import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const projectRoot = path.join(path.dirname(fileURLToPath(import.meta.url)), '..');

function loadEnvFile(filePath) {
  if (!fs.existsSync(filePath)) return;
  for (const line of fs.readFileSync(filePath, 'utf8').split('\n')) {
    const trimmed = line.trim();
    if (!trimmed || trimmed.startsWith('#')) continue;
    const eq = trimmed.indexOf('=');
    if (eq < 0) continue;
    const key = trimmed.slice(0, eq).trim();
    const value = trimmed.slice(eq + 1).trim();
    if (!process.env[key]) process.env[key] = value;
  }
}

export function loadProjectEnv() {
  for (const file of ['.env', '.env.local']) {
    loadEnvFile(path.join(projectRoot, file));
  }
  const memindRoot = process.env.MEMIND_LIB_ROOT?.trim();
  if (memindRoot) {
    for (const file of ['.env', '.env.local']) {
      loadEnvFile(path.join(memindRoot, file));
    }
  }
  return projectRoot;
}

export { projectRoot };