function ucFirst(str) {
	if (!str) return str;

	return str[0].toUpperCase() + str.slice(1);
}
let img_page = 1;
let mediaScanUrl = '/attachment/index?limit=20&page='+img_page+'&type=2';
// let mediaScanUrl = 'scan.php';

class MediaModal {
	constructor (modal = true)
	{
		this.isInit = false;
		this.isModal = modal;

		this.modalHtml =
			`
		<div class="modal fade modal-full" id="MediaModal" tabindex="-1" role="dialog" aria-labelledby="MediaModalLabel" aria-hidden="true">
		  <div class="modal-dialog modal-xl modal-dialog-scrollable" role="document">
			<div class="modal-content">
			  <div class="modal-header">
				<h5 class="modal-title" id="MediaModalLabel">资源文件</h5>
                
				<button type="button" class="btn btn-sm" data-bs-dismiss="modal" aria-label="Close">
				  <span aria-hidden="true"><i class="la la-times la-lg"></i></span>
				</button>
			  </div>
			  <div class="modal-body">
	
                      <div class="filemanager">

						<div class="top-right d-flex justify-content-between">
                             
                            <div class="align-left">          
								<div class="breadcrumbs"></div>
							</div>
                                       
                                   
                            <div class="align-right">                   
								<div class="search">
									<input type="search" id="media-search-input" placeholder="查找文件" />
								</div>
								
								<button class="btn btn-outline-secondary btn-sm btn-icon me-5 float-end" 
								   data-bs-toggle="collapse" 
								   data-bs-target=".upload" 
								   aria-expanded="false" 
								   >
								   <i class="la la-cloud-upload-alt la-lg"></i>
									上传新文件
								</button>
							</div>
							
						</div>

						<div class="top-panel">

							<div class="upload collapse">

								<button id="upload-close" type="button" class="btn btn-sm btn-light" aria-label="Close" data-bs-toggle="collapse" data-bs-target=".upload" aria-expanded="true">
								   <span aria-hidden="true"><i class="la la-times la-lg"></i></span>
								</button>
								
								
							   <h3>拖动或选择文件上传</h3>
							   
							   <input type="file" class="file"> 
								
								<div class="status"></div>
							</div>


						</div>
						
						<div class="display-panel">
							
							<ul class="data" id="media-files"></ul>
						
							<div class="nothingfound">
								<div class="nofiles"></div>
								<span>这里没有文件。</span>
							</div>
						</div>
					</div>

			  </div>
			  <div class="modal-footer justify-content-between">
			  
				<div class="align-left">
			
				</div>
			  
				<div class="align-right">
					<button type="button" class="btn btn-secondary" data-bs-dismiss="modal">关闭</button>
					<button type="button" class="btn btn-primary save-btn">添加选中</button>
				</div>
			  </div>
			</div>
		  </div>
		</div>`;

		this.response = [],
			this.currentPath = '';
		this.breadcrumbsUrls = [];
		this.filemanager = null;
		this.breadcrumbs = null;
		this.fileList = null;
		this.mediaPath = "/public/media/";
		this.type = "single";
	}

	addModalHtml() {
		if (this.isModal) $("body").append(this.modalHtml);
		$("#MediaModal .save-btn").on("click", () => this.save());
	}

	showUploadLoading() {
		$("#MediaModal .upload .status").html(`
		<div class="spinner-border" style="width: 5rem; height: 5rem;margin: 5rem auto; display:block" role="status">
		  <span class="visually-hidden">Loading...</span>
		</div>`);
	}

	hideUploadLoading() {
		$("#MediaModal .upload .status").html('');
		$("#MediaModal .upload .file").prop('outerHTML', $("#MediaModal .upload .file").prop('outerHTML'));
		$(".filemanager input[type=file]").on("change", this.onUpload);
	}

	save() {

		let file = $("#MediaModal .files input:checked").eq(0).val();
		if (this.targetInput) {
			$(this.targetInput).val(file).trigger("change");
		}

		if (file.indexOf("//") == -1) {
			file = this.mediaPath + file;
		}

		if (this.targetThumb) {
			$(this.targetThumb).attr("src", file);
		}

		if (this.callback) {
			this.callback(file);
		}

		if (this.isModal) $("#MediaModal").modal('hide');
	}

	init() {
		if (!this.isInit) {
			if (this.isModal) this.addModalHtml();
			let self = this;

			// this.initGallery();
			this.isInit = true;

			$(".filemanager input[type=file]").on("change", this.onUpload);

			$(window).trigger( "mediaModal:init", { type:this.type, targetInput:this.targetInput, targetThumb:this.targetThumb, callback:this.callback} );
		}
	}

	open(element, callback) {
		if (element instanceof Element) {
			this.targetInput = element.dataset.targetInput;
			this.targetThumb = element.dataset.targetThumb;
			if (element.dataset.type) {
				this.type = element.dataset.type;
			}
		} else if (element) {
			this.targetInput = element.targetInput;
			this.targetThumb = element.targetThumb;
			if (element.type) {
				this.type = element.type;
			}
		}

		this.callback = callback;
		this.init();

		if (this.isModal) $('#MediaModal').modal('show');
	}


	initGallery() {
		this.filemanager = $('.filemanager'),
			this.breadcrumbs = $('.breadcrumbs'),
			this.fileList = this.filemanager.find('.data');
		let _this = this;

		// Start by fetching the file data from scan.php with an AJAX request

		$.ajax({
			type: 'get',
			url: mediaScanUrl,
			headers: createHeader(),
			data: {},
			dataType: "json",
			success: function(res){
				// console.log(res, '接口返回');
				if (res.code && res.code != 0) {
					alert(res.msg)
					return ;
					// window.location.href = '/admin.php'
				}

				let list = res.data;
				let tempData = [];
				list.forEach(function (item, index) {
					tempData[index] = {
						"name": item.name,
						"path": item.url,
						"type": "file",
						"size": item.size
					}
				})

				_this.response = [{
					items:tempData,
					name:'',
					path:'',
					type:"folder"
				}],
					_this.currentPath = '',
					_this.breadcrumbsUrls = [];

				var folders = [],
					files = [];

				$(window).trigger('hashchange');
			}
		});


		// $.get('scan.php', function(data) {
		// //$.get('/this.filemanager/scan.php', function(data) {
		//
		// 	 _this.response = [data],
		// 	 _this.currentPath = '',
		// 	 _this.breadcrumbsUrls = [];
		//
		// 	var folders = [],
		// 		files = [];
		//
		// 	$(window).trigger('hashchange');
		// });

		// This event listener monitors changes on the URL. We use it to
		// capture back/forward navigation in the browser.

		$(window).on('hashchange', function(){

			_this.goto(window.location.hash);

			// We are triggering the event. This will execute
			// this function on page load, so that we show the correct folder:

		});


		// Hiding and showing the search box

		this.filemanager.find('.search').click(function(){

			var search = $(this);

			search.find('span').hide();
			search.find('input[type=search]').show().focus();

		});


		// Listening for keyboard input on the search field.
		// We are using the "input" event which detects cut and paste
		// in addition to keyboard input.
		this.filemanager.find('input[type=search]').on('input', function(e){

			var folders = [];
			var files = [];

			var value = this.value.trim();

			if(value.length) {

				_this.filemanager.addClass('searching');

				// Update the hash on every key stroke
				window.location.hash = 'search=' + value.trim();

			}

			else {

				_this.filemanager.removeClass('searching');
				window.location.hash = encodeURIComponent(_this.currentPath);

			}

		}).on('keyup', function(e){

			// Clicking 'ESC' button triggers focusout and cancels the search

			var search = $(this);

			if(e.keyCode == 27) {

				search.trigger('focusout');

			}

		}).focusout(function(e){

			// Cancel the search

			var search = $(this);

			if(!search.val().trim().length) {

				window.location.hash = encodeURIComponent(_this.currentPath);
				search.hide();
				search.parent().find('span').show();

			}

		});

		// Clicking on folders

		this.fileList.on('click', 'li.folders', function(e){
			e.preventDefault();

			var nextDir = $(this).find('a.folders').attr('href');

			if(_this.filemanager.hasClass('searching')) {

				// Building the this.breadcrumbs

				_this.breadcrumbsUrls = _this.generateBreadcrumbs(nextDir);

				_this.filemanager.removeClass('searching');
				_this.filemanager.find('input[type=search]').val('').hide();
				_this.filemanager.find('span').show();
			}
			else {
				_this.breadcrumbsUrls.push(nextDir);
			}

			window.location.hash = encodeURIComponent(nextDir);
			_this.currentPath = nextDir;
		});


		// Clicking on this.breadcrumbs

		this.breadcrumbs.on('click', 'a', function(e){
			e.preventDefault();

			var index = _this.breadcrumbs.find('a').index($(this)),
				nextDir = _this.breadcrumbsUrls[index];

			_this.breadcrumbsUrls.length = Number(index);

			window.location.hash = encodeURIComponent(nextDir);

		});
	}


	// Navigates to the given hash (path)

	goto(hash) {

		hash = decodeURIComponent(hash).slice(1).split('=');
		let _this = this;

		if (hash.length) {
			var rendered = '';

			// if hash has search in it

			if (hash[0] === 'search') {

				this.filemanager.addClass('searching');
				rendered = _this.searchData(_this.response, hash[1].toLowerCase());

				if (rendered.length) {
					this.currentPath = hash[0];
					this.render(rendered);
				}
				else {
					this.render(rendered);
				}

			}

			// if hash is some path

			else if (hash[0].trim().length) {

				rendered = this.searchByPath(hash[0]);

				if (rendered.length) {

					this.currentPath = hash[0];
					this.breadcrumbsUrls = this.generateBreadcrumbs(hash[0]);
					this.render(rendered);

				}
				else {
					this.currentPath = hash[0];
					this.breadcrumbsUrls = this.generateBreadcrumbs(hash[0]);
					this.render(rendered);
				}

			}

			// if there is no hash

			else {
				this.currentPath = this.response[0].path;
				this.breadcrumbsUrls.push(this.response[0].path);
				this.render(this.searchByPath(this.response[0].path));
			}
		}
	}

	// Splits a file path and turns it into clickable breadcrumbs
	_
	generateBreadcrumbs(nextDir){
		var path = nextDir.split('/').slice(0);
		for(var i=1;i<path.length;i++){
			path[i] = path[i-1]+ '/' +path[i];
		}
		return path;
	}


	// Locates a file by path

	searchByPath(dir) {
		var path = dir.split('/'),
			demo = this.response,
			flag = 0;

		for(var i=0;i<path.length;i++){
			for(var j=0;j<demo.length;j++){
				if(demo[j].name === path[i]){
					flag = 1;
					demo = demo[j].items;
					break;
				}
			}
		}

		//demo = flag ? demo : [];
		return demo;
	}


	// Recursively search through the file tree

	searchData(data, searchTerms) {

		let _this = this;
		let folders = [];
		let files = [];

		let _searchData = function (data, searchTerms) {
			data.forEach(function(d){
				if(d.type === 'folder') {

					_searchData(d.items,searchTerms);

					if(d.name.toLowerCase().indexOf(searchTerms) >= 0) {
						folders.push(d);
					}
				}
				else if(d.type === 'file') {
					if(d.name.toLowerCase().indexOf(searchTerms) >= 0) {
						files.push(d);
					}
				}
			});
		};

		_searchData(data, searchTerms);

		return {folders: folders, files: files};
	}


	onUpload(event) {

		// console.log('上传按钮修改！', this.files);

		let file;
		if (this.files && this.files[0]) {
			Vvveb.MediaModal.showUploadLoading();
			var reader = new FileReader();
			reader.onload = imageIsLoaded;
			reader.readAsDataURL(this.files[0]);
			//reader.readAsBinaryString(this.files[0]);
			file = this.files[0];
		}

		function imageIsLoaded(e) {

			let image = e.target.result;

			var formData = new FormData();
			formData.append("file", file);
			formData.append("mediaPath", Vvveb.MediaModal.mediaPath + Vvveb.MediaModal.currentPath);
			formData.append("onlyFilename", true);
			formData.append("attachment_cate_id", 0);
			formData.append("type", 2);

			$.ajax({
				type: "POST",
				url: '/attachment/uploadAndSave',//set your server side upload script url
				data: formData,
				headers: createHeader(),
				processData: false,
				contentType: false,
				success: function (res) {
					let data = res.data;
					Vvveb.MediaModal.addFile({
						name:data.name,
						type:"file",
						path: data.url,
						size:data.size
					},true);

					Vvveb.MediaModal.hideUploadLoading();

					var messageModal = new bootstrap.Modal(document.getElementById('message-modal'), {
						keyboard: false
					});
					$('#message-modal').css('z-index', '1065');
					$("#message-modal .modal-body").html('上传成功！');
					messageModal.show()

					$(window).trigger( "mediaModal:upload", { type:this.type, targetInput:this.targetInput, targetThumb:this.targetThumb, callback:this.callback} );
				},
				error: function (data) {
					alert(data.msg);
					Vvveb.MediaModal.hideUploadLoading();
				}
			});
		}
	}

	addFile(f, selected) {
		let _this= this;
		// _this.bytesToSize(f.size)
		var fileSize = f.size,
			name = _this.escapeHTML(f.name),
			fileType = name.split('.'),
			icon = '<span class="icon file"></span>';

		fileType = fileType[fileType.length-1];

		if (fileType == "jpg" || fileType == "jpeg" || fileType == "png" || fileType == "gif" || fileType == "svg" || fileType == "webp") {
			//icon = '<div class="image" style="background-image: url(' + _this.mediaPath + f.path + ');"></div>';
			icon = '<img class="image" loading="lazy" src="' + f.path + '">';
		} else {
			icon = '<span class="icon file f-'+fileType+'">.'+fileType+'</span>';
		}
		//icon = '<span class="icon file f-'+fileType+'">.'+fileType+'</span>';


		var file = $('<li class="files">\
						<label class="form-check">\
						  <input type="' + ((_this.type == "single") ? "radio" : "checkbox") + '" class="form-check-input" value="' + f.path + '" name="file[]" ' + ((selected == "single") ? "checked" : "") + '><span class="form-check-label"></span>\
						  <div href="#\" class="files">'+icon+'<div class="info"><div class="name">'+ name +'</div><span class="details">'+fileSize+'</span>\
							<a href="javascript:void(0);" class="preview-link"><i class="la la-search-plus"></i></a>\
							 <div class="preview">\
								<img src="' + f.path + '">\
								<div>\
									<span class="name">'+ name +'</span><span class="details">'+fileSize+'</span>\
								</div>\
							</div>\
						  </div>\
						</label>\
					</li>');

		let fileelement = file.appendTo(_this.fileList);
		if (selected) {
			$("input[type='radio'], input[type='checkbox']", fileelement).prop("checked", true);
		}
	}


	render(data) {

		var scannedFolders = [],
			scannedFiles = [];

		if(Array.isArray(data)) {

			data.forEach(function (d) {

				if (d.type === 'folder') {
					scannedFolders.push(d);
				}
				else if (d.type === 'file') {
					scannedFiles.push(d);
				}

			});

		}
		else if(typeof data === 'object') {

			scannedFolders = data.folders;
			scannedFiles = data.files;

		}


		// Empty the old result and make the new one

		this.fileList.empty();//.hide();
		if(!scannedFolders.length && !scannedFiles.length) {
			this.filemanager.find('.nothingfound').show();
		}
		else {
			this.filemanager.find('.nothingfound').hide();
		}

		let _this = this;

		if(scannedFolders.length) {

			scannedFolders.forEach(function(f) {

				var itemsLength = f.items.length,
					name = _this.escapeHTML(f.name),
					icon = '<span class="icon folder"></span>';

				if(itemsLength) {
					icon = '<span class="icon folder full"></span>';
				}

				if(itemsLength == 1) {
					itemsLength += ' item';
				}
				else if(itemsLength > 1) {
					itemsLength += ' items';
				}
				else {
					itemsLength = 'Empty';
				}

				var folder = $('<li class="folders"><a href="'+ f.path +'" title="'+ f.path +'" class="folders">'+icon+'<div class="info"><span class="name">' + name + '</span> <span class="details">' + itemsLength + '</span></div></a></li>');
				folder.appendTo(_this.fileList);
			});

		}

		if(scannedFiles.length) {

			scannedFiles.forEach(function(f) {

				_this.addFile(f);

			});

		}


		// Generate the breadcrumbs

		var url = '';

		if(this.filemanager.hasClass('searching')){

			url = '<span>Search results: </span>';
			this.fileList.removeClass('animated');

		}
		else {

			this.fileList.addClass('animated');

			this.breadcrumbsUrls.forEach(function (u, i) {

				var name = u.split('/');

				if (i !== _this.breadcrumbsUrls.length - 1) {
					url += '<a href="'+u+'"><span class="folderName">' + name[name.length-1] + '</span></a> <span class="arrow">→</span> ';
				}
				else {
					url += '<span class="folderName">' + name[name.length-1] + '</span>';
				}

			});

		}
		this.breadcrumbs.html('<a href="/"><i class="la la-home"></i><span class="folderName">&ensp;home</span></a>').append(url);



		// Show the generated elements

		this.fileList.animate({'display':'inline-block'});

	}


	// This function escapes special html characters in names

	escapeHTML(text) {
		return text.replace(/\&/g,'&amp;').replace(/\</g,'&lt;').replace(/\>/g,'&gt;');
	}


	// Convert file sizes from bytes to human readable units

	bytesToSize(bytes) {
		var sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB'];
		if (bytes == 0) return '0 Bytes';
		var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
		return Math.round(bytes / Math.pow(1024, i), 2) + ' ' + sizes[i];
	}
}
/*
export {
  MediaModal
}
*/