const htmlparser = require('htmlparser2');
const {MessageEmbed} = require('discord.js');
const {limit: {interwiki: interwikiLimit}, wikiProjects} = require('../../../util/default.json');
const Wiki = require('../../../util/wiki.js');

const fs = require('fs');
var fn = {
	special_page: require('../../../functions/special_page.js'),
	discussion: require('../../../functions/discussion.js')
};
fs.readdir( './cmds/wiki/fandom', (error, files) => {
	if ( error ) return error;
	files.filter( file => ( file !== 'general.js' && file.endsWith('.js') ) ).forEach( file => {
		var command = require('./' + file);
		fn[command.name] = command.run;
	} );
} );

/**
 * Checks a Fandom wiki.
 * @param {import('../../../util/i18n.js')} lang - The user language.
 * @param {import('discord.js').Message} msg - The Discord message.
 * @param {String} title - The page title.
 * @param {Wiki} wiki - The wiki for the page.
 * @param {String} cmd - The command at this point.
 * @param {import('discord.js').MessageReaction} reaction - The reaction on the message.
 * @param {String} [spoiler] - If the response is in a spoiler.
 * @param {URLSearchParams} [querystring] - The querystring for the link.
 * @param {String} [fragment] - The section for the link.
 * @param {String} [interwiki] - The fallback interwiki link.
 * @param {Number} [selfcall] - The amount of followed interwiki links.
 */
function fandom_check_wiki(lang, msg, title, wiki, cmd, reaction, spoiler = '', querystring = new URLSearchParams(), fragment = '', interwiki = '', selfcall = 0) {
	var full_title = title;
	if ( title.includes( '#' ) ) {
		fragment = title.split('#').slice(1).join('#');
		title = title.split('#')[0];
	}
	if ( /\?\w+=/.test(title) ) {
		var querystart = title.search(/\?\w+=/);
		querystring = new URLSearchParams(querystring + '&' + title.substring(querystart + 1));
		title = title.substring(0, querystart);
	}
	if ( title.length > 250 ) {
		title = title.substring(0, 250);
		msg.reactEmoji('⚠️');
	}
	var invoke = title.split(' ')[0].toLowerCase();
	var aliasInvoke = ( lang.aliases[invoke] || invoke );
	var args = title.split(' ').slice(1);
	
	if ( aliasInvoke === 'random' && !args.join('') && !querystring.toString() && !fragment ) {
		return fn.random(lang, msg, wiki, reaction, spoiler);
	}
	if ( aliasInvoke === 'overview' && !args.join('') && !querystring.toString() && !fragment ) {
		return fn.overview(lang, msg, wiki, reaction, spoiler);
	}
	if ( aliasInvoke === 'test' && !args.join('') && !querystring.toString() && !fragment ) {
		this.test(lang, msg, args, '', wiki);
		if ( reaction ) reaction.removeEmoji();
		return;
	}
	if ( aliasInvoke === 'page' ) {
		msg.sendChannel( spoiler + '<' + wiki.toLink(args.join('_'), querystring, fragment) + '>' + spoiler );
		if ( reaction ) reaction.removeEmoji();
		return;
	}
	if ( aliasInvoke === 'diff' && args.join('') && !querystring.toString() && !fragment ) {
		return fn.diff(lang, msg, args, wiki, reaction, spoiler);
	}
	var noRedirect = ( querystring.getAll('redirect').pop() === 'no' || ( querystring.has('action') && querystring.getAll('action').pop() !== 'view' ) );
	got.get( wiki + 'api.php?action=query&meta=allmessages|siteinfo&ammessages=description&amenableparser=true&siprop=general|namespaces|specialpagealiases|wikidesc&iwurl=true' + ( noRedirect ? '' : '&redirects=true' ) + '&prop=imageinfo|categoryinfo&converttitles=true&titles=' + encodeURIComponent( title.replace( /\|/g, '\ufffd' ) ) + '&format=json' ).then( response => {
		var body = response.body;
		if ( body && body.warnings ) log_warn(body.warnings);
		if ( response.statusCode !== 200 || !body || !body.query ) {
			if ( interwiki ) msg.sendChannel( spoiler + ' ' + interwiki + ' ' + spoiler );
			else if ( wiki.noWiki(response.url, response.statusCode) ) {
				console.log( '- This wiki doesn\'t exist!' );
				msg.reactEmoji('nowiki');
			}
			else {
				console.log( '- ' + response.statusCode + ': Error while getting the search results: ' + ( body && body.error && body.error.info ) );
				msg.sendChannelError( spoiler + '<' + wiki.toLink(( querystring.toString() || fragment || !title ? title : 'Special:Search' ), ( querystring.toString() || fragment || !title ? querystring : {search:title} ), fragment) + '>' + spoiler );
			}
			
			if ( reaction ) reaction.removeEmoji();
			return;
		}
		wiki.updateWiki(body.query.general);
		if ( aliasInvoke === 'search' ) {
			return fn.search(lang, msg, full_title.split(' ').slice(1).join(' '), wiki, body.query, reaction, spoiler);
		}
		if ( aliasInvoke === 'discussion' && !querystring.toString() && !fragment ) {
			return fn.discussion(lang, msg, wiki, args.join(' '), body.query, reaction, spoiler);
		}
		if ( body.query.pages ) {
			var querypages = Object.values(body.query.pages);
			var querypage = querypages[0];
			if ( body.query.redirects && body.query.redirects[0].from.split(':')[0] === body.query.namespaces['-1']['*'] && body.query.specialpagealiases.filter( sp => ['Mypage','Mytalk','MyLanguage'].includes( sp.realname ) ).map( sp => sp.aliases[0] ).includes( body.query.redirects[0].from.split(':').slice(1).join(':').split('/')[0].replace( / /g, '_' ) ) ) {
				querypage.title = body.query.redirects[0].from;
				delete body.query.redirects[0].tofragment;
				delete querypage.missing;
				querypage.ns = -1;
				querypage.special = '';
			}
			
			var contribs = body.query.namespaces['-1']['*'] + ':' + body.query.specialpagealiases.find( sp => sp.realname === 'Contributions' ).aliases[0] + '/';
			if ( querypage.ns === 2 && ( !querypage.title.includes( '/' ) || /^[^:]+:(?:(?:\d{1,3}\.){3}\d{1,3}\/\d{2}|(?:[\dA-F]{1,4}:){7}[\dA-F]{1,4}\/\d{2,3})$/.test(querypage.title) ) ) {
				var userparts = querypage.title.split(':');
				querypage.noRedirect = noRedirect;
				fn.user(lang, msg, userparts[0] + ':', userparts.slice(1).join(':'), wiki, querystring, fragment, querypage, contribs, reaction, spoiler);
			}
			else if ( querypage.ns === -1 && querypage.title.startsWith( contribs ) && querypage.title.length > contribs.length ) {
				var username = querypage.title.split('/').slice(1).join('/');
				got.get( wiki + 'api.php?action=query&titles=User:' + encodeURIComponent( username ) + '&format=json' ).then( uresponse => {
					var ubody = uresponse.body;
					if ( uresponse.statusCode !== 200 || !ubody || !ubody.query ) {
						console.log( '- ' + uresponse.statusCode + ': Error while getting the user: ' + ( ubody && ubody.error && ubody.error.info ) );
						msg.sendChannelError( spoiler + '<' + wiki.toLink(contribs + username, querystring, fragment) + '>' + spoiler );
						
						if ( reaction ) reaction.removeEmoji();
					}
					else {
						querypage = Object.values(ubody.query.pages)[0];
						if ( querypage.ns === 2 ) {
							username = querypage.title.split(':').slice(1).join(':');
							querypage.title = contribs + username;
							delete querypage.missing;
							querypage.ns = -1;
							querypage.special = '';
							querypage.noRedirect = noRedirect;
							fn.user(lang, msg, contribs, username, wiki, querystring, fragment, querypage, contribs, reaction, spoiler);
						}
						else {
							msg.reactEmoji('error');
							
							if ( reaction ) reaction.removeEmoji();
						}
					}
				}, error => {
					console.log( '- Error while getting the user: ' + error );
					msg.sendChannelError( spoiler + '<' + wiki.toLink(contribs + username, querystring, fragment) + '>' + spoiler );
					
					if ( reaction ) reaction.removeEmoji();
				} );
			}
			else if ( querypage.ns === 1201 && querypage.missing !== undefined ) {
				var thread = querypage.title.split(':');
				got.get( wiki + 'api.php?action=query&prop=revisions&rvprop=user&rvdir=newer&rvlimit=1&pageids=' + thread.slice(1).join(':') + '&format=json' ).then( thresponse => {
					var thbody = thresponse.body;
					if ( thresponse.statusCode !== 200 || !thbody || !thbody.query || !thbody.query.pages ) {
						console.log( '- ' + thresponse.statusCode + ': Error while getting the thread: ' + ( thbody && thbody.error && thbody.error.info ) );
						msg.sendChannelError( spoiler + '<' + wiki.toLink(querypage.title, querystring, fragment) + '>' + spoiler );
						
						if ( reaction ) reaction.removeEmoji();
					}
					else {
						querypage = thbody.query.pages[thread.slice(1).join(':')];
						if ( querypage.missing !== undefined ) {
							msg.reactEmoji('🤷');
							
							if ( reaction ) reaction.removeEmoji();
						}
						else {
							var pagelink = wiki.toLink(thread.join(':'), querystring, fragment);
							var embed = new MessageEmbed().setAuthor( body.query.general.sitename ).setTitle( thread.join(':').escapeFormatting() ).setURL( pagelink ).setFooter( querypage.revisions[0].user );
							got.get( wiki.toDescLink(querypage.title), {
								responseType: 'text'
							} ).then( descresponse => {
								var descbody = descresponse.body;
								if ( descresponse.statusCode !== 200 || !descbody ) {
									console.log( '- ' + descresponse.statusCode + ': Error while getting the description.' );
								} else {
									var thumbnail = wiki.toLink('Special:FilePath/Wiki-wordmark.png');
									var parser = new htmlparser.Parser( {
										onopentag: (tagname, attribs) => {
											if ( tagname === 'meta' && attribs.property === 'og:description' ) {
												var description = attribs.content.escapeFormatting();
												if ( description.length > 1000 ) description = description.substring(0, 1000) + '\u2026';
												embed.setDescription( description );
											}
											if ( tagname === 'meta' && attribs.property === 'og:image' ) {
												thumbnail = attribs.content;
											}
										}
									} );
									parser.write( descbody );
									parser.end();
									embed.setThumbnail( thumbnail );
								}
							}, error => {
								console.log( '- Error while getting the description: ' + error );
							} ).finally( () => {
								msg.sendChannel( spoiler + '<' + pagelink + '>' + spoiler, {embed} );
								
								if ( reaction ) reaction.removeEmoji();
							} );
						}
					}
				}, error => {
					console.log( '- Error while getting the thread: ' + error );
					msg.sendChannelError( spoiler + '<' + wiki.toLink(querypage.title, querystring, fragment) + '>' + spoiler );
					
					if ( reaction ) reaction.removeEmoji();
				} );
			}
			else if ( ( querypage.missing !== undefined && querypage.known === undefined && !( noRedirect || querypage.categoryinfo ) ) || querypage.invalid !== undefined ) {
				got.get( wiki + 'api/v1/Search/List?minArticleQuality=0&namespaces=4,12,14,' + Object.values(body.query.namespaces).filter( ns => ns.content !== undefined ).map( ns => ns.id ).join(',') + '&limit=1&query=' + encodeURIComponent( title ) + '&format=json&cache=' + Date.now() ).then( wsresponse => {
					var wsbody = wsresponse.body;
					if ( wsresponse.statusCode !== 200 || !wsbody || wsbody.exception || !wsbody.total || !wsbody.items || !wsbody.items.length ) {
						if ( wsbody && ( !wsbody.total || ( wsbody.items && !wsbody.items.length ) || ( wsbody.exception && wsbody.exception.code === 404 ) ) ) msg.reactEmoji('🤷');
						else {
							console.log( '- ' + wsresponse.statusCode + ': Error while getting the search results: ' + ( wsbody && wsbody.exception && wsbody.exception.details ) );
							msg.sendChannelError( spoiler + '<' + wiki.toLink('Special:Search', {search:title}) + '>' + spoiler );
						}
						
						if ( reaction ) reaction.removeEmoji();
					}
					else {
						querypage = wsbody.items[0];
						if ( querypage.ns && !querypage.title.startsWith( body.query.namespaces[querypage.ns]['*'] + ':' ) ) {
							querypage.title = body.query.namespaces[querypage.ns]['*'] + ':' + querypage.title;
						}
						
						var text = '';
						var prefix = ( msg.channel.isGuild() && patreons[msg.guild.id] || process.env.prefix );
						var linksuffix = ( querystring.toString() ? '?' + querystring : '' ) + ( fragment ? '#' + fragment : '' );
						if ( title.replace( /[_-]/g, ' ' ).toLowerCase() === querypage.title.replace( /-/g, ' ' ).toLowerCase() ) {
							text = '';
						}
						else if ( wsbody.total === 1 ) {
							text = '\n' + lang.get('search.infopage', '`' + prefix + cmd + ( lang.localNames.page || 'page' ) + ' ' + title + linksuffix + '`');
						}
						else {
							text = '\n' + lang.get('search.infosearch', '`' + prefix + cmd + ( lang.localNames.page || 'page' ) + ' ' + title + linksuffix + '`', '`' + prefix + cmd + ( lang.localNames.search || 'search' ) + ' ' + title + linksuffix + '`');
						}
						got.get( wiki + 'api.php?action=query&prop=imageinfo|categoryinfo&titles=' + encodeURIComponent( querypage.title ) + '&format=json' ).then( srresponse => {
							var srbody = srresponse.body;
							if ( srbody && srbody.warnings ) log_warn(srbody.warnings);
							if ( srresponse.statusCode !== 200 || !srbody || !srbody.query || !srbody.query.pages ) {
								console.log( '- ' + srresponse.statusCode + ': Error while getting the search results: ' + ( srbody && srbody.error && srbody.error.info ) );
								msg.sendChannelError( spoiler + '<' + wiki.toLink(querypage.title, querystring, fragment) + '>' + spoiler );
								
								if ( reaction ) reaction.removeEmoji();
							}
							else {
								querypage = Object.values(srbody.query.pages)[0];
								var pagelink = wiki.toLink(querypage.title, querystring, fragment);
								var embed = new MessageEmbed().setAuthor( body.query.general.sitename ).setTitle( querypage.title.escapeFormatting() ).setURL( pagelink );
								if ( querypage.imageinfo ) {
									var filename = querypage.title.replace( body.query.namespaces['6']['*'] + ':', '' );
									var pageimage = wiki.toLink('Special:FilePath/' + filename, {version:Date.now()});
									if ( msg.showEmbed() && /\.(?:png|jpg|jpeg|gif)$/.test(querypage.title.toLowerCase()) ) embed.setImage( pageimage );
									else if ( msg.uploadFiles() ) embed.attachFiles( [{attachment:pageimage,name:( spoiler ? 'SPOILER ' : '' ) + filename}] );
								}
								if ( querypage.categoryinfo ) {
									var category = [lang.get('search.category.content')];
									if ( querypage.categoryinfo.size === 0 ) {
										category.push(lang.get('search.category.empty'));
									}
									if ( querypage.categoryinfo.pages > 0 ) {
										category.push(lang.get('search.category.pages', querypage.categoryinfo.pages));
									}
									if ( querypage.categoryinfo.files > 0 ) {
										category.push(lang.get('search.category.files', querypage.categoryinfo.files));
									}
									if ( querypage.categoryinfo.subcats > 0 ) {
										category.push(lang.get('search.category.subcats', querypage.categoryinfo.subcats));
									}
									if ( msg.showEmbed() ) embed.addField( category[0], category.slice(1).join('\n') );
									else text += '\n\n' + category.join('\n');
								}
								
								if ( querypage.title === body.query.general.mainpage && body.query.allmessages[0]['*'] ) {
									embed.setDescription( body.query.allmessages[0]['*'] );
									embed.setThumbnail( wiki.toLink('Special:FilePath/Wiki-wordmark.png') );
									
									msg.sendChannel( spoiler + '<' + pagelink + '>' + text + spoiler, {embed} );
									
									if ( reaction ) reaction.removeEmoji();
								}
								else got.get( wiki.toDescLink(querypage.title), {
									responseType: 'text'
								} ).then( descresponse => {
									var descbody = descresponse.body;
									if ( descresponse.statusCode !== 200 || !descbody ) {
										console.log( '- ' + descresponse.statusCode + ': Error while getting the description.' );
									} else {
										var thumbnail = wiki.toLink('Special:FilePath/Wiki-wordmark.png');
										var parser = new htmlparser.Parser( {
											onopentag: (tagname, attribs) => {
												if ( tagname === 'meta' && attribs.property === 'og:description' ) {
													var description = attribs.content.escapeFormatting();
													if ( description.length > 1000 ) description = description.substring(0, 1000) + '\u2026';
													embed.setDescription( description );
												}
												if ( tagname === 'meta' && attribs.property === 'og:image' && querypage.title !== body.query.general.mainpage ) {
													thumbnail = attribs.content;
												}
											}
										}, {decodeEntities:true} );
										parser.write( descbody );
										parser.end();
										if ( !querypage.imageinfo ) embed.setThumbnail( thumbnail );
									}
								}, error => {
									console.log( '- Error while getting the description: ' + error );
								} ).finally( () => {
									msg.sendChannel( spoiler + '<' + pagelink + '>' + text + spoiler, {embed} );
									
									if ( reaction ) reaction.removeEmoji();
								} );
							}
						}, error => {
							console.log( '- Error while getting the search results: ' + error );
							msg.sendChannelError( spoiler + '<' + wiki.toLink(querypage.title, querystring, fragment) + '>' + spoiler );
							
							if ( reaction ) reaction.removeEmoji();
						} );
					}
				}, error => {
					console.log( '- Error while getting the search results: ' + error );
					msg.sendChannelError( spoiler + '<' + wiki.toLink('Special:Search', {search:title}) + '>' + spoiler );
					
					if ( reaction ) reaction.removeEmoji();
				} );
			}
			else if ( querypage.ns === -1 ) {
				var pagelink = wiki.toLink(querypage.title, querystring, fragment);
				var embed =  new MessageEmbed().setAuthor( body.query.general.sitename ).setTitle( querypage.title.escapeFormatting() ).setURL( pagelink ).setThumbnail( wiki.toLink('Special:FilePath/Wiki-wordmark.png') );
				var specialpage = body.query.specialpagealiases.find( sp => body.query.namespaces['-1']['*'] + ':' + sp.aliases[0].replace( /\_/g, ' ' ) === querypage.title.split('/')[0] );
				specialpage = ( specialpage ? specialpage.realname : querypage.title.replace( body.query.namespaces['-1']['*'] + ':', '' ).split('/')[0] ).toLowerCase();
				fn.special_page(lang, msg, querypage.title, specialpage, embed, wiki, reaction, spoiler);
			}
			else {
				var pagelink = wiki.toLink(querypage.title, querystring, ( fragment || ( body.query.redirects && body.query.redirects[0].tofragment || '' ) ));
				var text = '';
				var embed = new MessageEmbed().setAuthor( body.query.general.sitename ).setTitle( querypage.title.escapeFormatting() ).setURL( pagelink );
				if ( querypage.imageinfo ) {
					var filename = querypage.title.replace( body.query.namespaces['6']['*'] + ':', '' );
					var pageimage = wiki.toLink('Special:FilePath/' + filename, {version:Date.now()});
					if ( msg.showEmbed() && /\.(?:png|jpg|jpeg|gif)$/.test(querypage.title.toLowerCase()) ) embed.setImage( pageimage );
					else if ( msg.uploadFiles() ) embed.attachFiles( [{attachment:pageimage,name:( spoiler ? 'SPOILER ' : '' ) + filename}] );
				}
				if ( querypage.categoryinfo ) {
					var category = [lang.get('search.category.content')];
					if ( querypage.categoryinfo.size === 0 ) {
						category.push(lang.get('search.category.empty'));
					}
					if ( querypage.categoryinfo.pages > 0 ) {
						category.push(lang.get('search.category.pages', querypage.categoryinfo.pages));
					}
					if ( querypage.categoryinfo.files > 0 ) {
						category.push(lang.get('search.category.files', querypage.categoryinfo.files));
					}
					if ( querypage.categoryinfo.subcats > 0 ) {
						category.push(lang.get('search.category.subcats', querypage.categoryinfo.subcats));
					}
					if ( msg.showEmbed() ) embed.addField( category[0], category.slice(1).join('\n') );
					else text += '\n\n' + category.join('\n');
				}
				
				if ( querypage.title === body.query.general.mainpage && body.query.allmessages[0]['*'] ) {
					embed.setDescription( body.query.allmessages[0]['*'] );
					embed.setThumbnail( wiki.toLink('Special:FilePath/Wiki-wordmark.png') );
					
					msg.sendChannel( spoiler + '<' + pagelink + '>' + text + spoiler, {embed} );
					
					if ( reaction ) reaction.removeEmoji();
				}
				else got.get( wiki.toDescLink(querypage.title), {
					responseType: 'text'
				} ).then( descresponse => {
					var descbody = descresponse.body;
					if ( descresponse.statusCode !== 200 || !descbody ) {
						console.log( '- ' + descresponse.statusCode + ': Error while getting the description.' );
					} else {
						var thumbnail = wiki.toLink('Special:FilePath/Wiki-wordmark.png');
						var parser = new htmlparser.Parser( {
							onopentag: (tagname, attribs) => {
								if ( tagname === 'meta' && attribs.property === 'og:description' ) {
									var description = attribs.content.escapeFormatting();
									if ( description.length > 1000 ) description = description.substring(0, 1000) + '\u2026';
									embed.setDescription( description );
								}
								if ( tagname === 'meta' && attribs.property === 'og:image' && querypage.title !== body.query.general.mainpage ) {
									thumbnail = attribs.content;
								}
							}
						}, {decodeEntities:true} );
						parser.write( descbody );
						parser.end();
						if ( !querypage.imageinfo ) embed.setThumbnail( thumbnail );
					}
				}, error => {
					console.log( '- Error while getting the description: ' + error );
				} ).finally( () => {
					msg.sendChannel( spoiler + '<' + pagelink + '>' + text + spoiler, {embed} );
					
					if ( reaction ) reaction.removeEmoji();
				} );
			}
		}
		else if ( body.query.interwiki ) {
			if ( msg.channel.isGuild() && pause[msg.guild.id] ) {
				if ( reaction ) reaction.removeEmoji();
				console.log( '- Aborted, paused.' );
				return;
			}
			var iw = new URL(body.query.interwiki[0].url.replace( /\\/g, '%5C' ).replace( /@(here|everyone)/g, '%40$1' ), wiki);
			querystring.forEach( (value, name) => {
				iw.searchParams.append(name, value);
			} );
			if ( fragment ) iw.hash = Wiki.toSection(fragment);
			else fragment = iw.hash.substring(1);
			var maxselfcall = interwikiLimit[( msg?.guild?.id in patreons ? 'patreon' : 'default' )];
			if ( selfcall < maxselfcall && ['http:','https:'].includes( iw.protocol ) ) {
				selfcall++;
				if ( iw.hostname.endsWith( '.fandom.com' ) || iw.hostname.endsWith( '.wikia.org' ) ) {
					let regex = iw.pathname.match( /^(\/(?!wiki\/)[a-z-]{2,12})?(?:\/wiki\/|\/?$)/ );
					if ( regex ) {
						let path = ( regex[1] || '' );
						let iwtitle = decodeURIComponent( iw.pathname.replace( regex[0], '' ) ).replace( /_/g, ' ' );
						cmd = ( iw.hostname.endsWith( '.wikia.org' ) ? '??' : '?' ) + ( path ? path.substring(1) + '.' : '' ) + iw.hostname.replace( /\.(?:fandom\.com|wikia\.org)/, ' ' );
						return this.general(lang, msg, iwtitle, new Wiki(iw.origin + path + '/'), cmd, reaction, spoiler, iw.searchParams, fragment, iw.href, selfcall);
					}
				}
				if ( iw.hostname.endsWith( '.gamepedia.com' ) ) {
					let iwtitle = decodeURIComponent( iw.pathname.substring(1) ).replace( /_/g, ' ' );
					cmd = '!' + iw.hostname.replace( '.gamepedia.com', ' ' );
					if ( cmd !== '!www ' ) return this.general(lang, msg, iwtitle, new Wiki(iw.origin), cmd, reaction, spoiler, iw.searchParams, fragment, iw.href, selfcall);
				}
				let project = wikiProjects.find( project => iw.hostname.endsWith( project.name ) );
				if ( project ) {
					let regex = ( iw.host + iw.pathname ).match( new RegExp( '^' + project.regex + '(?:' + project.articlePath + '|/?$)' ) );
					if ( regex ) {
						let iwtitle = decodeURIComponent( ( iw.host + iw.pathname ).replace( regex[0], '' ) ).replace( /_/g, ' ' );
						cmd = '!!' + regex[1] + ' ';
						return this.general(lang, msg, iwtitle, new Wiki('https://' + regex[1] + project.scriptPath), cmd, reaction, spoiler, iw.searchParams, fragment, iw.href, selfcall);
					}
				}
			}
			msg.sendChannel( spoiler + ' ' + iw + ' ' + spoiler ).then( message => {
				if ( message && selfcall === maxselfcall ) message.reactEmoji('⚠️');
			} );
			if ( reaction ) reaction.removeEmoji();
		}
		else if ( body.query.redirects ) {
			var pagelink = wiki.toLink(body.query.redirects[0].to, querystring, ( fragment || body.query.redirects[0].tofragment || '' ));
			var embed = new MessageEmbed().setAuthor( body.query.general.sitename ).setTitle( body.query.redirects[0].to.escapeFormatting() ).setURL( pagelink ).setThumbnail( wiki.toLink('Special:FilePath/Wiki-wordmark.png') );
			
			msg.sendChannel( spoiler + '<' + pagelink + '>' + spoiler, {embed} );
			
			if ( reaction ) reaction.removeEmoji();;
		}
		else {
			var pagelink = wiki.toLink(body.query.general.mainpage, querystring, fragment);
			var embed = new MessageEmbed().setAuthor( body.query.general.sitename ).setTitle( body.query.general.mainpage.escapeFormatting() ).setURL( pagelink ).setThumbnail( wiki.toLink('Special:FilePath/Wiki-wordmark.png') );
			
			if ( body.query.allmessages[0]['*'] ) {
				embed.setDescription( body.query.allmessages[0]['*'] );
				
				msg.sendChannel( spoiler + '<' + pagelink + '>' + spoiler, {embed} );
				
				if ( reaction ) reaction.removeEmoji();
			}
			else got.get( wiki.toDescLink(body.query.general.mainpage), {
				responseType: 'text'
			} ).then( descresponse => {
				var descbody = descresponse.body;
				if ( descresponse.statusCode !== 200 || !descbody ) {
					console.log( '- ' + descresponse.statusCode + ': Error while getting the description.' );
				} else {
					var parser = new htmlparser.Parser( {
						onopentag: (tagname, attribs) => {
							if ( tagname === 'meta' && attribs.property === 'og:description' ) {
								var description = attribs.content.escapeFormatting();
								if ( description.length > 1000 ) description = description.substring(0, 1000) + '\u2026';
								embed.setDescription( description );
							}
						}
					}, {decodeEntities:true} );
					parser.write( descbody );
					parser.end();
				}
			}, error => {
				console.log( '- Error while getting the description: ' + error );
			} ).finally( () => {
				msg.sendChannel( spoiler + '<' + pagelink + '>' + spoiler, {embed} );
				
				if ( reaction ) reaction.removeEmoji();
			} );
		}
	}, error => {
		if ( interwiki ) msg.sendChannel( spoiler + ' ' + interwiki + ' ' + spoiler );
		else if ( wiki.noWiki(error.message) ) {
			console.log( '- This wiki doesn\'t exist!' );
			msg.reactEmoji('nowiki');
		}
		else {
			console.log( '- Error while getting the search results: ' + error );
			msg.sendChannelError( spoiler + '<' + wiki.toLink(( querystring.toString() || fragment || !title ? title : 'Special:Search' ), ( querystring.toString() || fragment || !title ? querystring : {search:title} ), fragment) + '>' + spoiler );
		}
		
		if ( reaction ) reaction.removeEmoji();
	} );
}

module.exports = fandom_check_wiki;