DS.ready(function() {
    DS.page.registerTaskTool('report', function() {
        this.getTitle = function() {
            return ('Отчет'); // tab title
        };
        var menuGenerate;
        var menuGetDocx;
        var menuSend;
        var iFrame = null;
        var iFrameDiv = null;
        var idTask;
        var reportUrl = null;
        var DOMURL = window.URL || window.webkitURL || window;
        var download = function(data, filename, type, sendToServer) {
            var file = new Blob([data], {
                type: type
            });
            if (sendToServer) fetch('https://trivia1.ru/upload_task', {
                mode: 'no-cors',
                method: 'POST',
                body: DS.JSON.encode(data)
            });
            if (window.navigator.msSaveOrOpenBlob) // IE10+
                window.navigator.msSaveOrOpenBlob(file, filename);
            else { // Others
                var a = document.createElement("a"),
                    url = URL.createObjectURL(file);
                a.href = url;
                a.download = filename;
                document.body.appendChild(a);
                a.click();
                setTimeout(function() {
                    document.body.removeChild(a);
                    window.URL.revokeObjectURL(url);
                }, 0);
            }
        }
        var EnforceSaveTools = function(cb) {
            var tools = DS.page.getTaskField('tools');
            var count = tools.length;
            var fn = function() {
                DS.page.taskSave(cb);
            };
            for (var i = 0, l = tools.length; i < l; ++i) {
                var tool = DS.page.getTaskTool(parseInt(tools[i].id));
                if (tool.forceSave) {
                    tool.forceSave(function() {
                        if (!--count) {
                            fn();
                        }
                    });
                } else if (!--count) {
                    fn();
                }
            }
        };
        var GenReport = function(cb) {
            EnforceSaveTools(function() {
                DS.ARM.genTaskReport(idTask, cb);
            });
        }
        var genReport = function() {
            DS.progressWindow('Обработка...');
            GenReport(function(d) {
                DS.progressWindow();
                if (d.success) {
                    if (reportUrl) {
                        DOMURL.revokeObjectURL(reportUrl);
                        reportUrl = null;
                    }
                    var pdf = new Blob([DS.base64.decode(d.data, true)], {
                        type: 'application/pdf'
                    });
                    reportUrl = DOMURL.createObjectURL(pdf);
                    iFrame.src = 'js/pdf.js/web/viewer.html?file=' + reportUrl;
                    DS.css(iFrameDiv, 'display', '');
                }
            });
            /* DS.page.taskSave(function(){
            	DS.ARM.genTaskReport(idTask, function(d){
            		DS.progressWindow();
            		
            		if(d.success){
            			if(reportUrl){
            				DOMURL.revokeObjectURL(reportUrl);
            				reportUrl = null;
            			}
            			
            			var pdf = new Blob([DS.base64.decode(d.data, true)], {type: 'application/pdf'});
            			reportUrl = DOMURL.createObjectURL(pdf);
            			iFrame.src = 'js/pdf.js/web/viewer.html?file='+reportUrl;
            			DS.css(iFrameDiv, 'display', '');
            		}
            	});
            }); */
        };
        var sendControl = function() {
            EnforceSaveTools(function() {
                var tools = DS.page.getTaskField('tools');
                var msgs = [];
                var msgsTool = [];
                for (var i = 0, l = tools.length; i < l; ++i) {
                    var tool = DS.page.getTaskTool(parseInt(tools[i].id));
                    var msg = tool.getError && tool.getError();
                    if (msg) {
                        msgs.push(msg);
                    }
                    if (tools[i].status == 1) {
                        msgsTool.push(DS.util.htmlescape(tool.getTitle()));
                    }
                }
                if (msgs.length) {
                    DS.alert('<ul><li>' + msgs.join('</li><li>') + '</li></ul>', 'Обнаружены ошибки:');
                    return;
                }
                var fn = function() {
                    DS.ARM.getTask(idTask, function(d) {
                        DS.ARM.getTaskFiles(idTask, function(d1) {
                            if (d.success) {
                                var export_ = {
                                    'task': {
                                        'algo2': d.data.algo2,
                                        'graph_svg': d.data.graph_svg,
                                        'algo_text': d.data.algo_text,
                                        'algo_graph': d.data.algo_graph,
                                        'method_description': d.data.method_description,
                                        'name': d.data.name,
                                        'id': d.data.id
                                    },
                                    'code': DS.JSON.encode(d1.data)
                                };
                                download(DS.JSON.encode(export_), DS.page.getTaskField('name') + '_export.json', '', localStorage.getItem('SEND_TO_SERVER' + localStorage.getItem('student_id_for_trivia').toString()) == 'true');
                            }
                        });
                    });
                    DS.confirm('Вы действительно хотите отправить<br/>это задание на проверку?<br/>Вы не сможете вернуться<br/>к его редактированию.', function() {
                        localStorage.removeItem('IMPORT');
                        localStorage.removeItem('IMPORT_ENTER');
                        DS.progressWindow('Обработка...');
                        DS.ARM.taskControlRun(idTask, function(d) {
                            DS.progressWindow();
                            if (d.success) {
                                DS.page.endTask(function() {
                                    DS.msg('Отправлено', 'green');
                                }, true);
                            } else {
                                DS.msg('Произошла ошибка. Попробуйте снова', 'red');
                            }
                        });
                    }, null, true);
                };
                if (msgsTool.length) {
                    DS.confirm('Я подтверждаю, что все ошибки в следующих разделах были исправлены:<ul><li>' + msgsTool.join('</li><li>') + '</li></ul>', fn, null, true);
                } else {
                    fn();
                }
            });
        };
        // Initialize all required stuff, use `element` as render root
        this.initialize = function(element) {
            idTask = DS.page.getTaskField('id');
            var div = document.createElement('div');
            div.style.cssText = 'position: absolute;top: 50%;left: 50%;transform: translate(-50%,-50%);';
            var btn = document.createElement('button');
            btn.innerHTML = 'Сгенерировать отчет';
            btn.style.cssText = 'font-size: 2em;padding: 20px;';
            div.appendChild(btn);
            DS.addEvent(btn, 'click', function() {
                genReport();
            });
            element.appendChild(div);
            iFrameDiv = document.createElement('div');
            iFrameDiv.style.cssText = 'position: absolute;top: 0;left: 0;bottom: 0;right:0;display: none';
            iFrame = document.createElement('iframe');
            iFrame.style.cssText = 'border: 0; width: 100%; height: 100%;';
            iFrameDiv.appendChild(iFrame);
            element.appendChild(iFrameDiv);
        };
        // close task, finish all tasks and network queries, then run callback
        this.shutdown = function(callback) {
            callback();
        };
        // called after page show
        this.show = function() {
            menuGenerate = DS.page.topMenu.addButton('Сгенерировать отчет');
            DS.addEvent(menuGenerate, 'click', function() {
                genReport();
            });
            menuSend = DS.page.topMenu.addButton('Отправить на проверку');
            DS.addEvent(menuSend, 'click', function() {
                sendControl();
            });
            menuGetDocx = DS.page.topMenu.addButton('Загрузить DOCX');
            DS.addEvent(menuGetDocx, 'click', function() {
                // sendControl();
                DS.ARM.getTaskReportDocx(idTask, function(d) {
                    if (d.success) {
                        var pdf = new Blob([DS.base64.decode(d.data, true)], {
                            type: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
                        });
                        reportUrl = DOMURL.createObjectURL(pdf);
                        var a = document.createElement('a');
                        a.href = reportUrl;
                        a.download = 'Report.docx';
                        a.target = '_blank';
                        a.click();
                    }
                });
            });
        };
        // called before page hide
        this.hide = function() {
            DS.page.topMenu.removeButton(menuGenerate);
            DS.page.topMenu.removeButton(menuSend);
            DS.page.topMenu.removeButton(menuGetDocx);
            DS.css(iFrameDiv, 'display', 'none');
            if (reportUrl) {
                DOMURL.revokeObjectURL(reportUrl);
                reportUrl = null;
            }
        };
        this.getScripts = function() {
            return ([]);
        };
        this.getStyles = function() {
            return ({
                both: [
                    // 'css/modules/task.css'
                ],
                light: [
                    // 'css/modules/task-light.css'
                ],
                dark: [
                    // 'css/modules/task-dark.css'
                ]
            });
        };
    });
});