/**
 * What a song keeps to itself (#355): an asset with the song as its owner, left out of every list,
 * shared by the places of the song (#357). A paste from another song gives it a copy of its own;
 * what nothing names goes in the same step, and comes back with an undo.
 */
import { describe, expect, it } from 'vitest';
import {
  CreateAssetCommand,
  CreateSoundCommand,
  DeleteAssetCommand,
  DuplicateAssetCommand,
  MakeProjectAssetCommand,
  ResetAssetPropertyCommand,
  SetAssetPropertyCommand,
} from '../../src/core/commands/assetCommands';
import { nextAssetName } from '../../src/core/commands/naming';
import { SetSongCommand } from '../../src/core/commands/songCommands';
import type { Asset, PatternAsset, SongAsset } from '../../src/core/model/Asset';
import { findAsset, findAssetOf } from '../../src/core/model/Project';
import {
  assetTitle,
  embeddedCopy,
  embeddedIn,
  embeddedName,
  embeddedUsedBy,
  instrumentNear,
  isRowHiddenWhenEmbedded,
  listedAssets,
  songClockProps,
} from '../../src/core/music/embedded';
import { patternLength, patternMeter, patternTempo } from '../../src/core/music/pattern';
import { newItem, type SongItem, songSequence } from '../../src/core/music/song';
import { assetRefChoices } from '../../src/core/properties/assetRef';
import { deserializeProject, serializeProject } from '../../src/core/store/serialize';
import { makeProject } from '../helpers';

const FILE = `${'c4'.repeat(32)}.wav`;
const BAR = 1920;

/** A song "Theme" with a take of its own on an item, and a project sound "Blip". */
function setup() {
  const f = makeProject();
  const made = new CreateAssetCommand('song', 'Theme');
  f.stack.execute(made);
  const songId = made.asset.id;
  const song = () => findAssetOf(f.project, songId, 'song')!;
  const blip = new CreateSoundCommand('Blip', FILE);
  f.stack.execute(blip);
  const take = new CreateSoundCommand('Take 1', FILE, songId);
  f.stack.execute(take);
  const track = song().tracks[0]!.id;
  const item = newItem({ track, kind: 'sound', asset: take.asset.id, tick: 0, length: 2 * BAR });
  f.stack.execute(new SetSongCommand(songId, { items: [item] }));
  const edit = (items: SongItem[], extra: { spare?: Asset[] } = {}) =>
    f.stack.execute(new SetSongCommand(songId, { items, ...extra }));
  return { f, songId, song, track, blipId: blip.asset.id, takeId: take.asset.id, itemId: item.id, edit };
}

const ids = (assets: readonly Asset[]) => assets.map((a) => a.id);

describe('an embedded asset (#355)', () => {
  it('is found by its id but left out of every list and of the names', () => {
    const { f, songId, takeId, blipId, song } = setup();
    expect(findAsset(f.project, takeId)?.owner).toBe(songId);
    expect(ids(listedAssets(f.project))).not.toContain(takeId);
    expect(ids(assetRefChoices(f.project, ['sound']))).toEqual([blipId]);
    expect(nextAssetName(f.project, 'Take 1')).toBe('Take 1');
    expect(songSequence(f.project, song()).clips?.map((c) => c.sound)).toEqual([takeId]);
    expect(assetTitle(f.project, findAsset(f.project, takeId)!)).toBe('Theme › Take 1');
  });

  it('hides the rows that do nothing in a song, only while embedded', () => {
    const { f, takeId, blipId } = setup();
    const take = findAsset(f.project, takeId)!;
    expect(['loop', 'bus', 'reverse', 'fx'].map((k) => isRowHiddenWhenEmbedded(take, k))).toEqual([
      true,
      true,
      false,
      false,
    ]);
    expect(isRowHiddenWhenEmbedded(findAsset(f.project, blipId)!, 'loop')).toBe(false);
  });

  it('is shared by both halves of a split (#357), and stays until the last place lets go', () => {
    const { f, song, takeId, edit } = setup();
    const before = f.project.assets.length;
    const left = song().items[0]!;
    edit([
      { ...left, length: BAR },
      { ...left, id: 'right', tick: BAR, length: BAR },
    ]);
    expect(song().items.map((i) => i.asset)).toEqual([takeId, takeId]);
    expect(f.project.assets.length).toBe(before);
    edit([song().items[1]!]);
    expect(findAsset(f.project, takeId)?.owner).toBe(song().id);
    edit([]);
    expect(findAsset(f.project, takeId)).toBeUndefined();
    f.stack.undo();
    expect(embeddedIn(f.project, song().id).map((x) => x.id)).toEqual([takeId]);
  });

  it('is shared by the song, its tracks and its items, whichever kind (#357)', () => {
    const { f, song, songId, track, edit } = setup();
    const fx = new CreateAssetCommand('soundfx', 'Sound FX 1', {}, songId);
    const pattern = new CreateAssetCommand('pattern', 'Pattern 1', {}, songId);
    f.stack.execute(fx);
    f.stack.execute(pattern);
    const tracks = song().tracks.map((t) => ({ ...t, fx: fx.asset.id }));
    const played = { track, kind: 'pattern' as const, asset: pattern.asset.id, length: BAR };
    const items = [0, BAR].map((tick) => ({ ...newItem({ ...played, tick }), fx: fx.asset.id }));
    f.stack.execute(new SetSongCommand(songId, { tracks, items }));
    f.stack.execute(new SetAssetPropertyCommand(songId, 'fx', fx.asset.id));
    expect(song().items.map((i) => [i.asset, i.fx])).toEqual([
      [pattern.asset.id, fx.asset.id],
      [pattern.asset.id, fx.asset.id],
    ]);
    expect(song().tracks[0]!.fx).toBe(fx.asset.id);
    expect(
      embeddedIn(f.project, songId)
        .map((a) => a.type)
        .sort(),
    ).toEqual(['pattern', 'soundfx']);
    f.stack.execute(new SetAssetPropertyCommand(songId, 'fx', ''));
    edit(song().items.map((i) => ({ ...i, fx: '' })));
    expect(findAsset(f.project, fx.asset.id)?.owner).toBe(songId);
    f.stack.execute(new SetSongCommand(songId, { tracks: song().tracks.map((t) => ({ ...t, fx: '' })) }));
    expect(findAsset(f.project, fx.asset.id)).toBeUndefined();
  });

  it('goes with the item that names it, and comes back on undo where it was', () => {
    const { f, songId, takeId, edit } = setup();
    const at = f.project.assets.findIndex((a) => a.id === takeId);
    edit([]);
    expect(findAsset(f.project, takeId)).toBeUndefined();
    f.stack.undo();
    expect(f.project.assets.findIndex((a) => a.id === takeId)).toBe(at);
    expect(findAsset(f.project, takeId)?.owner).toBe(songId);
  });

  it('comes back from what was copied along when a paste names it after it went', () => {
    const { f, song, takeId, edit } = setup();
    const copied = song().items.map((i) => ({ ...i }));
    const spare = structuredClone(embeddedUsedBy(f.project, copied));
    expect(ids(spare)).toEqual([takeId]);
    edit([]);
    edit(
      copied.map((i) => ({ ...i, id: 'pasted' })),
      { spare },
    );
    expect(song().items[0]!.asset).toBe(takeId);
    expect(findAsset(f.project, takeId)?.owner).toBe(song().id);
  });

  it('is copied for a song that names one of another song', () => {
    const { f, song, takeId } = setup();
    const other = new CreateAssetCommand('song', 'Other');
    f.stack.execute(other);
    const otherSong = other.asset as SongAsset;
    const item = newItem({
      track: otherSong.tracks[0]!.id,
      kind: 'sound',
      asset: takeId,
      tick: 0,
      length: BAR,
    });
    f.stack.execute(new SetSongCommand(otherSong.id, { items: [item] }));
    const named = findAssetOf(f.project, otherSong.id, 'song')!.items[0]!.asset;
    expect(named).not.toBe(takeId);
    expect(findAsset(f.project, named)?.owner).toBe(otherSong.id);
    expect(findAsset(f.project, takeId)?.owner).toBe(song().id);
  });

  it('is copied once for all the items of another song that name it (#357)', () => {
    const { f, takeId } = setup();
    const other = new CreateAssetCommand('song', 'Other');
    f.stack.execute(other);
    const otherSong = other.asset as SongAsset;
    const track = otherSong.tracks[0]!.id;
    const pasted = [0, BAR].map((tick) =>
      newItem({ track, kind: 'sound', asset: takeId, tick, length: BAR }),
    );
    f.stack.execute(new SetSongCommand(otherSong.id, { items: pasted }));
    const named = findAssetOf(f.project, otherSong.id, 'song')!.items.map((i) => i.asset);
    expect(named[0]).not.toBe(takeId);
    expect(named[1]).toBe(named[0]);
    expect(embeddedIn(f.project, otherSong.id).map((a) => a.id)).toEqual([named[0]]);
  });

  it('leaves a project asset named by several items alone', () => {
    const { f, song, blipId, edit, track } = setup();
    const before = f.project.assets.length;
    edit([
      newItem({ track, kind: 'sound', asset: blipId, tick: 0, length: BAR }),
      newItem({ track, kind: 'sound', asset: blipId, tick: BAR, length: BAR }),
    ]);
    expect(song().items.map((i) => i.asset)).toEqual([blipId, blipId]);
    expect(f.project.assets.length).toBe(before - 1);
  });

  it('is embedded as a copy of a project asset, which stays', () => {
    const { f, song, blipId, edit, track } = setup();
    const { copy } = embeddedCopy(findAsset(f.project, blipId)!, song());
    edit([newItem({ track, kind: 'sound', asset: copy.id, tick: 0, length: BAR })], { spare: [copy] });
    expect(song().items[0]!.asset).toBe(copy.id);
    expect(findAsset(f.project, copy.id)?.owner).toBe(song().id);
    expect(findAsset(f.project, blipId)?.owner).toBeUndefined();
  });

  it('goes with its song, and comes back with it', () => {
    const { f, songId, takeId } = setup();
    f.stack.execute(new DeleteAssetCommand(songId));
    expect(findAsset(f.project, takeId)).toBeUndefined();
    f.stack.undo();
    expect(findAsset(f.project, takeId)?.owner).toBe(songId);
    expect(findAsset(f.project, songId)).toBeDefined();
  });

  it('is copied for a duplicate of its song, which names the copy', () => {
    const { f, songId, takeId } = setup();
    const dup = new DuplicateAssetCommand(songId);
    f.stack.execute(dup);
    const copy = findAssetOf(f.project, dup.copyId, 'song')!;
    const named = copy.items[0]!.asset;
    expect(named).not.toBe(takeId);
    expect(findAsset(f.project, named)?.owner).toBe(copy.id);
    expect(embeddedIn(f.project, songId).map((a) => a.id)).toEqual([takeId]);
    f.stack.undo();
    expect(findAsset(f.project, named)).toBeUndefined();
  });

  it('becomes a project asset of a free name, and back on undo', () => {
    const { f, songId, takeId } = setup();
    f.stack.execute(new CreateSoundCommand('Take 1', FILE));
    f.stack.execute(new MakeProjectAssetCommand(takeId));
    const take = findAsset(f.project, takeId)!;
    expect([take.owner, take.name]).toEqual([undefined, 'Take 1 2']);
    expect(ids(listedAssets(f.project))).toContain(takeId);
    f.stack.undo();
    expect([take.owner, take.name]).toEqual([songId, 'Take 1']);
  });

  it('a duplicate of it is a project asset', () => {
    const { f, takeId } = setup();
    const dup = new DuplicateAssetCommand(takeId);
    f.stack.execute(dup);
    expect(findAsset(f.project, dup.copyId)?.owner).toBeUndefined();
  });

  it('keeps its owner through a save, and is a project asset once its song is gone', () => {
    const { f, songId, takeId } = setup();
    const raw = serializeProject(f.project) as { assets: Record<string, unknown>[] };
    expect(deserializeProject(raw).assets.find((a) => a.id === takeId)?.owner).toBe(songId);
    const orphan = { ...raw, assets: raw.assets.filter((a) => a.id !== songId) };
    expect(deserializeProject(orphan).assets.find((a) => a.id === takeId)?.owner).toBeUndefined();
    const sprite = {
      ...raw,
      assets: [...raw.assets, { id: 'sp', type: 'sprite', name: 'S', props: {}, owner: songId }],
    };
    expect(deserializeProject(sprite).assets.find((a) => a.id === 'sp')?.owner).toBeUndefined();
  });
});

describe('a pattern made in a song (#355)', () => {
  /** The song of `setup` at 140 BPM in 3/4, with a project pattern "Loose" and two instruments. */
  function withPatterns() {
    const s = setup();
    const { f, songId } = s;
    f.stack.execute(new SetAssetPropertyCommand(songId, 'tempo', 140));
    f.stack.execute(new SetAssetPropertyCommand(songId, 'beats', 3));
    const loose = new CreateAssetCommand('pattern', 'Loose');
    f.stack.execute(loose);
    const lead = new CreateAssetCommand('instrument', 'Lead');
    const bass = new CreateAssetCommand('instrument', 'Bass');
    f.stack.execute(lead);
    f.stack.execute(bass);
    const make = (props: Record<string, string | number> = {}) => {
      const made = new CreateAssetCommand(
        'pattern',
        embeddedName(f.project, songId, 'Pattern'),
        { ...songClockProps(s.song().props), bars: 1, ...props },
        songId,
      );
      f.stack.execute(made);
      return made.asset as PatternAsset;
    };
    return { ...s, loose: loose.asset as PatternAsset, leadId: lead.asset.id, bassId: bass.asset.id, make };
  }

  it('is a bar of the song on its clock, numbered among what the song keeps', () => {
    const { f, songId, make } = withPatterns();
    f.stack.execute(new CreateAssetCommand('pattern', 'Pattern 1'));
    const first = make();
    expect([first.name, first.owner, patternTempo(first.props)]).toEqual(['Pattern 1', songId, 140]);
    expect(patternMeter(first.props)).toEqual({ beats: 3, unit: 4 });
    expect(patternLength(first)).toBe(3 * 480);
    expect(make().name).toBe('Pattern 2');
  });

  it('follows the tempo and the meter of its song in the same undo step, and nothing else', () => {
    const { f, songId, loose, make } = withPatterns();
    const own = make();
    f.stack.execute(new SetAssetPropertyCommand(songId, 'tempo', 90));
    expect([patternTempo(own.props), patternTempo(loose.props)]).toEqual([90, 120]);
    f.stack.execute(new SetAssetPropertyCommand(songId, 'beat', '8'));
    expect(patternMeter(own.props)).toEqual({ beats: 3, unit: 8 });
    f.stack.execute(new ResetAssetPropertyCommand(songId, 'beats'));
    expect(patternMeter(own.props).beats).toBe(4);
    const grid = own.props.grid;
    f.stack.execute(new SetAssetPropertyCommand(songId, 'grid', '1/8'));
    expect([own.props.grid, findAsset(f.project, songId)?.props.grid]).toEqual([grid, '1/8']);
    f.stack.undo();
    f.stack.undo();
    expect(patternMeter(own.props)).toEqual({ beats: 3, unit: 8 });
    f.stack.undo();
    f.stack.undo();
    expect([patternTempo(own.props), patternMeter(own.props).unit]).toEqual([140, 4]);
  });

  it('hides its clock and its bus, not its length, instrument or sound FX', () => {
    const { loose, make } = withPatterns();
    const own = make();
    const keys = ['tempo', 'beats', 'beat', 'bus', 'bars', 'instrument', 'fx'];
    expect(keys.map((k) => isRowHiddenWhenEmbedded(own, k))).toEqual([
      true,
      true,
      true,
      true,
      false,
      false,
      false,
    ]);
    expect(isRowHiddenWhenEmbedded(loose, 'tempo')).toBe(false);
  });

  it('plays the instrument of the pattern on its track that starts last before it, else the first after', () => {
    const { f, track, edit, song, takeId, leadId, bassId, make } = withPatterns();
    const withLead = make({ instrument: leadId });
    const other = make();
    const items = [
      ...song().items,
      newItem({ track, kind: 'pattern', asset: withLead.id, tick: BAR, length: BAR }),
      {
        ...newItem({ track, kind: 'pattern', asset: other.id, tick: 3 * BAR, length: BAR }),
        instrument: bassId,
      },
      newItem({ track, kind: 'sound', asset: takeId, tick: 4 * BAR, length: BAR }),
    ];
    edit(items);
    const near = (tick: number, on = track) => instrumentNear(f.project, song().items, on, tick);
    expect([near(0), near(2 * BAR), near(3 * BAR), near(5 * BAR)]).toEqual([leadId, leadId, bassId, bassId]);
    expect(near(0, 'elsewhere')).toBe('');
  });

  it("takes the clock of the song it comes to as a copy, a project pattern's or another song's", () => {
    const { f, song, loose, track, edit } = withPatterns();
    const copy = embeddedCopy(loose, song()).copy as PatternAsset;
    expect([patternTempo(copy.props), patternTempo(loose.props)]).toEqual([140, 120]);
    const other = new CreateAssetCommand('song', 'Other');
    f.stack.execute(other);
    const theirs = new CreateAssetCommand('pattern', 'Theirs', { bars: 1 }, other.asset.id);
    f.stack.execute(theirs);
    edit([
      ...song().items,
      newItem({ track, kind: 'pattern', asset: theirs.asset.id, tick: 0, length: BAR }),
    ]);
    const named = findAssetOf(f.project, song().items.at(-1)!.asset, 'pattern')!;
    expect(named.id).not.toBe(theirs.asset.id);
    expect([named.owner, patternTempo(named.props), patternMeter(named.props).beats]).toEqual([
      song().id,
      140,
      3,
    ]);
  });
});