var fs = require('fs');

module.exports = function(qwiki) {
  qwiki.rule('listing', '@@CONTENT@@', function(req, res, instance, next) {
    var article = req.area.substring(req.listing.length+2);
    if (article == '') {
      res.write('<div class="content_row" id="bot">');
      res.write('<div class="right">');
      res.write('<h1>'+(req.listing.charAt(0).toUpperCase()+req.listing.slice(1))+'</h1>');
      res.write('</div>');
      res.write('</div>');
      for (var i in qwiki.listings[req.listing]) {
        res.write('<div class="content_row" id="bot">');
        res.write('<div class="left">');
        res.write('<h2>'+qwiki.listings[req.listing][i].date+'</h2>');
        res.write('<h3>'+qwiki.listings[req.listing][i].time+'</h3>');
        res.write('</div>');
        res.write('<div class="right">');
        res.write('<a href="'+req.listing+'/'+i+'">'+qwiki.listings[req.listing][i].title+'</a>');
        res.write('</div>');
        res.write('</div>');
      }
      next();
    } else {
      var entry = qwiki.listings[req.listing][article];
      //article = article;
      var cache_path = 'cache/'+req.listing+'/'+article+'.html';
      var title = article;
      var date = '00-00-00';
      var time = '00:00:00';
      if (typeof entry !== 'undefined') {
        title = (typeof entry.title !== 'undefined' ? entry.title : article);
        date = (typeof entry.date !== 'undefined' ? entry.date : '0');
        time = (typeof entry.time !== 'undefined' ? entry.time : '0');
      }
      res.write('<div class="content_row" id="bot">');
      res.write('<div class="left">');
      res.write('<h2>'+date+'</h2>');
      res.write('<h3>'+time+'</h3>');
      res.write('</div>');
      res.write('<div class="right">');
      res.write('<h1>'+title+'</h1>');
      qwiki.readFile(res, cache_path, function(type, err) {
        if (type == 'FNF') {
          // cache does not exist - is there a wiki source?
          var wiki_path = 'wiki/'+req.listing+'/'+article+'.qwk';
          fs.stat(wiki_path, function(err, stats) {
            // TODO: stats.isFile()
            if (err && err.code == 'ENOENT') {
              // the wiki entry does not exist
              res.write(article + ' does not exist yet');
              res.write('</div></div>');
              next();
            } else if (err) {
              // error while statting wiki entry
              res.write(article + ': ' + err.code);
              res.write('</div></div>');
              next();
            } else {
              // wiki entry exists!
              fs.readFile(wiki_path, function(err, data) {
                if (err) {
                  res.write(article + ': ' + err.code);
                  res.write('</div></div>');
                  next();
                } else {
                  qwiki.convertAndSave(req.listing+'/'+article, (article in qwiki.wiki_index.pages ? qwiki.wiki_index.pages[article].format : qwiki.getDefault('format')), data, function() {
                    qwiki.readFile(res, wiki_path, function(type, err) {
                      if (type == 'FNF') {
                        res.write('error while creating cache');
                        res.write('</div></div>');
                        next();
                      } else if (err) {
                        res.write(article + ': ' + err.code);
                        res.write('</div></div>');
                        next();
                      } else {
                        res.write('</div></div>');
                        next();
                      }
                    });
                  });
                }
              });
            }
          });
        } else if (err) {
          res.write(article + ': ' + err.code);
          res.write('</div></div>');
          next();
        } else {
          res.write('</div></div>');
          next();
        }
      });
      }
  });
};