// load modules
const express = require('express');
const bodyParser = require('body-parser');
const expressHandlebars = require('express-handlebars');
const Handlebars = require('handlebars');
const helmet = require('helmet');
const cookieSession = require('cookie-session');
const http = require('http');
const logger = require('winston');
const Path = require('path');

// load local modules
const requestLogger = require('./server/middleware/requestLogger.js');
const siteConfig = require('@config/siteConfig.js');
const PORT = siteConfig.details.port;
const createDatabaseIfNotExists = require('./server/models/utils/createDatabaseIfNotExists.js');
const { getWalletBalance } = require('./server/lbrynet');
const db = require('./server/models');

// configure logging
const configureLogging = require('./server/utils/configureLogging.js');
configureLogging();

// configure slack logging
const configureSlack = require('./server/utils/configureSlack.js');
configureSlack();

/* create app */
const app = express();

// trust the proxy to get ip address for us
app.enable('trust proxy');

// set HTTP headers to protect against well-known web vulnerabilties
app.use(helmet());

// 'express.static' to serve static files from public directory
const publicPath = Path.resolve(process.cwd(), 'public');
app.use(express.static(publicPath));
logger.info(`serving static files from default static path at ${publicPath}.`);

// 'body parser' for parsing application/json
app.use(bodyParser.json());

// 'body parser' for parsing application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: true }));

// add custom middleware (note: build out to accept dynamically use what is in server/middleware/
app.use(requestLogger);

// configure passport
const speechPassport = require('./server/speechPassport/index');

// initialize passport
const sessionKey = siteConfig.auth.sessionKey;
app.use(cookieSession({
  name  : 'session',
  keys  : [sessionKey],
}));
app.use(speechPassport.initialize());
app.use(speechPassport.session());

// configure handlebars & register it with express app
const hbs = expressHandlebars.create({
  defaultLayout: 'embed',
  handlebars   : Handlebars,
});
app.engine('handlebars', hbs.engine);
app.set('view engine', 'handlebars');

// set the routes on the app
require('./server/routes/auth/index')(app);
require('./server/routes/api/index')(app);
require('./server/routes/pages/index')(app);
require('./server/routes/assets/index')(app);
require('./server/routes/fallback/index')(app);

/* create server */
const server = http.Server(app);

/* start the server */

const startServer = () => {
  return createDatabaseIfNotExists()
    .then(() => {
      return getWalletBalance();
    })
    .then(balance => {
      logger.info('starting LBC balance:', balance);
      db.sequelize.sync();
      server.listen(PORT, () => {
        logger.info(`Server is listening on PORT ${PORT}`);
      });
    })
    .catch(error => {
      if (error.code === 'ECONNREFUSED') {
        return logger.error('Connection refused.  The daemon may not be running.')
      } else if (error.message) {
        logger.error(error.message);
      }
      logger.error(error);
    });
};

module.exports = startServer;