const Container = require('./src/container');
const winston = require('winston');
const express = require('express');

const AsyncFs = require('./src/asyncfs');
const DateTimeProvider = require('./src/datetimeprovider');
const ApiRoutes = require('./src/routes/api');
const NotificationRepository = require('./src/notification/repository');
const NotificationFacade = require('./src/notification/facade');
const TransportProvider = require('./src/transport/provider');
const SubjectParser = require('./src/subjectparser');
const ReminderScheduler = require('./src/reminderscheduler');


const logger = winston.createLogger({
  level: 'verbose',
});

logger.add(new winston.transports.Console({
  format: winston.format.simple()
}));


const container = new Container();
container.registerInstance('Logger', logger);
container.registerType('AsyncFs', AsyncFs);
container.registerType('DateTimeProvider', DateTimeProvider);
container.registerType('ApiRoutes', ApiRoutes);
container.registerType('NotificationRepository', NotificationRepository);
container.registerType('NotificationFacade', NotificationFacade);
container.registerType('TransportProvider', TransportProvider);
container.registerType('SubjectParser', SubjectParser);
container.registerType('ReminderScheduler', ReminderScheduler);


async function asyncMain()
{
  let config;

  if (await container.AsyncFs.exists('config.js'))
  {
    logger.verbose('Using config.js');
    config = require('./config.js');
  }
  else
  {
    logger.verbose('No config.js found, using config.default.js');
    config = require('./config.default.js');
  }


  container.registerInstance('Config', config);


  await container.NotificationRepository.init();
  container.ReminderScheduler.start();

  const app = express();


  const logMiddleware = (req, res, next) => 
  {
    // TODO merge with api.js' version
    const ip = req.headers['x-forwarded-for'] || req.ip;
    logger.verbose(`[${ip}] ${req.path} (body = ${JSON.stringify(req.body)})`);
    next()
  }
  
  app.use(express.json());
  app.use(express.urlencoded({ extended: false }));
  app.use(logMiddleware);

  app.use('/api', container.ApiRoutes.createRouter(express));
  app.use('/', express.static('frontend/dist'));

  app.listen(config.port, '0.0.0.0', () => 
  {
    logger.info(`NotificationLatch listening at http://localhost:${config.port}`);
  });
}


asyncMain()
  .catch(err =>
  {
    logger.error(`Unhandled exception: ${err}`);
    logger.verbose(err.stack);
  });