import { Builder, ByteBuffer } from 'flatbuffers';
import { describe, expect, it } from 'vitest';
import * as fb from '../gen/fbs/scrabblefb';
import { decodeGameList, decodeSession, encodeSubmitPlay } from './codec';

describe('codec', () => {
  it('encodes a SubmitPlayRequest the gateway can read', () => {
    const buf = encodeSubmitPlay('g1', 'H', [
      { row: 7, col: 7, letter: 'A', blank: false },
      { row: 7, col: 8, letter: 'B', blank: true },
    ]);
    const r = fb.SubmitPlayRequest.getRootAsSubmitPlayRequest(new ByteBuffer(buf));
    expect(r.gameId()).toBe('g1');
    expect(r.dir()).toBe('H');
    expect(r.tilesLength()).toBe(2);
    expect(r.tiles(0)?.letter()).toBe('A');
    expect(r.tiles(1)?.blank()).toBe(true);
  });

  it('decodes a Session', () => {
    const b = new Builder(64);
    const token = b.createString('tok');
    const uid = b.createString('u1');
    const name = b.createString('Me');
    fb.Session.startSession(b);
    fb.Session.addToken(b, token);
    fb.Session.addUserId(b, uid);
    fb.Session.addIsGuest(b, true);
    fb.Session.addDisplayName(b, name);
    b.finish(fb.Session.endSession(b));
    expect(decodeSession(b.asUint8Array())).toEqual({
      token: 'tok',
      userId: 'u1',
      isGuest: true,
      displayName: 'Me',
    });
  });

  it('decodes a GameList including nested seat display names', () => {
    const b = new Builder(256);
    const aid = b.createString('a1');
    const dn = b.createString('Ann');
    fb.SeatView.startSeatView(b);
    fb.SeatView.addSeat(b, 1);
    fb.SeatView.addAccountId(b, aid);
    fb.SeatView.addScore(b, 13);
    fb.SeatView.addHintsUsed(b, 0);
    fb.SeatView.addIsWinner(b, false);
    fb.SeatView.addDisplayName(b, dn);
    const seat = fb.SeatView.endSeatView(b);
    const seats = fb.GameView.createSeatsVector(b, [seat]);
    const id = b.createString('g1');
    const variant = b.createString('english');
    const dv = b.createString('v1');
    const status = b.createString('active');
    const er = b.createString('');
    fb.GameView.startGameView(b);
    fb.GameView.addId(b, id);
    fb.GameView.addVariant(b, variant);
    fb.GameView.addDictVersion(b, dv);
    fb.GameView.addStatus(b, status);
    fb.GameView.addPlayers(b, 2);
    fb.GameView.addToMove(b, 0);
    fb.GameView.addTurnTimeoutSecs(b, 86400);
    fb.GameView.addMoveCount(b, 4);
    fb.GameView.addEndReason(b, er);
    fb.GameView.addSeats(b, seats);
    const game = fb.GameView.endGameView(b);
    const games = fb.GameList.createGamesVector(b, [game]);
    fb.GameList.startGameList(b);
    fb.GameList.addGames(b, games);
    b.finish(fb.GameList.endGameList(b));

    const gl = decodeGameList(b.asUint8Array());
    expect(gl.games).toHaveLength(1);
    expect(gl.games[0].id).toBe('g1');
    expect(gl.games[0].seats[0].displayName).toBe('Ann');
    expect(gl.games[0].seats[0].score).toBe(13);
  });
});