import { execFileSync } from 'node:child_process';
import { createRequire } from 'node:module';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

import { Client } from 'pg';

import { collabTestDatabaseUrl } from './src/testing/test-db.js';

const require = createRequire(import.meta.url);
const here = dirname(fileURLToPath(import.meta.url));

/**
 * Prepare the isolated collab test database (see `test-db.ts`): create it if
 * missing, then push the current Prisma schema (owned by the api package) into
 * it. Runs once per test run; a no-op when `TEST_DATABASE_URL` is unset, in
 * which case the DB-backed suite skips itself.
 */
export default async function globalSetup(): Promise<void> {
  const base = process.env.TEST_DATABASE_URL;
  if (!base) return;

  const target = collabTestDatabaseUrl(base);
  const dbName = decodeURIComponent(new URL(target).pathname.slice(1));

  const admin = new Client({ connectionString: base });
  await admin.connect();
  try {
    const exists = await admin.query('SELECT 1 FROM pg_database WHERE datname = $1', [dbName]);
    if (exists.rowCount === 0) {
      // Identifier can't be parameterised; dbName is derived from our own env.
      await admin.query(`CREATE DATABASE "${dbName}"`);
    }
  } finally {
    await admin.end();
  }

  execFileSync(
    process.execPath,
    [
      require.resolve('prisma/build/index.js'),
      'db',
      'push',
      '--skip-generate',
      '--schema',
      resolve(here, '../api/prisma/schema.prisma'),
    ],
    { env: { ...process.env, DATABASE_URL: target }, stdio: 'inherit', cwd: here },
  );
}