import type { Page } from '@playwright/test';
import { expect, test } from '@playwright/test';
// Real helpers (v0.39.0) — the broken-state burn math must match lib/ exactly; Playwright resolves
// the repo's tsconfig paths, so importing beats mirroring a third copy of the formulas.
import { initialBearingDeg } from '../lib/geo';
import { weatherFor } from '../lib/weather';
import { fuelAtWeighted, windBurnFactor } from '../lib/sim/movement';
// v0.39.0 (ISS-069) — maintenance: expectations use the real balance constants + burn helpers.
import { BROKEN_BURN_MULTIPLIER, REPAIR_COST } from '../lib/game/catalog';

// v0.39.0 (ISS-069) — maintenance visible flow against the live origin: health is shown per plane in
// the fleet list; forcing it to 0 via the set-health hook shows the "broken" pill and makes a short
// full-tank leg burn ×1.5 more fuel (asserted with the real lib helpers); clicking Repair deducts
// exactly REPAIR_COST, restores health and grounds the plane ("in repair" pill) until its gate
// passes; shortening the gate via the hook brings it back to service on the next tick.

const SCALE = 1000; // fastest sim speed (v0.14.0 ladder top) — keeps flights to seconds of real time
const HUB = 'EDDF'; // must match HUB_ICAO in lib/game/seed.ts
const STARTER = 'plane-starter';

interface PlaneState {
  id: string;
  model: string;
  status: 'available' | 'flying' | 'repairing';
  fuel: number;
  maxFuel: number;
  locationIcao: string;
  destIcao: string | null;
  health: number; // v0.39.0 (ISS-069) — structural health in [0, 100]
  repairUntilSimTime: number | null; // v0.39.0 (ISS-069) — active repair gate
}

interface CatalogEntry {
  model: string;
  burnPerKm: number;
  emptyWeightKg: number;
  maxFuel: number;
}

interface StateBody {
  account: { cash: number };
  simState: { clockMs: number; timeScale: number; paused: boolean };
  planes: PlaneState[];
  catalog: CatalogEntry[];
}

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;
}

// Set the time scale and VERIFY from the response that it stuck — a silent reset would otherwise
// surface as an unexplained wait timeout. Also clears pause (ISS-041: landings slow to 1×).
async function setScale(page: Page, scale: number): Promise<void> {
  const res = await page.request.post('/api/sim', { data: { timeScale: scale, paused: false } });
  expect(res.status()).toBe(200);
  const body = (await res.json()) as { timeScale: number };
  expect(body.timeScale, `timeScale should be ${scale} after POST /api/sim`).toBe(scale);
}

// Test hook (FLIGHT_TEST_HOOKS=1): force a plane's health and/or shorten an active repair gate.
async function setHealth(
  page: Page,
  body: { planeId: string; health?: number; repairUntilMs?: number },
): Promise<StateBody> {
  const res = await page.request.post('/api/test/set-health', { data: body });
  expect(res.status()).toBe(200);
  return (await res.json()) as StateBody;
}

// Test hook (FLIGHT_TEST_HOOKS=1): top a plane's tank back to full — replaces the removed /refuel
// endpoint (ISS-082). Reads maxFuel from the snapshot so no catalog mirror is needed.
async function setFuelFull(page: Page, planeId: string): Promise<void> {
  const s = await getState(page);
  const p = s.planes.find((x) => x.id === planeId)!;
  expect((await page.request.post('/api/test/set-fuel', { data: { planeId, fuel: p.maxFuel } })).status()).toBe(200);
}

// Mirrors haversineKm in lib/geo.ts (same formula → identical floats).
function haversineKm(lat1: number, lon1: number, lat2: number, lon2: number): number {
  const toRad = (d: number) => (d * Math.PI) / 180;
  const dLat = toRad(lat2 - lat1);
  const dLon = toRad(lon2 - lon1);
  const a =
    Math.sin(dLat / 2) ** 2 +
    Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) * Math.sin(dLon / 2) ** 2;
  return 2 * 6371 * Math.asin(Math.min(1, Math.sqrt(a)));
}

// Closest airport to EDDF from /api/airports — the short fixed leg for the broken-burn flight.
// Returns both endpoints' coordinates so the exact-km fuel assertion can mirror lib/geo.ts.
async function nearestToHub(page: Page): Promise<{ icao: string; lat: number; lon: number; hubLat: number; hubLon: number }> {
  const fc = (await (await page.request.get('/api/airports')).json()) as {
    features: Array<{ properties: { icao: string; lat: number; lon: number } }>;
  };
  const hub = fc.features.find((f) => f.properties.icao === HUB)!.properties;
  let nearest = fc.features.filter((f) => f.properties.icao !== HUB)[0].properties;
  for (const f of fc.features) {
    if (f.properties.icao === HUB) continue;
    if (haversineKm(hub.lat, hub.lon, f.properties.lat, f.properties.lon) < haversineKm(hub.lat, hub.lon, nearest.lat, nearest.lon)) {
      nearest = f.properties;
    }
  }
  return { icao: nearest.icao, lat: nearest.lat, lon: nearest.lon, hubLat: hub.lat, hubLon: hub.lon };
}

// Self-heal: let any in-flight leg finish and reposition plane-starter to the hub (shared DB — an
// interrupted earlier run may have left it elsewhere or airborne). Same pattern as flyHomeViaApi in
// right-pane.spec.ts; cargo cleanup is skipped because this flow asserts cash DELTAS, not absolutes.
async function healStarterHome(page: Page): Promise<void> {
  let s = await getState(page);
  let starter = s.planes.find((p) => p.id === STARTER)!;
  if (starter.status === 'repairing') {
    // An interrupted run may have left it mid-repair — shorten the gate so the next tick flips it back.
    await setHealth(page, { planeId: STARTER, health: 100, repairUntilMs: 0 });
    await expect
      .poll(async () => ((await getState(page)).planes.find((p) => p.id === STARTER)?.status ?? ''), {
        timeout: 30_000,
        message: 'waiting for the shortened repair gate to flip plane-starter back',
      })
      .toBe('available');
    s = await getState(page);
    starter = s.planes.find((p) => p.id === STARTER)!;
  }
  if (starter.status === 'flying' || starter.locationIcao !== HUB) {
    // Fast-forward any leftover leg / repositioning flight (~20 s real time worst case at 1000×).
    await setScale(page, SCALE);
  }
  if (starter.status === 'flying') {
    await expect
      .poll(async () => ((await getState(page)).planes.find((p) => p.id === STARTER)?.status ?? ''), {
        timeout: 240_000,
        message: 'waiting for an in-flight plane-starter to land',
      })
      .toBe('available');
    s = await getState(page);
    starter = s.planes.find((p) => p.id === STARTER)!;
  }
  if (starter.locationIcao !== HUB) {
    // ISS-041: the landing above slowed the sim to 1× — setScale restores it for the return leg.
    await setScale(page, SCALE);
    // ISS-082: dispatch auto-refuels, so a grounded plane can always start any full-tank-flyable
    // leg when cash allows — no top-up retry needed.
    const flyHome = await page.request.post(`/api/planes/${STARTER}/fly`, { data: { destIcao: HUB } });
    expect(flyHome.status()).toBe(200); // repositioning needs no package (v0.12.0 manual flight)
    await expect
      .poll(async () => ((await getState(page)).planes.find((p) => p.id === STARTER)?.locationIcao ?? ''), {
        timeout: 240_000,
        message: 'waiting for plane-starter to land back at the hub',
      })
      .toBe(HUB);
  }
}

// Leave a clean starter for later spec files (shared DB, workers:1): full health and no active
// repair gate — an interrupted run may have left the plane mid-repair or worn down.
async function restoreStarter(page: Page): Promise<void> {
  const s = await getState(page);
  const starter = s.planes.find((p) => p.id === STARTER)!;
  const body: { planeId: string; health?: number; repairUntilMs?: number } = { planeId: STARTER, health: 100 };
  if (starter.status === 'repairing') body.repairUntilMs = 0; // shorten the active gate → flips on the next tick
  await setHealth(page, body);
}

test.describe.configure({ mode: 'serial' }); // shared live DB — order matters within this file

// On exit (success or failure): restore scale=1 / unpaused for the other specs (house convention)
// and leave a clean starter — full health, no active repair gate.
test.afterEach(async ({ page }) => {
  const res = await page.request.post('/api/sim', { data: { timeScale: 1, paused: false } });
  expect(res.status()).toBe(200);
  await restoreStarter(page);
});

test('health shown → broken burn ×1.5 → repair grounds for 3 sim days → back to service', async ({ page }) => {
  test.setTimeout(300_000); // self-heal + one short leg at 1000× + the shortened repair gate wait

  await healStarterHome(page); // deterministic: the starter sits grounded at EDDF

  // (a) Force health to 42 — snapshot AND UI show it.
  let s = await setHealth(page, { planeId: STARTER, health: 42 });
  expect(s.planes.find((p) => p.id === STARTER)!.health).toBe(42);

  await page.goto('/');
  const row = page.getByTestId(`plane-${STARTER}`);
  await expect(row, 'the starter fleet row renders').toBeVisible({ timeout: 15_000 });
  await expect(page.getByTestId(`plane-health-${STARTER}`), 'health readout shows the forced value')
    .toContainText('42%');

  // (b) Force broken — the pill shows, and a short full-tank leg burns ×1.5 more fuel.
  s = await setHealth(page, { planeId: STARTER, health: 0 });
  expect(s.planes.find((p) => p.id === STARTER)!.health).toBe(0);
  await expect(page.getByTestId(`plane-broken-${STARTER}`), 'the broken pill appears')
    .toHaveText('broken', { timeout: 15_000 });

  // Full tank for the flight (ISS-082 hook — dispatch would only top up to 150% of the leg, not full)…
  await setFuelFull(page, STARTER);
  s = await getState(page);
  const starter = s.planes.find((p) => p.id === STARTER)!;
  expect(starter.fuel).toBe(starter.maxFuel);

  // …then fly the short fixed leg HUB → nearest via the API (the UI under test is maintenance, not dispatch).
  const nearest = await nearestToHub(page);
  expect((await page.request.post(`/api/planes/${STARTER}/fly`, { data: { destIcao: nearest.icao } })).status()).toBe(200);
  await setScale(page, SCALE);
  await expect
    .poll(async () => ((await getState(page)).planes.find((p) => p.id === STARTER)?.locationIcao ?? ''), {
      timeout: 120_000,
      message: 'waiting for the broken plane to land at the nearest airport',
    })
    .toBe(nearest.icao);

  // Landed fuel matches the ×1.5-adjusted closed form (real lib helpers — same pattern as right-pane.spec.ts).
  s = await getState(page);
  const landed = s.planes.find((p) => p.id === STARTER)!;
  const entry = s.catalog.find((e) => e.model === starter.model)!;
  const km = haversineKm(nearest.hubLat, nearest.hubLon, nearest.lat, nearest.lon);
  const wHub = weatherFor(HUB);
  const burn = entry.burnPerKm * windBurnFactor(wHub.windKt, wHub.windDirDeg, initialBearingDeg(nearest.hubLat, nearest.hubLon, nearest.lat, nearest.lon));
  expect(landed.fuel).toBeCloseTo(fuelAtWeighted(starter.maxFuel, burn * BROKEN_BURN_MULTIPLIER, entry.emptyWeightKg, entry.maxFuel, km, 1), 6);
  // Wear clamped at 0 — the broken plane stays broken.
  expect(landed.health).toBe(0);

  // (c) Repair through the UI: exact cash drop + "in repair" pill.
  const cashBefore = s.account.cash;
  const repairBtn = page.getByTestId(`repair-${STARTER}`);
  await expect(repairBtn, 'the Repair button shows for a grounded worn plane').toBeVisible({ timeout: 15_000 });
  // The click fires the POST asynchronously — capture the endpoint's OWN response so the cash drop is
  // checked against the exact game clock the server used (a later GET would tick further).
  const [res] = await Promise.all([
    page.waitForResponse((r) => r.url().includes(`/api/planes/${STARTER}/repair`), { timeout: 15_000 }),
    repairBtn.click(),
  ]);
  expect(res.status()).toBe(200);
  const post = (await res.json()) as StateBody; // full post-action snapshot at the action's clock
  expect(post.account.cash).toBeCloseTo(cashBefore - REPAIR_COST, 6); // exactly REPAIR_COST
  const repaired = post.planes.find((p) => p.id === STARTER)!;
  expect(repaired.status).toBe('repairing');
  expect(repaired.health).toBe(100); // restored to full…
  expect(repaired.repairUntilSimTime).not.toBeNull(); // …with the gate set (3 sim days out)

  await expect(page.getByTestId(`plane-repairing-${STARTER}`), 'the "in repair" pill appears')
    .toHaveText('in repair', { timeout: 15_000 });

  // (d) Shorten the gate via the hook — the plane comes back to service on the next tick.
  await setHealth(page, { planeId: STARTER, repairUntilMs: 10_000 });
  await setScale(page, SCALE); // fast-forward the shortened gate (each tick advances up to 2 s × scale)
  await expect
    .poll(async () => {
      const p = (await getState(page)).planes.find((x) => x.id === STARTER)!;
      return p.status === 'available' && p.health === 100 ? true : false;
    }, { timeout: 60_000, message: 'waiting for the shortened repair gate to flip the plane back' })
    .toBe(true);
});