var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var mongodb = require('mongodb');
var MongoClient = mongodb.MongoClient;

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var leaderboardRouter = require('./routes/leaderboard');
var coinsRouter = require('./routes/coins');
const session = require('express-session');
var fileStore = require('session-file-store')(session);

var app = express();

app.use(session({
  secret: process.env.SESSION_SECRET || "session-login",
  resave: false,
  saveUninitialized: false,
  store: new fileStore({
    path: './sessions/',
    ttl: 24 * 60 * 60,
    reapInterval: 60 * 60
  }),
  cookie: {
    httpOnly: true,
    secure: process.env.NODE_ENV === 'production',
    maxAge: 24 * 60 * 60 * 1000,
  }
}));

async function connectDB(){
  var databaseUrl = process.env.DB_URL || "mongodb://localhost:27017/DegullMok";

  // MongoDB 연결
  try {
    const client = await MongoClient.connect(databaseUrl,{
      useNewUrlParser: true,
      useUnifiedTopology: true,
    });

    const db = client.db('DegullMok'); // 사용할 데이터베이스 선택
    app.set('database', db); // DB를 app에 저장
    console.log("Database Connected : " + databaseUrl);


    // 연결 종료 처리
    process.on("SIGINT", async ()=> {
      await client.close();
      console.log("Database Connected");
      process.exit(0);
    })
  } catch (err){
    console.error("DB 연결 실패: " + err);
    process.exit(1);
  }
}

connectDB().catch(err => {
  console.error("초기 DB 연결 실패: " + err);
  process.exit(1);
});

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/leaderboard', leaderboardRouter);
app.use('/coins', coinsRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;