const fs = require('fs');
const apps = [];
let nginxConfig = "server {\n\tlisten 7860;\n";

Object.keys(process.env)
  .filter(key => key.startsWith('SECRET_API_ENDPOINT_'))
  .forEach(key => {
    const i = key.split('_').pop();
    const workerKey = `SECRET_WORKER_CONCURRENCY_${i}`;
    const apiEndpoint = process.env[key];
    const workerConcurrency = process.env[workerKey];

    if (apiEndpoint && workerConcurrency) {
      apps.push({
        name: `app${i}`,
        script: 'app.js',
        instances: 1,
        env: {
          PORT: 3000 + parseInt(i),
          API_ENDPOINT: apiEndpoint,
          WORKER_CONCURRENCY: workerConcurrency
        }
      });

      // Add an NGINX config for this app
      nginxConfig += `\tlocation /app${i} {\n\t\tproxy_pass http://localhost:${3000 + parseInt(i)};\n\t}\n`;
    }
  });

nginxConfig += "}\n";

const config = {
  apps
};

fs.writeFileSync('ecosystem.config.js', `module.exports = ${JSON.stringify(config, null, 2)};`);
fs.writeFileSync('default.conf', nginxConfig);