<?php

namespace Vn\Web;

use Vn\Lib\Locale;

/**
 * Base class for services that sends response as HTML format.
 */
class HtmlService extends Service {
	function run() {
		$eFlag =
			  E_ERROR
			| E_USER_ERROR;

		set_error_handler([$this, 'errorHandler'], $eFlag);
		set_exception_handler([$this, 'errorHandler']);

		$this->init();
		$db = $this->db;

		if (!$this->isHttps()
		&& $db->getValue('SELECT https FROM config') && !_DEV_MODE) {
			header("Location: https://{$this->getUri()}");
			exit(0);
		}

		$this->startSession();

		// Getting the requested page

		if (!empty($_REQUEST['method']) && isHyphen($_REQUEST['method']))
			$page = $_REQUEST['method'];
		else
			$page = 'main';

		// Checking the browser version

		if (!isset($_SESSION['skipBrowser']) && $page != 'update-browser') {
			$updateBrowser = FALSE;

			if (!isset($_GET['skipBrowser'])
			&& isset($_SERVER['HTTP_USER_AGENT'])
			&& ($browser = get_browser($_SERVER['HTTP_USER_AGENT']))) {
				$browserVersion =(double) $browser->version;
				$minVersion = $db->getValue(
					'SELECT version FROM browser WHERE name = #', [$browser->browser]);
				$updateBrowser = $browserVersion > 0
					&& isset($minVersion) && $browserVersion < $minVersion;
			}

			if ($updateBrowser) {
				header('Location: ?method=update-browser');
				exit(0);
			} else
				$_SESSION['skipBrowser'] = TRUE;
		}

		// If enabled, requests the user to choose between two web versions

		if (!isset($_SESSION['skipVersionMenu'])
		&& $db->getValue('SELECT testDomain FROM config')) {
			$_SESSION['skipVersionMenu'] = TRUE;
			header('Location: ?method=version-menu');
		}

		// Loading the requested page

		$basePath =  "pages/$page";

		if (file_exists($basePath)) {
			Locale::addPath($basePath);

			$phpFile = "./$basePath/$page.php";

			if (file_exists($phpFile))
				require($phpFile);

			$this->printHeader();
			$dir = $basePath;
			include_once __DIR__.'/html.php';
			include("./$basePath/ui.php");
		} else
			header('Location: ./');
	}
	
	function printHeader() {
		header('Content-Type: text/html; charset=UTF-8');
		//header("Content-Security-Policy: default-src *; img-src *;");
	}

	function errorHandler($err) {
		error_log("{$err->getMessage()} {$err->getTraceAsString()}");
		$this->printHeader();
		include(__DIR__.'/unavailable.html');
		exit(0);
		return FALSE;
	}
	
	function isMobile() {
		$re = '/(Android|webOS|iPhone|iPad|iPod|BlackBerry|Windows Phone)/i';
		return preg_match($re, $_SERVER['HTTP_USER_AGENT']);
	}
}