import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import { afterAll, beforeAll, describe, expect, it } from 'vitest';
import * as schema from '@/lib/db/schema';
import { getGameDb } from '@/lib/db/client';
import { POST as acceptPost } from '../../../contracts/[id]/accept/route';
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-dispatch-api-'));
  process.env.FLIGHT_DB_PATH = path.join(dir, 'dispatch.db');
});

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

const post = (planeId: string, body: unknown) =>
  POST(new Request(`http://localhost/api/planes/${planeId}/dispatch`, { method: 'POST', body: JSON.stringify(body) }), {
    params: Promise.resolve({ planeId }),
  });

describe('POST /api/planes/:planeId/dispatch', () => {
  it('rejects a missing/non-string contractId and unknown fields with 400', async () => {
    for (const body of [{}, { contractId: 42 }, { bogus: 1 }]) {
      const res = await post('plane-starter', body);
      expect(res.status).toBe(400);
      expect(((await res.json()) as { error: string }).error).toBeTruthy();
    }
  });

  it('rejects dispatching an OPEN contract (no accept) with 409 — the e2e "dispatch without accept" path', async () => {
    const { db } = await getGameDb();
    // A known open contract at the starter plane's home base.
    await db.insert(schema.contracts).values({
      id: 'c-open-at-home', originIcao: 'EDDF', destIcao: 'LEMD', reward: 1, cargoType: 'Mail', cargoCount: 1,
      deadlineSimTime: Date.now() + 3_600_000, status: 'open', planeId: null, createdSimTime: Date.now(),
    });

    const res = await post('plane-starter', { contractId: 'c-open-at-home' });
    expect(res.status).toBe(409);
    expect(((await res.json()) as { error: string }).error).toMatch(/open/);
  });

  it('rejects unknown plane and contract ids with 404', async () => {
    const { db } = await getGameDb();
    // Contract checks run before plane checks, so the ghost-plane case needs an
    // ACCEPTED contract to reach the plane lookup.
    await db.insert(schema.contracts).values({
      id: 'c-acc-ghost', originIcao: 'EDDF', destIcao: 'LEMD', reward: 1, cargoType: 'Mail', cargoCount: 1,
      deadlineSimTime: Date.now() + 3_600_000, status: 'accepted', planeId: null, createdSimTime: Date.now(),
    });

    const ghostPlane = await post('ghost-plane', { contractId: 'c-acc-ghost' });
    expect(ghostPlane.status).toBe(404);

    const ghostContract = await post('plane-starter', { contractId: 'nope' });
    expect(ghostContract.status).toBe(404);
  });

  it('accepts then dispatches: snapshot shows the plane flying with departure set and the contract bound', async () => {
    const { db } = await getGameDb();
    // Accept the home-base contract through its own route, then dispatch.
    const acceptRes = await acceptPost(
      new Request('http://localhost/api/contracts/c-open-at-home/accept'),
      { params: Promise.resolve({ id: 'c-open-at-home' }) },
    );
    expect(acceptRes.status).toBe(200);

    const res = await post('plane-starter', { contractId: 'c-open-at-home' });
    expect(res.status).toBe(200);

    const body = (await res.json()) as {
      planes: Array<{ id: string; status: string; departureSimTime: number | null; locationIcao: string }>;
      contracts: Array<{ id: string; status: string; planeId: string | null }>;
    };
    const plane = body.planes.find((p) => p.id === 'plane-starter')!;
    expect(plane.status).toBe('flying');
    expect(typeof plane.departureSimTime).toBe('number'); // departure set at dispatch time
    expect(plane.locationIcao).toBe('EDDF');

    const contract = body.contracts.find((c) => c.id === 'c-open-at-home')!;
    expect(contract.status).toBe('accepted');
    expect(contract.planeId).toBe('plane-starter');

    // A second dispatch of the same (now bound, still accepted) contract by the
    // flying plane is rejected — the plane is no longer available.
    const again = await post('plane-starter', { contractId: 'c-open-at-home' });
    expect(again.status).toBe(409);
  });
});