const fs = require('fs');
const path = require('path');

const CANONICAL_SECRETS_FILE = '/Users/bingshuolingdianyuanhe/Documents/guanghulab-local-secrets/video-ai-system.env';

function loadEnvFile(file) {
  if (!file || !fs.existsSync(file)) return false;

  const content = fs.readFileSync(file, 'utf8');
  for (const line of content.split(/\r?\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 (!key || !value) continue;

    if (!process.env[key]) process.env[key] = value;
  }

  return true;
}

function loadVideoAiEnv(localEnvPath = path.resolve(__dirname, '../.env')) {
  const loaded = [];
  const files = [
    process.env.VIDEO_AI_SECRETS_FILE,
    CANONICAL_SECRETS_FILE,
    localEnvPath,
  ];

  for (const file of files) {
    if (loadEnvFile(file)) loaded.push(file);
  }

  return loaded;
}

module.exports = {
  CANONICAL_SECRETS_FILE,
  loadVideoAiEnv,
};
