import assert from 'node:assert/strict';
import { spawnSync } from 'node:child_process';
import path from 'node:path';

const repoRoot = process.cwd();
const scriptPath = path.join(repoRoot, 'scripts', 'postgres-tuning-evidence.js');

function run(args) {
  return spawnSync(process.execPath, [scriptPath, ...args], {
    cwd: repoRoot,
    encoding: 'utf8',
    env: {
      PATH: process.env.PATH || '',
      Path: process.env.Path || '',
      SystemRoot: process.env.SystemRoot || '',
      ComSpec: process.env.ComSpec || '',
      TEMP: process.env.TEMP || '',
      TMP: process.env.TMP || '',
    },
  });
}

const sharedSql = run(['--print-sql', '--profile=shared-host']);
assert.equal(sharedSql.status, 0, sharedSql.stderr);
assert.match(sharedSql.stdout, /alter system set shared_buffers = '3GB';/);
assert.match(sharedSql.stdout, /alter system set statement_timeout = '30s';/);
assert.match(sharedSql.stdout, /alter system set jit = 'off';/);
assert.match(sharedSql.stdout, /alter system set track_io_timing = 'on';/);
assert.match(sharedSql.stdout, /alter system set track_wal_io_timing = 'on';/);
assert.match(sharedSql.stdout, /alter system set temp_file_limit = '4GB';/);

const dedicatedSql = run(['--print-sql', '--profile=dedicated-db']);
assert.equal(dedicatedSql.status, 0, dedicatedSql.stderr);
assert.match(dedicatedSql.stdout, /alter system set shared_buffers = '4GB';/);
assert.match(dedicatedSql.stdout, /alter system set max_wal_size = '8GB';/);
assert.match(dedicatedSql.stdout, /alter system set temp_file_limit = '8GB';/);

const invalidProfile = run(['--print-sql', '--profile=unknown']);
assert.notEqual(invalidProfile.status, 0, 'unknown profile should fail');
assert.match(`${invalidProfile.stderr}${invalidProfile.stdout}`, /Unknown PostgreSQL tuning profile/);

console.log('[PASS] PostgreSQL tuning evidence helpers');