#!/usr/bin/php
<?php
if (php_sapi_name() !== 'cli')
	exit('Must be run from CLI');

// Initialization

const LF = "\n";

define('ROOT', dirname($_SERVER['SCRIPT_FILENAME']));

$use_pandoc = true;

if (isset($argv[1]))
	define('SITE', $argv[1]);
else
	define('SITE', getcwd());

if (isset($argv[2]))
	define('DESTINATION', $argv[2]);
else
	define('DESTINATION', 'dns');

if (file_exists(SITE . '/config.ini'))
	$config = parse_ini_file(SITE . '/config.ini');

if (!isset($config['css']))
	$config['css'] = 1;

if (!isset($config['header']))
	$config['header'] = false;

if (!isset($config['centerIndex']))
	$config['centerIndex'] = false;

if (!isset($config['defaultLang']))
	$config['defaultLang'] = '';

// Less > CSS
if ($config['css'] == true) {
	// Create CSS output directory if needed
	if (!file_exists(SITE . '/css'))
		mkdir(SITE . '/css', 0755);

	require ROOT . '/less.php/lib/Less/Autoloader.php';
	Less_Autoloader::register();

	$colorScheme = [
		'darkColor' => 'black',
		'lightColor' => 'white',
		'mainColor' => 'red',
	];

	$options = [
		'cache_dir' => SITE . '/css',
		'compress' => true,
	];

	if (file_exists(SITE . '/style.less'))
		$lessFiles = [ROOT . '/style.less' => '', SITE . '/style.less' => ''];
	else
		$lessFiles = [ROOT . '/style.less' => ''];

	define('CSS_FILENAME', Less_Cache::Get($lessFiles, $options, $colorScheme));
}

// Determine whether links need to use Onion or DNS
function clearnetOrOnion($clearnet_url, $onion_url) {
	return (DESTINATION === 'onion') ? $onion_url : $clearnet_url;
}

exec('find ' . SITE . "/src -name '*.gmi' -o -name '*.md'", $pages);

foreach ($pages as $page) {

	$pathParts = pathinfo(str_replace('/src', '', $page));

	// Create parent directory if needed
	if (!file_exists($pathParts['dirname']))
		mkdir($pathParts['dirname'], 0755, true);

	// Execute PHP code
	ob_start();
	eval('?>' . file_get_contents($page));
	file_put_contents($pathParts['dirname'] . '/' . $pathParts['basename'], ob_get_contents());
	ob_end_clean();

	// Convert Gemtext to Markdown
	if ($pathParts['extension'] === 'gmi') {
		$gmilines = explode(LF, file_get_contents($pathParts['dirname'] . '/' . $pathParts['basename']));

		foreach ($gmilines as $key => $line) {
			if (substr($line, 0, 2) === '=>') {
				preg_match('/=> +(.[^ ]+)/', $line, $lnUrl);
				preg_match('/=> +.[^ ]+ +(.+)/', $line, $lnTitle);

				$urlPathParts = pathinfo(parse_url($lnUrl[1], PHP_URL_PATH));

				// .gmi > .md for local links
				if (!str_contains($lnUrl[1], ':') AND $urlPathParts['extension'] === 'gmi') // If it's a local link
					$lnUrl[1] = $urlPathParts['dirname'] . '/' . $urlPathParts['filename'] . '.md';

				if (isset($lnTitle[1])) {
					$gmilines[$key] = '[' . $lnTitle[1] . '](' . $lnUrl[1] . ')';
				} else {
					$gmilines[$key] = '[' . $lnUrl[1] . '](' . $lnUrl[1] . ')';
				}
			}
		}
		$code = '';
		foreach ($gmilines as $line) {
			$code = $code . LF . $line;
		}
		file_put_contents($pathParts['dirname'] . '/' . $pathParts['filename'] . '.md', $code);
	}

	// Compile Markdown to HTML
	$markdown = file_get_contents($pathParts['dirname'] . '/' . $pathParts['filename'] . '.md');
	if (preg_match("/# (.*)\\n/", $markdown, $matches)) // If a main heading is found
		$title = $matches[1]; // Then it will be the HTML page <title>
	else
		$title = NULL;
	if ($use_pandoc) {
		$process = proc_open('pandoc --fail-if-warnings -f markdown -t html', [
			0 => ['pipe', 'r'],
			1 => ['pipe', 'w'],
		], $pipes);
		if (is_resource($process) !== true)
			exit('Can\'t spawn pandoc.');
		fwrite($pipes[0], $markdown);
		fclose($pipes[0]);
		$pageContent = fread($pipes[1], 1000);
		fclose($pipes[1]);
		if (proc_close($process) !== 0)
			exit('pandoc failed.');
	} else {
		require_once ROOT . '/parsedown/Parsedown.php';
		require_once ROOT . '/parsedown-extra/ParsedownExtra.php';
		$Parsedown = new ParsedownExtra;
		$Parsedown = $Parsedown->setUrlsLinked(false);
		$Parsedown = $Parsedown->setMarkupEscaped(false);
		$Parsedown = $Parsedown->setBreaksEnabled(true);
		$pageContent = $Parsedown->text($markdown);
	}

	// .md > .html for local links
	$pageContent = preg_replace('#<a href="(?!.*:)(.*)\.md">#', '<a href="$1.html">', $pageContent);

	// Add header and footer to HTML
	$urlPath = str_replace(SITE, '', $pathParts['dirname']);
	$relativePathToRoot = '';
	for ($i = substr_count($urlPath, '/') ; $i > 0 ; $i--)
		$relativePathToRoot .= '../';

	ob_start();

?>
	<!DOCTYPE html>
	<html lang="<?php

	preg_match('#\.([a-zA-Z-]{2,5})\.#', $pathParts['basename'], $lang);
	if (isset($lang[1])) {
		echo $lang[1];
	} else {
		preg_match('#/([a-z]{2})(/|$)#', $pathParts['dirname'], $lang);
		if (isset($lang[1]))
			echo $lang[1];
		else
			echo $config['defaultLang'];
	}

	 ?>">
		<head>
			<meta charset="utf-8">
			<?php
	if (isset($title) AND !is_null($title) AND isset($config['siteTitle']))
		echo '<title>' . $title . ' · ' . $config['siteTitle'] . '</title>';
	else if (isset($title) AND !is_null($title))
		echo '<title>' . $title . '</title>';
	else if (isset($config['siteTitle']))
		echo '<title>' . $config['siteTitle'] . '</title>';
			?>
			<meta name="viewport" content="width=device-width, initial-scale=1">
<?php
	if ($config['css'] == true)
		echo '<link rel="stylesheet" media="screen" href="' . $relativePathToRoot . 'css/' . CSS_FILENAME . '">' . LF;

	if (file_exists(SITE . '/head.inc.html'))
		echo file_get_contents(SITE . '/head.inc.html');
?>
		</head>

		<body>
<?php
	if ($config['header']) {
?>
			<header>
				<a href="./<?= $relativePathToRoot ?>">
<?php
		if (file_exists(SITE . '/img/logo.webp'))
			echo '<img src="img/logo.webp" ' . getimagesize(SITE . '/img/logo.webp')[3] . ' alt="' . $config['siteTitle'] . '" />';
		else
			echo $config['siteTitle'];
?>
				</a>
			</header>
<?php
	}

	if ($config['centerIndex'] AND $pathParts['filename'] === 'index')
		echo '<div class="centered">' . $pageContent . '</div>';
	else
		echo '<main>' . $pageContent . '</main>';
	if (file_exists(SITE . '/end.inc.html'))
		require SITE . '/end.inc.html';
	echo '</body></html>';

	$pageContent = ob_get_clean();

	if (extension_loaded('tidy')) {
		$tidy = new tidy;
		$tidy->parseString($pageContent, [
				'indent' => true,
				'keep-tabs' => true,
				'wrap' => 0
			]
		);
		$tidy->cleanRepair();
		$pageContent = tidy_get_output($tidy);
	} else {
		echo 'tidy extension unavailable' . PHP_EOL;
	}

	file_put_contents($pathParts['dirname'] . '/' . $pathParts['filename'] . '.html', $pageContent);

	// Gzip compression
	exec('gzip --keep --fast --force ' . $pathParts['dirname'] . '/' . $pathParts['filename'] . '.html');
}

ob_start();
}

if ($config['css'] == true)
	exec('gzip --keep --fast --force ' . SITE . '/css/' . CSS_FILENAME);