$(function () {

    var ul = $('#upload ul');

    $('#drop a').click(function () {
        // Simulate a click on the file input button
        // to show the file browser dialog
        $(this).parent().find('input').click();
    });

    // Initialize the jQuery File Upload plugin
    $('#upload').fileupload({

        // This element will accept file drag/drop uploading
        dropZone: $('#drop'),

        // This function is called when a file is added to the queue;
        // either via the browse button, or via drag/drop:
        add: function (e, data) {
            var tpl = $('<li class="working"><input type="text" value="0" data-width="48" data-height="48"' +
                    ' data-fgColor="#0788a5" data-readOnly="1" data-bgColor="#3e4043" /><p style="color:#AAA;" class="action">Uploading...</p><p class="filename"></p><span></span></li>');

            // Append the file name and file size
            tpl.find('p.filename').text(data.files[0].name)
                    .append('<i>' + formatFileSize(data.files[0].size) + '</i>');

            // Add the HTML to the UL element
            data.context = tpl.appendTo(ul);

            // Initialize the knob plugin
            tpl.find('input').knob();

            // Listen for clicks on the cancel icon
            tpl.find('span').click(function () {

                if (tpl.hasClass('working')) {
                    jqXHR.abort();
                }

                tpl.fadeOut(function () {
                    tpl.remove();
                });

            });

            // Automatically upload the file once it is added to the queue
            var jqXHR = data.submit();
        },

        progress: function (e, data) {

            // Calculate the completion percentage of the upload
            var progress = parseInt(data.loaded / data.total * 100, 10);

            // Update the hidden input field and trigger a change
            // so that the jQuery knob plugin knows to update the dial
            data.context.find('input').val(progress).change();

            if (progress == 100) {
                data.context.removeClass('working');
            }
        },

        fail: function (e, data) {
            // Something has gone wrong!
            data.context.addClass('error');
        },
        done: function (e, data) {
            if (data.result.status === "error") {
                if (typeof data.result.msg === 'string') {
                    msg = data.result.msg;
                } else {
                    msg = data.result.msg[data.result.msg.length - 1];
                }
                swal({
                    title: "Sorry!",
                    text: msg,
                    html: true,
                    type: "error"
                });
                data.context.addClass('error');
                data.context.find('p.action').text("Error");
            } else {
                data.context.find('p.action').html("Upload done go to <a href='mvideos'>video manager</a>");
                data.context.addClass('working');
            }
        }

    });

    // Prevent the default action when a file is dropped on the window
    $(document).on('drop dragover', function (e) {
        e.preventDefault();
    });

    // Helper function that formats the file sizes
    function formatFileSize(bytes) {
        if (typeof bytes !== 'number') {
            return '';
        }

        if (bytes >= 1000000000) {
            return (bytes / 1000000000).toFixed(2) + ' GB';
        }

        if (bytes >= 1000000) {
            return (bytes / 1000000).toFixed(2) + ' MB';
        }

        return (bytes / 1000).toFixed(2) + ' KB';
    }

});