var topWin = window.dialogArguments || opener || parent || top, uploader, uploader_init;

function fileDialogStart() {
	jQuery("#media-upload-error").empty();
}

// progress and success handlers for media multi uploads
function fileQueued(fileObj) {
	// Get rid of unused form
	jQuery('.media-blank').remove();

	var items = jQuery('#media-items').children(), postid = post_id || 0;

	// Collapse a single item
	if ( items.length == 1 ) {
		items.removeClass('open').find('.slidetoggle').slideUp(200);
	}
	// Create a progress bar containing the filename
	jQuery('#media-items').append('<div id="media-item-' + fileObj.id + '" class="media-item child-of-' + postid + '"><div class="progress"><div class="percent">0%</div><div class="bar"></div></div><div class="filename original"> ' + fileObj.name + '</div></div>');

	// Disable submit
	jQuery('#insert-gallery').prop('disabled', true);
}

function uploadStart() {
	try {
		if ( typeof topWin.tb_remove != 'undefined' )
			topWin.jQuery('#TB_overlay').unbind('click', topWin.tb_remove);
	} catch(e){}

	return true;
}

function uploadProgress(up, file) {
	var item = jQuery('#media-item-' + file.id);

	jQuery('.bar', item).width( (200 * file.loaded) / file.size );
	jQuery('.percent', item).html( file.percent + '%' );
}

// check to see if a large file failed to upload
function fileUploading(up, file) {
	var hundredmb = 100 * 1024 * 1024, max = parseInt(up.settings.max_file_size, 10);

	if ( max > hundredmb && file.size > hundredmb ) {
		setTimeout(function(){
			if ( file.status == 2 && file.loaded == 0 ) { // not uploading
				wpFileError(file, pluploadL10n.big_upload_failed.replace('%1$s', '<a class="uploader-html" href="#">').replace('%2$s', '</a>'));

				if ( up.current && up.current.file.id == file.id && up.current.xhr.abort )
					up.current.xhr.abort();
			}
		}, 10000); // wait for 10 sec. for the file to start uploading
	}
}

function updateMediaForm() {
	var items = jQuery('#media-items').children();

	// Just one file, no need for collapsible part
	if ( items.length == 1 ) {
		items.addClass('open').find('.slidetoggle').show();
		jQuery('.insert-gallery').hide();
	} else if ( items.length > 1 ) {
		items.removeClass('open');
		// Only show Gallery button when there are at least two files.
		jQuery('.insert-gallery').show();
	}

	// Only show Save buttons when there is at least one file.
	if ( items.not('.media-blank').length > 0 )
		jQuery('.savebutton').show();
	else
		jQuery('.savebutton').hide();
}

function uploadSuccess(fileObj, serverData) {
	var item = jQuery('#media-item-' + fileObj.id);

	// on success serverData should be numeric, fix bug in html4 runtime returning the serverData wrapped in a <pre> tag
	serverData = serverData.replace(/^<pre>(\d+)<\/pre>$/, '$1');

	// if async-upload returned an error message, place it in the media item div and return
	if ( serverData.match('media-upload-error') ) {
		item.html(serverData);
		return;
	} else {
		jQuery('.percent', item).html( pluploadL10n.crunching );
	}

	prepareMediaItem(fileObj, serverData);
	updateMediaForm();

	// Increment the counter.
	if ( post_id && item.hasClass('child-of-' + post_id) )
		jQuery('#attachments-count').text(1 * jQuery('#attachments-count').text() + 1);
}

function setResize(arg) {
	if ( arg ) {
		if ( uploader.features.jpgresize )
			uploader.settings['resize'] = { width: resize_width, height: resize_height, quality: 100 };
		else
			uploader.settings.multipart_params.image_resize = true;
	} else {
		delete(uploader.settings.resize);
		delete(uploader.settings.multipart_params.image_resize);
	}
}

function prepareMediaItem(fileObj, serverData) {
	var f = ( typeof shortform == 'undefined' ) ? 1 : 2, item = jQuery('#media-item-' + fileObj.id);

	try {
		if ( typeof topWin.tb_remove != 'undefined' )
			topWin.jQuery('#TB_overlay').click(topWin.tb_remove);
	} catch(e){}

	if ( isNaN(serverData) || !serverData ) { // Old style: Append the HTML returned by the server -- thumbnail and form inputs
		item.append(serverData);
		prepareMediaItemInit(fileObj);
	} else { // New style: server data is just the attachment ID, fetch the thumbnail and form html from the server
		item.load('async-upload.php', {attachment_id:serverData, fetch:f}, function(){prepareMediaItemInit(fileObj);updateMediaForm()});
	}
}

function prepareMediaItemInit(fileObj) {
	var item = jQuery('#media-item-' + fileObj.id);
	// Clone the thumbnail as a "pinkynail" -- a tiny image to the left of the filename
	jQuery('.thumbnail', item).clone().attr('class', 'pinkynail toggle').prependTo(item);

	// Replace the original filename with the new (unique) one assigned during upload
	jQuery('.filename.original', item).replaceWith( jQuery('.filename.new', item) );

	// Bind AJAX to the new Delete button
	jQuery('a.delete', item).click(function(){
		// Tell the server to delete it. TODO: handle exceptions
		jQuery.ajax({
			url: 'admin-ajax.php',
			type: 'post',
			success: deleteSuccess,
			error: deleteError,
			id: fileObj.id,
			data: {
				id : this.id.replace(/[^0-9]/g, ''),
				action : 'trash-post',
				_ajax_nonce : this.href.replace(/^.*wpnonce=/,'')
			}
		});
		return false;
	});

	// Bind AJAX to the new Undo button
	jQuery('a.undo', item).click(function(){
		// Tell the server to untrash it. TODO: handle exceptions
		jQuery.ajax({
			url: 'admin-ajax.php',
			type: 'post',
			id: fileObj.id,
			data: {
				id : this.id.replace(/[^0-9]/g,''),
				action: 'untrash-post',
				_ajax_nonce: this.href.replace(/^.*wpnonce=/,'')
			},
			success: function(data, textStatus){
				var item = jQuery('#media-item-' + fileObj.id);

				if ( type = jQuery('#type-of-' + fileObj.id).val() )
					jQuery('#' + type + '-counter').text(jQuery('#' + type + '-counter').text()-0+1);

				if ( post_id && item.hasClass('child-of-'+post_id) )
					jQuery('#attachments-count').text(jQuery('#attachments-count').text()-0+1);

				jQuery('.filename .trashnotice', item).remove();
				jQuery('.filename .title', item).css('font-weight','normal');
				jQuery('a.undo', item).addClass('hidden');
				jQuery('.menu_order_input', item).show();
				item.css( {backgroundColor:'#ceb'} ).animate( {backgroundColor: '#fff'}, { queue: false, duration: 500, complete: function(){ jQuery(this).css({backgroundColor:''}); } }).removeClass('undo');
			}
		});
		return false;
	});

	// Open this item if it says to start open (e.g. to display an error)
	jQuery('#media-item-' + fileObj.id + '.startopen').removeClass('startopen').addClass('open').find('slidetoggle').fadeIn();
}

// generic error message
function wpQueueError(message) {
	jQuery('#media-upload-error').show().html( '<div class="error"><p>' + message + '</p></div>' );
}

// file-specific error messages
function wpFileError(fileObj, message) {
	itemAjaxError(fileObj.id, message);
}

function itemAjaxError(id, message) {
	var item = jQuery('#media-item-' + id), filename = item.find('.filename').text(), last_err = item.data('last-err');

	if ( last_err == id ) // prevent firing an error for the same file twice
		return;

	item.html('<div class="error-div">'
				+ '<a class="dismiss" href="#">' + pluploadL10n.dismiss + '</a>'
				+ '<strong>' + pluploadL10n.error_uploading.replace('%s', jQuery.trim(filename)) + '</strong> '
				+ message
				+ '</div>').data('last-err', id);
}

function deleteSuccess(data, textStatus) {
	if ( data == '-1' )
		return itemAjaxError(this.id, 'You do not have permission. Has your session expired?');

	if ( data == '0' )
		return itemAjaxError(this.id, 'Could not be deleted. Has it been deleted already?');

	var id = this.id, item = jQuery('#media-item-' + id);

	// Decrement the counters.
	if ( type = jQuery('#type-of-' + id).val() )
		jQuery('#' + type + '-counter').text( jQuery('#' + type + '-counter').text() - 1 );

	if ( post_id && item.hasClass('child-of-'+post_id) )
		jQuery('#attachments-count').text( jQuery('#attachments-count').text() - 1 );

	if ( jQuery('form.type-form #media-items').children().length == 1 && jQuery('.hidden', '#media-items').length > 0 ) {
		jQuery('.toggle').toggle();
		jQuery('.slidetoggle').slideUp(200).siblings().removeClass('hidden');
	}

	// Vanish it.
	jQuery('.toggle', item).toggle();
	jQuery('.slidetoggle', item).slideUp(200).siblings().removeClass('hidden');
	item.css( {backgroundColor:'#faa'} ).animate( {backgroundColor:'#f4f4f4'}, {queue:false, duration:500} ).addClass('undo');

	jQuery('.filename:empty', item).remove();
	jQuery('.filename .title', item).css('font-weight','bold');
	jQuery('.filename', item).append('<span class="trashnotice"> ' + pluploadL10n.deleted + ' </span>').siblings('a.toggle').hide();
	jQuery('.filename', item).append( jQuery('a.undo', item).removeClass('hidden') );
	jQuery('.menu_order_input', item).hide();

	return;
}

function deleteError(X, textStatus, errorThrown) {
	// TODO
}

function uploadComplete() {
	jQuery('#insert-gallery').prop('disabled', false);
}

function switchUploader(s) {
	if ( s ) {
		deleteUserSetting('uploader');
		jQuery('.media-upload-form').removeClass('html-uploader');

		if ( typeof(uploader) == 'object' )
			uploader.refresh();
	} else {
		setUserSetting('uploader', '1'); // 1 == html uploader
		jQuery('.media-upload-form').addClass('html-uploader');
	}
}

function dndHelper(s) {
	var d = document.getElementById('dnd-helper');

	if ( s ) {
		d.style.display = 'block';
	} else {
		d.style.display = 'none';
	}
}

function uploadError(fileObj, errorCode, message, uploader) {
	var hundredmb = 100 * 1024 * 1024, max;

	switch (errorCode) {
		case plupload.FAILED:
			wpFileError(fileObj, pluploadL10n.upload_failed);
			break;
		case plupload.FILE_EXTENSION_ERROR:
			wpFileError(fileObj, pluploadL10n.invalid_filetype);
			break;
		case plupload.FILE_SIZE_ERROR:
			uploadSizeError(uploader, fileObj);
			break;
		case plupload.IMAGE_FORMAT_ERROR:
			wpFileError(fileObj, pluploadL10n.not_an_image);
			break;
		case plupload.IMAGE_MEMORY_ERROR:
			wpFileError(fileObj, pluploadL10n.image_memory_exceeded);
			break;
		case plupload.IMAGE_DIMENSIONS_ERROR:
			wpFileError(fileObj, pluploadL10n.image_dimensions_exceeded);
			break;
		case plupload.GENERIC_ERROR:
			wpQueueError(pluploadL10n.upload_failed);
			break;
		case plupload.IO_ERROR:
			max = parseInt(uploader.settings.max_file_size, 10);

			if ( max > hundredmb && fileObj.size > hundredmb )
				wpFileError(fileObj, pluploadL10n.big_upload_failed.replace('%1$s', '<a class="uploader-html" href="#">').replace('%2$s', '</a>'));
			else
				wpQueueError(pluploadL10n.io_error);
			break;
		case plupload.HTTP_ERROR:
			wpQueueError(pluploadL10n.http_error);
			break;
		case plupload.INIT_ERROR:
			jQuery('.media-upload-form').addClass('html-uploader');
			break;
		case plupload.SECURITY_ERROR:
			wpQueueError(pluploadL10n.security_error);
			break;
/*		case plupload.UPLOAD_ERROR.UPLOAD_STOPPED:
		case plupload.UPLOAD_ERROR.FILE_CANCELLED:
			jQuery('#media-item-' + fileObj.id).remove();
			break;*/
		default:
			wpFileError(fileObj, pluploadL10n.default_error);
	}
}

function uploadSizeError( up, file, over100mb ) {
	var message;

	if ( over100mb )
		message = pluploadL10n.big_upload_queued.replace('%s', file.name) + ' ' + pluploadL10n.big_upload_failed.replace('%1$s', '<a class="uploader-html" href="#">').replace('%2$s', '</a>');
	else
		message = pluploadL10n.file_exceeds_size_limit.replace('%s', file.name);

	jQuery('#media-items').append('<div id="media-item-' + file.id + '" class="media-item error"><p>' + message + '</p></div>');
	up.removeFile(file);
}

jQuery(document).ready(function($){
	var insert_link, bookmark;

	$('.media-upload-form').bind('click.uploader', function(e) {
		var target = $(e.target), tr, c, el, textarea, sel, text, startPos, endPos;

		if ( target.hasClass('caption-insert-link') ) {
			el = target.siblings('div.caption-insert-link-wrap'), textarea = target.parent().siblings('textarea').get(0);

			if ( document.selection ) {
				textarea.focus();
				sel = document.selection.createRange();
				bookmark = sel.getBookmark();

				if ( sel.text )
					el.find('.caption-insert-link-text').val(sel.text);

			} else if ( textarea.selectionStart || textarea.selectionStart == '0' ) {
				text = textarea.value;
				startPos = textarea.selectionStart;
				endPos = textarea.selectionEnd;
				
				if ( startPos != endPos )
					el.find('.caption-insert-link-text').val( text.substring(startPos, endPos) );
			}

			target.hide();
			el.show();
			el.find('.caption-insert-link-url').focus();
		} else if ( target.hasClass('caption-cancel') || target.hasClass('caption-save') ) {
			el = target.closest('div.caption-insert-link-wrap');

			if ( target.hasClass('caption-save') )
				insert_link( el.closest('.edit-caption-controls').siblings('textarea'), el );
			
			el.hide();
			el.siblings('.caption-insert-link').show();
		} else if ( target.is('input[type="radio"]') ) { // remember the last used image size and alignment
			tr = target.closest('tr');

			if ( $(tr).hasClass('align') )
				setUserSetting('align', target.val());
			else if ( $(tr).hasClass('image-size') )
				setUserSetting('imgsize', target.val());

		} else if ( target.is('button.button') ) { // remember the last used image link url
			c = e.target.className || '';
			c = c.match(/url([^ '"]+)/);

			if ( c && c[1] ) {
				setUserSetting('urlbutton', c[1]);
				target.siblings('.urlfield').val( target.data('link-url') );
			}
		} else if ( target.is('a.dismiss') ) {
			target.parents('.media-item').fadeOut(200, function(){
				$(this).remove();
			});
		} else if ( target.is('.upload-flash-bypass a') || target.is('a.uploader-html') ) { // switch uploader to html4
			$('#media-items, p.submit, span.big-file-warning').css('display', 'none');
			switchUploader(0);
			e.preventDefault();
		} else if ( target.is('.upload-html-bypass a') ) { // switch uploader to multi-file
			$('#media-items, p.submit, span.big-file-warning').css('display', '');
			switchUploader(1);
			e.preventDefault();
		} else if ( target.is('a.describe-toggle-on') ) { // Show
			target.parent().addClass('open');
			target.siblings('.slidetoggle').fadeIn(250, function(){
				var S = $(window).scrollTop(), H = $(window).height(), top = $(this).offset().top, h = $(this).height(), b, B;

				if ( H && top && h ) {
					b = top + h;
					B = S + H;

					if ( b > B ) {
						if ( b - B < top - S )
							window.scrollBy(0, (b - B) + 10);
						else
							window.scrollBy(0, top - S - 40);
					}
				}
			});
			e.preventDefault();
		} else if ( target.is('a.describe-toggle-off') ) { // Hide
			target.siblings('.slidetoggle').fadeOut(250, function(){
				target.parent().removeClass('open');
			});
			e.preventDefault();
		}
	});
	
	insert_link = function(textarea, parent) {
		var sel, content, startPos, endPos, scrollTop, text,
			url = parent.find('.caption-insert-link-url'), link_text = parent.find('.caption-insert-link-text');

		if ( !url.length || !link_text.length )
			return;

		textarea = textarea.get(0);
		content = "<a href='"+url.val()+"'>"+link_text.val()+"</a>";

		if ( document.selection ) {
			textarea.focus();
			sel = document.selection.createRange();

			if ( bookmark ) {
				sel.moveToBookmark( bookmark );
				bookmark = '';
			}

			sel.text = content;
			textarea.focus();
		} else if ( textarea.selectionStart || textarea.selectionStart == '0' ) {
			text = textarea.value;
			startPos = textarea.selectionStart;
			endPos = textarea.selectionEnd;
			scrollTop = textarea.scrollTop;

			textarea.value = text.substring(0, startPos) + content + text.substring(endPos, text.length);

			textarea.focus();
			textarea.selectionStart = startPos + content.length;
			textarea.selectionEnd = startPos + content.length;
			textarea.scrollTop = scrollTop;
		}

		url.val('');
		link_text.val('');
	};

	// init and set the uploader
	uploader_init = function() {
		uploader = new plupload.Uploader(wpUploaderInit);

		$('#image_resize').bind('change', function() {
			var arg = $(this).prop('checked');

			setResize( arg );

			if ( arg )
				setUserSetting('upload_resize', '1');
			else
				deleteUserSetting('upload_resize');
		});

		uploader.bind('Init', function(up) {
			var uploaddiv = $('#plupload-upload-ui');

			setResize( getUserSetting('upload_resize', false) );

			if ( up.features.dragdrop ) {
				uploaddiv.addClass('drag-drop');
				$('#drag-drop-area').bind('dragover.wp-uploader', function(){ // dragenter doesn't fire right :(
					uploaddiv.addClass('drag-over');
				}).bind('dragleave.wp-uploader, drop.wp-uploader', function(){
					uploaddiv.removeClass('drag-over');
				});
			} else {
				uploaddiv.removeClass('drag-drop');
				$('#drag-drop-area').unbind('.wp-uploader');
			}
		});

		uploader.init();

		uploader.bind('FilesAdded', function(up, files) {
			var hundredmb = 100 * 1024 * 1024, max = parseInt(up.settings.max_file_size, 10);

			$('#media-upload-error').html('');
			uploadStart();

			plupload.each(files, function(file){
				if ( max > hundredmb && file.size > hundredmb && up.runtime != 'html5' )
					uploadSizeError( up, file, true );
				else
					fileQueued(file);
			});

			up.refresh();
			up.start();
		});

		uploader.bind('BeforeUpload', function(up, file) {
			// something
		});

		uploader.bind('UploadFile', function(up, file) {
			fileUploading(up, file);
		});

		uploader.bind('UploadProgress', function(up, file) {
			uploadProgress(up, file);
		});

		uploader.bind('Error', function(up, err) {
			uploadError(err.file, err.code, err.message, up);
			up.refresh();
		});

		uploader.bind('FileUploaded', function(up, file, response) {
			uploadSuccess(file, response.response);
		});

		uploader.bind('UploadComplete', function(up, files) {
			uploadComplete();
		});
	}

	if ( typeof(wpUploaderInit) == 'object' )
		uploader_init();

});