$(document).ready(function() {

    module("ajax", {

        setup: function() {

          this.scriptsLength = $('head script[src]').length-1;

          this.cssLength = $('head link[rel=stylesheet]').length-1;

          // re-initialize cw loaded cache so that each tests run in a

          // clean environment, have a lookt at _loadAjaxHtmlHead implementation

          // in cubicweb.ajax.js for more information.

          cw.loaded_scripts = [];

          cw.loaded_links = [];

        },

        teardown: function() {

          $('head link[rel=stylesheet]:gt(' + this.cssLength + ')').remove();

        }

      });

    function jsSources() {

        return $.map($('head script[src]'), function(script) {

            return script.getAttribute('src');

        });

    }

    test('test simple h1 inclusion (ajax_url0.html)', function() {

        expect(3);

        equals(jQuery('#main').children().length, 0);

        stop();

        jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url0.html')

        .addCallback(function() {

                try {

                    equals(jQuery('#main').children().length, 1);

                    equals(jQuery('#main h1').html(), 'Hello');

                } finally {

                    start();

                };

            }

        );

    });

    test('test simple html head inclusion (ajax_url1.html)', function() {

        expect(6);

        var scriptsIncluded = jsSources();

        equals(jQuery.inArray('http://foo.js', scriptsIncluded), - 1);

        stop();

        jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url1.html')

        .addCallback(function() {

                try {

                    var origLength = scriptsIncluded.length;

                    scriptsIncluded = jsSources();

                    equals(scriptsIncluded.length, origLength + 1);

                    // check that <div class="ajaxHtmlHead"> has been removed

                    equals(jQuery('#main').children().length, 1);

                    equals(jQuery('div.ajaxHtmlHead').length, 0);

                    equals(jQuery('#main h1').html(), 'Hello');

                } finally {

                    start();

                };

            }

        );

    });

    test('test addCallback', function() {

        expect(3);

        equals(jQuery('#main').children().length, 0);

        stop();

        var d = jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url0.html');

        d.addCallback(function() {

            try {

                equals(jQuery('#main').children().length, 1);

                equals(jQuery('#main h1').html(), 'Hello');

            } finally {

                start();

            };

        });

    });

    test('test callback after synchronous request', function() {

        expect(1);

        var deferred = new Deferred();

        var result = jQuery.ajax({

            url: BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url0.html',

            async: false,

            beforeSend: function(xhr) {

                deferred._req = xhr;

            },

            success: function(data, status) {

                deferred.success(data);

            }

        });

        stop();

        deferred.addCallback(function() {

            try {

                // add an assertion to ensure the callback is executed

                ok(true, "callback is executed");

            } finally {

                start();

            };

        });

    });

    test('test addCallback with parameters', function() {

        expect(3);

        equals(jQuery('#main').children().length, 0);

        stop();

        var d = jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url0.html');

        d.addCallback(function(data, req, arg1, arg2) {

            try {

                equals(arg1, 'Hello');

                equals(arg2, 'world');

            } finally {

                start();

            };

        },

        'Hello', 'world');

    });

    test('test callback after synchronous request with parameters', function() {

        var deferred = new Deferred();

        deferred.addCallback(function(data, req, arg1, arg2) {

            // add an assertion to ensure the callback is executed

            try {

                ok(true, "callback is executed");

                equals(arg1, 'Hello');

                equals(arg2, 'world');

            } finally {

                start();

            };

        },

        'Hello', 'world');

        deferred.addErrback(function() {

            // throw an exception to start errback chain

            try {

                throw this._error;

            } finally {

                start();

            };

        });

        stop();

        var result = jQuery.ajax({

            url: BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url0.html',

            async: false,

            beforeSend: function(xhr) {

                deferred._req = xhr;

            },

            success: function(data, status) {

                deferred.success(data);

            }

        });

    });

  test('test addErrback', function() {

        expect(1);

        stop();

        var d = jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/nonexistent.html');

        d.addCallback(function() {

            // should not be executed

            ok(false, "callback is executed");

        });

        d.addErrback(function() {

            try {

                ok(true, "errback is executed");

            } finally {

                start();

            };

        });

    });

    test('test callback execution order', function() {

        expect(3);

        var counter = 0;

        stop();

        var d = jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url0.html');

        d.addCallback(function() {

                try {

                    equals(++counter, 1); // should be executed first

                } finally {

                    start();

                };

            }

        );

        d.addCallback(function() {

            equals(++counter, 2);

        });

        d.addCallback(function() {

            equals(++counter, 3);

        });

    });

    test('test already included resources are ignored (ajax_url1.html)', function() {

        expect(10);

        var scriptsIncluded = jsSources();

        // NOTE:

        equals(jQuery.inArray('http://foo.js', scriptsIncluded), -1);

        equals(jQuery('head link').length, 1);

        /* use endswith because in pytest context we have an absolute path */

        ok(jQuery('head link').attr('href').endswith('/qunit.css'));

        stop();

        jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url1.html')

        .addCallback(function() {

                var origLength = scriptsIncluded.length;

                scriptsIncluded = jsSources();

                try {

                    // check that foo.js has been inserted in <head>

                    equals(scriptsIncluded.length, origLength + 1);

                    // check that <div class="ajaxHtmlHead"> has been removed

                    equals(jQuery('#main').children().length, 1);

                    equals(jQuery('div.ajaxHtmlHead').length, 0);

                    equals(jQuery('#main h1').html(), 'Hello');

                    // qunit.css is not added twice

                    equals(jQuery('head link').length, 1);

                    /* use endswith because in pytest context we have an absolute path */

                    ok(jQuery('head link').attr('href').endswith('/qunit.css'));

                } finally {

                    start();

                }

            }

        );

    });

    test('test synchronous request loadRemote', function() {

        var res = loadRemote(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajaxresult.json', {},

        'GET', true);

        same(res, ['foo', 'bar']);

    });

    test('test event on CubicWeb', function() {

        expect(1);

        stop();

        var events = null;

        jQuery(CubicWeb).bind('server-response', function() {

            // check that server-response event on CubicWeb is triggered

            events = 'CubicWeb';

        });

        jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url0.html')

        .addCallback(function() {

                try {

                    equals(events, 'CubicWeb');

                } finally {

                    start();

                };

            }

        );

    });

    test('test event on node', function() {

        expect(3);

        stop();

        var nodes = [];

        jQuery('#main').bind('server-response', function() {

            nodes.push('node');

        });

        jQuery(CubicWeb).bind('server-response', function() {

            nodes.push('CubicWeb');

        });

        jQuery('#main').loadxhtml(BASE_URL + 'cwsoftwareroot/web/test/jstests/ajax_url0.html')

        .addCallback(function() {

                try {

                    equals(nodes.length, 2);

                    // check that server-response event on CubicWeb is triggered

                    // only once and event server-response on node is triggered

                    equals(nodes[0], 'CubicWeb');

                    equals(nodes[1], 'node');

                } finally {

                    start();

                };

            }

        );

    });

});