/**
 * An object that manages the main toolbar, including the different mode buttons.
 * This doesn't actually have many responsibilities after the initial load.
 *
 * @constructor
 * @this {BlockPyToolbar}
 * @param {Object} main - The main BlockPy instance
 * @param {HTMLElement} tag - The HTML object this is attached to.
 */
function BlockPyToolbar(main, tag) {
    this.main = main;
    this.tag = tag;

    // Holds the HTMLElement tags for each of the toolbar items
    this.tags = {};
    this.tags.mode_set_text = this.tag.find('.blockpy-mode-set-text');
    this.tags.filename_picker = this.tag.find('.blockpy-toolbar-filename-picker');

    // Actually set up the toolbar!
    this.activateToolbar();
}

BlockPyToolbar.prototype.notifyFeedbackUpdate = function () {
    this.tag.find(".blockpy-toolbar-feedback").show().fadeOut(7000);
}

/**
 * Register click events for more complex toolbar actions.
 */
BlockPyToolbar.prototype.activateToolbar = function () {
    var main = this.main;
    this.tag.find('.blockpy-run').click(function () {
        main.components.server.logEvent('editor', 'run')
        main.components.engine.on_run();
    });
    this.tags.mode_set_text.click(function () {
        main.components.server.logEvent('editor', 'text')
        main.model.settings.editor("Text");
    });
    this.tag.find('.blockpy-toolbar-reset').click(function () {
        main.model.programs['__main__'](main.model.programs['starting_code']());
        //main.components.editor.updateBlocks();
        main.components.server.logEvent('editor', 'reset');
        if (main.model.assignment.parsons()) {
            main.components.editor.blockly.shuffle();
        }
    });
    this.tag.find('.blockpy-toolbar-load-sample').click(function () {
        var blob = null;
        var xhr = new XMLHttpRequest();
        xhr.open("GET", "../20190114_python-blockly_plotting-temp-data.py");
        xhr.responseType = "blob"; //force the HTTP response, response-type header to be blob
        xhr.onload = function () {
            blob = xhr.response; //xhr.response is now a blob object
            var fr = new FileReader();
            fr.onload = function (e) {
                main.setCode(e.target.result)
                main.components.server.logEvent('editor', 'upload')
                main.components.engine.on_run();
            };
            fr.readAsText(blob);
        }
        xhr.send();


    });
    this.tag.find('.blockpy-mode-set-blocks').click(function (event) {
        if (main.model.areBlocksUpdating()) {
            main.components.server.logEvent('editor', 'blocks')
            main.model.settings.editor("Blocks");
        } else {
            event.preventDefault();
            return false;
        }
    });
    /*this.tag.find('.blockpy-mode-set-instructor').click(function() {
        main.model.settings.editor("Instructor");
        main.components.server.logEvent('editor', 'instructor')
    });*/
    this.tag.find('.blockpy-mode-set-split').click(function (event) {
        if (main.model.areBlocksUpdating()) {
            main.model.settings.editor("Split");
            main.components.server.logEvent('editor', 'split')
        } else {
            event.preventDefault();
            return false;
        }
    });
    this.tag.find('.blockpy-toolbar-import').click(function () {
        main.components.corgis.openDialog();
        main.components.server.logEvent('editor', 'import')
    });
    this.tag.find('.blockpy-toolbar-history').click(function () {
        main.components.history.openDialog();
        main.components.server.logEvent('editor', 'history')
    });
    var instructorDialog = this.main.model.constants.container.find('.blockpy-instructor-popup');
    this.tag.find('.blockpy-toolbar-instructor').click(function () {
        instructorDialog.modal({ 'backdrop': false }).modal('show');
        instructorDialog.draggable({
            'handle': '.modal-title'
        });
        main.components.server.logEvent('editor', 'instructor')
    });
    this.tag.find('.blockpy-toolbar-english').click(function () {
        main.components.english.openDialog();
        main.components.server.logEvent('editor', 'english')
    });
    // var uploadButton = this.tag.find('.blockpy-toolbar-upload');
    const uploadButton = $('#fileImport > input');
    uploadButton.change(function () {
        var fr = new FileReader();
        var files = uploadButton[0].files;
        const file = files[0];
        Ardublockly.alertExampleMessage(
            '',Ardublockly.getLocalStr('loadBlockBody'),
            true,{});
        fr.onload = function (e) {
            main.setCode(e.target.result)
            main.components.server.logEvent('editor', 'upload')
            main.components.engine.on_run();
        };
        fr.readAsText(file);
        setTimeout(() => {
            $('#loading').css({'display':'none'});
            $('#example_alert').modal('close');
        }, 300)
        $('#sketch_name').val(file.name.match(/(.+).py$/)[1]);
        uploadButton.val("");
    });

    const uploadXmlButton = $('#xmlFileImport > input');
    uploadXmlButton.change(function () {
        Ardublockly.handleFileSelect(event, uploadXmlButton[0].files);
        // var fr = new FileReader();
        // var files = uploadXmlButton[0].files;
        // const file = files[0];
        // fr.onload = function (e) {
        //     try {
        //         var xmlfile = Blockly.Xml.textToDom(e.target.result);
        //         blockpy.components.editor.setBlocksFromXml(xmlfile);
        //     } catch (e) {
        //         alert("无效的xml文件");
        //     }
        //     if (blockpy.components.editor.getBlocksFromXml().childNodes < 1) {
        //         alert("无效的xml文件");
        //     }
        // };
        // fr.readAsText(file);
        uploadXmlButton.val("");
    });

    $('#button_load').click(e => $('#xmlFileImport > input').click());
    $('#side_button_load').click(e => $('#xmlFileImport > input').click());
    $('#downloadbutton').click(downloadXml);

    function downloadCode() {
        var data = main.model.programs['__main__']();
        let filename = $('#sketch_name').val();
        let reg = new RegExp(/[^a-z0-9]/)
        // Make safe
        filename = reg.test(filename) ? filename : filename.replace(/[^a-z0-9]/gi, '_').toLowerCase();
        filename = filename + '.py'
        // Make the data download as a file
        var blob = new Blob([data], { type: 'text/plain' });
        if (window.navigator.msSaveOrOpenBlob) {
            window.navigator.msSaveBlob(blob, filename);
        } else {
            var elem = window.document.createElement('a');
            elem.href = window.URL.createObjectURL(blob);
            elem.download = filename;
            document.body.appendChild(elem);
            elem.click();
            document.body.removeChild(elem);
        }
        main.components.server.logEvent('editor', 'download')
    }

    /**
     * Save blocks as XML file. Note that MSIE 11 does not support
     * @param {String} filename 
    */
    function downloadXml() {

        var _xml = blockpy.components.editor.getBlocksFromXml();
        _xml.setAttribute("type", $("#mode")[0].selectedIndex == 1 ? "AI" : "IoT")
        var data = Blockly.Xml.domToPrettyText(_xml);
        let filename = $("#sketch_name").val() != '' ? $("#sketch_name").val() : "未命名";
        let reg = new RegExp(/[^a-z0-9]/)


        // Make safe
        filename = reg.test(filename) ? filename : filename.replace(/[^a-z0-9]/gi, '_').toLowerCase();
        filename = filename + '.xml'
        var blob = new Blob([data], { type: 'text/plain;charset=utf-8' });
        // if (window.navigator.msSaveOrOpenBlob) {
        // window.navigator.msSaveBlob(blob, filename);
        // } else {
        var elem = window.document.createElement('a');
        elem.href = window.URL.createObjectURL(blob);
        elem.download = filename;
        document.body.appendChild(elem);
        elem.click();
        document.body.removeChild(elem);
        // }
    }


    $("#AIYdownload").click(downloadCode);

    var downloadButton = this.tag.find('.blockpy-toolbar-download');
    downloadButton.click(downloadCode);

    // $('#button_save').click(downloadXml);
    // $('#side_button_save').click(downloadXml);

    this.tag.find('.blockpy-toolbar-filename-picker label').click(function () {
        main.model.settings.filename($(this).data('filename'))
    });



    $("#aiyModalRun").click(() => {
        console.log("click now")
        $("#modal_preload").css("display", "block");
        $("#aiyModalRun").addClass("disabled");
        setTimeout(() => {
            $("#modal_preload").css("display", "none");
            $("#aiyModalRun").removeClass("disabled");
        }, 2000)
    })
    $("#aiyModalStop").click(() => {
        console.log("click to stop")
    })



    /**
     * Bind a function to a drag event.
     * drag a file into the webpage 
     * @param {!Element|string} el drag  element or ID thereof.
     * @param {!function} func1 Drag over handler to bind.
     * @param {!function} func2 Drag leave handler to bind.
     * @private
     */
    function binddrag_(el, func1, func2) {
        if (typeof el == 'string') {
            el = document.getElementById(el);
        }
        el.addEventListener('dragenter', func1);
        el.addEventListener('dragover', (e) => {
            e.stopPropagation();
            e.preventDefault();
        });
        el.addEventListener('dragleave', func2);
    }

    /**
     * Bind a function to a drop event.
     * drop a file into the webpage 
     * @param {!Element|string} el drag  element or ID thereof.
     * @private
     */
    function binddrop_(el, func) {
        if (typeof el == 'string') {
            el = document.getElementById(el);
        }
        el.addEventListener('drop', func);
    }

    /**
     * handle File Select by drag from local folder 
     */
    function handleFileSelect(e) {
        // e.stopPropagation();
        // e.preventDefault();
        // var files = e.dataTransfer.files;
        // //检测是否是拖拽文件到页面的操作
        // if (files.length == 0) {
        //     return false;
        // }
        // //检测文件是不是xml
        // if (files[0].type.indexOf('text/xml') === -1) {
        //     // Ardublockly.alertMessage(
        //     //     Ardublockly.getLocalStr('ErrorFileDragTitle'),
        //     //     Ardublockly.getLocalStr('ErrorFileDragBody'),
        //     //     false);
        //     alert("ERROR!\n Unexcepted format of file is dragged\nOnly accept XML file")
        //     return false;
        // }
        // var fr = new FileReader();
        // const file = files[0];
        // fr.onload = function (e) {
        //     var xmlfile = Blockly.Xml.textToDom(e.target.result);
        //     blockpy.components.editor.setBlocksFromXml(xmlfile);
        // };
        // fr.readAsText(file);
        // $('#sketch_name').val(file.name.match(/(.+).xml$/)[1]);
    }

    /**
     * handle drag over function of local file
     */
    function handleDragEnter(e) {
        e.stopPropagation();
        e.preventDefault();
        e.dataTransfer.dropEffect = "copy";
    }

    /**
     * handle drag file leave the designated area
     */
    function handleDragLeave(e) {
        e.stopPropagation();
        e.preventDefault();
    }

    binddrag_('main_content', (e) => {
        handleDragEnter(e);
        $("#main_shadow").css("display", "block");
    });

    binddrag_('shadow_content', (e) => {
        handleDragEnter(e);
        $("#main_shadow").css("display", "block");
    }, (e) => {
        handleDragLeave(e);
        $("#main_shadow").css("display", "none");
    });

    binddrop_('shadow_content', (e) => {
        handleFileSelect(e);
        $("#main_shadow").css("display", "none");
    });

}