function WidgetFactory(serverUrl, database) {
  this.nextUploadId = 0;
  this.serverUrl = serverUrl;
  this.database = database;
  if (window['swfobject']) {
    this.createSWF = window['swfobject']['createSWF'];
  } else {
    this.createSWF = function(){
      alert("ERROR: swfobject not loaded!");
    };
  }
};

WidgetFactory.prototype = {
  createController: function(input, scope) {
    var controller;
    var type = input.attr('type').toLowerCase();
    var exp = input.attr('name');
    if (exp) exp = exp.split(':').pop();
    var event = "change";
    var bubbleEvent = true;
    var formatter = angularFormatter[input.attr('ng-format')] || angularFormatter['noop'];
    if (type == 'button' || type == 'submit' || type == 'reset' || type == 'image') {
      controller = new ButtonController(input[0], exp, formatter);
      event = "click";
      bubbleEvent = false;
    } else if (type == 'text' || type == 'textarea' || type == 'hidden' || type == 'password') {
      controller = new TextController(input[0], exp, formatter);
      event = "keyup change";
    } else if (type == 'checkbox') {
      controller = new CheckboxController(input[0], exp, formatter);
      event = "click";
    } else if (type == 'radio') {
      controller = new RadioController(input[0], exp, formatter);
      event="click";
    } else if (type == 'select-one') {
      controller = new SelectController(input[0], exp, formatter);
    } else if (type == 'select-multiple') {
      controller = new MultiSelectController(input[0], exp, formatter);
    } else if (type == 'file') {
      controller = this.createFileController(input, exp, formatter);
    } else {
      throw 'Unknown type: ' + type;
    }
    input.data('controller', controller);
    var updateView = scope.get('$updateView');
    var action = function() {
      if (controller.updateModel(scope)) {
        var action = jQuery(controller.view).attr('ng-action') || "";
        if (scope.evalWidget(controller, action)) {
          updateView(scope);
        }
      }
      return bubbleEvent;
    };
    jQuery(controller.view, ":input").
      bind(event, action);
    return controller;
  },
  
  createFileController: function(fileInput) {
    var uploadId = '__uploadWidget_' + (this.nextUploadId++);
    var view = FileController.template(uploadId);
    fileInput.after(view);
    var att = {
        'data':this.serverUrl + "/admin/ServerAPI.swf",
        'width':"95", 'height':"20", 'align':"top",
        'wmode':"transparent"};
    var par = {
        'flashvars':"uploadWidgetId=" + uploadId,
        'allowScriptAccess':"always"};
    var swfNode = this.createSWF(att, par, uploadId);
    fileInput.remove();
    var cntl = new FileController(view, fileInput[0].name, swfNode, this.serverUrl + "/data/" + this.database);
    jQuery(swfNode).data('controller', cntl);
    return cntl;
  }
};
/////////////////////
// FileController
///////////////////////

function FileController(view, scopeName, uploader, databaseUrl) {
  this.view = view;
  this.uploader = uploader;
  this.scopeName = scopeName;
  this.attachmentsPath = databaseUrl + '/_attachments';
  this.value = null;
  this.lastValue = undefined;
};

angularCallbacks['flashEvent'] = function(id, event, args) {
  var object = document.getElementById(id);
  var jobject = jQuery(object);
  var controller = jobject.data("controller");
  FileController.prototype[event].apply(controller, args);
  _.defer(jobject.scope().get('$updateView'));
};

FileController.template = function(id) {
  return jQuery('<span class="ng-upload-widget">' +
      '<input type="checkbox" ng-non-bindable="true"/>' +
      '<object id="' + id + '" />' +
      '<a></a>' +
      '<span/>' +
    '</span>'); 
};

extend(FileController.prototype, {
  'cancel': noop,
  'complete': noop,
  'httpStatus': function(status) {
    alert("httpStatus:" + this.scopeName + " status:" + status);
  },
  'ioError': function() {
    alert("ioError:" + this.scopeName);
  },
  'open': function() {
    alert("open:" + this.scopeName);
  },
  'progress':noop,
  'securityError':  function() {
    alert("securityError:" + this.scopeName);
  },
  'uploadCompleteData': function(data) {
    var value = fromJson(data);
    value.url = this.attachmentsPath + '/' + value.id + '/' + value.text;
    this.view.find("input").attr('checked', true);
    var scope = this.view.scope();
    this.value = value;
    this.updateModel(scope);
    this.value = null;
  },  
  'select': function(name, size, type) {
    this.name = name;
    this.view.find("a").text(name).attr('href', name);
    this.view.find("span").text(angular['filter']['bytes'](size));
    this.upload();
  },
  
  updateModel: function(scope) {
    var isChecked = this.view.find("input").attr('checked');
    var value = isChecked ? this.value : null;
    if (this.lastValue === value) {
      return false;
    } else {
      scope.set(this.scopeName, value);
      return true;
    }
  },
  
  updateView: function(scope) {
    var modelValue = scope.get(this.scopeName);
    if (modelValue && this.value !== modelValue) {
      this.value = modelValue;
      this.view.find("a").
        attr("href", this.value.url).
        text(this.value.text);
      this.view.find("span").text(angular['filter']['bytes'](this.value.size));
    }
    this.view.find("input").attr('checked', !!modelValue);
  },
  
  upload: function() {
    if (this.name) {
      this.uploader['uploadFile'](this.attachmentsPath);
    }
  }
});

///////////////////////
// NullController
///////////////////////
function NullController(view) {this.view = view;};
NullController.prototype = {
  updateModel: function() { return true; },
  updateView: noop
};
NullController.instance = new NullController();


///////////////////////
// ButtonController
///////////////////////
var ButtonController = NullController;

///////////////////////
// TextController
///////////////////////
function TextController(view, exp, formatter) {
  this.view = view;
  this.formatter = formatter;
  this.exp = exp;
  this.validator = view.getAttribute('ng-validate');
  this.required = typeof view.attributes['ng-required'] != "undefined";
  this.lastErrorText = null;
  this.lastValue = undefined;
  this.initialValue = this.formatter['parse'](view.value);
  var widget = view.getAttribute('ng-widget');
  if (widget === 'datepicker') {
    jQuery(view).datepicker();
  }
};

TextController.prototype = {
  updateModel: function(scope) {
    var value = this.formatter['parse'](this.view.value);
    if (this.lastValue === value) {
      return false;
    } else {
      scope.setEval(this.exp, value);
      this.lastValue = value;
      return true;
    }
  },
  
  updateView: function(scope) {
    var view = this.view;
    var value = scope.get(this.exp);
    if (typeof value === "undefined") {
      value = this.initialValue;
      scope.setEval(this.exp, value);
    }
    value = value ? value : '';
    if (!_(this.lastValue).isEqual(value)) {
      view.value = this.formatter['format'](value);
      this.lastValue = value;
    }
    
    var isValidationError = false;
    view.removeAttribute('ng-error');
    if (this.required) {
      isValidationError = !(value && $.trim(value).length > 0);
    }
    var errorText = isValidationError ? "Required Value" : null;
    if (!isValidationError && this.validator && value) {
      errorText = scope.validate(this.validator, value);
      isValidationError = !!errorText;
    }
    if (this.lastErrorText !== errorText) {
      this.lastErrorText = isValidationError;
      if (errorText !== null) {
        view.setAttribute('ng-error', errorText);
        scope.markInvalid(this);
      }
      jQuery(view).toggleClass('ng-validation-error', isValidationError);
    }
  }
};

///////////////////////
// CheckboxController
///////////////////////
function CheckboxController(view, exp, formatter) {
  this.view = view;
  this.exp = exp;
  this.lastValue = undefined;
  this.formatter = formatter;
  this.initialValue = this.formatter['parse'](view.checked ? view.value : "");
};

CheckboxController.prototype = {
  updateModel: function(scope) {
    var input = this.view;
    var value = input.checked ? input.value : '';
    value = this.formatter['parse'](value);
    value = this.formatter['format'](value);
    if (this.lastValue === value) {
      return false;
    } else {
      scope.setEval(this.exp, this.formatter['parse'](value));
      this.lastValue = value;
      return true;
    }
  },
  
  updateView: function(scope) {
    var input = this.view;
    var value = scope.eval(this.exp);
    if (typeof value === "undefined") {
      value = this.initialValue;
      scope.setEval(this.exp, value);
    }
    input.checked = this.formatter['parse'](input.value) == value;
  }
};

///////////////////////
// SelectController
///////////////////////
function SelectController(view, exp) {
  this.view = view;
  this.exp = exp;
  this.lastValue = undefined;
  this.initialValue = view.value;
};

SelectController.prototype = {
  updateModel: function(scope) {
    var input = this.view;
    if (input.selectedIndex < 0) {
      scope.setEval(this.exp, null);
    } else {
      var value = this.view.value;
      if (this.lastValue === value) {
        return false;
      } else {
        scope.setEval(this.exp, value);
        this.lastValue = value;
        return true;
      }
    }
  },
  
  updateView: function(scope) {
    var input = this.view;
    var value = scope.get(this.exp);
    if (typeof value === 'undefined') {
      value = this.initialValue;
      scope.setEval(this.exp, value);
    }
    if (value !== this.lastValue) {
      input.value = value ? value : "";
      this.lastValue = value;
    }
  }
};

///////////////////////
// MultiSelectController
///////////////////////
function MultiSelectController(view, exp) {
  this.view = view;
  this.exp = exp;
  this.lastValue = undefined;
  this.initialValue = this.selected();
};

MultiSelectController.prototype = {
  selected: function () {
    var value = [];
    var options = this.view.options;
    for ( var i = 0; i < options.length; i++) {
      var option = options[i];
      if (option.selected) {
        value.push(option.value);
      }
    }
    return value;
  },
  
  updateModel: function(scope) {
    var value = this.selected();
    // TODO: This is wrong! no caching going on here as we are always comparing arrays
    if (this.lastValue === value) {
      return false;
    } else {
      scope.setEval(this.exp, value);
      this.lastValue = value;
      return true;
    }
  },
  
  updateView: function(scope) {
    var input = this.view;
    var selected = scope.get(this.exp);
    if (typeof selected === "undefined") {
      selected = this.initialValue;
      scope.setEval(this.exp, selected);
    }
    if (selected !== this.lastValue) {
      var options = input.options;
      for ( var i = 0; i < options.length; i++) {
        var option = options[i];
        option.selected = _.include(selected, option.value);
      }
      this.lastValue = selected;
    }
  }
};

///////////////////////
// RadioController
///////////////////////
function RadioController(view, exp) {
  this.view = view;
  this.exp = exp;
  this.lastChecked = undefined;
  this.lastValue = undefined;
  this.inputValue = view.value;
  this.initialValue = view.checked ? view.value : null;
};

RadioController.prototype = {
  updateModel: function(scope) {
    var input = this.view;
    if (this.lastChecked) {
      return false;
    } else {
      input.checked = true;
      this.lastValue = scope.setEval(this.exp, this.inputValue);
      this.lastChecked = true;
      return true;
    }
  },
  
  updateView: function(scope) {
    var input = this.view;
    var value = scope.get(this.exp);
    if (this.initialValue && typeof value === "undefined") {
      value = this.initialValue;
      scope.setEval(this.exp, value);
    }
    if (this.lastValue != value) {
      this.lastChecked = input.checked = this.inputValue == (''+value);
      this.lastValue = value;
    }
  }
};

///////////////////////
//ElementController
///////////////////////
function BindUpdater(view, exp) {
  this.view = view;
  this.exp = Binder.parseBindings(exp);
  this.hasError = false;
  this.scopeSelf = {element:view};
};

BindUpdater.toText = function(obj) {
  var e = escapeHtml;
  switch(typeof obj) {
    case "string":
    case "boolean":
    case "number":
      return e(obj);
    case "function":
      return BindUpdater.toText(obj());
    case "object":
      if (isNode(obj)) {
        return outerHTML(obj);
      } else if (obj instanceof angular.filter.Meta) {
        switch(typeof obj.html) {
          case "string":
          case "number":
            return obj.html;
          case "function":
            return obj.html();
          case "object":
            if (isNode(obj.html))
              return outerHTML(obj.html);
          default:
            break;
        }
        switch(typeof obj.text) {
          case "string":
          case "number":
            return e(obj.text);
          case "function":
            return e(obj.text());
          default:
            break;
        }
      }
      if (obj === null)
        return "";
      return e(toJson(obj, true));
    default:
      return "";
  }
};

BindUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    var html = [];
    var parts = this.exp;
    var length = parts.length;
    for(var i=0; i<length; i++) {
      var part = parts[i];
      var binding = Binder.binding(part);
      if (binding) {
        scope.evalWidget(this, binding, this.scopeSelf, function(value){
          html.push(BindUpdater.toText(value));
        }, function(e, text){
          setHtml(this.view, text);
        });
        if (this.hasError) {
          return;
        }
      } else {
        html.push(escapeHtml(part));
      }
    }
    setHtml(this.view, html.join(''));
  }
};

function BindAttrUpdater(view, attrs) {
  this.view = view;
  this.attrs = attrs;
};

BindAttrUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    var jNode = jQuery(this.view);
    var attributeTemplates = this.attrs;
    if (this.hasError) {
      this.hasError = false;
      jNode.
        removeClass('ng-exception').
        removeAttr('ng-error');
    }
    var isImage = jNode.is('img');
    for (var attrName in attributeTemplates) {
      var attributeTemplate = Binder.parseBindings(attributeTemplates[attrName]);
      var attrValues = [];
      for ( var i = 0; i < attributeTemplate.length; i++) {
        var binding = Binder.binding(attributeTemplate[i]);
        if (binding) {
          try {
            var value = scope.eval(binding, {element:jNode[0], attrName:attrName});
            if (value && (value.constructor !== array || value.length !== 0))
              attrValues.push(value);
          } catch (e) {
            this.hasError = true;
            error('BindAttrUpdater', e);
            var jsonError = toJson(e, true);
            attrValues.push('[' + jsonError + ']');
            jNode.
              addClass('ng-exception').
              attr('ng-error', jsonError);
          }
        } else {
          attrValues.push(attributeTemplate[i]);
        }
      }
      var attrValue = attrValues.length ? attrValues.join('') : null;
      if(isImage && attrName == 'src' && !attrValue)
        attrValue = scope.get('$config.blankImage');
      jNode.attr(attrName, attrValue);
    } 
  }
};

function EvalUpdater(view, exp) {
  this.view = view;
  this.exp = exp;
  this.hasError = false;
};
EvalUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    scope.evalWidget(this, this.exp);
  }
};

function HideUpdater(view, exp) { this.view = view; this.exp = exp; };
HideUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    scope.evalWidget(this, this.exp, {}, function(hideValue){
      var view = jQuery(this.view);
      if (toBoolean(hideValue)) {
        view.hide();
      } else {
        view.show();
      }
    });
  }
};

function ShowUpdater(view, exp) { this.view = view; this.exp = exp; };
ShowUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    scope.evalWidget(this, this.exp, {}, function(hideValue){
      var view = jQuery(this.view);
      if (toBoolean(hideValue)) {
        view.show();
      } else {
        view.hide();
      }
    });
  }
};

function ClassUpdater(view, exp) { this.view = view; this.exp = exp; };
ClassUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    scope.evalWidget(this, this.exp, {}, function(classValue){
      if (classValue !== null && classValue !== undefined) {
        this.view.className = classValue;
      }
    });
  }
};

function ClassEvenUpdater(view, exp) { this.view = view; this.exp = exp; };
ClassEvenUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    scope.evalWidget(this, this.exp, {}, function(classValue){
      var index = scope.get('$index');
      jQuery(this.view).toggleClass(classValue, index % 2 === 1);
    });
  }
};

function ClassOddUpdater(view, exp) { this.view = view; this.exp = exp; };
ClassOddUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    scope.evalWidget(this, this.exp, {}, function(classValue){
      var index = scope.get('$index');
      jQuery(this.view).toggleClass(classValue, index % 2 === 0);
    });
  }
};

function StyleUpdater(view, exp) { this.view = view; this.exp = exp; };
StyleUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    scope.evalWidget(this, this.exp, {}, function(styleValue){
      jQuery(this.view).attr('style', "").css(styleValue);
    });
  }
};

///////////////////////
// RepeaterUpdater
///////////////////////
function RepeaterUpdater(view, repeaterExpression, template, prefix) {
  this.view = view;
  this.template = template;
  this.prefix = prefix;
  this.children = [];
  var match = repeaterExpression.match(/^\s*(.+)\s+in\s+(.*)\s*$/);
  if (! match) {
    throw "Expected ng-repeat in form of 'item in collection' but got '" +
      repeaterExpression + "'.";
  }
  var keyValue = match[1];
  this.iteratorExp = match[2];
  match = keyValue.match(/^([\$\w]+)|\(([\$\w]+)\s*,\s*([\$\w]+)\)$/);
  if (!match) {
    throw "'item' in 'item in collection' should be identifier or (key, value) but get '" +
      keyValue + "'.";
  }
  this.valueExp = match[3] || match[1];
  this.keyExp = match[2];
};

RepeaterUpdater.prototype = {
  updateModel: noop,
  updateView: function(scope) {
    scope.evalWidget(this, this.iteratorExp, {}, function(iterator){
      var self = this;
      if (!iterator) {
        iterator = [];
        if (scope.isProperty(this.iteratorExp)) {
          scope.set(this.iteratorExp, iterator);
        }
      }
      var iteratorLength = iterator.length;
      var childrenLength = this.children.length;
      var cursor = this.view;
      var time = 0;
      var child = null;
      var keyExp = this.keyExp;
      var valueExp = this.valueExp;
      var i = 0;
      foreach(iterator, function(value, key){
        if (i < childrenLength) {
          // reuse children
          child = self.children[i];
          child.scope.set(valueExp, value);
        } else {
          // grow children
          var name = self.prefix +
            valueExp + " in " + self.iteratorExp + "[" + i + "]";
          var childScope = new Scope(scope.state, name);
          childScope.set('$index', i);
          if (keyExp)
            childScope.set(keyExp, key);
          childScope.set(valueExp, value);
          child = { scope:childScope, element:self.template(childScope, self.prefix, i) };
          cursor.after(child.element);
          self.children.push(child);
        }
        cursor = child.element;
        var s = new Date().getTime();
        child.scope.updateView();
        time += new Date().getTime() - s;
        i++;
      });
      // shrink children
      for ( var r = childrenLength; r > iteratorLength; --r) {
        var unneeded = this.children.pop().element[0];
        unneeded.parentNode.removeChild(unneeded);
      }
      // Special case for option in select
      if (child && child.element[0].nodeName === "OPTION") {
        var select = jQuery(child.element[0].parentNode);
        var cntl = select.data('controller');
        if (cntl) {
          cntl.lastValue = undefined;
          cntl.updateView(scope);
        }
      }
    });
  }
};

//////////////////////////////////
// PopUp
//////////////////////////////////

function PopUp(doc) {
  this.doc = doc;
};

PopUp.OUT_EVENT = "mouseleave mouseout click dblclick keypress keyup";

PopUp.onOver = function(e) {
  PopUp.onOut();
  var jNode = jQuery(this);
  jNode.bind(PopUp.OUT_EVENT, PopUp.onOut);
  var position = jNode.position();
  var de = document.documentElement;
  var w = self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
  var hasArea = w - position.left;
  var width = 300;
  var title = jNode.hasClass("ng-exception") ? "EXCEPTION:" : "Validation error...";
  var msg = jNode.attr("ng-error");

  var x;
  var arrowPos = hasArea>(width+75) ? "left" : "right";
  var tip = jQuery(
    "<div id='ng-callout' style='width:"+width+"px'>" +
      "<div class='ng-arrow-"+arrowPos+"'/>" +
      "<div class='ng-title'>"+title+"</div>" +
      "<div class='ng-content'>"+msg+"</div>" +
    "</div>");
  jQuery("body").append(tip);
  if(arrowPos === 'left'){
    x = position.left + this.offsetWidth + 11;
  }else{
    x = position.left - (width + 15);
    tip.find('.ng-arrow-right').css({left:width+1});
  }

  tip.css({left: x+"px", top: (position.top - 3)+"px"});
  return true;
};

PopUp.onOut = function() {
  jQuery('#ng-callout').
    unbind(PopUp.OUT_EVENT, PopUp.onOut).
    remove();
  return true;
};

PopUp.prototype = {
  bind: function () {
    var self = this;
    this.doc.find('.ng-validation-error,.ng-exception').
      live("mouseover", PopUp.onOver);
  }
};

//////////////////////////////////
// Status
//////////////////////////////////


function Status(body) {
  this.loader = body.append(Status.DOM).find("#ng-loading");
  this.requestCount = 0;
};

Status.DOM ='<div id="ng-spacer"></div><div id="ng-loading">loading....</div>';

Status.prototype = {
  beginRequest: function () {
    if (this.requestCount === 0) {
      this.loader.show();
    }
    this.requestCount++;
  },
  
  endRequest: function () {
    this.requestCount--;
    if (this.requestCount === 0) {
      this.loader.hide("fold");
    }
  }
};