app.js

require('dotenv').config();
const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const session = require('express-session');
const flash = require('connect-flash');
const mongoose = require('mongoose');
const passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;

// Routers
const indexRouter = require('./routes/index');
const usersRouter = require('./routes/users');

// User model
const User = require('./routes/users'); 


// App init
const app = express();

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

// Middleware
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('/uploads', express.static(path.join(__dirname, 'uploads')));

// Session setup
app.use(session({
  secret: process.env.SESSION_SECRET,
  resave: false,
  saveUninitialized: false
}));

app.use((req, res, next) => {
  res.locals.currentUser = req.user
  next()
})
// Flash messages
app.use(flash());

app.use((req, res, next) => {
  res.locals.currentUser = req.user;
  res.locals.messages = req.flash();
  next();
});

// Passport setup
app.use(passport.initialize());
app.use(passport.session());

passport.use(new LocalStrategy(User.authenticate()));
passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());

// Routes
app.use('/', indexRouter);
app.use('/users', usersRouter);

// MongoDB connection
mongoose.connect(process.env.MONGODB_URI, {
  useNewUrlParser: true,
  useUnifiedTopology: true
})
.then(() => console.log('MongoDB connected'))
.catch(err => console.log('MongoDB connection error:', err));

// Catch 404
app.use(function(req, res, next) {
  next(createError(404));
});


// Error handler
app.use(function(err, req, res, next) {
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};
  res.status(err.status || 500);
  res.render('error');
});

app.use((req, res, next) => {
  res.locals.adminUpi = process.env.ADMIN_UPI_ID || 'admin@upi';
  next();
});


module.exports = app;