import { test, expect, type Page } from '@playwright/test';

// v0.7.0 sim engine against the live origin: tick-on-read clock advance at a
// raised time scale, pause freezing, contract expiry (via the FLIGHT_TEST_HOOKS
// hook enabled in docker-compose.yml), and market top-up.

// Must match lib/sim/engine.ts — kept in sync manually (same pattern as MIN_ZOOM/MAX_ZOOM in map.spec.ts).
const MAX_TICK_ELAPSED_MS = 2_000;
const SCALE = 60;
const MAX_DELTA_PER_TICK = MAX_TICK_ELAPSED_MS * SCALE; // 120_000 game ms per tick at scale 60
// Must match MARKET_TARGET_OPEN_CONTRACTS in lib/game/seed.ts.
const MARKET_TARGET = 10;

interface SimState {
  clockMs: number;
  timeScale: number;
  paused: boolean;
}

interface StateBody {
  account: { cash: number; reputation: number };
  simState: SimState;
  planes: Array<Record<string, unknown>>;
  contracts: Array<{ id: string; status: string; deadlineSimTime: number }>;
}

const sleep = (ms: number) => new Promise((r) => setTimeout(r, ms));

async function postSim(page: Page, body: unknown) {
  return page.request.post('/api/sim', { data: body });
}

async function getState(page: Page): Promise<StateBody> {
  const res = await page.request.get('/api/state');
  expect(res.status()).toBe(200);
  return (await res.json()) as StateBody;
}

// Leave the live instance in a sane state for the other specs (scale 1, running).
test.afterEach(async ({ page }) => {
  const res = await postSim(page, { timeScale: 1, paused: false });
  expect(res.status()).toBe(200);
});

test('timeScale 60 advances the clock by roughly real-time × 60 between polls', async ({ page }) => {
  const post = await postSim(page, { timeScale: SCALE });
  expect(post.status()).toBe(200);
  const s1 = (await post.json()) as SimState;
  expect(s1.timeScale).toBe(SCALE);
  expect(s1.paused).toBe(false);

  let prev = s1.clockMs;
  for (let i = 0; i < 3; i++) {
    await sleep(1_000); // one real second ≈ 60 game seconds at scale 60 — well under the clamp
    const body = await getState(page);
    const now = body.simState.clockMs;
    expect(now).toBeGreaterThan(prev); // strictly advances while actively polled
    expect(now - prev).toBeGreaterThanOrEqual(30_000); // ≥ ~500 ms real × 60
    expect(now - prev).toBeLessThanOrEqual(MAX_DELTA_PER_TICK + 60); // clamp bounds each tick
    prev = now;
  }
});

test('paused freezes the clock exactly across polls', async ({ page }) => {
  const post = await postSim(page, { timeScale: SCALE, paused: true });
  expect(post.status()).toBe(200);
  const s1 = (await post.json()) as SimState;
  expect(s1.paused).toBe(true);

  for (let i = 0; i < 3; i++) {
    await sleep(500);
    const body = await getState(page);
    expect(body.simState.clockMs).toBe(s1.clockMs); // frozen — no advance while paused
  }
});

test('an open contract past its short deadline expires and the market stays topped up', async ({ page }) => {
  test.setTimeout(60_000);

  const before = await getState(page);
  const victim = before.contracts.find((c) => c.status === 'open');
  expect(victim).toBeDefined(); // steady state always has open contracts

  // Test-only hook (FLIGHT_TEST_HOOKS=1 in docker-compose): move an existing open
  // contract's deadline ~10 game-seconds out so expiry is observable at scale 60.
  const hook = await page.request.post('/api/test/expire-contract', { data: { contractId: victim!.id } });
  expect(hook.status()).toBe(200);
  const moved = (await hook.json()) as { id: string; deadlineSimTime: number };
  expect(moved.id).toBe(victim!.id);

  await postSim(page, { timeScale: SCALE });

  let expiredBody: StateBody | undefined;
  await expect
    .poll(async () => {
      const body = await getState(page);
      if (body.contracts.find((c) => c.id === moved.id)?.status === 'expired') expiredBody = body;
      return !!expiredBody;
    }, { timeout: 30_000, message: 'waiting for the short-deadline contract to expire' })
    .toBe(true);

  const after = expiredBody!;
  expect(after.contracts.find((c) => c.id === moved.id)?.status).toBe('expired');
  // Expired contracts leave the available set…
  expect(after.contracts.filter((c) => c.status === 'open').some((c) => c.id === moved.id)).toBe(false);
  // …and spawn tops the market back up to the target — never below it.
  const openCount = after.contracts.filter((c) => c.status === 'open').length;
  expect(openCount).toBeGreaterThanOrEqual(MARKET_TARGET);
});

test('the hook can also create a fresh short-deadline contract, which then expires', async ({ page }) => {
  test.setTimeout(60_000);

  const created = await page.request.post('/api/test/expire-contract');
  expect(created.status()).toBe(201);
  const c = (await created.json()) as { id: string; status: string };
  expect(c.status).toBe('open');

  await postSim(page, { timeScale: SCALE });

  let expiredBody: StateBody | undefined;
  await expect
    .poll(async () => {
      const body = await getState(page);
      if (body.contracts.find((x) => x.id === c.id)?.status === 'expired') expiredBody = body;
      return !!expiredBody;
    }, { timeout: 30_000, message: 'waiting for the hook-created contract to expire' })
    .toBe(true);

  const openCount = expiredBody!.contracts.filter((x) => x.status === 'open').length;
  expect(openCount).toBeGreaterThanOrEqual(MARKET_TARGET); // top-up held after this expiry too
});

test('POST /api/sim validates and clamps its input', async ({ page }) => {
  const clampHigh = await postSim(page, { timeScale: 500 });
  expect(clampHigh.status()).toBe(200);
  expect(((await clampHigh.json()) as SimState).timeScale).toBe(64); // top of the power-of-two ladder (v0.9.2)

  const clampLow = await postSim(page, { timeScale: 0.1 });
  expect(clampLow.status()).toBe(200);
  expect(((await clampLow.json()) as SimState).timeScale).toBe(1);

  for (const body of [{ timeScale: 'fast' }, { paused: 'yes' }, { bogus: 1 }]) {
    const res = await postSim(page, body);
    expect(res.status()).toBe(400);
  }
  const notJson = await page.request.post('/api/sim', { data: 'nope{' });
  expect(notJson.status()).toBe(400);

  // Empty body is a valid no-op (just ticks + returns current state).
  const empty = await postSim(page, {});
  expect(empty.status()).toBe(200);
});