#!/usr/bin/env node
import assert from 'node:assert/strict';
import fs from 'node:fs';
import vm from 'node:vm';
const code = fs.readFileSync(new URL('../crates/qbz-qt/qml/assets/release-sort.js', import.meta.url), 'utf8');
const sort = vm.createContext({});
vm.runInContext(code.replace(/^\.pragma library\s*/, ''), sort);
const rows = [
  { id: 'souls', title: 'The Book of Souls', artist: 'Iron Maiden', year: 'Sep 4, 2015', releaseSortKey: 20150904 },
  { id: 'iron', title: 'Iron Maiden', artist: 'Iron Maiden', year: 'Apr 1, 1980', releaseSortKey: 19800401 },
  { id: 'senjutsu', title: 'Senjutsu', artist: 'Iron Maiden', year: 'Sep 3, 2021', releaseSortKey: 20210903 },
  { id: 'live', title: 'Live After Death', artist: 'Iron Maiden', year: 'Aug 1, 1985', releaseSortKey: 19850801 },
  { id: 'killers', title: 'Killers', artist: 'Iron Maiden', year: 'Feb 1, 1981', releaseSortKey: 19810201 },
];
const ids = items => Array.from(items, x => x.id);
const oldest = ['iron', 'killers', 'live', 'souls', 'senjutsu'];
for (const group of ['off', 'artist', 'year', 'decade']) {
  assert.deepEqual(ids(sort.sortAlbums(rows, 'oldest', group)), oldest);
  assert.deepEqual(ids(sort.sortAlbums(rows, 'newest', group)), oldest.slice().reverse());
}
assert.deepEqual(ids(sort.sortAlbums(rows, 'default', 'off')), ids(rows));
const localized = rows.map(x => ({...x, year: 'fecha visible localizada'}));
assert.deepEqual(ids(sort.sortAlbums(localized, 'oldest', 'off')), oldest);
for (const direction of ['oldest', 'newest']) {
  assert.equal(sort.sortAlbums([{id: 'unknown'}, ...rows], direction, 'off').at(-1).id, 'unknown');
}
assert.deepEqual(ids(sort.sortAlbums([
  {id:'later', releaseSortKey: 20210904}, {id:'earlier', releaseSortKey: 20210903},
], 'oldest', 'off')), ['earlier', 'later']);
assert.equal(sort.groupLabel(rows[1], 'year'), '1980');
assert.equal(sort.groupLabel(rows[1], 'decade'), '1980–1989');
assert.equal(sort.groupLabel({}, 'decade'), '#');
assert.deepEqual(ids(rows), ['souls', 'iron', 'senjutsu', 'live', 'killers']);
console.log('Release chronology, original-date keys, grouping and localized-label independence: passed');

// Execute ArtistView's actual comparator too, including Default after an
// arbitrary sort and after an appended Load more page.
const artistQml = fs.readFileSync(new URL('../crates/qbz-qt/qml/views/ArtistView.qml', import.meta.url), 'utf8');
const begin = artistQml.indexOf('function sortReleaseCards(');
let end = artistQml.indexOf('{', begin) + 1, depth = 1;
while (depth && end < artistQml.length) {
  if (artistQml[end] === '{') ++depth;
  if (artistQml[end] === '}') --depth;
  ++end;
}
assert.equal(depth, 0);
sort.ReleaseSort = sort;
vm.runInContext(artistQml.slice(begin, end), sort);
const ranked = rows.map((x, index) => ({...x, defaultOrder: index}));
assert.deepEqual(ids(sort.sortReleaseCards(ranked, 'oldest')), oldest);
const shuffled = sort.sortReleaseCards(ranked, 'newest');
assert.deepEqual(ids(sort.sortReleaseCards(shuffled, 'default')), ids(rows));
shuffled.push({id:'page2', defaultOrder:10, releaseSortKey:19700101});
assert.deepEqual(ids(sort.sortReleaseCards(sort.sortReleaseCards(shuffled, 'oldest'), 'default')),
  [...ids(rows), 'page2']);
const libraryQml = fs.readFileSync(new URL('../crates/qbz-qt/qml/views/LibraryView.qml', import.meta.url), 'utf8');
const dateGrouping = libraryQml.match(/readonly property bool dateGrouping:([\s\S]*?)readonly property bool alphaActive:/)[1].trim();
for (const activeTab of ['tracks', 'albums', 'artists']) {
  for (const albumsGroup of ['off', 'artist', 'alpha', 'year', 'decade']) {
    assert.equal(vm.runInNewContext(dateGrouping, {activeTab, albumsGroup}),
      activeTab === 'albums' && ['year', 'decade'].includes(albumsGroup));
  }
}
console.log('Artist Default restores server order across sorts/pages; date grouping does not affect track A-Z: passed');

// Run the Library feed parser and visible-items derivation, not just the sort
// helper: duplicate favorite/purchase rows must select the purchased row and
// retain its release date, while source switches remain independent per tab.
function qmlFunction(name) {
  const start = libraryQml.indexOf(`function ${name}(`);
  assert.ok(start >= 0, name);
  let stop = libraryQml.indexOf('{', start) + 1, level = 1;
  while (level && stop < libraryQml.length) {
    if (libraryQml[stop] === '{') ++level;
    if (libraryQml[stop] === '}') --level;
    ++stop;
  }
  assert.equal(level, 0, name);
  return libraryQml.slice(start, stop);
}
const bridge = {
  sessionShowPurchases: false, sessionShowFavorites: false, sessionShowFollowing: false,
  sessionAlbumsShowPurchases: false, sessionAlbumsShowFavorites: false,
  sessionTracksShowPurchases: false, sessionTracksShowFavorites: false,
  sessionAlbumsHiresOnly:false, sessionTracksHiresOnly:false, sessionHideLocalAlbums:false,
};
const lib = vm.createContext({
  QbzLibrary: bridge, ReleaseSort: sort, Qt: {callLater() {}},
  activeTab: 'all', search: '', tabSearch: '', showLocal: true,
  sortBy: 'date', sortAsc: false, albumsSort: 'oldest', albumsGroup: 'off',
  tracksGroup: 'off', artistsGroup: 'off', artistsView:'grid', genreNames: [],
  tracksSort:'default', playlistsSort:'default', artistsSort:'default', labelsSort:'default',
});
lib.root = lib;
for (const name of ['showPurchases', 'showFavorites', 'showFollowing', 'genreContext', 'hiresOnly', 'activeSort']) {
  const expr = libraryQml.match(new RegExp(`readonly property (?:bool|string) ${name}:([^\\n]*(?:\\n        [^\\n]*)*)`))[1];
  Object.defineProperty(lib, name, {get() { return vm.runInContext(expr, lib); }});
}
for (const name of ['alphaKey', 'pickSort', 'isLocalFeedItem', 'hideableLocalAlbum', 'parseFeed', 'visibleItems', 'matchesSources', 'setShowPurchases', 'setShowFavorites', 'setShowFollowing', 'setHiresOnly']) {
  vm.runInContext(qmlFunction(name), lib);
}
const libraryRows = [];
for (const kind of ['album', 'track']) {
  for (const [id, groups, date] of [
    ['both', ['favorites', 'purchases'], 20150904],
    ['purchased', ['purchases'], 20210903],
    ['favorite', ['favorites'], 19800401],
  ]) {
    for (const group of groups) libraryRows.push({id, kind, group, title:id,
      artist:'Iron Maiden', source:'qobuz', year:String(date), releaseSortKey:date});
  }
}
libraryRows.push({id:'followed', kind:'playlist', group:'following', source:'qobuz', title:'Followed'});
lib.feed = lib.parseFeed(JSON.stringify(libraryRows));
for (const tab of ['all', 'albums', 'tracks']) {
  lib.activeTab = tab;
  if (tab === 'all') lib.setShowFollowing(false);
  for (const [purchases, favorites, expected] of [
    [true, true, ['both']],
    [true, false, ['both','purchased']],
    [false, true, ['both','favorite']],
    [false, false, ['both','favorite','purchased']],
  ]) {
    lib.setShowPurchases(purchases); lib.setShowFavorites(favorites);
    const shown = lib.visibleItems().filter(x => x.kind === (tab === 'tracks' ? 'track' : 'album'));
    assert.deepEqual([...new Set(ids(shown))].sort(), expected, `${tab}: ${purchases}/${favorites}`);
    if (tab !== 'all') {
      assert.equal(shown.length, expected.length, 'No duplicated entities');
      assert.equal(shown.find(x => x.id === 'both').group, 'purchases');
    }
  }
}
lib.activeTab = 'albums'; lib.setShowPurchases(false); lib.setShowFavorites(false);
assert.deepEqual(ids(lib.visibleItems()), ['favorite', 'both', 'purchased']);
lib.albumsSort = 'newest';
assert.deepEqual(ids(lib.visibleItems()), ['purchased', 'both', 'favorite']);
// Navigation away and component recreation must read the singleton's own tab
// state, rather than copy whichever tab was last visible.
lib.activeTab = 'all'; lib.setShowPurchases(false); lib.setShowFavorites(true); lib.setShowFollowing(false);
lib.activeTab = 'albums'; lib.setShowPurchases(true); lib.setShowFavorites(false);
lib.activeTab = 'tracks'; lib.setShowPurchases(false); lib.setShowFavorites(false);
for (const [tab, expected] of [['all',[false,true]], ['albums',[true,false]], ['tracks',[false,false]]]) {
  lib.activeTab = tab;
  assert.deepEqual([lib.showPurchases, lib.showFavorites], expected);
  assert.equal(lib.genreContext, `library-${tab}`);
}
lib.activeTab = 'all'; lib.setShowPurchases(false); lib.setShowFavorites(false); lib.setShowFollowing(true);
assert.deepEqual(ids(lib.visibleItems()), ['followed']);
lib.activeTab = 'albums';
assert.deepEqual(ids(lib.visibleItems()), ['purchased', 'both'], 'Following cannot gate Albums');
console.log('Library only-filter intersections, per-tab state, purchase-row dates, deduplication and chronology: passed');

// Popularity leaves server order intact, and changing its paging order must
// discard the old overlay/cursor while a local date/title sort keeps them.
assert.deepEqual(ids(sort.sortReleaseCards(ranked, 'relevant')), ids(rows));
const changeStart = artistQml.indexOf('function releaseSortChanged(');
let changeEnd = artistQml.indexOf('{', changeStart) + 1, changeDepth = 1;
while (changeDepth && changeEnd < artistQml.length) {
  if (artistQml[changeEnd] === '{') ++changeDepth;
  if (artistQml[changeEnd] === '}') --changeDepth;
  ++changeEnd;
}
const artistState = vm.createContext({QbzArtist:{setSectionSort() {}}});
artistState.root = artistState;
vm.runInContext(artistQml.slice(changeStart, changeEnd), artistState);
for (const [from,to,reset] of [['default','relevant',true],['relevant','oldest',true],['oldest','newest',false]]) {
  artistState.artist = {releaseSections:[{releaseType:'album',sortBy:from}]};
  artistState.releaseFade = {};
  artistState.releaseOverlay = {album:{cards:[{id:'old-page'}],hasMore:false}};
  artistState.releaseCursor = {album:{next:40}};
  artistState.releasePending = {album:true};
  artistState.releaseSortChanged('album',to);
  assert.equal(artistState.releaseCursor.album === undefined, reset);
  assert.equal(artistState.releaseOverlay.album === undefined, reset);
  if (reset) assert.equal(artistState.releasePending.album, undefined);
}
console.log('Artist popularity preserves server rank and resets pagination across server-order changes: passed');

// Artists must remain independent of album/track source and genre switches.
// The #758 log contains 19 artists; it does not establish a rendering cause.
const artistRows = Array.from({length:19}, (_, i) => ({kind:'artist', id:`artist-${i}`,
  title:`Artist ${i}`, group:'favorites', source:'qobuz'}));
lib.feed = lib.parseFeed(JSON.stringify([...libraryRows, ...artistRows]));
lib.activeTab = 'artists';
lib.genreNames = ['genre absent from every artist'];
for (const group of ['off', 'alpha']) {
  lib.artistsGroup = group;
  for (const enabled of [false, true]) {
    bridge.sessionShowPurchases = enabled;
    bridge.sessionShowFavorites = enabled;
    bridge.sessionAlbumsShowPurchases = enabled;
    bridge.sessionTracksShowFavorites = enabled;
    assert.equal(lib.visibleItems().length, 19);
  }
}
lib.tabSearch = 'Artist 18';
assert.deepEqual(ids(lib.visibleItems()), ['artist-18']);
lib.tabSearch = '';
assert.equal(lib.visibleItems().length, 19);
console.log('Library Artists preserves all 19 rows independently of source/genre switches: passed');

// Each Hi-Res restriction combines with source restrictions in its own tab.
lib.genreNames = [];
lib.feed = lib.parseFeed(JSON.stringify(libraryRows.map(row => ({...row,
    qualityTier: row.id === 'both' ? 'hires' : 'cd'}))));
lib.activeTab = 'albums'; lib.setShowPurchases(false); lib.setShowFavorites(false);
lib.setHiresOnly(true);
assert.deepEqual(ids(lib.visibleItems()), ['both']);
lib.activeTab = 'tracks'; lib.setShowPurchases(false); lib.setShowFavorites(false);
assert.equal(lib.visibleItems().length, 3);
lib.setHiresOnly(true); lib.setShowFavorites(true);
assert.deepEqual(ids(lib.visibleItems()), ['both']);
lib.activeTab = 'all'; lib.setShowFollowing(false);
lib.setShowPurchases(false); lib.setShowFavorites(false);
lib.feed = lib.parseFeed(JSON.stringify([
  ...['local','plex','jellyfin','subsonic'].map(source => ({
    kind:'album',id:source+':album',source,group:'local'})),
  {kind:'track',id:'local-track',source:'local',group:'local'},
  {kind:'album',id:'online',source:'qobuz',group:'favorites'},
  {kind:'album',id:'matched-cache',source:'qobuz',group:'favorites',sources:['offline']},
  {kind:'album',id:'cache',source:'local',group:'local',sources:['offline']},
]));
lib.showLocal = false;
assert.deepEqual(ids(lib.visibleItems()).sort(), ['cache','local-track','matched-cache','online']);
lib.showLocal = true;
assert.equal(lib.visibleItems().length, 8);
const playlists = ['you','qobuz','others','unknown'].map((creator, i) => ({
  id:String(i), kind:'playlist', source:'qobuz', group:i ? 'following':'favorites',
  title:creator, playlistCreator:creator, isFavorite:i===2,
}));
lib.feed = lib.parseFeed(JSON.stringify([...playlists, {...playlists[2],group:'favorites'}]));
lib.activeTab = 'playlists';
for (const creator of ['all','you','qobuz','others']) {
  lib.playlistsSubTab = creator;
  assert.equal(lib.visibleItems().length, creator === 'all' ? 4 : 1);
  if (creator !== 'all') assert.equal(lib.visibleItems()[0].playlistCreator, creator);
}
assert.equal(lib.feed._tabTotals.playlists, 4);
console.log('Hi-Res intersections, per-tab isolation, local-album exclusion and playlist author select: passed');

// Catalog IDs and local row IDs live in different namespaces.
lib.feed = lib.parseFeed(JSON.stringify([
  {kind:'track',id:'7',source:'local',group:'local'},
  {kind:'track',id:'7',source:'qobuz',group:'purchases'},
]));
lib.activeTab = 'all'; lib.setShowPurchases(true); lib.setShowFavorites(false); lib.setShowFollowing(false);
assert.equal(lib.visibleItems().length, 1);
assert.equal(lib.visibleItems()[0].source, 'qobuz');

// Re-selecting one criterion flips it; other tabs retain their own choices.
lib.setPref = (key, value) => { lib[key] = value; };
for (const tab of ['all','tracks','albums','artists','labels','playlists']) {
  lib.activeTab = tab;
  lib.pickSort('title');
  assert.equal(lib.activeSort, 'title-asc');
  lib.pickSort('title');
  assert.equal(lib.activeSort, 'title-desc');
  lib.pickSort('date');
  assert.equal(lib.activeSort, 'date-desc');
  lib.pickSort('date');
  assert.equal(lib.activeSort, 'date-asc');
}
lib.activeTab='albums'; lib.albumsSort='oldest'; lib.pickSort('release-date');
assert.equal(lib.albumsSort,'release-date-desc');
lib.activeTab='tracks'; assert.equal(lib.tracksSort,'date-asc');
const sortRows = [
 {id:'b',title:'Bravo',artist:'B',album:'B',label:'B',genre:'Rock',releaseSortKey:20000101,durationSecs:200,trackCount:10,updatedAt:200,added_rank:0},
 {id:'a',title:'Alpha',artist:'A',album:'A',label:'A',genre:'Jazz',releaseSortKey:19800101,durationSecs:100,trackCount:0,updatedAt:100,added_rank:1},
 {id:'missing'}
];
for (const field of ['title','artist','release','label','genre','release-date','duration','track-count','updated']) {
 assert.deepEqual(ids(sort.sortRows(sortRows,field+'-asc')),['a','b','missing'],field);
 assert.deepEqual(ids(sort.sortRows(sortRows,field+'-desc')),['b','a','missing'],field);
}
assert.deepEqual(ids(sort.sortRows(sortRows.slice(0,2),'date-desc')),['b','a']);
assert.deepEqual(ids(sort.sortRows(sortRows.slice(0,2),'date-asc')),['a','b']);
assert.deepEqual(ids(sort.sortRows(sortRows,'default-reverse')),['missing','a','b']);
assert.deepEqual(ids(sortRows),['b','a','missing']);
console.log('All six tabs: one criterion, repeat-click reversal, independent state, numeric metadata, unknowns last: passed');

// Exercise tab derivation, so a grouping or old forced sort cannot override it.
lib.genreNames=[]; lib.tabSearch=''; lib.tracksGroup='off'; lib.artistsGroup='off';
bridge.sessionTracksHiresOnly=false; bridge.sessionAlbumsHiresOnly=false;
bridge.sessionTracksShowFavorites=false; bridge.sessionTracksShowPurchases=false;
bridge.sessionAlbumsShowFavorites=false; bridge.sessionAlbumsShowPurchases=false;
for (const [tab,kind] of [['tracks','track'],['albums','album'],['artists','artist'],['labels','label'],['playlists','playlist']]) {
 lib.activeTab=tab; lib.playlistsSubTab='all';
 lib.feed=lib.parseFeed(JSON.stringify(sortRows.map(row=>({...row,kind,source:'qobuz',group:'favorites'}))));
 lib[tab+'Sort']='title-asc'; assert.deepEqual(ids(lib.visibleItems()),['a','b','missing'],tab);
 lib[tab+'Sort']='title-desc'; assert.deepEqual(ids(lib.visibleItems()),['b','a','missing'],tab);
}
lib.activeTab='artists'; lib.artistsGroup='alpha'; lib.artistsView='sidepanel';
lib.artistsSort='date-desc';
lib.feed=lib.parseFeed(JSON.stringify(sortRows.slice(0,2).map(row=>({...row,kind:'artist',source:'qobuz',group:'favorites'}))));
assert.deepEqual(ids(lib.visibleItems()),['b','a'],'Sidepanel must not inherit grid grouping');
console.log('Every Library tab applies chosen order through the real visible-items pipeline: passed');

assert.deepEqual(ids(sort.sortRows([
 {id:'full',kind:'playlist',trackCount:2,durationSecs:200},
 {id:'empty',kind:'playlist',trackCount:0},
 {id:'unknown',kind:'playlist',trackCount:2}
], 'duration-asc')), ['empty','full','unknown']);

lib.activeTab='albums'; lib.albumsSort='title-asc';
lib.pickSort('default'); assert.equal(lib.albumsSort,'default');
assert.equal(sort.ascending(lib.activeSort),false);
lib.pickSort('default'); assert.equal(lib.albumsSort,'default-reverse');
assert.equal(sort.ascending(lib.activeSort),true);
lib.pickSort('default'); assert.equal(lib.albumsSort,'default');