;(function($, mw) {
	'use strict';
	
	var preloads = 2;
	
	function globalFileUsage(i18n) {
		if (window.globalFileUsageInit) return;
		
		window.globalFileUsageInit = true;
		
		var action = mw.config.values.wgAction;
		var config = window.globalFileUsageConfig;
		
		if (mw.config.values.wgCanonicalSpecialPageName == 'Movepage') {
			action = 'move';
			if (!mw.config.values.wgTitle.includes('MovePage/File:')) return;
		}
		
		var space = mw.config.values.wgNamespaceNumber;
		
		if ((space != 6 && space != -1) || (action != 'view' && (action != 'delete' &&  action != 'move') ) || (action == 'delete' && config.hide_on_delete) || (action == 'move' && config.hide_on_move)) return;
		
		if (!window.globalFileUsageConfig || !window.globalFileUsageConfig.lang) {
			console.warn('File Global Usage: Add some languages in your config. Read manual for more information.');
			return;
		}
		
		importArticle({
			type: 'style',
			article: 'u:dev:MediaWiki:GlobalFileUsage.css'
		});
		
		var fullLangs		= config.lang;
		var format  		= '&format=json';
		var defaultSiteUrl  = mw.config.values.wgServer;
		var fileName		= mw.config.values.wgTitle;
		
		if (action == 'move')
			fileName = fileName.replace('MovePage/File:', '');
		
		var baseParams = '/api.php?action=query&titles=File:' + fileName;
		
		function showGUContainer(place, title, i18n) {
			// $('#global-usage-container').remove(); // for tests
			$(place).append('<div id="global-usage-container">' + title + '<p><button class="wds-button" id="show-global-usage-btn"><span>' + i18n.msg('button-show').plain() + '</span></button></p></div>');
			
			$('#show-global-usage-btn').click(function(){
				showGUTable(i18n);
			});
		}
		
		function showGUTable(i18n) {
			$('#global-usage-list').remove();
			$('#global-usage-container').append('<table id="global-usage-list" class="wikitable" style="width:100%"><tbody><tr><th>' + i18n.msg('lang').plain() + '</th><th>' + i18n.msg('page').plain() + '</th></tr></tbody></table>');
			
			fullLangs.forEach(function(fullLang) {
				var simpleLang = fullLang.split(':')[0];
				var langSubDomain = fullLang.split(':')[1];
				if ((simpleLang === mw.config.values.wgContentLanguage) && ((langSubDomain + '.fandom.com' === mw.config.values.wgServerName) ||(langSubDomain === undefined))) return;
				$('#global-usage-list').append('<tbody data-lang="' + fullLang + '"></tbody>');
				checkFile(defaultSiteUrl, baseParams, fullLang, i18n);
			});
			
			$('#show-global-usage-btn').text(i18n.msg('button-update').plain()).prop('disabled', true);
			
			setTimeout(function(){
				$('#show-global-usage-btn').prop('disabled', false);
			}, 1200);
		}
		
		var deleteWarning = '<div id="global-usage-delete-warning" hidden>' + i18n.msg('delete-warn').plain() + '</div>';
		var headerID = 'globalusage-dev';
		
		switch (action) {
			case 'view':
				showGUContainer('#mw-imagepage-section-linkstoimage, #mw-imagepage-nolinkstoimage', '<h3 id="' + headerID + '">' + i18n.msg('global').plain() + '</h3>', i18n);
				
				if (config.auto_show || $('#ca-delete').length)
					showGUTable(i18n);
			break;
			case 'delete':
				if (!config.hide_on_delete) {
					$('#mw-img-deleteconfirm').append(deleteWarning);
					
					showGUContainer('#mw-content-text', '<h2 id="' + headerID + '">' + i18n.msg('global-usage').plain() + '</h2>', i18n);
					showGUTable(i18n);
				}
			break;
			case 'move':
				if (!config.hide_on_move) {
					$('#movepage').append(deleteWarning);
					
					showGUContainer('#mw-content-text', '<h2 id="' + headerID + '">' + i18n.msg('global-usage').plain() + '</h2>', i18n);
					showGUTable(i18n);
				}
			break;
		}
		
		function checkFile(defaultSiteUrl, baseParams, fullLang, i18n) {
			var infoParams = baseParams + '&prop=imageinfo' + format + '&origin=*';
			
			var langUrl;
			var simpleLang = fullLang.split(':')[0];
			var langSubDomain = fullLang.split(':')[1];
			var langPath = (simpleLang === 'en') ? '' : '/' + simpleLang;
			if (langSubDomain == undefined) {
				langUrl = defaultSiteUrl + langPath;
			} else {
				langUrl = 'https://' + langSubDomain + '.fandom.com' + langPath;
			}
			var infoUrl = langUrl + infoParams;
			
			fetch(infoUrl)
				.then(function(response){
					return response.json();
				})
				.then(function(response) {
					var pages = response.query.pages;
					var repo = pages[Object.keys(pages)[0]].imagerepository;
					
					if (repo !== 'local') {
						var usageParams = baseParams + '&prop=fileusage' + format + '&origin=*';
						usageQuery(defaultSiteUrl, usageParams, fullLang, i18n);
					}
				});
		}
		
		function usageQuery(defaultSiteUrl, params, fullLang, i18n) {
			var usageUrl;
			var fullUrl;
			var simpleLang = fullLang.split(':')[0];
			var langSubDomain = fullLang.split(':')[1];
			var langPath = (simpleLang === 'en') ? '' : '/' + simpleLang;
			
			if (langSubDomain == undefined) {
				fullUrl = defaultSiteUrl + langPath;
				usageUrl = defaultSiteUrl + langPath + params;
			} else {
				fullUrl = 'https://' + langSubDomain + '.fandom.com' + langPath;
				usageUrl = 'https://' + langSubDomain + '.fandom.com' + langPath + params;
			}
			
			var $langRow = $('#global-usage-list [data-lang="' + fullLang + '"]');
			var langLabel = (config.show_subdomain_if_different) ? fullLang : simpleLang;
			
			config.showDeleteWarning = false;
			$('#global-usage-delete-warning').hide();
			
			fetch(usageUrl)
				.then(function(response){
					if (!response.ok) {
						$langRow.append('<tr class="global-usage-error"><td>' + langLabel + '</td><td colspan="2">' + i18n.msg('connection-error', fullUrl).plain() + '</td></tr>');
                    }
					return response.json();
				})
				.then(function(response) {
					var pages = response.query.pages;
					var usageInfo = pages[Object.keys(pages)[0]].fileusage;
					
					if (!usageInfo) return;
					
					if (!config.showDeleteWarning) {
						config.showDeleteWarning = true;
						$('#global-usage-delete-warning').show();
					}
					
					var list = '';
					
					usageInfo.forEach(function(item) {
						var fileLink = fullUrl + '/wiki/' + item.title;
						list += '<tr><td>' + langLabel + '</td><td><a href="' + fileLink + '" target="_blank">' + item.title + '</a></td></tr>';
					});
					$langRow.append(list);
				});
		}
		
		function globalFileUsageError(text) {
			$('#global-usage-container').append('<div class="warningbox">' + text + '</div>');
		}
	}
	
	function preload() {
		if (--preloads>0) return;
		window.dev.i18n.loadMessages('GlobalFileUsage').done(function(i18no) {
			i18no.useUserLang();
			globalFileUsage(i18no);
		});
	}
	
	mw.hook('wikipage.content').add(preload);
	mw.hook('dev.i18n').add(preload);
	
	importArticle({ type: 'script', article: 'u:dev:MediaWiki:I18n-js/code.js' });
})(window.jQuery, window.mediaWiki);