(function(){

$.expr[':'].icontains = function(obj, index, meta, stack){
return (obj.textContent || obj.innerText || jQuery(obj).text() || '').toLowerCase().indexOf(meta[3].toLowerCase()) >= 0;
};

// ##########
Navbar = {
  get el(){
    var win = Utils.activeWindow;
    var navbar = win.gBrowser.ownerDocument.getElementById("navigator-toolbox");
    return navbar;      
  },
  show: function(){ this.el.collapsed = false; },
  hide: function(){ this.el.collapsed = true;}
}

// ##########
var Tabbar = {
  get el(){ return window.Tabs[0].raw.parentNode; },
  hide: function(){ this.el.collapsed = true },
  show: function(){ this.el.collapsed = false }
}

// ##########
window.TabItem = function(container, tab) {
  this.container = container;
  this.tab = tab;
}

window.TabItem.prototype = {
  // ----------
  getBounds: function() {
    return Utils.getBounds(this.container);
  },
  
  // ----------
  setPosition: function(left, top) {
    $(this.container).animate({left: left, top: top});
  },
}

// ##########
var Page = {
  init: function() {
    var self = this;
    
    function mod($div, tab){
      if(window.Groups) {        
        $div.draggable(window.Groups.dragOptions);
        $div.droppable(window.Groups.dropOptions);
      }
      
      $div.mousedown(function(e) {
        if(!Utils.isRightClick(e))
          self.lastMouseDownTarget = e.target;
      });
        
      $div.mouseup(function(e) { 
        var same = (e.target == self.lastMouseDownTarget);
        self.lastMouseDownTarget = null;
        if(!same)
          return;
          
        if(e.target.className == "close") {
          $(this).find("canvas").data("link").tab.close(); }
        else {
          if(!$(this).data('isDragging')) {
            var ffVersion = parseFloat(navigator.userAgent.match(/\d{8}.*(\d\.\d)/)[1]);
            if( ffVersion < 3.7 ) Utils.error("css-transitions require Firefox 3.7+");
            
            // ZOOM! 
            var [w,h,z] = [$(this).width(), $(this).height(), $(this).css("zIndex")];
            var origPos = $(this).position();
            var zIndex = $(this).css("zIndex");
            var scale = window.innerWidth/w;
            
            var tab = Tabs.tab(this);
            var mirror = tab.mirror;
            //mirror.forceCanvasSize(w * scale/3, h * scale);
            
            var overflow = $("body").css("overflow");
            $("body").css("overflow", "hidden");

            $(this).css("zIndex",99999).animate({
              top: -10, left: 0, easing: "easein",
              width:w*scale, height:h*scale}, 200, function(){
                $(this).find("canvas").data("link").tab.focus();
                $(this)
                  .css({top: origPos.top, left: origPos.left, width:w, height:h, zIndex:z});  
                Navbar.show();    
                $("body").css("overflow", overflow);          
              });
            
            // I'm temporarily giving up on CSS-Transforms and Firefox 3.7.
            // It introduces way to many errors... -- Aza
            
            /*$(this).addClass("scale-animate").css({
              top: 0, left: 0,
              width:w*scale, height:h*scale,
              zIndex: 999999
            }).bind("transitionend", function(e){
              // We will get one of this events for every property CSS-animated...
              // I chose one randomly (width) and only do things for that.
              if( e.originalEvent.propertyName != "width" ) return;
              // Switch tabs, and the re-size and re-position the animated
              // tab image.
              // Don't forget to unbind the transitioned event handler!
              $(this).unbind("transitionend");
              $(this).find("canvas").data("link").tab.focus();
              $(this)
                .removeClass("scale-animate")
                .css({top: origPos.top, left: origPos.left, width:w, height:h, zIndex:zIndex})
                .unbind("transitionend");
              Navbar.show();
              //mirror.unforceCanvasSize();
            })*/
            // END ZOOM
            
          } else {
            $(this).find("canvas").data("link").tab.raw.pos = $(this).position();
          }
        }
      });
      
      $("<div class='close'>x</div>").appendTo($div);

      if(Arrange.initialized) {
        var p = Page.findOpenSpaceFor($div);
        $div.css({left: p.x, top: p.y});
      }
      
      $div.each(function() {
        $(this).data('tabItem', new TabItem(this, Tabs.tab(this)));
      });
      
      // TODO: Figure out this really weird bug?
      // Why is that:
      //    $div.find("canvas").data("link").tab.url
      // returns chrome://tabcandy/content/candies/original/index.html for
      // every $div (which isn't right), but that
      //   $div.bind("test", function(){
      //      var url = $(this).find("canvas").data("link").tab.url;
      //   });
      //   $div.trigger("test")
      // returns the right result (i.e., the per-tab URL)?
      // I'm so confused...
      // Although I can use the trigger trick, I was thinking about
      // adding code in here which sorted the tabs into groups.
      // -- Aza
    }
    
    window.TabMirror.customize(mod);
    
    Utils.homeTab.raw.maxWidth = 60;
    Utils.homeTab.raw.minWidth = 60;
    
    Tabs.onClose(function(){
      Utils.homeTab.focus();
      return false;
    });
    
    var lastTab = null;
    Tabs.onFocus(function(){
      // If we switched to TabCandy window...
      if( this.contentWindow == window && lastTab != null && lastTab.mirror != null){
        // If there was a lastTab we want to animate
        // its mirror for the zoom out.
        var $tab = $(lastTab.mirror.el);
        
        var [w,h, pos, z] = [$tab.width(), $tab.height(), $tab.position(), $tab.css("zIndex")];
        var scale = window.innerWidth / w;

        var overflow = $("body").css("overflow");
        $("body").css("overflow", "hidden");
        
        var mirror = lastTab.mirror;
        $tab.css({
            top: 0, left: 0,
            width: window.innerWidth,
            height: h * (window.innerWidth/w),
            zIndex: 999999,
        }).animate({
            top: pos.top, left: pos.left,
            width: w, height: h
        },250, '', function() {
          $tab.css("zIndex",z);
          $("body").css("overflow", overflow);
        });
      }
      lastTab = this;
    });
    
    $("#tabbar").toggle(
      function(){Tabbar.hide()},
      function(){Tabbar.show()}      
    );
  },
  
  findOpenSpaceFor: function($div) {
    var w = window.innerWidth;
    var h = 0;
    var startX = 30;
    var startY = 100;
    var bufferX = 30;
    var bufferY = 30;
    var rects = [];
    var r;
    var $el;
    $(".tab:visible").each(function(i) {
      if(this == $div.get(0))
        return;
        
      $el = $(this);
      r = {x: parseInt($el.css('left')),
        y: parseInt($el.css('top')),
        w: parseInt($el.css('width')) + bufferX,
        h: parseInt($el.css('height')) + bufferY};
        
      if(r.x + r.w > w)
        w = r.x + r.w;

      if(r.y + r.h > h)
        h = r.y + r.h;
  
      rects.push(r);
    });

    if(!h) 
      return { 'x': startX, 'y': startY };
      
    var canvas = document.createElement('canvas');
    $(canvas).attr({width:w,height:h});

    var ctx = canvas.getContext('2d');
    ctx.fillStyle = 'rgb(255, 255, 255)';
    ctx.fillRect(0, 0, w, h);
    ctx.fillStyle = 'rgb(0, 0, 0)';
    var count = rects.length;
    var a;
    for(a = 0; a < count; a++) {
      r = rects[a];
      ctx.fillRect(r.x, r.y, r.w, r.h);
    }
    
    var divWidth = parseInt($div.css('width')) + bufferX;
    var divHeight = parseInt($div.css('height')) + bufferY;
    var strideX = divWidth / 4;
    var strideY = divHeight / 4;
    var data = ctx.getImageData(0, 0, w, h).data;

    function isEmpty(x1, y1) {
      return (x1 >= 0 && y1 >= 0
          && x1 < w && y1 < h
          && data[(y1 * w + x1) * 4]);
    }

    function isEmptyBox(x1, y1) {
      return (isEmpty(x1, y1) 
          && isEmpty(x1 + (divWidth - 1), y1)
          && isEmpty(x1, y1 + (divHeight - 1))
          && isEmpty(x1 + (divWidth - 1), y1 + (divHeight - 1)));
    }
    
    for(var y = startY; y < h; y += strideY) {
      for(var x = startX; x < w; x += strideX) {
        if(isEmptyBox(x, y)) {
          for(; y > startY + 1; y--) {
            if(!isEmptyBox(x, y - 1))
              break;
          }

          for(; x > startX + 1; x--) {
            if(!isEmptyBox(x - 1, y))
              break;
          }

          return { 'x': x, 'y': y };
        }
  	  }
    }

    return { 'x': startX, 'y': h };        
  }
}


//----------------------------------------------------------
function ArrangeClass(name, func){ this.init(name, func); };
ArrangeClass.prototype = {
  init: function(name, func){
    this.$el = this._create(name);
    this.arrange = func;
    if(func) this.$el.click(func);
  },
  
  _create: function(name){
    return $("<a class='action' href='#'/>").text(name).appendTo("#actions");
  }
}


//----------------------------------------------------------
var grid = new ArrangeClass("Grid", function(value) {
  var immediately = false;
  if(typeof(value) == 'boolean')
    immediately = value;

  var startX = 30;         
  var x = startX;
  var y = 100;
  $(".tab:visible").each(function(i){
    $el = $(this);
    
    if(immediately)
      $el.css({top: y,left: x});
    else {
      TabMirror.pausePainting();
      $el.animate({top: y,left: x}, 500, null, function() {
        TabMirror.resumePainting();
      });
    }
    
    x += $el.width() + 30;
    if( x > window.innerWidth - ($el.width() + startX)){ // includes allowance for the box shadow
      x = startX;
      y += $el.height() + 30;
    }
  });
});
    
//----------------------------------------------------------
var site = new ArrangeClass("Site", function() {
  var startX = 30;
  var startY = 100;
  var x = startX;
  var y = startY;
  var x2; 
  var y2;
  var groups = [];
  $(".tab:visible").each(function(i) {
    $el = $(this);
    var tab = Tabs.tab(this);
    
    var group = $el.data('group');
    if(group)
      group.remove(this);
      
    var url = tab.url; 
    var domain = url.split('/')[2]; 
    var domainParts = domain.split('.');
    var mainDomain = domainParts[domainParts.length - 2];
    if(groups[mainDomain]) 
      groups[mainDomain].push(this);
    else 
      groups[mainDomain] = [this];
  });
  
  var leftovers = [];
  for(key in groups) {
    var set = groups[key];
    if(set.length > 1) {
      group = new Groups.Group();
      group.create(set);            
    } else
      leftovers.push(set[0]);
  }
  
  if(leftovers.length > 1) {
    group = new Groups.Group();
    group.create(leftovers);            
  }
  
  Groups.arrange();
});

//----------------------------------------------------------
var Arrange = {
  initialized: false,

  init: function(){
    this.initialized = true;
    grid.arrange(true);
  }
}

//----------------------------------------------------------
function UIClass(){ this.init(); };
UIClass.prototype = {
  navbar: Navbar,
  tabbar: Tabbar,
  init: function(){
    Page.init();
    Arrange.init();
  }
}

//----------------------------------------------------------
var UI = new UIClass();
window.UI = UI;

})();