import * as http from 'http';
import {log} from './logger/logger';
import {appConfig} from './config/app-config';
import {database} from './db';
import {router} from '@tsmean/router';

export function main() {

// Step 1) Set & Get App Configuration
  appConfig.setAppConfig(process.argv[2] || 'local');

// Step 2) Connect to the database
  (<any>database()).database.connectToDatabase(appConfig.appConfig.db, (db) => {

    // when connected to db:

    // Step 3) Set Port for router
    const normalizePort = (val: number|string): number|string|boolean => {
      const port: number = (typeof val === 'string') ? parseInt(val, 10) : val;
      if (isNaN(port)) {
        return val;
      } else if (port >= 0) {
        return port;
      } else {
        return false;
      }
    };

    const port = normalizePort(process.env.PORT || 4242);
    router.set('port', port);
    const server = http.createServer(router);

    // Step 4) Handle Errors
    const onError = (error: NodeJS.ErrnoException): void => {
      if (error.syscall !== 'listen') {
        throw error;
      }
      const bind = (typeof port === 'string') ? 'Pipe ' + port : 'Port ' + port;
      switch (error.code) {
        case 'EACCES':
          console.error(`${bind} requires elevated privileges`);
          process.exit(1);
          break;
        case 'EADDRINUSE':
          console.error(`${bind} is already in use`);
          process.exit(1);
          break;
        default:
          throw error;
      }
    };
    const onListening = (): void => {
      const addr = server.address();
      const bind = (typeof addr === 'string') ? `pipe ${addr}` : `port ${addr.port}`;
    };
    server.on('error', onError);
    server.on('listening', onListening);

    server.listen(port, function(){
      log.info('Server listening at port %d', port);
    });

  });

};

main()