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 { 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-load-api-'));
  process.env.FLIGHT_DB_PATH = path.join(dir, 'load.db');
});

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

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

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

  it('rejects an unknown package id with 404', async () => {
    const res = await post('nope', { planeId: 'plane-starter' });
    expect(res.status).toBe(404);
    expect(((await res.json()) as { error: string }).error).toMatch(/not found/);
  });

  it('rejects an unknown plane id with 404', async () => {
    const { db } = await getGameDb();
    await db.insert(schema.packages).values({
      id: 'p-ghost-plane', originIcao: 'EDDF', destIcao: 'LEMD', reward: 1, cargoType: 'Mail', cargoCount: 1,
      deadlineSimTime: Date.now() + 3_600_000, status: 'open', planeId: null, createdSimTime: Date.now(), createdRealMs: Date.now(), // v0.65.0 — fresh wall-clock stamp or the pre-action tick expires it
    });

    const res = await post('p-ghost-plane', { planeId: 'ghost' });
    expect(res.status).toBe(404);
  });

  it('rejects loading a package whose origin the plane is not at with 409', async () => {
    const { db } = await getGameDb();
    // The seeded starter sits at EDDF — a package from LEMD cannot be loaded there.
    await db.insert(schema.packages).values({
      id: 'p-elsewhere', originIcao: 'LEMD', destIcao: 'EDDF', reward: 1, cargoType: 'Mail', cargoCount: 1,
      deadlineSimTime: Date.now() + 3_600_000, status: 'open', planeId: null, createdSimTime: Date.now(), createdRealMs: Date.now(), // v0.65.0 — fresh wall-clock stamp or the pre-action tick expires it
    });

    const res = await post('p-elsewhere', { planeId: 'plane-starter' });
    expect(res.status).toBe(409);
    expect(((await res.json()) as { error: string }).error).toMatch(/at EDDF/);
  });

  it('rejects loading a non-open package with 409', async () => {
    const { db } = await getGameDb();
    await db.insert(schema.packages).values({
      id: 'p-busy', originIcao: 'EDDF', destIcao: 'LEMD', reward: 1, cargoType: 'Mail', cargoCount: 1,
      deadlineSimTime: Date.now() + 3_600_000, status: 'loaded', planeId: 'plane-starter', createdSimTime: Date.now(),
    });

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

  it('loads an open package at the plane\'s airport and returns the full snapshot', async () => {
    const { db } = await getGameDb();
    // A known open package originating where the starter actually sits (EDDF).
    await db.insert(schema.packages).values({
      id: 'p-home', originIcao: 'EDDF', destIcao: 'LEMD', reward: 1_000, cargoType: 'Mail', cargoCount: 4,
      deadlineSimTime: Date.now() + 24 * 3_600_000, status: 'open', planeId: null, createdSimTime: Date.now(), createdRealMs: Date.now(), // v0.65.0 — fresh wall-clock stamp or the pre-action tick expires it
    });

    const res = await post('p-home', { planeId: 'plane-starter' });
    expect(res.status).toBe(200);
    expect(res.headers.get('content-type')).toContain('application/json');

    // Response convention (v0.8.0): the FULL snapshot, same shape as GET /api/state.
    const body = (await res.json()) as {
      account: { cash: number };
      simState: { clockMs: number }; // ISS-117
      planes: Array<Record<string, unknown>>;
      packages: Array<{ id: string; status: string; planeId: string | null }>;
    };
    expect(Object.keys(body).sort()).toEqual([
      'account',
      'catalog',
      'fuelPricePerL',
      'packages',
      'planes',
      'sellFraction',
      'simState',
    ]);
    const loaded = body.packages.find((p) => p.id === 'p-home')!;
    expect(loaded.status).toBe('loaded');
    expect(loaded.planeId).toBe('plane-starter');

    // Persisted, not just in the response.
    const row = (await db.select().from(schema.packages).where(eq(schema.packages.id, 'p-home')))[0];
    expect(row.status).toBe('loaded');
    expect(row.planeId).toBe('plane-starter');

    // A second load of the same package is rejected — it is no longer open.
    const again = await post('p-home', { planeId: 'plane-starter' });
    expect(again.status).toBe(409);
  });
});