(function (mui, window, document, undefined) {
    mui.init();

    var get = function (id) {
        return document.getElementById(id);
    };
    var qsa = function (sel) {
        return [].slice.call(document.querySelectorAll(sel));
    };

    var ui = {
        imageList: get('image-list'),
        submit: get('submit')
    };

    ui.clearForm = function () {
        ui.imageList.innerHTML = '';
        ui.newPlaceholder();
    };

    ui.getFileInputArray = function () {
        return [].slice.call(ui.imageList.querySelectorAll('input[type="file"]'));
    };

    ui.getFileInputIdArray = function () {
        var fileInputArray = ui.getFileInputArray();
        var idArray = [];
        fileInputArray.forEach(function (fileInput) {
            if (fileInput.value != '') {
                idArray.push(fileInput.getAttribute('id'));
            }
        });
        return idArray;
    };

    var imageIndexIdNum = 0;
    ui.newPlaceholder = function () {
        var fileInputArray = ui.getFileInputArray();
        if (fileInputArray && fileInputArray.length > 0 && fileInputArray[fileInputArray.length - 1].parentNode.classList.contains('space')) {
            return;
        }
        imageIndexIdNum++;
        var placeholder = document.createElement('div');
        placeholder.setAttribute('class', 'image-item space');
        var closeButton = document.createElement('div');
        closeButton.setAttribute('class', 'image-close');
        closeButton.innerHTML = 'X';
        closeButton.addEventListener('click', function (event) {
            event.stopPropagation();
            event.cancelBubble = true;
            setTimeout(function () {
                ui.imageList.removeChild(placeholder);
            }, 0);
            return false;
        }, false);

        var fileInput = document.createElement('input');
        fileInput.setAttribute('type', 'file');
        fileInput.setAttribute('name', 'xxxx');
        fileInput.setAttribute('accept', 'image/*');
        fileInput.setAttribute('id', 'image-' + imageIndexIdNum);


        fileInput.addEventListener('change', function (event) {
            var file = fileInput.files[0];
           
            if (file) {
                var reader = new FileReader();
             
                reader.readAsDataURL(file);

                reader.onload = function () {
                    //处理 android 4.1 兼容问题
                    var base64 = reader.result.split(',')[1];
                    var dataUrl = 'data:image/png;base64,' + base64;
                    // 
                    placeholder.style.backgroundImage = 'url(' + dataUrl + ')';
                }

              
                placeholder.classList.remove('space');
                ui.newPlaceholder();
            }
        }, false);




        placeholder.appendChild(closeButton);
        placeholder.appendChild(fileInput);
        ui.imageList.appendChild(placeholder);
    };
    ui.newPlaceholder();










 
 
     


})(mui, window, document, undefined);