import { computePathPlaybackSample } from '../types/tokenPathPlayback';
import type { GameSaveBody } from '../types/gameSave';
import { GAME_SAVE_SCHEMA_VERSION } from '../types/gameSave';
import type { Project } from '../types/domain';
import type { TokenPath } from '../types/tokenPath';
import type { TokenPathPlaybackEntry } from '../types/tokenPathSession';

export function defaultGameSaveName(now = new Date()): string {
  const p = (n: number) => String(n).padStart(2, '0');
  return `${p(now.getDate())}.${p(now.getMonth() + 1)}.${now.getFullYear()} ${p(now.getHours())}:${p(now.getMinutes())}`;
}

export function canonicalGameSave(body: GameSaveBody): string {
  return JSON.stringify(sortValue(body));
}

function sortValue(value: unknown): unknown {
  if (Array.isArray(value)) return value.map(sortValue);
  if (value && typeof value === 'object') {
    const src = value as Record<string, unknown>;
    const out: Record<string, unknown> = {};
    for (const key of Object.keys(src).sort()) out[key] = sortValue(src[key]);
    return out;
  }
  return value;
}

export function pathForPlacement(project: Project, kind: 'token' | 'npcToken', placementId: string): TokenPath | null {
  for (const scene of Object.values(project.scenes)) {
    const list = kind === 'token' ? scene.tokens : scene.npcTokens;
    const found = (list ?? []).find((token) => String(token.id) === placementId);
    if (found?.path && found.path.points.length >= 2) return found.path;
  }
  return null;
}

/** Движение и задержка становятся паузой в текущей точке пути. */
export function freezeTokenPathPlayback(
  playback: Record<string, TokenPathPlaybackEntry>,
  pathFor: (entry: TokenPathPlaybackEntry) => TokenPath | null,
  nowMs: number,
): Record<string, TokenPathPlaybackEntry> {
  const out: Record<string, TokenPathPlaybackEntry> = {};
  for (const [key, entry] of Object.entries(playback)) {
    out[key] = freezeEntry(entry, pathFor(entry), nowMs);
  }
  return out;
}

function freezeEntry(entry: TokenPathPlaybackEntry, path: TokenPath | null, nowMs: number): TokenPathPlaybackEntry {
  if (entry.phase === 'stopped' || entry.phase === 'done' || !path) {
    const phase = entry.phase === 'moving' || entry.phase === 'delay' ? 'stopped' : entry.phase;
    return { ...entry, phase, rejoinDist: null, segmentStartedAtMs: 0 };
  }
  const sample = computePathPlaybackSample({ path, entry, nowMs });
  if (!sample) {
    return { ...entry, phase: 'stopped', rejoinDist: null, segmentStartedAtMs: 0 };
  }
  const phase = sample.markDone || sample.phase === 'done' ? 'done' : 'stopped';
  return {
    ...entry,
    phase,
    baseDist: sample.sample.dist,
    rejoinDist: null,
    segmentStartedAtMs: 0,
    direction: 1,
  };
}

export function emptyGameSaveBody(projectId: string): GameSaveBody {
  return {
    schemaVersion: GAME_SAVE_SCHEMA_VERSION,
    projectId,
    graphNodeId: null,
    sceneId: null,
    darknessByCard: {},
    markersByCard: {},
    trapsByCard: {},
    effectsByCard: {},
    sceneTokensByPlacementId: {},
    npcTokens: { byPlacementId: {}, scale: 1, spawned: {} },
    tokenPaths: { presentationVisible: {}, playback: {} },
    timer: {
      durationMs: 0,
      remainingMs: 0,
      visibleToPlayers: false,
      layout: { cx: 0, cy: 0, scale: 1, rotationDeg: 0 },
    },
    playerTokens: { selectedPlayerIds: [], visible: false, byPlayerId: {} },
    camera: { scale: 1, ox: 0.5, oy: 0.5 },
    materials: { activeMaterialIds: [], layouts: {}, legendLayouts: {}, focusMaterialId: null },
    npcAvatars: { activeNpcIds: [], layouts: {}, focusNpcId: null },
    initiative: {
      enabled: false,
      entries: {},
      order: [],
      reserve: [],
      activeId: null,
      conditions: {},
      playersVisible: false,
    },
    tokenGridSnap: false,
  };
}