var fs = require('fs');
module.exports = function(qwiki) {
  qwiki.rule('edit', '@@CONTENT@@', function(req, res, instance, next) {
    var area = (req.area == '' ? 'front' : req.area);
    var path = 'wiki/'+area+'.qwk';
    res.write('<form action="" method="POST"><div class="edit"><div><label for="page"><span>This is the page name that corresponds to the wiki URL, e.g., my_page => kettek.net/qwiki/my_page</span>Page</label> <input type="text" name="page" value="'+area+'"></div>');
    res.write('<div><label for="format"><span>This is the data format of content source, such as HTML or raw.</span>Format</label> <select name="format">');
    for (var format in qwiki.formats) {
      var page_format = (typeof qwiki.wiki_index.pages[area] !== 'undefined' ? qwiki.wiki_index.pages[area].format : qwiki.getDefault('format'));
      res.write('<option ' + (qwiki.formats[format].name == page_format ? 'selected ' : '') + 'value="'+qwiki.formats[format].name+'">'+qwiki.formats[format].fullname+'</option>');
    }
    res.write('</select></div>');
    res.write('</div><div id="edit_content"><label for="content">Content<span>This is the content of the wiki page</span></label> <textarea name="content">');
    qwiki.readFile(res, path, function(type, err) {
      if (type == 'FNF') {
      } else if (err) {
        res.write(err);
      }
      res.write('</textarea></div><div class="prompt"><input type="submit" name="submit" value="cancel"><input type="submit" name="submit" value="save"></div></form>');
      next();
    });
  });
  qwiki.rule('edit', '@@CONTROLS@@', function(req, res, instance, next) {
    res.write('<li><a href="'+(req.area == '' ? '/' : req.area)+'"><img src="/view.png">View</a></li><li><a href="'+req.area+'/revisions"><img src="/revisions.png">Revisions</a></li><li><a href="'+req.area+'/delete"><img src="/delete.png">Delete</a></li>');
    next();
  });
  qwiki.act('edit', function(req, res) {
    var area = (req.area == '' ? 'front' : req.area);
    // handle POST
    if ('submit' in req.fields && req.fields['submit'] == 'save') {
      var old_area = area;
      if ('page' in req.fields) {
        area = req.fields['page'];
      }
  
      if (typeof qwiki.wiki_index.pages[area] == 'undefined') {
        qwiki.wiki_index.pages[area] = {
          format: qwiki.getDefault('format')
        };
      }
      // get our format
      if ('format' in req.fields) {
        qwiki.wiki_index.pages[area].format = req.fields['format'];
      }
      //
      console.log(old_area + ' vs ' + area);
      if (old_area != area) {
        fs.rename('wiki/'+old_area+'.qwk', 'wiki/'+area+'.qwk', function() {
          qwiki.deleteCache(old_area, function() {
            if ('content' in req.fields) {
              qwiki.savePage(area, req.fields['content'], function(err) {
                if (err) {
                  res.write(err.code);
                  res.end();
                } else {
                  qwiki.createCache(area, req.fields['content'], function(err) {
                    if (err) {
                      res.write(err.code);
                      res.end();
                    } else {
                      res.writeHead(302, {'Location': '/'+area+'/edit'});
                      res.end();
                    }
                  });
                }
              });
            }
          });
        });
      } else {
        if ('content' in req.fields) {
          qwiki.savePage(area, req.fields['content'], function(err) {
            if (err) {
              res.write(err.code);
              res.end();
            } else {
              qwiki.createCache(area, req.fields['content'], function(err) {
                if (err) {
                  res.write(err.code);
                  res.end();
                } else {
                  res.writeHead(302, {'Location': req.url});
                  res.end();
                }
              });
            }
          });
        }
      }
      return;
    }
    res.writeHead(200, "OK", {
      "Content-Type": "text/html",
    });
    qwiki.parsePage('edit', '', req, res);
  });
};