define(
    [
        "jquery", "underscore",
        "js/views/video/transcripts/utils", "js/views/video/transcripts/file_uploader",
        "xmodule", "jquery.form"
    ],
function ($, _, Utils, FileUploader) {
    'use strict';

    describe('Transcripts.FileUploader', function () {
        var videoListEntryTemplate = readFixtures(
                'video/transcripts/metadata-videolist-entry.underscore'
            ),
            fileUploadTemplate = readFixtures(
                'video/transcripts/file-upload.underscore'
            ),
            view;

        beforeEach(function () {
            setFixtures(
                $("<div>", {id: "metadata-videolist-entry"})
                    .html(videoListEntryTemplate)
            );
            appendSetFixtures(
                $("<script>",
                    {
                        id: "file-upload",
                        type: "text/template"
                    }
                ).text(fileUploadTemplate)
            );

            var messenger = jasmine.createSpyObj(
                    'MessageManager',
                    ['render', 'showError', 'hideError']
                ),
                videoListObject = jasmine.createSpyObj(
                    'MetadataView.VideoList',
                    ['render', 'getVideoObjectsList']
                ),
                $container = $('.transcripts-status');

            $container
                .append('<div class="transcripts-file-uploader" />')
                .append('<a class="setting-upload" href="#">Upload</a>');

            spyOn(FileUploader.prototype, 'render').and.callThrough();

            view = new FileUploader({
                el: $container,
                messenger: messenger,
                videoListObject: videoListObject,
                component_locator: 'component_locator'
            });
        });

        it('Initialize', function () {
            expect(view.file).toBe(false);
            expect(FileUploader.prototype.render).toHaveBeenCalled();
        });

        describe('Render', function () {

            beforeEach(function () {
                spyOn(_, 'template').and.callThrough();
            });

            it('Template doesn\'t exist', function () {
                spyOn(console, 'error');
                view.uploadTpl = '';

                expect(view.render).not.toThrow();
                expect(console.error).toHaveBeenCalled();
                expect(_.template).not.toHaveBeenCalled();
            });

            it('Container where template will be inserted doesn\'t exist',
                function () {
                    $('.transcripts-file-uploader').remove();

                    expect(view.render).not.toThrow();
                    expect(_.template).not.toHaveBeenCalled();
                }
            );

            it('All works okay if all data is okay', function () {
                var elList = ['$form', '$input', '$progress'],
                    validFileExtensions = ['srt', 'sjson'],
                    result = $.map(validFileExtensions, function(item, index) {
                                return '.' + item;
                            }).join(', ');

                view.validFileExtensions = validFileExtensions;
                expect(view.render).not.toThrow();
                expect(_.template).toHaveBeenCalled();
                $.each(elList, function(index, el) {
                    expect(view[el].length).not.toBe(0);
                });
                expect(view.$input.attr('accept')).toBe(result);

            });
        });

        describe('Upload', function () {
            it('File is not chosen', function () {
                spyOn($.fn, 'ajaxSubmit');
                view.upload();

                expect(view.$form.ajaxSubmit).not.toHaveBeenCalled();
            });

            it('File is chosen', function () {
                spyOn($.fn, 'ajaxSubmit');

                view.file = {};
                view.upload();

                expect(view.$form.ajaxSubmit).toHaveBeenCalled();
            });
        });

        it('clickHandler', function () {
            spyOn($.fn, 'trigger');

            $('.setting-upload').click();

            expect($('.setting-upload').trigger).toHaveBeenCalledWith('click');
            expect(view.$input).toHaveValue('');
        });

        describe('changeHadler', function () {
            beforeEach(function () {
                spyOn(view, 'upload');
            });

            it('Valid File Type - error should be hided', function () {
                spyOn(view, 'checkExtValidity').and.returnValue(true);

                view.$input.change();

                expect(view.checkExtValidity).toHaveBeenCalled();
                expect(view.upload).toHaveBeenCalled();
                expect(view.options.messenger.hideError).toHaveBeenCalled();
            });

            it('Invalid File Type - error should be shown', function () {
                spyOn(view, 'checkExtValidity').and.returnValue(false);

                view.$input.change();

                expect(view.checkExtValidity).toHaveBeenCalled();
                expect(view.upload).not.toHaveBeenCalled();
                expect(view.options.messenger.showError).toHaveBeenCalled();
            });
        });

        describe('checkExtValidity', function () {
            var data = {
                    Correct: {
                        name: 'file_name.srt',
                        isValid: true
                    },
                    Incorrect: {
                        name: 'file_name.mp4',
                        isValid: false
                    }
                };

            $.each(data, function(fileType, fileInfo) {
                it(fileType + ' file type', function () {
                    var result = view.checkExtValidity(fileInfo);

                    expect(result).toBe(fileInfo.isValid);
                });
            });
        });

        it('xhrResetProgressBar', function () {
            view.xhrResetProgressBar();
            expect(view.$progress.width()).toBe(0);
            expect(view.$progress.html()).toBe('0%');
            expect(view.$progress).not.toHaveClass('is-invisible');
        });

        it('xhrProgressHandler', function () {
            var percent = 26;

            spyOn($.fn, 'width').and.callThrough();

            view.xhrProgressHandler(null, null, null, percent);
            expect(view.$progress.width).toHaveBeenCalledWith(percent + '%');
            expect(view.$progress.html()).toBe(percent + '%');
        });

        describe('xhrCompleteHandler', function () {
            it('Ajax Success', function () {
                var xhr = {
                    status: 200,
                    responseText: JSON.stringify({
                        status: 'Success',
                        subs: 'test'
                    })
                };
                spyOn(Utils.Storage, 'set');
                view.xhrCompleteHandler(xhr);

                expect(view.$progress).toHaveClass('is-invisible');
                expect(view.options.messenger.render.calls.mostRecent().args[0])
                    .toEqual('uploaded');
                expect(Utils.Storage.set)
                    .toHaveBeenCalledWith('sub', 'test');
            });

            var assertAjaxError = function (xhr) {
                spyOn(Utils.Storage, 'set');
                view.xhrCompleteHandler(xhr);

                expect(view.options.messenger.showError).toHaveBeenCalled();
                expect(view.$progress).toHaveClass('is-invisible');
                expect(view.options.messenger.render)
                    .not
                    .toHaveBeenCalled();
                expect(Utils.Storage.set)
                    .not
                    .toHaveBeenCalledWith('sub', 'test');
            };

            it('Ajax transport Error', function () {
                var xhr = {
                    status: 400,
                    responseText: JSON.stringify({})
                };

                assertAjaxError(xhr);
            });
        });
    });
});
