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

define("FIND", "/usr/bin/find");
define("GZIP", "/usr/bin/gzip");

define("ROOT", dirname($_SERVER['SCRIPT_FILENAME']));
define("SITE", $argv[1]);
if (isset($argv[2]))
  define("DESTINATION", $argv[2]);
else
  define("DESTINATION", "local");

if (isset($argv[3]))
  define("SITE_TITLE", $argv[3]);
else
  define("SITE_TITLE", SITE);

require ROOT . "/bibli/parsedown/Parsedown.php";
require ROOT . "/bibli/parsedown-extra/ParsedownExtra.php";

// Less > CSS
require ROOT . "/bibli/less.php/lib/Less/Autoloader.php";
Less_Autoloader::register();
$options = array('cache_dir' => SITE . '/css', 'compress' => true);

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

define("CSS_FILENAME", Less_Cache::Get($lessFiles, $options));

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

require "inc/url.php";

foreach ($pages as $page) {

  $pathParts = pathinfo($page);

  // Convert Gemtext to Markdown
  if ($pathParts['extension'] === "gmi") {
    $gmilines = explode("\n", file_get_contents($page));

    if (substr($gmilines[0], 0, 2) === "# ")
      $title = substr($gmilines[0], 2);
    else
      $title = NULL;

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

        // Escape Markdown special characters
        $mdSpecial = array("[", "]", "(", ")");
        $htmlEntities = array("&#91;", "&#93;", "&#40;", "&#41;");
        $lnUrl[1] = str_replace($mdSpecial, $htmlEntities, $lnUrl[1]);

        $urlPathParts = pathinfo(parse_url($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])) {
          $lnTitle[1] = str_replace($mdSpecial, $htmlEntities, $lnTitle[1]);
          $gmilines[$key] = "[" . $lnTitle[1] . "](" . $lnUrl[1] . ")";
        } else {
          $gmilines[$key] = "[" . $lnUrl[1] . "](" . $lnUrl[1] . ")";
        }
      }
    }
    $code = "";
    foreach ($gmilines as $line) {
      $code = $code . "\n" . $line;
    }
    file_put_contents($pathParts['dirname'] . "/" . $pathParts['filename'] . ".md", $code);
  }


  // Execute PHP code
  ob_start();
  eval("?>" . file_get_contents($pathParts['dirname'] . "/" . $pathParts['filename'] . ".md"));
  $pageContent = ob_get_contents();
  ob_end_clean();


  // Compile Markdown to HTML with Parsedown
  $Parsedown = new ParsedownExtra;
  $Parsedown = $Parsedown->setUrlsLinked(false);
  $Parsedown = $Parsedown->setMarkupEscaped(false);
  $Parsedown = $Parsedown->setBreaksEnabled(true);
  $pageContent = $Parsedown->text($pageContent);


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


  // Add header and footer to HTML

  ob_start();

  require "inc/debut.php";
  if ($pathParts['filename'] === "index") {
    echo "<div class='centre'>";
  } else {
    echo "<article>";
  }
  echo $pageContent;
  if ($pathParts['filename'] === "index") {
    echo "</div>";
  } else {
    echo "</article>";
  }
  require "inc/footer.php";
  file_put_contents($pathParts['dirname'] . "/" . $pathParts['filename'] . ".html", ob_get_contents());
  ob_end_clean();


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

exec(GZIP . " --keep --fast --force " . SITE . "/css/" . CSS_FILENAME);