// Starts the real server on a free port with a throwaway database.
import { spawn } from 'node:child_process';
import { mkdtempSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { createServer } from 'node:net';

export const ADMIN_KEY = 'test-admin-key-1234567890';

const freePort = () => new Promise((resolve) => {
  const s = createServer().listen(0, () => { const { port } = s.address(); s.close(() => resolve(port)); });
});

export async function startServer(env = {}) {
  const dataDir = mkdtempSync(join(tmpdir(), 'bingo-test-'));
  const port = await freePort();
  const base = `http://127.0.0.1:${port}`;
  const proc = spawn(process.execPath, ['--disable-warning=ExperimentalWarning', 'server/server.mjs'], {
    env: {
      ...process.env, PORT: String(port), DATA_DIR: dataDir, ADMIN_KEY,
      SEASON_START: '2020-01-06', SEASON_END: '2099-12-31', GOAL: '500', BACKUP_KEEP: '0', ...env,
    },
    stdio: ['ignore', 'pipe', 'inherit'],
  });
  for (let i = 0; i < 50; i++) {
    try { if ((await fetch(base + '/healthz')).ok) break; } catch { /* not up yet */ }
    await new Promise((r) => setTimeout(r, 100));
  }
  return {
    base,
    stop() { proc.kill(); rmSync(dataDir, { recursive: true, force: true }); },
  };
}