import { World, query, type Entity } from "../../src/index";
import {
  ActionCard,
  GameState,
  Player,
  Table,
  setupGame,
  type ActionKind,
} from "./components";
import {
  beginSelectionPhase,
  collectProposals,
  prepareNextRound,
  selectAction,
  chantPhase,
  fetchWaterPhase,
  exchangePhase,
  drinkPhase,
  endOfRoundPhase,
} from "./rules";
import {
  ACTION_LABELS,
  GameLog,
  formatAvailableActions,
  formatProposals,
  logPhaseDelta,
  logSnapshot,
  snapshotGame,
  winnerName,
} from "./logging";

export interface RandomPlaythroughOptions {
  seed?: number;
  playerNames?: readonly string[];
  maxRounds?: number;
}

export interface RandomPlaythroughResult {
  world: World;
  log: string;
  roundsPlayed: number;
}

export function generateRandomPlayLog(
  options: RandomPlaythroughOptions = {},
): RandomPlaythroughResult {
  const seed = options.seed ?? 20260701;
  const random = mulberry32(seed);
  const playerNames = options.playerNames ?? ["慧空", "明心", "了尘", "净远"];
  const maxRounds = options.maxRounds ?? 200;

  const world = new World();
  const players = setupGame(world, playerNames, random);
  const log = new GameLog();

  log.section(`三个和尚随机对局（种子=${seed}）`);
  log.add(`玩家：${playerNames.join("、")}`);
  log.add("初始状态：");
  logSnapshot(log, world);

  let roundsPlayed = 0;

  while (world.getSingleton(GameState).phase !== "gameOver") {
    if (roundsPlayed >= maxRounds) {
      throw new Error(`随机对局未能在 ${maxRounds} 轮内结束`);
    }

    const round = world.getSingleton(Table).round;
    log.section(`第 ${round} 轮`);
    beginSelectionPhase(world);

    for (const player of players) {
      const action = pickRandom(availableActions(world, player), random);
      const playerName = world.get(player, Player).name;
      log.add(
        `  ${playerName} 选择 ${ACTION_LABELS[action]}（可选：${formatAvailableActions(world, player)}）`,
      );
      selectAction(world, player, action);
    }

    const proposals = collectProposals(world);
    log.add(`  本轮行动阶段：${formatProposals(proposals)}`);

    applyLoggedPhase(log, world, "念经", () => chantPhase(world));
    applyLoggedPhase(log, world, "挑水", () => fetchWaterPhase(world));
    applyLoggedPhase(log, world, "交换", () => exchangePhase(world));
    applyLoggedPhase(log, world, "喝水", () => drinkPhase(world));
    if (world.getSingleton(GameState).phase === "gameOver") break;

    applyLoggedPhase(log, world, "轮末道具", () => endOfRoundPhase(world));
    if (world.getSingleton(GameState).phase === "gameOver") break;

    prepareNextRound(world);
    log.add("  轮末状态：");
    logSnapshot(log, world);
    roundsPlayed++;
  }

  roundsPlayed++;
  log.section("游戏结束");
  log.add(`胜者：${winnerName(world)}`);
  logSnapshot(log, world);

  return { world, log: log.toString(), roundsPlayed };
}

function applyLoggedPhase(
  log: GameLog,
  world: World,
  label: string,
  phase: () => void,
): void {
  const before = snapshotGame(world);
  phase();
  const after = snapshotGame(world);
  logPhaseDelta(log, label, before, after);
}

function availableActions(world: World, player: Entity): ActionKind[] {
  const actions: ActionKind[] = [];
  for (const card of world.query(query(ActionCard))) {
    const data = world.get(card, ActionCard);
    if (data.owner === player && data.zone === "hand") {
      actions.push(data.kind);
    }
  }
  if (actions.length === 0) {
    throw new Error(`${world.get(player, Player).name} 没有可选行动牌`);
  }
  return actions;
}

function pickRandom<T>(items: readonly T[], random: () => number): T {
  return items[Math.floor(random() * items.length)];
}

function mulberry32(seed: number): () => number {
  let state = seed >>> 0;
  return () => {
    state += 0x6d2b79f5;
    let t = state;
    t = Math.imul(t ^ (t >>> 15), t | 1);
    t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
  };
}

if (process.argv[1]?.endsWith("random-playthrough.ts")) {
  const result = generateRandomPlayLog();
  console.log(result.log);
}