if (typeof document.getAttribute == 'undefined')
  document.getAttribute = function() {};
if (typeof Node == 'undefined') {
  Node = {
    ELEMENT_NODE : 1,
    ATTRIBUTE_NODE : 2,
    TEXT_NODE : 3,
    CDATA_SECTION_NODE : 4,
    ENTITY_REFERENCE_NODE : 5,
    ENTITY_NODE : 6,
    PROCESSING_INSTRUCTION_NODE : 7,
    COMMENT_NODE : 8,
    DOCUMENT_NODE : 9,
    DOCUMENT_TYPE_NODE : 10,
    DOCUMENT_FRAGMENT_NODE : 11,
    NOTATION_NODE : 12
  };
}

function noop() {}
if (!window['console']) window['console']={'log':noop, 'error':noop};

var consoleNode,
    foreach          = _.each,
    extend           = _.extend,
    jQuery           = window['jQuery'],
    msie             = jQuery['browser']['msie'],
    angular          = window['angular']    || (window['angular']    = {}), 
    angularValidator = angular['validator'] || (angular['validator'] = {}), 
    angularFilter    = angular['filter']    || (angular['filter']    = {}), 
    angularCallbacks = angular['callbacks'] || (angular['callbacks'] = {}),
    angularAlert     = angular['alert']     || (angular['alert']     = function(){
        log(arguments); window.alert.apply(window, arguments); 
      });

function log(a, b, c){
  var console = window['console'];
  switch(arguments.length) {
  case 1:
    console['log'](a);
    break;
  case 2:
    console['log'](a, b);
    break;
  default:
    console['log'](a, b, c);
    break;
  }
}

function error(a, b, c){
  var console = window['console'];
  switch(arguments.length) {
  case 1:
    console['error'](a);
    break;
  case 2:
    console['error'](a, b);
    break;
  default:
    console['error'](a, b, c);
    break;
  }
}

function consoleLog(level, objs) {
  var log = document.createElement("div");
  log.className = level;
  var msg = "";
  var sep = "";
  for ( var i = 0; i < objs.length; i++) {
    var obj = objs[i];
    msg += sep + (typeof obj == 'string' ? obj : toJson(obj));
    sep = " ";
  }
  log.appendChild(document.createTextNode(msg));
  consoleNode.appendChild(log);
}

function isNode(inp) {
  return inp &&
      inp.tagName &&
      inp.nodeName &&
      inp.ownerDocument &&
      inp.removeAttribute;
}

function isLeafNode (node) {
  switch (node.nodeName) {
  case "OPTION":
  case "PRE":
  case "TITLE":
    return true;
  default:
    return false;
  }
}

function setHtml(node, html) {
  if (isLeafNode(node)) {
    if (msie) {
      node.innerText = html;
    } else {
      node.textContent = html;
    }
  } else {
    node.innerHTML = html;
  }
}

function escapeHtml(html) {
  if (!html || !html.replace)
    return html;
  return html.
      replace(/&/g, '&amp;').
      replace(/</g, '&lt;').
      replace(/>/g, '&gt;');
}

function escapeAttr(html) {
  if (!html || !html.replace)
    return html;
  return html.replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/\"/g,
      '&quot;');
}

function bind(_this, _function) {
  if (!_this)
    throw "Missing this";
  if (!_.isFunction(_function))
    throw "Missing function";
  return function() {
    return _function.apply(_this, arguments);
  };
}

function shiftBind(_this, _function) {
  return function() {
    var args = [ this ];
    for ( var i = 0; i < arguments.length; i++) {
      args.push(arguments[i]);
    }
    return _function.apply(_this, args);
  };
}

function outerHTML(node) {
  var temp = document.createElement('div');
  temp.appendChild(node);
  var outerHTML = temp.innerHTML;
  temp.removeChild(node);
  return outerHTML;
}

function trim(str) {
  return str.replace(/^ */, '').replace(/ *$/, '');
}

function toBoolean(value) {
  var v = ("" + value).toLowerCase();
  if (v == 'f' || v == '0' || v == 'false' || v == 'no')
    value = false;
  return !!value;
}

function merge(src, dst) {
  for ( var key in src) {
    var value = dst[key];
    var type = typeof value;
    if (type == 'undefined') {
      dst[key] = fromJson(toJson(src[key]));
    } else if (type == 'object' && value.constructor != array &&
        key.substring(0, 1) != "$") {
      merge(src[key], value);
    }
  }
}

// ////////////////////////////
// Angular
// ////////////////////////////

function Angular(document, head, config) {
  this.document = jQuery(document);
  this.head = jQuery(head);
  this.config = config;
  this.location = window.location;
}

Angular.prototype = {
  load: function() {
    this.configureLogging();
    log("Server: " + this.config.server);
    this.configureJQueryPlugins();
    this.computeConfiguration();
    this.bindHtml();
  },
  
  configureJQueryPlugins: function() {
    log('Angular.configureJQueryPlugins()');
    jQuery['fn']['scope'] = function() {
      var element = this;
      while (element && element.get(0)) {
        var scope = element.data("scope");
        if (scope)
          return scope;
        element = element.parent();
      }
      return null;
    };
    jQuery['fn']['controller'] = function() {
      return this.data('controller') || NullController.instance;
    };
  },
  
  uid: function() {
    return "" + new Date().getTime();
  },
  
  computeConfiguration: function() {
    var config = this.config;
    if (!config.database) {
      var match = config.server.match(/https?:\/\/([\w]*)/);
      config.database = match ? match[1] : "$MEMORY";
    }
  },
  
  bindHtml: function() {
    log('Angular.bindHtml()');
    var watcher = this.watcher = new UrlWatcher(this.location);
    var document = this.document;
    var widgetFactory = new WidgetFactory(this.config.server, this.config.database);
    var binder = new Binder(document[0], widgetFactory, watcher, this.config);
    widgetFactory.onChangeListener = shiftBind(binder, binder.updateModel);
    var controlBar = new ControlBar(document.find('body'), this.config.server);
    var onUpdate = function(){binder.updateView();};
    var server = this.config.database=="$MEMORY" ?
        new FrameServer(this.window) :
        new Server(this.config.server, jQuery.getScript);
    server = new VisualServer(server, new Status(jQuery(document.body)), onUpdate);
    var users = new Users(server, controlBar);
    var databasePath = '/data/' + this.config.database;
    var post = function(request, callback){
      server.request("POST", databasePath, request, callback);
    };
    var datastore = new DataStore(post, users, binder.anchor);
    binder.updateListeners.push(function(){datastore.flush();});
    var scope = new Scope( {
      '$anchor' : binder.anchor,
      '$binder' : binder,
      '$config' : this.config,
      '$console' : window.console,
      '$datastore' : datastore,
      '$save' : function(callback) {
        datastore.saveScope(scope.state, callback, binder.anchor);
      },
      '$window' : window,
      '$uid' : this.uid,
      '$users' : users
    }, "ROOT");
  
    document.data('scope', scope);
    log('$binder.entity()');
    binder.entity(scope);
  
    log('$binder.compile()');
    binder.compile();
  
    log('ControlBar.bind()');
    controlBar.bind();
  
    log('$users.fetchCurrentUser()');
    function fetchCurrentUser() {
      users.fetchCurrentUser(function(u) {
        if (!u && document.find("[ng-auth=eager]").length) {
          users.login();
        }
      });
    }
    fetchCurrentUser();
  
    log('PopUp.bind()');
    new PopUp(document).bind();
  
    log('$binder.parseAnchor()');
    binder.parseAnchor();
    
    document.find("body").show();
    log('ready()');
  },
  
  visualPost: function(delegate) {
    var status = new Status(jQuery(document.body));
    return function(request, delegateCallback) {
      status.beginRequest(request);
      var callback = function() {
        status.endRequest();
        try {
          delegateCallback.apply(this, arguments);
        } catch (e) {
          alert(toJson(e));
        }
      };
      delegate(request, callback);
    };
  },
  
  configureLogging: function() {
    var url = window.location.href + '#';
    url = url.split('#')[1];
    var config = {
      debug : null
    };
    var configs = url.split('&');
    for ( var i = 0; i < configs.length; i++) {
      var part = (configs[i] + '=').split('=');
      config[part[0]] = part[1];
    }
    if (config.debug == 'console') {
      consoleNode = document.createElement("div");
      consoleNode.id = 'ng-console';
      document.getElementsByTagName('body')[0].appendChild(consoleNode);
      log = function() {
        consoleLog('ng-console-info', arguments);
      };
      console.error = function() {
        consoleLog('ng-console-error', arguments);
      };
    }
  }
};

function UrlWatcher(location) {
  this.location = location;
  this.delay = 25;
  this.setTimeout = function(fn, delay) {
    window.setTimeout(fn, delay);
  };
  this.listener = function(url) {
    return url;
  };
  this.expectedUrl = location.href;
}

UrlWatcher.prototype = {
  watch: function() {
    var self = this;
    var pull = function() {
      if (self.expectedUrl !== self.location.href) {
        var notify = self.location.hash.match(/^#\$iframe_notify=(.*)$/);
        if (notify) {
          if (!self.expectedUrl.match(/#/)) {
            self.expectedUrl += "#";
          }
          self.location.href = self.expectedUrl;
          var id = '_iframe_notify_' + notify[1];
          var notifyFn = angularCallbacks[id];
          delete angularCallbacks[id];
          try {
            (notifyFn||noop)();
          } catch (e) {
            alert(e);
          }
        } else {
          self.listener(self.location.href);
          self.expectedUrl = self.location.href;
        }
      }
      self.setTimeout(pull, self.delay);
    };
    pull();
  },
  
  setUrl: function(url) {
    //TODO: conditionaly?
    var existingURL = window.location.href;
    if (!existingURL.match(/#/))
      existingURL += '#';
    if (existingURL != url)
      window.location.href = url;
    this.existingURL = url;
  },
  
  getUrl: function() {
    return window.location.href;
  }
};
  
angular['compile'] = function(root, config) {
  config = config || {};
  var defaults = {
    'server': "",
    'addUrlChangeListener': noop
  };
  //todo: don't start watcher
  var angular = new Angular(root, jQuery("head"), _(defaults).extend(config));
  //todo: don't load stylesheet by default
  // loader.loadCss('/stylesheets/jquery-ui/smoothness/jquery-ui-1.7.1.css');
  // loader.loadCss('/stylesheets/css');
  angular.load();
  var scope = jQuery(root).scope();
  //TODO: cleanup
  return {
    'updateView':function(){return scope.updateView();},
    'set':function(){return scope.set.apply(scope, arguments);},
    'get':function(){return scope.get.apply(scope, arguments);},
    'init':function(){scope.get('$binder.executeInit')(); scope.updateView();},
    'watchUrl':function(){
      var binder = scope.get('$binder');
      var watcher = angular.watcher;
      watcher.listener = bind(binder, binder.onUrlChange, watcher);
      watcher.onUpdate = function(){alert("update");};
      watcher.watch();
    }
  };
};