/*
   * Copyright (c) 2014
   *
   * This file is licensed under the Affero General Public License version 3
   * or later.
   *
   * See the COPYING-README file.
   *
   */
  
  /* global scanFiles, escapeHTML, formatDate */

  $(document).ready(function(){
  
  	if ($('#isPublic').val()){
  		// no versions actions in public mode
  		// beware of https://github.com/owncloud/core/issues/4545
  		// as enabling this might hang Chrome
  		return;
  	}

  	if (OCA.Files) {

  		// Add versions button to 'files/index.php'

  		OCA.Files.fileActions.register(
  			'file',
  			'Versions',
  			OC.PERMISSION_UPDATE,
  			function() {

  				// Specify icon for hitory button
  				return OC.imagePath('core','actions/history');

  			}, function(filename, context){

  				// Action to perform when clicked
  				if (scanFiles.scanning){return;}//workaround to prevent additional http request block scanning feedback

  				var file = context.dir.replace(/(?!<=\/)$|\/$/, '/' + filename);

  				var createDropDown = true;

  				// Check if drop down is already visible for a different file

  				if (($('#dropdown').length > 0) ) {
  					if ( $('#dropdown').hasClass('drop-versions') && file == $('#dropdown').data('file')) {
  						createDropDown = false;

  					}

  					$('#dropdown').remove();
  					$('tr').removeClass('mouseOver');
  				}
  
  				if(createDropDown === true) {

  					createVersionsDropdown(filename, file, context.fileList);

  				}

  			}, t('files_versions', 'Versions')

  		);
  	}

  	$(document).on("click", 'span[class="revertVersion"]', function() {
  		var revision = $(this).attr('id');
  		var file = $(this).attr('value');
  		revertFile(file, revision);
  	});

  });

  function revertFile(file, revision) {

  
  	$.ajax({
  		type: 'GET',

  		url: OC.linkTo('files_versions', 'ajax/rollbackVersion.php'),

  		dataType: 'json',

  		data: {file: file, revision: revision},

  		async: false,

  		success: function(response) {
  			if (response.status === 'error') {
  				OC.Notification.show( t('files_version', 'Failed to revert {file} to revision {timestamp}.', {file:file, timestamp:formatDate(revision * 1000)}) );
  			} else {
  				$('#dropdown').hide('blind', function() {

  					$('#dropdown').closest('tr').find('.modified:first').html(relative_modified_date(revision));

  					$('#dropdown').remove();
  					$('tr').removeClass('mouseOver');

  				});
  			}
  		}
  	});
  
  }

  function goToVersionPage(url){
  	window.location.assign(url);
  }

  function createVersionsDropdown(filename, files, fileList) {

  	var start = 0;

  	var fileEl;

  	var html = '<div id="dropdown" class="drop drop-versions" data-file="'+escapeHTML(files)+'">';
  	html += '<div id="private">';
  	html += '<ul id="found_versions">';
  	html += '</ul>';
  	html += '</div>';
  	html += '<input type="button" value="'+ t('files_versions', 'More versions...') + '" name="show-more-versions" id="show-more-versions" style="display: none;" />';

  	if (filename) {

  		fileEl = fileList.findFileEl(filename);

  		fileEl.addClass('mouseOver');
  		$(html).appendTo(fileEl.find('td.filename'));

  	} else {
  		$(html).appendTo($('thead .share'));
  	}

  	getVersions(start);
  	start = start + 5;

  	$("#show-more-versions").click(function() {
  		//get more versions
  		getVersions(start);
  		start = start + 5;

  	});

  	function getVersions(start) {

  		$.ajax({
  			type: 'GET',

  			url: OC.filePath('files_versions', 'ajax', 'getVersions.php'),

  			dataType: 'json',

  			data: {source: files, start: start},

  			async: false,

  			success: function(result) {
  				var versions = result.data.versions;
  				if (result.data.endReached === true) {
  					$("#show-more-versions").css("display", "none");

  				} else {

  					$("#show-more-versions").css("display", "block");
  				}
  				if (versions) {
  					$.each(versions, function(index, row) {
  						addVersion(row);

  					});

  				} else {
  					$('<div style="text-align:center;">'+ t('files_versions', 'No other versions available') + '</div>').appendTo('#dropdown');

  				}

  				$('#found_versions').change(function() {
  					var revision = parseInt($(this).val());
  					revertFile(files, revision);
  				});

  			}
  		});

  	}
  
  	function addVersion( revision ) {

  		var title = formatDate(revision.version*1000);
  		var name ='<span class="versionDate" title="' + title + '">' + revision.humanReadableTimestamp + '</span>';
  
  		var path = OC.filePath('files_versions', '', 'download.php');
  
  		var preview = '<img class="preview" src="'+revision.preview+'"/>';

  		var download ='<a href="' + path + "?file=" + encodeURIComponent(files) + '&revision=' + revision.version + '">';

  		download+='<img';
  		download+=' src="' + OC.imagePath('core', 'actions/download') + '"';
  		download+=' name="downloadVersion" />';
  		download+=name;
  		download+='</a>';
  
  		var revert='<span class="revertVersion"';

  		revert+=' id="' + revision.version + '">';

  		revert+='<img';
  		revert+=' src="' + OC.imagePath('core', 'actions/history') + '"';
  		revert+=' name="revertVersion"';
  		revert+='/>'+t('files_versions', 'Restore')+'</span>';
  
  		var version=$('<li/>');
  		version.attr('value', revision.version);
  		version.html(preview + download + revert);

  		// add file here for proper name escaping
  		version.find('span.revertVersion').attr('value', files);

  
  		version.appendTo('#found_versions');
  	}

  	$('#dropdown').show('blind');

  }
  
  $(this).click(
  	function(event) {
  	if ($('#dropdown').has(event.target).length === 0 && $('#dropdown').hasClass('drop-versions')) {
  		$('#dropdown').hide('blind', function() {
  			$('#dropdown').remove();
  			$('tr').removeClass('mouseOver');
  		});
  	}
  
  
  	}
  );