import type { Color } from '@blind-chess/shared';
import type { Game } from './state.js';

export function endGame(game: Game, reason: Game['endReason'], winner: Color | null): void {
  game.status = 'finished';
  game.endReason = reason;
  game.winner = winner;
  game.finishedAt = Date.now();
}

export function finalizeIfEnded(game: Game, announcements: ReadonlyArray<{ text: string }>): void {
  // Detect terminal moderator announcements.
  const lastTexts = new Set(announcements.map((a) => a.text));
  if (lastTexts.has('white_checkmate')) endGame(game, 'checkmate', 'w');
  else if (lastTexts.has('black_checkmate')) endGame(game, 'checkmate', 'b');
  else if (lastTexts.has('stalemate')) endGame(game, 'stalemate', null);
  else if (lastTexts.has('draw_insufficient')) endGame(game, 'insufficient', null);
  else if (lastTexts.has('draw_threefold')) endGame(game, 'threefold', null);
  else if (lastTexts.has('draw_fifty')) endGame(game, 'fifty_move', null);
}