import type { ChapterState, GameState, JourneyBeat, SetpieceDirective } from '../../types';

export function evaluateSetpieceOpportunity(params: {
  state: GameState;
  chapterState: ChapterState | null | undefined;
  journeyBeat: JourneyBeat | null | undefined;
}) {
  if (!params.chapterState) return false;
  return (
    params.chapterState.stage === 'climax'
    || params.journeyBeat?.beatType === 'boss_prelude'
    || params.state.currentScenePreset?.currentPressureLevel === 'extreme'
  );
}

export function buildSetpieceDirective(params: {
  state: GameState;
  chapterState: ChapterState | null | undefined;
  journeyBeat: JourneyBeat | null | undefined;
}) {
  if (!params.chapterState) return null;

  const setpieceType: SetpieceDirective['setpieceType'] =
    params.chapterState.stage === 'aftermath'
      ? 'aftermath'
      : params.chapterState.stage === 'climax'
        ? 'climax'
        : params.journeyBeat?.beatType === 'boss_prelude'
          ? 'boss_prelude'
          : 'showdown';

  return {
    id: `setpiece:${params.chapterState.id}:${setpieceType}`,
    title:
      setpieceType === 'climax'
        ? `${params.chapterState.title}·高潮`
        : setpieceType === 'aftermath'
          ? `${params.chapterState.title}·余波`
          : `${params.chapterState.title}·对峙`,
    setpieceType,
    relatedThreadIds: params.chapterState.primaryThreadIds,
    sceneFocusId: params.state.currentScenePreset?.id ?? null,
    dramaticQuestion:
      setpieceType === 'climax'
        ? '这一轮冲突会把谁的真相和代价一起推到台前？'
        : setpieceType === 'aftermath'
          ? '高潮过后，谁会先承受余波？'
          : '这一步会把暗线逼到什么程度？',
  } satisfies SetpieceDirective;
}