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

/**
 * Helper function to read variables from .env file synchronously if it exists.
 * This prevents hardcoding credentials in this config file which gets tracked by git.
 */
function readEnv() {
  const envPath = path.join(__dirname, '.env');
  if (!fs.existsSync(envPath)) return {};
  const lines = fs.readFileSync(envPath, 'utf8').split('\n');
  const env = {};
  for (const line of lines) {
    const trimmed = line.trim();
    if (!trimmed || trimmed.startsWith('#')) continue;
    const idx = trimmed.indexOf('=');
    if (idx === -1) continue;
    const key = trimmed.substring(0, idx).trim();
    let val = trimmed.substring(idx + 1).trim();
    if ((val.startsWith('"') && val.endsWith('"')) || (val.startsWith("'") && val.endsWith("'"))) {
      val = val.slice(1, -1);
    }
    env[key] = val;
  }
  return env;
}

const localEnv = readEnv();

module.exports = {
  apps: [{
    name: 'cshare-api',
    script: 'node_modules/.bin/tsx',
    args: 'src/server.ts',
    cwd: '/srv/CShare/backend',
    instances: 1,
    autorestart: true,
    watch: false,
    max_memory_restart: '400M',
    env: {
      NODE_ENV: process.env.NODE_ENV || localEnv.NODE_ENV || 'production',
      PORT: process.env.PORT || localEnv.PORT || '4001',
      DATA_DIR: process.env.DATA_DIR || localEnv.DATA_DIR || '/srv/CShare/data',
      PUBLIC_APP_URL: process.env.PUBLIC_APP_URL || localEnv.PUBLIC_APP_URL || 'https://file.asabbagh.com',
      FRONTEND_URL: process.env.FRONTEND_URL || localEnv.FRONTEND_URL || 'https://file.asabbagh.com',
      JWT_ACCESS_SECRET: process.env.JWT_ACCESS_SECRET || localEnv.JWT_ACCESS_SECRET,
      JWT_REFRESH_SECRET: process.env.JWT_REFRESH_SECRET || localEnv.JWT_REFRESH_SECRET,
      ADMIN_API_KEY: process.env.ADMIN_API_KEY || localEnv.ADMIN_API_KEY,
      GDRIVE_CLIENT_ID: process.env.GDRIVE_CLIENT_ID || localEnv.GDRIVE_CLIENT_ID,
      GDRIVE_CLIENT_SECRET: process.env.GDRIVE_CLIENT_SECRET || localEnv.GDRIVE_CLIENT_SECRET,
      GDRIVE_REFRESH_TOKEN: process.env.GDRIVE_REFRESH_TOKEN || localEnv.GDRIVE_REFRESH_TOKEN,
      GDRIVE_FOLDER_ID: process.env.GDRIVE_FOLDER_ID || localEnv.GDRIVE_FOLDER_ID,
    },
  }],
};