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/*!
 * MockJax - jQuery Plugin to Mock Ajax requests
 *
 * Version:  1.5.0pre
 * Released:
 * Home:   http://github.com/appendto/jquery-mockjax
 * Author:   Jonathan Sharp (http://jdsharp.com)
 * License:  MIT,GPL
 *
 * Copyright (c) 2011 appendTo LLC.
 * Dual licensed under the MIT or GPL licenses.
 * http://appendto.com/open-source-licenses
 */
(function($) {
        var _ajax = $.ajax,
                mockHandlers = [],
                CALLBACK_REGEX = /=\?(&|$)/, 
                jsc = (new Date()).getTime();

        
        // Parse the given XML string. 
        function parseXML(xml) {
                if ( window['DOMParser'] == undefined && window.ActiveXObject ) {
                        DOMParser = function() { };
                        DOMParser.prototype.parseFromString = function( xmlString ) {
                                var doc = new ActiveXObject('Microsoft.XMLDOM');
                                doc.async = 'false';
                                doc.loadXML( xmlString );
                                return doc;
                        };
                }

                try {
                        var xmlDoc      = ( new DOMParser() ).parseFromString( xml, 'text/xml' );
                        if ( $.isXMLDoc( xmlDoc ) ) {
                                var err = $('parsererror', xmlDoc);
                                if ( err.length == 1 ) {
                                        throw('Error: ' + $(xmlDoc).text() );
                                }
                        } else {
                                throw('Unable to parse XML');
                        }
                } catch( e ) {
                        var msg = ( e.name == undefined ? e : e.name + ': ' + e.message );
                        $(document).trigger('xmlParseError', [ msg ]);
                        return undefined;
                }
                return xmlDoc;
        }

        // Trigger a jQuery event
        function trigger(s, type, args) {
                (s.context ? jQuery(s.context) : jQuery.event).trigger(type, args);
        }

        // Check if the data field on the mock handler and the request match. This 
        // can be used to restrict a mock handler to being used only when a certain
        // set of data is passed to it.
        function isMockDataEqual( mock, live ) {
                var identical = false;
                // Test for situations where the data is a querystring (not an object)
                if (typeof live === 'string') {
                        // Querystring may be a regex
                        return $.isFunction( mock.test ) ? mock.test(live) : mock == live;
                }
                $.each(mock, function(k, v) {
                        if ( live[k] === undefined ) {
                                identical = false;
                                return identical;
                        } else {
                                identical = true;
                                if ( typeof live[k] == 'object' ) {
                                        return isMockDataEqual(mock[k], live[k]);
                                } else {
                                        if ( $.isFunction( mock[k].test ) ) {
                                                identical = mock[k].test(live[k]);
                                        } else {
                                                identical = ( mock[k] == live[k] );
                                        }
                                        return identical;
                                }
                        }
                });

                return identical;
        }

        // Check the given handler should mock the given request
        function getMockForRequest( handler, requestSettings ) {
                // If the mock was registered with a function, let the function decide if we
                // want to mock this request
                if ( $.isFunction(handler) ) {
                        return handler( requestSettings );
                }

                // Inspect the URL of the request and check if the mock handler's url
                // matches the url for this ajax request
                if ( $.isFunction(handler.url.test) ) {
                        // The user provided a regex for the url, test it
                        if ( !handler.url.test( requestSettings.url ) ) {
                                return null;
                        }
                } else {
                        // Look for a simple wildcard '*' or a direct URL match
                        var star = handler.url.indexOf('*');
                        if (handler.url !== requestSettings.url && star === -1 || 
                                        !new RegExp(handler.url.replace(/[-[\]{}()+?.,\\^$|#\s]/g, "\\$&").replace('*', '.+')).test(requestSettings.url)) {
                                return null;
                        }
                }

                // Inspect the data submitted in the request (either POST body or GET query string)
                if ( handler.data && requestSettings.data ) {
                        if ( !isMockDataEqual(handler.data, requestSettings.data) ) {
                                // They're not identical, do not mock this request
                                return null;
                        }
                }
                // Inspect the request type
                if ( handler && handler.type && 
                                 handler.type.toLowerCase() != requestSettings.type.toLowerCase() ) {
                        // The request type doesn't match (GET vs. POST)
                        return null;
                }

                return handler;
        }

        // If logging is enabled, log the mock to the console
        function logMock( mockHandler, requestSettings ) {
                var c = $.extend({}, $.mockjaxSettings, mockHandler);
                if ( c.log && $.isFunction(c.log) ) {
                        c.log('MOCK ' + requestSettings.type.toUpperCase() + ': ' + requestSettings.url, $.extend({}, requestSettings));
                }
        }

        // Process the xhr objects send operation
        function _xhrSend(mockHandler, requestSettings, origSettings) {

                // This is a substitute for < 1.4 which lacks $.proxy
                var process = (function(that) {
                        return function() {
                                return (function() {
                                        // The request has returned
                                        this.status             = mockHandler.status;
                                        this.statusText         = mockHandler.statusText;
                                        this.readyState         = 4;

                                        // We have an executable function, call it to give
                                        // the mock handler a chance to update it's data
                                        if ( $.isFunction(mockHandler.response) ) {
                                                mockHandler.response(origSettings);
                                        }
                                        // Copy over our mock to our xhr object before passing control back to
                                        // jQuery's onreadystatechange callback
                                        if ( requestSettings.dataType == 'json' && ( typeof mockHandler.responseText == 'object' ) ) {
                                                this.responseText = JSON.stringify(mockHandler.responseText);
                                        } else if ( requestSettings.dataType == 'xml' ) {
                                                if ( typeof mockHandler.responseXML == 'string' ) {
                                                        this.responseXML = parseXML(mockHandler.responseXML);
                                                } else {
                                                        this.responseXML = mockHandler.responseXML;
                                                }
                                        } else {
                                                this.responseText = mockHandler.responseText;
                                        }
                                        if( typeof mockHandler.status == 'number' || typeof mockHandler.status == 'string' ) {
                                                this.status = mockHandler.status;
                                        }
                                        if( typeof mockHandler.statusText === "string") {
                                                this.statusText = mockHandler.statusText;
                                        }
                                        // jQuery < 1.4 doesn't have onreadystate change for xhr
                                        if ( $.isFunction(this.onreadystatechange) ) {
                                                if( mockHandler.isTimeout) {
                                                        this.status = -1;
                                                }
                                                this.onreadystatechange( mockHandler.isTimeout ? 'timeout' : undefined );
                                        } else if ( mockHandler.isTimeout ) {
                                                // Fix for 1.3.2 timeout to keep success from firing.
                                                this.status = -1;
                                        }
                                }).apply(that);
                        };
                })(this);

                if ( mockHandler.proxy ) {
                        // We're proxying this request and loading in an external file instead
                        _ajax({
                                global: false,
                                url: mockHandler.proxy,
                                type: mockHandler.proxyType,
                                data: mockHandler.data,
                                dataType: requestSettings.dataType === "script" ? "text/plain" : requestSettings.dataType,
                                complete: function(xhr, txt) {
                                        mockHandler.responseXML = xhr.responseXML;
                                        mockHandler.responseText = xhr.responseText;
                                        mockHandler.status = xhr.status;
                                        mockHandler.statusText = xhr.statusText;
                                        this.responseTimer = setTimeout(process, mockHandler.responseTime || 0);
                                }
                        });
                } else {
                        // type == 'POST' || 'GET' || 'DELETE'
                        if ( requestSettings.async === false ) {
                                // TODO: Blocking delay
                                process();
                        } else {
                                this.responseTimer = setTimeout(process, mockHandler.responseTime || 50);
                        }
                }
        }

        // Construct a mocked XHR Object
        function xhr(mockHandler, requestSettings, origSettings, origHandler) {
                // Extend with our default mockjax settings
                mockHandler = $.extend({}, $.mockjaxSettings, mockHandler);

                if (typeof mockHandler.headers === 'undefined') {
                        mockHandler.headers = {};
                }
                if ( mockHandler.contentType ) {
                        mockHandler.headers['content-type'] = mockHandler.contentType;
                }

                return {
                        status: mockHandler.status,
                        statusText: mockHandler.statusText,
                        readyState: 1,
                        open: function() { },
                        send: function() {
                                origHandler.fired = true;
                                _xhrSend.call(this, mockHandler, requestSettings, origSettings);
                        },
                        abort: function() {
                                clearTimeout(this.responseTimer);
                        },
                        setRequestHeader: function(header, value) {
                                mockHandler.headers[header] = value;
                        },
                        getResponseHeader: function(header) {
                                // 'Last-modified', 'Etag', 'content-type' are all checked by jQuery
                                if ( mockHandler.headers && mockHandler.headers[header] ) {
                                        // Return arbitrary headers
                                        return mockHandler.headers[header];
                                } else if ( header.toLowerCase() == 'last-modified' ) {
                                        return mockHandler.lastModified || (new Date()).toString();
                                } else if ( header.toLowerCase() == 'etag' ) {
                                        return mockHandler.etag || '';
                                } else if ( header.toLowerCase() == 'content-type' ) {
                                        return mockHandler.contentType || 'text/plain';
                                }
                        },
                        getAllResponseHeaders: function() {
                                var headers = '';
                                $.each(mockHandler.headers, function(k, v) {
                                        headers += k + ': ' + v + "\n";
                                });
                                return headers;
                        }
                };
        }

        // Process a JSONP mock request.
        function processJsonpMock( requestSettings, mockHandler, origSettings ) {
                // Handle JSONP Parameter Callbacks, we need to replicate some of the jQuery core here
                // because there isn't an easy hook for the cross domain script tag of jsonp

                processJsonpUrl( requestSettings );

                requestSettings.dataType = "json";
                if(requestSettings.data && CALLBACK_REGEX.test(requestSettings.data) || CALLBACK_REGEX.test(requestSettings.url)) {
                        createJsonpCallback(requestSettings, mockHandler);

                        // We need to make sure
                        // that a JSONP style response is executed properly

                        var rurl = /^(\w+:)?\/\/([^\/?#]+)/,
                                parts = rurl.exec( requestSettings.url ),
                                remote = parts && (parts[1] && parts[1] !== location.protocol || parts[2] !== location.host);

                        requestSettings.dataType = "script";
                        if(requestSettings.type.toUpperCase() === "GET" && remote ) {
                                var newMockReturn = processJsonpRequest( requestSettings, mockHandler, origSettings );

                                // Check if we are supposed to return a Deferred back to the mock call, or just 
                                // signal success
                                if(newMockReturn) {
                                        return newMockReturn;
                                } else {
                                        return true;
                                }
                        }
                }
                return null;
        }

        // Append the required callback parameter to the end of the request URL, for a JSONP request
        function processJsonpUrl( requestSettings ) {
                if ( requestSettings.type.toUpperCase() === "GET" ) {
                        if ( !CALLBACK_REGEX.test( requestSettings.url ) ) {
                                requestSettings.url += (/\?/.test( requestSettings.url ) ? "&" : "?") + 
                                        (requestSettings.jsonp || "callback") + "=?";
                        }
                } else if ( !requestSettings.data || !CALLBACK_REGEX.test(requestSettings.data) ) {
                        requestSettings.data = (requestSettings.data ? requestSettings.data + "&" : "") + (requestSettings.jsonp || "callback") + "=?";
                }
        }
        
        // Process a JSONP request by evaluating the mocked response text
        function processJsonpRequest( requestSettings, mockHandler, origSettings ) {
                // Synthesize the mock request for adding a script tag
                var callbackContext = origSettings && origSettings.context || requestSettings,
                        newMock = null;


                // If the response handler on the moock is a function, call it
                if ( mockHandler.response && $.isFunction(mockHandler.response) ) {
                        mockHandler.response(origSettings);
                } else {

                        // Evaluate the responseText javascript in a global context
                        if( typeof mockHandler.responseText === 'object' ) {
                                $.globalEval( '(' + JSON.stringify( mockHandler.responseText ) + ')');
                        } else {
                                $.globalEval( '(' + mockHandler.responseText + ')');
                        }
                }

                // Successful response
                jsonpSuccess( requestSettings, mockHandler );
                jsonpComplete( requestSettings, mockHandler );

                // If we are running under jQuery 1.5+, return a deferred object
                if(jQuery.Deferred){
                        newMock = new jQuery.Deferred();
                        if(typeof mockHandler.responseText == "object"){
                                newMock.resolve( mockHandler.responseText );
                        }
                        else{
                                newMock.resolve( jQuery.parseJSON( mockHandler.responseText ) );
                        }
                }
                return newMock;
        }


        // Create the required JSONP callback function for the request
        function createJsonpCallback( requestSettings, mockHandler ) {
                jsonp = requestSettings.jsonpCallback || ("jsonp" + jsc++);

                // Replace the =? sequence both in the query string and the data
                if ( requestSettings.data ) {
                        requestSettings.data = (requestSettings.data + "").replace(CALLBACK_REGEX, "=" + jsonp + "$1");
                }

                requestSettings.url = requestSettings.url.replace(CALLBACK_REGEX, "=" + jsonp + "$1");


                // Handle JSONP-style loading
                window[ jsonp ] = window[ jsonp ] || function( tmp ) {
                        data = tmp;
                        jsonpSuccess( requestSettings, mockHandler );
                        jsonpComplete( requestSettings, mockHandler );
                        // Garbage collect
                        window[ jsonp ] = undefined;

                        try {
                                delete window[ jsonp ];
                        } catch(e) {}

                        if ( head ) {
                                head.removeChild( script );
                        }
                };
        }

        // The JSONP request was successful
        function jsonpSuccess(requestSettings, mockHandler) {
                // If a local callback was specified, fire it and pass it the data
                if ( requestSettings.success ) {
                        requestSettings.success.call( callbackContext, ( mockHandler.response ? mockHandler.response.toString() : mockHandler.responseText || ''), status, {} );
                }

                // Fire the global callback
                if ( requestSettings.global ) {
                        trigger(requestSettings, "ajaxSuccess", [{}, requestSettings] );
                }
        }

        // The JSONP request was completed
        function jsonpComplete(requestSettings, mockHandler) {
                // Process result
                if ( requestSettings.complete ) {
                        requestSettings.complete.call( callbackContext, {} , status );
                }

                // The request was completed
                if ( requestSettings.global ) {
                        trigger( "ajaxComplete", [{}, requestSettings] );
                }

                // Handle the global AJAX counter
                if ( requestSettings.global && ! --jQuery.active ) {
                        jQuery.event.trigger( "ajaxStop" );
                }
        }


        // The core $.ajax replacement.  
        function handleAjax( url, origSettings ) {
                var mockRequest, requestSettings, mockHandler;

                // If url is an object, simulate pre-1.5 signature
                if ( typeof url === "object" ) {
                        origSettings = url;
                        url = undefined;
                } else {
                        // work around to support 1.5 signature
                        origSettings.url = url;
                }
                
                // Extend the original settings for the request
                requestSettings = jQuery.extend(true, {}, jQuery.ajaxSettings, origSettings);

                // Iterate over our mock handlers (in registration order) until we find
                // one that is willing to intercept the request
                for(var k = 0; k < mockHandlers.length; k++) {
                        if ( !mockHandlers[k] ) {
                                continue;
                        }
                        
                        mockHandler = getMockForRequest( mockHandlers[k], requestSettings );
                        if(!mockHandler) {
                                // No valid mock found for this request
                                continue;
                        }

                        // Handle console logging
                        logMock( mockHandler, requestSettings );


                        if ( requestSettings.dataType === "jsonp" ) {
                                if ((mockRequest = processJsonpMock( requestSettings, mockHandler, origSettings ))) {
                                        // This mock will handle the JSONP request
                                        return mockRequest;
                                }
                        }


                        // Removed to fix #54 - keep the mocking data object intact
                        //mockHandler.data = requestSettings.data;

                        mockHandler.cache = requestSettings.cache;
                        mockHandler.timeout = requestSettings.timeout;
                        mockHandler.global = requestSettings.global;

                        (function(mockHandler, requestSettings, origSettings, origHandler) {
                                mockRequest = _ajax.call($, $.extend(true, {}, origSettings, {
                                        // Mock the XHR object
                                        xhr: function() { return xhr( mockHandler, requestSettings, origSettings, origHandler ) }
                                }));
                        })(mockHandler, requestSettings, origSettings, mockHandlers[k]);

                        return mockRequest;
                }

                // We don't have a mock request, trigger a normal request
                return _ajax.apply($, [origSettings]);
        }


        // Public

        $.extend({
                ajax: handleAjax
        });

        $.mockjaxSettings = {
                //url:        null,
                //type:       'GET',
                log:          function(msg) {
                                                                                window['console'] && window.console.log && window.console.log(msg);
                                                                },
                status:       200,
                statusText:   "OK",
                responseTime: 500,
                isTimeout:    false,
                contentType:  'text/plain',
                response:     '',
                responseText: '',
                responseXML:  '',
                proxy:        '',
                proxyType:    'GET',

                lastModified: null,
                etag:         '',
                headers: {
                        etag: 'IJF@H#@923uf8023hFO@I#H#',
                        'content-type' : 'text/plain'
                }
        };

        $.mockjax = function(settings) {
                var i = mockHandlers.length;
                mockHandlers[i] = settings;
                return i;
        };
        $.mockjaxClear = function(i) {
                if ( arguments.length == 1 ) {
                        mockHandlers[i] = null;
                } else {
                        mockHandlers = [];
                }
        };
        $.mockjax.handler = function(i) {
          if ( arguments.length == 1 ) {
                        return mockHandlers[i];
                }
        };
})(jQuery);