import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import { eq } from 'drizzle-orm';
import { afterAll, beforeAll, describe, expect, it } from 'vitest';
import * as schema from '@/lib/db/schema';
import { getGameDb } from '@/lib/db/client';
import { FUEL_PRICE_PER_L, PLANE_TYPES } from '@/lib/game/catalog';
import { POST } from './route';

let dir: string;

beforeAll(async () => {
  // Same pattern as app/api/state/route.test.ts: point the DB singleton at a
  // throwaway file (fresh module registry per test file → fresh singleton).
  dir = await fs.mkdtemp(path.join(os.tmpdir(), 'flight-refuel-api-'));
  process.env.FLIGHT_DB_PATH = path.join(dir, 'refuel.db');
});

afterAll(async () => {
  delete process.env.FLIGHT_DB_PATH;
  await fs.rm(dir, { recursive: true, force: true });
});

const post = (planeId: string) => POST(new Request(`http://localhost/api/planes/${planeId}/refuel`), { params: Promise.resolve({ planeId }) });

describe('POST /api/planes/:planeId/refuel', () => {
  it('rejects an unknown id with 404', async () => {
    const res = await post('ghost');
    expect(res.status).toBe(404);
  });

  it('fills a partially empty tank and deducts (maxFuel − fuel) × FUEL_PRICE_PER_L from cash', async () => {
    const { db } = await getGameDb();
    await db.update(schema.planes).set({ fuel: 1_000 }).where(eq(schema.planes.id, 'plane-starter'));
    const cashBefore = (await db.select().from(schema.account))[0].cash;

    const res = await post('plane-starter');
    expect(res.status).toBe(200);

    const body = (await res.json()) as {
      account: { cash: number };
      planes: Array<{ id: string; fuel: number; maxFuel: number }>;
    };
    const cost = Math.round((PLANE_TYPES.atr72.maxFuel - 1_000) * FUEL_PRICE_PER_L * 100) / 100;
    expect(body.account.cash).toBeCloseTo(cashBefore - cost, 6);

    const plane = body.planes.find((p) => p.id === 'plane-starter')!;
    expect(plane.fuel).toBe(PLANE_TYPES.atr72.maxFuel); // back to full
  });

  it('rejects a flying plane with 409', async () => {
    const { db } = await getGameDb();
    await db.update(schema.planes)
      .set({ status: 'flying', departureSimTime: Date.now(), destIcao: 'LEMD' })
      .where(eq(schema.planes.id, 'plane-starter'));

    const res = await post('plane-starter');
    expect(res.status).toBe(409);
    expect(((await res.json()) as { error: string }).error).toMatch(/flying/);

    // Ground it again for later tests.
    await db.update(schema.planes)
      .set({ status: 'available', departureSimTime: null, destIcao: null })
      .where(eq(schema.planes.id, 'plane-starter'));
  });

  it('rejects the fill-up with 409 when cash is below the cost', async () => {
    const { db } = await getGameDb();
    await db.update(schema.planes).set({ fuel: 1_000 }).where(eq(schema.planes.id, 'plane-starter'));
    await db.update(schema.account).set({ cash: 10 }); // cost is ~4960

    const res = await post('plane-starter');
    expect(res.status).toBe(409);
    expect(((await res.json()) as { error: string }).error).toMatch(/insufficient funds/i);
  });
});