// Quick engine sanity sim: play full all-AI matches, assert no illegal states.
import { chooseCardAI, chooseTrumpAI } from "../src/lib/hokm/ai";
import {
  advanceAfterTrick,
  chooseTrump,
  createInitialState,
  dealForTrump,
  playCard,
  selectHakem,
  startNextRound,
} from "../src/lib/hokm/engine";
import { GameState } from "../src/lib/hokm/types";
import { applyMatchResult, getLeagueInfo } from "../src/lib/online/gamification";
import { MatchSummary, UserProfile } from "../src/lib/online/types";

function playMatch(seed: number): { rounds: number; tricks: number } {
  let s = createInitialState({
    names: ["P0", "P1", "P2", "P3"],
    targetScore: 7,
  });
  s = selectHakem(s);
  s = dealForTrump(s);
  let rounds = 0;
  let tricks = 0;
  let guard = 0;

  while (s.phase !== "match-over") {
    guard++;
    if (guard > 100000) throw new Error("loop guard tripped");

    if (s.phase === "choosing-trump") {
      const suit = chooseTrumpAI(s.players[s.hakem!].hand);
      s = chooseTrump(s, suit);
      continue;
    }

    if (s.phase === "playing") {
      const seat = s.turn!;
      const card = chooseCardAI(s, seat);
      s = playCard(s, seat, card);
      continue;
    }

    if (s.phase === "trick-complete") {
      tricks++;
      // sanity: 4 cards in trick
      if (s.currentTrick.length !== 4) throw new Error("trick not full");
      s = advanceAfterTrick(s, 2);
      continue;
    }

    if (s.phase === "round-over") {
      rounds++;
      // sanity: total tricks this round <= 13
      const total = s.roundTricks[0] + s.roundTricks[1];
      if (total > 13) throw new Error("too many tricks: " + total);
      s = startNextRound(s);
      continue;
    }

    throw new Error("unexpected phase: " + s.phase);
  }
  return { rounds, tricks };
}

let totalRounds = 0;
const N = 200;
for (let i = 0; i < N; i++) {
  const r = playMatch(i);
  totalRounds += r.rounds;
}
console.log(`OK: ${N} matches completed. avg rounds/match = ${(totalRounds / N).toFixed(1)}`);

/* ----------------------- gamification checks ----------------------- */

function baseProfile(): UserProfile {
  return {
    id: "u",
    username: "u",
    displayName: "Tester",
    avatar: "a-fox",
    level: 1,
    xp: 0,
    coins: 1000,
    rating: 1000,
    stats: {
      games: 0, wins: 0, losses: 0, kotsFor: 0, kotsAgainst: 0,
      tricks: 0, bestWinStreak: 0, currentWinStreak: 0,
    },
    ownedAvatars: ["a-fox"],
    ownedThemes: ["royal"],
    achievements: {},
    unlocked: [],
    createdAt: 0,
  };
}

function assert(cond: boolean, msg: string) {
  if (!cond) throw new Error("ASSERT FAILED: " + msg);
}

let profile = baseProfile();
let firstWinSeen = false;
const M = 500;
for (let i = 0; i < M; i++) {
  const won = (i * 7 + 3) % 5 < 3; // deterministic-ish mix
  const kot = i % 6 === 0;
  const summary: MatchSummary = {
    ranked: true,
    stake: 100,
    won,
    kotFor: won && kot,
    kotAgainst: !won && kot,
    tricksWon: won ? 7 + (i % 6) : i % 7,
    rounds: 7,
    trump: "spades",
  };
  const before = profile;
  const { profile: after, reward } = applyMatchResult(before, summary, 1000);

  // rating moves the right way for ranked
  if (won) assert(reward.ratingDelta > 0, "ranked win should raise rating");
  else assert(reward.ratingDelta < 0, "ranked loss should lower rating");
  // coins never negative
  assert(after.coins >= 0, "coins never negative");
  // xp gained, level monotonic
  assert(reward.xpGained > 0, "xp gained");
  assert(after.level >= before.level, "level monotonic");
  // unlocked list only grows
  assert(after.unlocked.length >= before.unlocked.length, "achievements monotonic");
  // first win unlocks first_win
  if (won && !firstWinSeen) {
    firstWinSeen = true;
    assert(after.unlocked.includes("first_win"), "first_win unlocks on first win");
  }
  profile = after;
}

// casual match must not change rating
{
  const r = applyMatchResult(baseProfile(), {
    ranked: false, stake: 0, won: true, kotFor: false, kotAgainst: false,
    tricksWon: 7, rounds: 7, trump: null,
  }, 1000);
  assert(r.reward.ratingDelta === 0, "casual match must not change rating");
}

// league boundaries sane
assert(getLeagueInfo(1000).tier.id === "bronze", "1000 = bronze");
assert(getLeagueInfo(1350).tier.id === "gold", "1350 = gold");
assert(getLeagueInfo(2000).tier.id === "master", "2000 = master");

console.log(
  `OK: gamification ${M} results. final level=${profile.level} rating=${Math.round(profile.rating)} ` +
    `coins=${profile.coins} achievements=${profile.unlocked.length} league=${getLeagueInfo(profile.rating).tier.id}`
);