import { randomInt, randomUUID } from 'node:crypto';
import { eq } from 'drizzle-orm';
import { getGameDb, persist } from '@/lib/db/client';
import * as schema from '@/lib/db/schema';
import { loadAirportsGeoJson } from '@/lib/airports';
import { generatePackage, mulberry32 } from '@/lib/game/seed';
import { tickNow } from '@/lib/sim/engine';

// TEST-ONLY hook (v0.7.0, adapted to packages in v0.12.0) — lets the e2e suite
// observe package expiry without waiting hours of game time. Disabled unless
// FLIGHT_TEST_HOOKS=1, which is set in docker-compose.yml for the e2e instance
// only; every other deployment 404s here.
//
// POST /api/test/expire-package
//   body { packageId?: string }
//   - with packageId: moves that OPEN package's deadline to now + HOOK_DEADLINE_MS
//     (game time) so the next fast tick expires it; 404 if unknown/not open.
//   - without: creates a fresh open package with the same short deadline.

const HOOK_DEADLINE_MS = 10_000; // game ms past the current clock (~0.2 s real at 60×)

export async function POST(req: Request) {
  if (process.env.FLIGHT_TEST_HOOKS !== '1') {
    return Response.json({ error: 'test hooks disabled' }, { status: 404 });
  }

  let body: unknown = {};
  try {
    const text = await req.text();
    body = text ? JSON.parse(text) : {};
  } catch {
    return Response.json({ error: 'invalid JSON body' }, { status: 400 });
  }
  if (typeof body !== 'object' || body === null || Array.isArray(body)) {
    return Response.json({ error: 'body must be a JSON object' }, { status: 400 });
  }
  const packageId = (body as Record<string, unknown>).packageId;
  if (packageId !== undefined && typeof packageId !== 'string') {
    return Response.json({ error: 'packageId must be a string' }, { status: 400 });
  }

  try {
    const inst = await getGameDb();
    const sim = await tickNow(); // clock is current before we set the deadline
    const deadlineSimTime = Math.round(sim.clockMs + HOOK_DEADLINE_MS);

    if (typeof packageId === 'string') {
      const rows = await inst.db.select().from(schema.packages).where(eq(schema.packages.id, packageId));
      const row = rows[0];
      if (!row || row.status !== 'open') {
        return Response.json({ error: 'package not found or not open' }, { status: 404 });
      }
      await inst.db.update(schema.packages).set({ deadlineSimTime }).where(eq(schema.packages.id, packageId));
      await persist(inst);
      const updated = (await inst.db.select().from(schema.packages).where(eq(schema.packages.id, packageId)))[0];
      return Response.json(updated ?? row);
    }

    const fc = await loadAirportsGeoJson();
    const airports = fc.features.map((f) => ({
      icao: f.properties.icao,
      name: f.properties.name,
      lat: f.properties.lat,
      lon: f.properties.lon,
    }));
    const rng = mulberry32(randomInt(0, 2 ** 31));
    const created = generatePackage({ id: randomUUID(), airports, rng, nowMs: sim.clockMs, deadlineOffsetMs: HOOK_DEADLINE_MS });
    await inst.db.insert(schema.packages).values(created);
    await persist(inst);
    return Response.json(created, { status: 201 });
  } catch (err) {
    console.error('test hook failed', err);
    return Response.json({ error: 'test hook failed' }, { status: 500 });
  }
}