// Chat upload
// format sample
// http://utatane.tumblr.com/post/118386131/private-chat-format-test
 
(function(){
Tombloo.Service.extractors.register([
{ // Chat extractor
  name : 'Chat',
  ICON : models.Twitter.ICON,
  TARGET_BACKGROUND : '#888',
  TEMPLATE : (<><![CDATA[
  <dt class="account {even_or_odd}">{image point}
    <strong class="name"><a href="{account_url}">{account}</a></strong>
  </dt>
  <dd class="description {even_or_odd}">{body}<span class="source"><a href="{source}">{date}</a></span></dd>
]]></>).toString(),
  IMAGE_TEMPLATE : '\n    <span class="image"><a href="{account_url}"><img alt="{image_alt}" src="{image}" /></a></span>',
  extract : function(ctx, xpath){
    return this.select(xpath);
  },
  select : function(xpath, doc){
    var self = this;
    var deferred = new Deferred();
    doc = doc || currentDocument();
 
    var list = [];
    var now_target = null;
    function getChatElement(e){
      return $x(xpath, e.target);
    }
    function onMouseOver(e){
      var target = null;
      if((target = getChatElement(e)) && !target.captureSelected){
        now_target = target;
        target.originalBackground = target.style.background;
        target.style.background = self.TARGET_BACKGROUND;
      }
    }
    function onMouseOut(e){
      var target = null;
      if((target = getChatElement(e)) && !target.captureSelected){
        now_target = null;
        unpoint(target);
      }
    }
    function onClick(e){
      cancel(e);
      var target = null;
      if(target = getChatElement(e)){
        if(target.captureSelected = !target.captureSelected){
          list.push(target);
        } else {
          var index = list.indexOf(target);
          if(!(index === -1)){
            list.splice(index, 1);
          }
        }
      }
    }
    function onKeyDown(e){
      cancel(e);
 
      switch(keyString(e)){
      case 'ESCAPE':
        finalize();
        deferred.cancel();
        return;
      case 'RETURN':
        finalize();
        if(list.length){
          deferred.callback(list);
        } else {
          deferred.cancel();
        }
        return;
      }
    }
    function unpoint(elm){
      if(elm.originalBackground!=null){
        elm.style.background = elm.originalBackground;
        elm.originalBackground = null;
      }
    }
    function finalize(){
      doc.removeEventListener('mouseover', onMouseOver, true);
      doc.removeEventListener('mouseout', onMouseOut, true);
      doc.removeEventListener('click', onClick, true);
      doc.removeEventListener('keydown', onKeyDown, true);
 
      list.forEach(function(elm){
        elm.captureSelected = null;
        unpoint(elm);
      });
      if(now_target){
        now_target.captureSelected = null;
        unpoint(now_target);
      }
    }
 
    doc.addEventListener('mouseover', onMouseOver, true);
    doc.addEventListener('mouseout', onMouseOut, true);
    doc.addEventListener('click', onClick, true);
    doc.addEventListener('keydown', onKeyDown, true);
 
    return deferred;
  },
  createChat : function(list){
    chat = list.map(function(item, index){
      var text = this.TEMPLATE
        .replace(/{account}/g, this.escapeHTML(item.account))
        .replace(/{account_url}/g, item.account_url)
        .replace(/{source}/g, item.source)
        .replace(/{body}/g, this.escapeHTML(item.body))
        .replace(/{date}/g, (item.date)? this.escapeHTML(item.date) : 'src')
        .replace(/{even_or_odd}/g, ((index % 2)? 'even' : 'odd'));
      if(item.image){
        return text
          .replace(/{image point}/g, this.IMAGE_TEMPLATE
            .replace(/{image}/g, item.image)
            .replace(/{image_alt}/g, item.image_alt)
            .replace(/{account_url}/g, item.account_url)
            .replace(/{account}/g, this.escapeHTML(item.account))
          );
      } else {
        return text
          .replace(/{image point}/g, (item.alt || ""));
      }
    }, this);
 
    chat.unshift('<dl class="dialog">');
    chat.push('</dl>');
 
    return chat.join('\n');
  },
  escapeHTML : function(text){
    return text.replace(/&/g, '&amp;').replace(/\"/g, '&quot;').replace(/>/g, '&gt;').replace(/</g, '&lt;');
  }
},
{
  // STOT like twitter extractor
  name : 'Chat - Twitter',
  ICON : models.Twitter.ICON,
  li_xpath : 'ancestor-or-self::li[contains(concat(" ",@class," ")," hentry ")]',
  a_xpath : 'descendant::a[contains(concat(" ",@rel," ")," bookmark ")]',
  check : function(ctx){
    return ctx.href.match('https?://twitter.com/');
  },
  extract : function(ctx){
    var self = this;
    var Chat = Tombloo.Service.extractors.Chat;
    return Chat.extract(ctx, this.li_xpath).addCallback(function(list){
      return new DeferredList(list.map(function(li){
        var url = $x(self.a_xpath, li).href;
        return request(url).addCallback(function(res){
          var doc = convertToHTMLDocument(res.responseText);
          var account = url.match('http://twitter\\.com/([^/]+)')[1];
          var image = $x('descendant::div[@class="thumb"]/descendant::img//@src', doc);
          var text = $x('descendant::span[contains(concat(" ",normalize-space(@class)," ")," entry-content ")]//text()', doc, true).join("");
          return {
            account_url : 'http://twitter.com/' + account,
            account : account,
            source  : url,
            image   : image,
            image_alt: (/s/i.test(account.substr(-1, 1)))? (account + "' icon") : (account + "'s icon"),
            date    : url,
            body    : text,
          }
        });
      }));
    }).addCallback(function(resses){
      resses.forEach(function(res, index){
        if(!res[0]) throw "Chat - Twitter Request Error"
        resses[index] = res[1];
      });
      return {
        type : 'regular',
        item : ctx.title,
        description : Chat.createChat(resses)
      };
    });
  },
}
]);
})();