{{-- 调用实例 --}}
{{--
@include('common.markdown_edit')
<textarea
    id="markdown-editor"
    name="name"
    placeholder="请输入至少三个字符的内容。"
    rows="6">{{ old('body', $article->body ) }}</textarea>
<script type="text/javascript">
    var markdown = new Markdown();
    markdown.init({
        'textarea': {
            'id': 'markdown-editor',
        }
    });
</script>
--}}

{{-- javascript --}}
<link rel="stylesheet" href="{{ assert_cdns('/fonts/font-awesome-4.7.0/css/font-awesome.min.css') }}">
<link rel="stylesheet" href="{{ assert_cdns('/ext/Simplemde_Markdown/dist/simplemde.min.css') }}">
<script src="{{ assert_cdns('/ext/Simplemde_Markdown/dist/simplemde.min.js') }}"></script>
<script src="{{ assert_cdns('/ext/InlineAttachment/dist/codemirror-4.inline-attachment.min.js') }}"></script>
<script src="{{ assert_cdns('/ext/Simplemde_Markdown/HtmlToMarkdown.js') }}"></script>

{{-- 加载 markdown 编辑器 --}}
<script type="text/javascript">
    class Markdown{
        constructor() {
            this.setting = {
                'textarea': {
                    'id': 'markdown-editor',
                },
                'interval': true,
                'markdown': {
                    element: document.getElementById('markdown-editor'),
                    autoDownloadFontAwesome: false,
                    spellChecker: false,
                    /*autosave: {
                        enabled: true,
                        delay: 5000,
                        unique_id: "article_content_"
                    },*/
                    forceSync: true,
                    tabSize: 4,
                    toolbar: [
                        "bold", "italic", "heading", "|", "quote", "code", "table",
                        "horizontal-rule", "unordered-list", "ordered-list", "|",
                        "link", "image", "|", "side-by-side", 'fullscreen', "|",
                        {
                            // 自定义[ 发布话题 ]
                            name: "publish",
                            action: function customFunction(editor) {
                                $(editor.element).closest('form').eq(0).submit();
                            },
                            className: "fa fa-paper-plane",
                            title: "{{ isset($_markdown['publish_title']) ? $_markdown['publish_title'] : '发布文章' }}",
                        },
                        {
                            // 自定义[ 清楚缓存 ]
                            name: "publish",
                            action: function customFunction(editor) {
                                localStorage.clear();
                                localStorage.clear();
                                localStorage.clear();
                                localStorage.clear();
                                localStorage.clear();
                                localStorage.clear();
                                alert('清理完成');
                            },
                            className: "fa fa-trash",
                            title: "清除本地缓存",
                        },
                        {
                            // 自定义标签
                            name: "guide",
                            action: function customFunction(editor) {
                                var win = window.open('https://github.com/riku/Markdown-Syntax-CN/blob/master/syntax.md', '_blank');
                                if (win) {
                                    //Browser has allowed it to be opened
                                    win.focus();
                                } else {
                                    //Browser has blocked it
                                    alert('Please allow popups for this website');
                                }
                            },
                            className: "fa fa-info-circle f_r",
                            title: "Markdown 语法！",
                        }
                    ],
                },
                'uploadFieldName': 'image',
                'jsonFieldName': 'path',
                'uploadUrl': Config.routes.upload_image,
                'events': {
                    change: function () {},
                }
            }

            /**
             * markdown 还原初始化
             * window['markdown_markdown-editor'].value('')
             */
        }

        init(opt){
            this.create($.extend(true, this.setting, opt));
        }

        create(setting){
            var self = this;
            if (document.getElementById(setting.textarea.id)) {
                $(document).ready(function () {
                    self.initSimpleMDE(setting);
                });
            } else {
                console.error('必须先创建好 textarea DOM节点后才可以调用 `init` 方法')
            }
        }

        initSimpleMDE(setting){
            var self = this;
            var turndownService = new TurndownService();
            setting.markdown.element = document.getElementById(setting.textarea.id);
            var simplemde = window['markdown_' + setting.textarea.id] = new SimpleMDE(setting.markdown);

            if(setting.interval){
                var interval = setInterval(function () {
                    if (simplemde.isFullscreenActive()) {
                        $('.duke-pulse.editor-fullscreen').hide();
                        $(window).trigger('resize');
                        clearInterval(interval);
                    }
                }, 1000);
            }

            simplemde.codemirror.on("refresh", function () {
                $(window).trigger('resize');
            });
            simplemde.codemirror.on("paste", function () {
                $(window).trigger('resize');
            });
            // 此处转多次是为了防止用户恶意输入
            simplemde.codemirror.on("change", function(){
                // markdown to html
                var html = simplemde.markdown(simplemde.value());
                // html to markdown
                var markdown = turndownService.turndown(html);
                // markdown to html
                html = simplemde.markdown(markdown);
                setting.events.change(html);
            });

            // 图片上传
            inlineAttachment.editors.codemirror4.attach(simplemde.codemirror, {
                uploadUrl: setting.uploadUrl,
                uploadFieldName: setting.uploadFieldName ? setting.uploadFieldName : 'file',
                jsonFieldName: setting.jsonFieldName ? setting.jsonFieldName : 'filename',
                extraParams: {
                    '_token': Config.token,
                    'image_type': 'article',
                },
                extraHeaders: {
                    'X-Requested-With': 'XMLHttpRequest',
                    'X-XSRF-TOKEN': Config.token,
                    'Authorization': Config.isApi ? document.head.querySelector('meta[name="jwt-token"]').content : ''
                },
                onFileUploadResponse: function(xhr) {
                    var result = JSON.parse(xhr.responseText),
                        filename = result[this.settings.jsonFieldName];

                    if (result && filename) {
                        // 拼接 cdns
                        filename = Config.routes.images_domain + filename;
                        var newValue;
                        if (typeof this.settings.urlText === 'function') {
                            newValue = this.settings.urlText.call(this, filename, result);
                        } else {
                            newValue = this.settings.urlText.replace(this.filenameTag, filename);
                        }
                        var text = this.editor.getValue().replace(this.lastValue, newValue);
                        this.editor.setValue(text);
                        this.settings.onFileUploaded.call(this, filename);
                    }
                    return false;
                }
            });
        }
    }
</script>