// ==UserScript==
// @name         [RED] Import music release details from bandcamp
// @namespace    https://greasyfork.org/users/321857-anakunda
// @version      0.10.0
// @match        https://redacted.ch/upload.php
// @match        https://redacted.ch/torrents.php?id=*
// @match        https://redacted.ch/torrents.php?page=*&id=*
// @match        https://orpheus.network/upload.php
// @match        https://orpheus.network/torrents.php?id=*
// @match        https://orpheus.network/torrents.php?page=*&id=*
// @run-at       document-end
// @author       Anakunda
// @description  Lets find music release on Bandcamp and imports text description, artist credits, image and tags into existing release group.
// @copyright    2022, Anakunda (https://greasyfork.org/users/321857-anakunda)
// @license      GPL-3.0-or-later
// @connect      bandcamp.com
// @grant        GM_xmlhttpRequest
// @grant        GM_getValue
// @grant        GM_setValue
// @require      https://openuserjs.org/src/libs/Anakunda/xhrLib.min.js
// @require      https://openuserjs.org/src/libs/Anakunda/libLocks.min.js
// @require      https://openuserjs.org/src/libs/Anakunda/gazelleApiLib.min.js
// @require      https://openuserjs.org/src/libs/Anakunda/QobuzLib.min.js
// @require      https://openuserjs.org/src/libs/Anakunda/GazelleTagManager.min.js
// @downloadURL none
// ==/UserScript==

'use strict';

const imageHostHelper = (function() {
	const input = document.head.querySelector('meta[name="ImageHostHelper"]');
	return (input != null ? Promise.resolve(input) : new Promise(function(resolve, reject) {
		const mo = new MutationObserver(function(mutationsList, mo) {
			for (let mutation of mutationsList) for (let node of mutation.addedNodes) {
				if (node.nodeName != 'META' || node.name != 'ImageHostHelper') continue;
				clearTimeout(timer); mo.disconnect();
				return resolve(node);
			}
		}), timer = setTimeout(function(mo) {
			mo.disconnect();
			reject('Timeout reached');
		}, 15000, mo);
		mo.observe(document.head, { childList: true });
	})).then(function(node) {
		console.assert(node instanceof HTMLElement);
		const propName = node.getAttribute('propertyname');
		console.assert(propName);
		return unsafeWindow[propName] || Promise.reject(`Assertion failed: '${propName}' not in unsafeWindow`);
	});
})();

function fetchBandcampDetails(artists, album) {
	function tryQuery(query) {
		if (!query) throw 'Invalid qrgument';
		const url = new URL('https://bandcamp.com/search');
		url.searchParams.set('q', query);
		url.searchParams.set('item_type', 'a');
		return globalXHR(url).then(function({document}) {
			const results = document.body.querySelectorAll('div.search ul.result-items > li.searchresult');
			return results.length > 0 ? results : Promise.reject('Not found');
		});
	}

	if (album) album = [
		/\s+(?:EP|E\.\s?P\.|-\s+(?:EP|E\.\s?P\.))$/i,
		/\s+\((?:EP|E\.\s?P\.|Live)\)$/i, /\s+\[(?:EP|E\.\s?P\.|Live)\]$/i,
		/\s+\((?:feat\.|ft\.|featuring\s).+\)$/i, /\s+\[(?:feat\.|ft\.|featuring\s).+\]$/i,
	].reduce((title, rx) => title.replace(rx, ''), album.trim()); else throw 'Invalid argument';
	return (Array.isArray(artists) && artists.length > 0 ? tryQuery(artists.map(artist => '"' + artist + '"').join(' ') + ' "' + album + '"')
			: Promise.reject('No artist')).catch(reason => tryQuery('"' + album + '"')).then(searchResults => new Promise(function(resolve, reject) {
		console.assert(searchResults.length > 0);
		let selectedRow = null;
		const list = document.createElement('UL');
		for (let li of searchResults) {
			for (let a of li.getElementsByTagName('A')) a.onclick = evt => { if (!evt.ctrlKey && !evt.shiftKey) return false };
			for (let styleSheet of [
				['.searchresult .art img', 'max-height: 145px; max-width: 145px;'],
				['.result-info', 'display: inline-block; color: #595959; vertical-align: top; width: 475px; margin-left: 1.3em; line-height: 1.4em;'],
				['.itemtype', 'font-size: 10px; color: #999; margin-bottom: 0.5em;'],
				['.heading', 'font-size: 16px; margin-bottom: 0.1em;'],
				['.subhead', 'font-size: 13px; margin-bottom: 0.3em;'],
				['.released', 'font-size: 11px;'],
				['.itemurl', 'color: #999; font-size: 11px;'],
				['.itemurl a', 'color: #84c67d;'],
				['.tags', 'color: #999; font-size: 11px;'],
			]) for (let elem of li.querySelectorAll(styleSheet[0])) elem.style = styleSheet[1];
			li.style = 'cursor: pointer; margin: 0; padding: 8px;';
			for (let child of li.children) child.style.display = 'inline-block';
			li.children[1].removeChild(li.children[1].children[0]);
			li.onclick = function(evt) {
				if (selectedRow != null) selectedRow.style.backgroundColor = null;
				(selectedRow = evt.currentTarget).style.backgroundColor = 'cornsilk';
				buttons[0].disabled = false;
			};
			list.append(li);
		}
		list.style = 'width: 665px; max-height: 70vw; background-color: white; padding: 5px; overflow-y: auto; overscroll-behavior-y: none; scrollbar-gutter: stable; scroll-behavior: auto; margin-bottom: 10pt; list-style-type: none; box-shadow: 1px 1px 5px #555 inset;';
		const dialog = document.createElement('DIALOG');
		dialog.innerHTML = `
<form id="bandcamp-search-results" method="dialog">
	<input value="Import details" type="button" disabled><input value="Cancel" type="button" style="margin-left: 5pt;">
</form>`;
		dialog.style = 'padding: 1rem; position: fixed; top: 5%; left: 0; right: 0; margin-left: auto; margin-right: auto; background-color: lightgray; z-index: 9999;';
		dialog.onclose = evt => { document.body.removeChild(evt.currentTarget) };
		const form = dialog.querySelector('form#bandcamp-search-results');
		form.prepend(list);
		const buttons = dialog.querySelectorAll('input[type="button"]');
		buttons[0].onclick = function(evt) {
			console.assert(selectedRow instanceof HTMLTableRowElement);
			evt.currentTarget.disabled = true;
			const a = selectedRow.querySelector('div.result-info > div.heading > a');
			if (a != null) globalXHR(a.href.replace(/\?.*$/, '')).then(function({document}) {
				const details = {
					tags: new TagManager(...Array.from(document.querySelectorAll('div.tralbumData.tralbum-tags > a.tag'), a => a.textContent.trim())),
				};
				let elem = document.querySelector('div#tralbumArt > a.popupImage');
				if (elem != null) details.image = elem.href;
				else if ((elem = document.head.querySelector('meta[property="og:image"]')) != null) details.image = elem.content;
				if (details.image) details.image = details.image.replace(/_\d+(?=\.\w+$)/, '_10');
				if ((elem = document.head.querySelector('script[data-tralbum]')) == null) throw 'tralbum data not found';
				const tralbum = JSON.parse(elem.dataset.tralbum);
				if (typeof tralbum != 'object') throw 'invalid tralbum format';
				if (Array.isArray(tralbum.packages) && tralbum.packages.length > 0) for (let key in tralbum.packages[0])
					if (!tralbum.current[key] && tralbum.packages.every(pkg => pkg[key] == tralbum.packages[0][key]))
						tralbum.current[key] = tralbum.packages[0][key];
				if (tralbum.current.minimum_price <= 0) details.tags.add('freely.available');
				if (tralbum.url) details.url = tralbum.url;
				if (tralbum.current.about) details.description = tralbum.current.about.replace(/\r\n/g, '\n');
				if (tralbum.current.credits) details.credits = tralbum.current.credits.replace(/\r\n/g, '\n');
				resolve(details);
			}, reject); else reject('Link to album could not be found');
			dialog.close();
		};
		buttons[1].onclick = function(evt) {
			reject('Cancelled');
			dialog.close();
		};
		document.body.append(dialog);
		dialog.showModal();
	}));
}

switch (document.location.pathname) {
	case '/torrents.php': {
		if (document.querySelector('div.sidebar > div.box_artists') == null) break; // Nothing to do here - not music torrent
		//if (!ajaxApiKey) throw 'AJAX API key not configured';
		const urlParams = new URLSearchParams(document.location.search), groupId = parseInt(urlParams.get('id'));
		if (!(groupId > 0)) throw 'Invalid group id';
		const linkBox = document.body.querySelector('div.header > div.linkbox');
		if (linkBox == null) throw 'LinkBox not found';
		const a = document.createElement('A');
		a.textContent = 'Bandcamp import';
		a.href = '#';
		a.title = 'Import album textual description, tags and cover image from Bandcamp release page';
		a.className = 'brackets';
		a.onclick = function(evt) {
			if (!this.disabled) this.disabled = true; else return false;
			this.style.color = 'orange';
			queryAjaxAPI('torrentgroup', { id: groupId }).then(torrentGroup =>
					fetchBandcampDetails(torrentGroup.group.releaseType != 6 ?
						torrentGroup.group.musicInfo.artists.map(artist => artist.name).slice(0, 3) : null, torrentGroup.group.name)
							.then(function(details) {
				const updateWorkers = [ ];
				updateWorkers.push(localXHR('/torrents.php?' + new URLSearchParams({
					action: 'editgroup',
					groupid: torrentGroup.group.id,
				})).then(function(document) {
					const form = document.querySelector('form.edit_form');
					if (form == null) throw 'Edit form not found';
					const rehostWorker = (details.image ? imageHostHelper.then(ihh => ihh.rehostImageLinks([details.image])
						.then(ihh.singleImageGetter)).catch(reason => details.image) : Promise.resolve(null));
					let image = form.elements.namedItem('image').value, body = form.elements.namedItem('body').value.trim();
					if (details.description && !body.includes(details.description)) {
						if (body.length <= 0) body = '[quote]' + details.description + '[/quote]';
						else if (/^\[pad=\d+\|\d+\]/i.test(body))
							body = RegExp.leftContext + RegExp.lastMatch + '[quote]' + details.description + '[/quote]\n' + RegExp.rightContext;
						else body += '\n\n[quote]' + details.description + '[/quote]';
					}
					if (details.credits && !body.includes(details.credits)) {
						const credits = '[hide=Credits]' + details.credits + '[/hide]';
						if (body.length <= 0) body = credits;
						else if (/\[\/size\]\[\/pad\]$/i.test(body))
							body = RegExp.leftContext + '\n\n' + credits + RegExp.lastMatch + RegExp.rightContext;
						else body += '\n\n' + credits;
					}
					if (details.url && !body.includes(details.url)) {
						const url = '[url=' + details.url + ']Bandcamp[/url]';
						if (body.length <= 0) body = url;
						else if (/\[\/size\]\[\/pad\]$/i.test(body))
							body = RegExp.leftContext + '\n\n' + url + RegExp.lastMatch + RegExp.rightContext;
						else body += '\n\n' + url;
					}
					return rehostWorker.then(function(rehostedImageUrl) {
						if (rehostedImageUrl != null && rehostedImageUrl != image || body != form.elements.namedItem('body').value.trim()) {
							const formData = new FormData;
							formData.set('action', 'takegroupedit');
							formData.set('auth', form.elements.namedItem('auth').value);
							formData.set('groupid', form.elements.namedItem('groupid').value);
							formData.set('image', rehostedImageUrl || image);
							formData.set('body', body);
							formData.set('groupeditnotes', form.elements.namedItem('groupeditnotes').value);
							formData.set('releasetype', form.elements.namedItem('releasetype').value);
							formData.set('summary', 'Image/description update from Bandcamp');
							return localXHR('/torrents.php', { responseType: null }, formData).then(response => true, reason => reason);
						} else return 'No changes made';
					});
				}));
				if (details.tags instanceof TagManager) {
					let userAuth = document.body.querySelector('input[name="auth"][value]');
					if (userAuth != null) {
						userAuth = userAuth.value;
						let tags = Array.from(document.body.querySelectorAll('div.box_tags ul > li'), function(li) {
							const tag = { name: li.querySelector(':scope > a'), id: li.querySelector('span.remove_tag > a') };
							if (tag.name != null) tag.name = tag.name.textContent.trim();
							if (tag.id != null) tag.id = parseInt(new URLSearchParams(tag.id.search).get('tagid'));
							return tag.name && tag.id ? tag : null;
						}).filter(Boolean);
						const addTags = Array.from(details.tags).filter(tag => !tags.map(tag => tag.name).includes(tag));
						if (addTags.length > 0) updateWorkers.push(localXHR('/torrents.php', { responseType: null }, new URLSearchParams({
							action: 'add_tag',
							groupid: torrentGroup.group.id,
							tagname: addTags.join(', '),
							auth: userAuth,
						})).then(response => true, reason => reason));
						const deleteTags = tags.filter(tag => !details.tags.includes(tag.name));
						if (deleteTags.length > 0) Array.prototype.push.apply(updateWorkers, deleteTags.map(tag => localXHR('/torrents.php?' + new URLSearchParams({
							action: 'delete_tag',
							groupid: torrentGroup.group.id,
							tagid: tag.id,
							auth: userAuth,
						}), { responseType: null }).then(response => true, reason => reason)));
					}
				}
				// Update by API is broken
				// if (details.image) updateWorkers.push(imageHostHelper.then(ihh => ihh.rehostImageLinks([details.image])
				// 		.then(ihh.singleImageGetter)).catch(reason => details.image).then(function(imageUrl) {
				// 	if (imageUrl == torrentGroup.group.wikiImage) return false;
				// 	return queryAjaxAPI('groupedit', { id: torrentGroup.group.id }, {
				// 		image: imageUrl,
				// 		summary: 'Cover update from Bandcamp',
				// 	}).then(response => true, reason => reason);
				// }));
				// const ta = document.createElement('TEXTAREA');
				// ta.innerHTML = torrentGroup.group.bbBody;
				// let body = ta.textContent.trim();
				// if (details.description && !body.includes(details.description)) {
				// 	if (body.length <= 0) body = '[quote]' + details.description + '[/quote]';
				// 	else if (/^\[pad=\d+\|\d+\]/i.test(body))
				// 		body = RegExp.leftContext + RegExp.lastMatch + '[quote]' + details.description + '[/quote]\n' + RegExp.rightContext;
				// 	else body += '\n\n[quote]' + details.description + '[/quote]';
				// }
				// if (details.credits && !body.includes(details.credits)) {
				// 	const credits = '[hide=Credits]' + details.credits + '[/hide]';
				// 	if (body.length <= 0) body = credits;
				// 	else if (/\[\/size\]\[\/pad\]$/i.test(body))
				// 		body = RegExp.leftContext + '\n\n' + credits + RegExp.lastMatch + RegExp.rightContext;
				// 	else body += '\n\n' + credits;
				// }
				// if (details.url && !body.includes(details.url)) {
				// 	const url = '[url=' + details.url + ']Bandcamp[/url]';
				// 	if (body.length <= 0) body = url;
				// 	else if (/\[\/size\]\[\/pad\]$/i.test(body))
				// 		body = RegExp.leftContext + '\n\n' + url + RegExp.lastMatch + RegExp.rightContext;
				// 	else body += '\n\n' + url;
				// }
				// if (body != ta.textContent) {
				// 	const formData = new FormData;
				// 	formData.set('body', body);
				// 	formData.set('summary', 'Description update from Bandcamp');
				// 	updateWorkers.push(queryAjaxAPI('groupedit', { id: groupId }, formData).then(response => true, reason => reason));
				// }
				if (updateWorkers.length > 0) return Promise.all(updateWorkers).then(function(results) {
					if (results.filter(result => result === true).length > 0) document.location.reload();
						else return Promise.reject(`All of ${results.length} update workers failed (see browser console for more details)`);
				});
			})).catch(reason => { if (!['Cancelled'].includes(reason)) alert(reason) }).then(() => {
				this.style.color = null;
				this.disabled = false;
			});
			return false;
		};
		linkBox.append(' ', a);
		break;
	}
	case '/upload.php': {
		function hasStyleSheet(name) {
			if (name) name = name.toLowerCase(); else throw 'Invalid argument';
			const hrefRx = new RegExp('\\/' + name + '\\b', 'i');
			if (document.styleSheets) for (let styleSheet of document.styleSheets)
				if (styleSheet.title && styleSheet.title.toLowerCase() == name) return true;
					else if (styleSheet.href && hrefRx.test(styleSheet.href)) return true;
			return false;
		}

		const checkFields = function() {
			const visible = ['0', 'Music'].includes(categories.value) && title.textLength > 0;
			if (div.hidden != !visible) div.hidden = !visible;
		};
		const categories = document.getElementById('categories');
		if (categories == null) throw 'Categories select not found';
		let title = document.getElementById('title');
		if (title != null) title.addEventListener('input', checkFields); else throw 'Title select not found';
		const dynaForm = document.getElementById('dynamic_form');
		if (dynaForm != null) new MutationObserver(function(ml, mo) {
			for (let mutation of ml) if (mutation.addedNodes.length > 0) {
				if (title != null) title.removeEventListener('input', checkFields);
				if ((title = document.getElementById('title')) != null) title.addEventListener('input', checkFields);
					else throw 'Assertion failed: title input not found!';
				div.hidden = true;
			}
		}).observe(dynaForm, { childList: true });
		const isLightTheme = ['postmod', 'shiro', 'layer_cake', 'proton', 'red_light', '2iUn3'].some(hasStyleSheet);
		if (isLightTheme) console.log('Light Gazelle theme detected');
		const isDarkTheme = ['kuro', 'minimal', 'red_dark', 'Vinyl'].some(hasStyleSheet);
		if (isDarkTheme) console.log('Dark Gazelle theme detected');
		const div = document.createElement('DIV');
		div.style = 'position: fixed; top: 64pt; right: 10pt; padding: 5pt; border-radius: 50%; z-index: 999;';
		div.style.backgroundColor = `#${isDarkTheme ? '2f4f4f' : 'b8860b'}80`;
		const bcButton = document.createElement('BUTTON'), img = document.createElement('IMG');
		bcButton.id = 'import-from-bandcamp';
		bcButton.style = `
padding: 10px; color: white; background-color: white; cursor: pointer;
border: none; border-radius: 50%; transition: background-color 200ms;
`;
		bcButton.dataset.backgroundColor = bcButton.style.backgroundColor;
		bcButton.setDisabled = function(disabled = true) {
			this.disabled = disabled;
			this.style.opacity = disabled ? 0.5 : 1;
			this.style.cursor = disabled ? 'not-allowed' : 'pointer';
		};
		bcButton.onclick = function(evt) {
			this.setDisabled(true);
			this.style.backgroundColor = 'red';
			const artists = Array.from(document.body.querySelectorAll('tr#artist_tr input[name="artists[]"]'), function(input) {
				const artist = input.value.trim();
				return input.nextElementSibling.value == 1 && artist;
			}).filter(Boolean);
			const releaseType = document.getElementById('releasetype');

			fetchBandcampDetails(releaseType == null || releaseType.value != 7 ? artists.slice(0, 3) : [ ], title.value.trim()).then(function(details) {
				const tags = document.getElementById('tags'),
							image = document.getElementById('image'),
							description = document.getElementById('album_desc');
				if (tags != null && details.tags instanceof TagManager) tags.value = details.tags.toString();
				if (image != null && details.image) {
					image.value = details.image;
					imageHostHelper.then(function(ihh) {
						ihh.rehostImageLinks([details.image]).then(ihh.singleImageGetter).then(rehostedUrl => { image.value = rehostedUrl });
					});
				}
				if (description != null) {
					let body = description.value.trim();
					if (details.description && !body.includes(details.description)) {
						if (body.length <= 0) body = '[quote]' + details.description + '[/quote]';
						else if (/^\[pad=\d+\|\d+\]/i.test(body))
							body = RegExp.leftContext + RegExp.lastMatch + '[quote]' + details.description + '[/quote]\n' + RegExp.rightContext;
						else body += '\n\n[quote]' + details.description + '[/quote]';
					}
					if (details.credits && !body.includes(details.credits)) {
						const credits = '[hide=Credits]' + details.credits + '[/hide]';
						if (body.length <= 0) body = credits;
						else if (/\[\/size\]\[\/pad\]$/i.test(body))
							body = RegExp.leftContext + '\n\n' + credits + RegExp.lastMatch + RegExp.rightContext;
						else body += '\n\n' + credits;
					}
					if (details.url && !body.includes(details.url)) {
						const url = '[url=' + details.url + ']Bandcamp[/url]';
						if (body.length <= 0) body = url;
						else if (/\[\/size\]\[\/pad\]$/i.test(body))
							body = RegExp.leftContext + '\n\n' + url + RegExp.lastMatch + RegExp.rightContext;
						else body += '\n\n' + url;
					}
					description.value = body;
				}
			}, reason => { if (!['Cancelled'].includes(reason)) alert(reason) }).then(() => {
				this.style.backgroundColor = this.dataset.backgroundColor;
				this.setDisabled(false);
			});
		};
		bcButton.onmouseenter = bcButton.onmouseleave = function(evt) {
			if (evt.relatedTarget == evt.currentTarget || evt.currentTarget.disabled) return false;
			evt.currentTarget.style.backgroundColor = evt.type == 'mouseenter' ? 'orange'
				: evt.currentTarget.dataset.backgroundColor || null;
		};
		bcButton.title = 'Import description, cover image and tags from Bandcamp';
		img.src = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIAAAACACAMAAAD04JH5AAAAbFBMVEX////3///v///v9//m9//m9/fe9/fe7/fW7/fO7/fF7/fF5ve95u+15u+13u+t3u+l3u+l3uac1uaU1uaM1uaMzuaEzt57zt57xd5zxd5rxd5jvdZavdZSvdZStdZKtdZKtc5Ctc5Crc4ZpcWSSeq2AAAAAXRSTlMAQObYZgAAAAlwSFlzAAALEgAACxIB0t1+/AAAAoBJREFUeJzt2mtvgjAUBuCC93sUdR/2/3/bsqlbNqfzVpgGExXa02N5ZVly+gVBpU+a0retVtUfl6oABCAAAQhAAAIQgAAEIAABCEAAArjjs60oUSpI0pNCx/jFBxA8Ve7QkmV9eXkHYAKrX7/5ACptVP3xSvsAprAGSGZXJ2xAo4GqX39dn7EBY1gDqHcfQKuGql5/3JxyAZPw/CIJCh7Vpw+gG56/r4oe4/ntnZkAXA+Iv30AA1T1Si8yF3iAIawBDisfwAhVvdLz7BUWoA9rgN3GBzBBVa/0LHeJAQg6pwYo/Pyfjpu9DyCdBiDGAf2av7sbUGu6jbyiV4kPADcPUfkewAA066jqb2OYDXhUDHMBndDxAXbJxDAXEMHmAZkYZgK6IeT5P5ZDNoV4gEsPKDoOJJkY5gFwMbw3PYJuAC6G9Y8P4JExzALgYni79QFMA+LNu8r1YpAPqLRhg9BaW98iAGkKIcYBwzyEATjHMGAeEC8NMewGAFfDlkGQBjRxQ4A5BFyAMS6FzDHoAHRg22faOA1wAiLcYtA4EXIB+rh5CN0ANsCogpoHaEsM04AhZh2gqBQiAQNYD9jbYpgERKjqyUGYAPRwMbzzAZQSwwQAF8MxEcMEAJhC7gYwAOrpnixgHNBLBjIPOK+GEeMAFcNWAHBPloxhKwCXQnQM2wDdsmLYBhiVFcMWAC6G95wemAcAGyC7J8sCDEH7gcRqmAYcYxg1D7AuBilAVGYKmQA9WBc07MkyAMAY5vaAG0C5MWwAlBvDecCjfhplA57THgAYB0JeCmQBC9iutGspYAGw0htf/tV/SAQgAAEIQAACEIAABCAAAQhAAAJ4SPkFdtLUKHgfCmoAAAAASUVORK5CYII=' // https://s4.bcbits.com/img/favicon/apple-touch-icon.png
		img.width = 32;
		bcButton.append(img);
		div.append(bcButton);
		checkFields();
		document.body.append(div);
		break;
	}
}