");

		$login = $this->config->server->xpath('login');
		if(!$login) {
			trigger_error("Invalid server configuration (login).", E_USER_ERROR);
		}
		$login = (string)$login[0];
		$pass  = $this->config->server->xpath('pass');
		if(!$pass) {
			trigger_error("Invalid server configuration (password).", E_USER_ERROR);
		}
		$pass = (string)$pass[0];

		//TODO timeout as constant
		try {
			$this->client = Connection::factory($host, $port, 20, $login, $pass);
		} catch(Exception $e) {
			trigger_error("Couldn't authenticate on server with user '{$login}'! " . $e->getMessage(), E_USER_ERROR);
		}

		// Enable callback system
		try {
			$this->client->enableCallbacks(true);
		} catch(Exception $e) {
			trigger_error("Couldn't enable callbacks! " . $e->getMessage(), E_USER_ERROR);
		}

		// Wait for server to be ready
		if(!$this->server->waitForStatus(4)) {
			trigger_error("Server couldn't get ready!", E_USER_ERROR);
		}

		// Set api version
		/*	if(!$this->client->query('SetApiVersion', self::API_VERSION)) {
				trigger_error("Couldn't set API version '" . self::API_VERSION . "'! This might cause problems. " . $this->getClientErrorText());
			}*/

		// Connect finished
		$this->log("Server Connection successfully established!");

		// Hide old widgets
		$this->client->sendHideManialinkPage();

		// Enable script callbacks if needed
		if($this->server->getGameMode() != 0) {
			return;
		}

		try {
			$scriptSettings = $this->client->getModeScriptSettings();
		} catch(Exception $e) {
			trigger_error("Couldn't get mode script settings. " . $e->getMessage());
			return;
		}

		if(!array_key_exists('S_UseScriptCallbacks', $scriptSettings)) {
			return;
		}

		$scriptSettings['S_UseScriptCallbacks'] = true;
		try {
			$this->client->setModeScriptSettings($scriptSettings);
		} catch(Exception $e) {
			trigger_error("Couldn't set mode script settings to enable script callbacks. " . $this->getClientErrorText());
			return;
		}
		$this->log('Script Callbacks successfully enabled!');
	}
}