app.js

if(process.env.NODE_ENV != "production"){
    require("dotenv").config();
}
// console.log(process.env.SECRET);

const express = require("express");
const app = express();
const mongoose = require("mongoose");
// const Listing = require("./models/listing.js");
const path = require("path");
const methodOverride = require("method-override");
const ejsMate = require("ejs-mate");
// const wrapAsync = require("./utils/wrapAsync.js");
const ExpressError = require("./utils/ExpressError.js");
// const {listingSchema, reviewSchema} = require("./schema.js");
// const Review = require("./models/review.js");
const session = require("express-session");

const MongoStore = require('connect-mongo');

const flash = require("connect-flash");
const passport = require("passport");
const LocalStrategy = require("passport-local");
const User = require("./models/user.js");

const listingsRouter = require("./routes/listing.js");
const reviewsRouter = require("./routes/review.js");
const userRouter = require("./routes/user.js");


// const MONGO_URL = "mongodb://127.0.0.1:27017/wanderlust";
const dbUrl = process.env.ATLASDB_URL;


main()
    .then(()=>{
    console.log("connected to DB.");
    })
    .catch((err)=>{
    console.log(err);
    });

async function main() {
    // await mongoose.connect(MONGO_URL);    
    await mongoose.connect(dbUrl);    
}

app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "views"));
app.use(express.urlencoded({extended: true}));
app.use(methodOverride("_method"));
app.engine("ejs", ejsMate);
app.use(express.static(path.join(__dirname, "/public")));

const store = MongoStore.create({
    mongoUrl: dbUrl,
    crypto: {
        secret: process.env.SECRET,
    },
    touchAfter: 24 * 3600,
});

store.on("error", ()=>{
    console.log("ERROR IN MONGO SESSION STORE", err);
});

const sessionOptions = {
    store,
    secret: process.env.SECRET,
    resave: false,
    saveUninitialized:true,
    cookie: {
        expires: Date.now() + 7 * 24 * 60 * 60 * 1000,
        maxAge: 7 * 24 * 60 * 60 * 1000,
        httpOnly: true,
    },
};

// app.get("/", (req,res)=>{
//     res.send("Hi, I'm root.");
// });


app.use(session(sessionOptions));
app.use(flash());

app.use(passport.initialize());
app.use(passport.session());
passport.use(new LocalStrategy(User.authenticate()));

passport.serializeUser(User.serializeUser()); //for storing
passport.deserializeUser(User.deserializeUser()); //for destoring login credentials.

app.use((req,res,next)=>{

    res.locals.currUser = req.user; // Make req available to all views so that req.user should work

    res.locals.success = req.flash("success");
    // console.log(res.locals.success); //array
    res.locals.error = req.flash("error");
    next();
});

// app.get("/demouser", async(req,res)=>{
//     let fakeUser = new User({
//         email: "student@gmail.com",
//         username: "Vaishali",
//     });

//     let registeredUser = await User.register(fakeUser, "helloworld");
//     res.send(registeredUser);
// });

//validateListing
//validateReview

app.use("/listings", listingsRouter);
app.use("/listings/:id/reviews", reviewsRouter);
app.use("/", userRouter);


// app.get("/testListing", async(req,res)=>{
//     let sampleListing = new Listing({
//         title: "My New Villa",
//         description: "By the beach",
//         price: 1200,
//         location: "Calangute, Goa",
//         country: "India",
//     });
//     await sampleListing.save();
//     console.log("sample was saved.");
//     res.send("successful testing");
// });

app.all("*", (req,res,next)=>{
    next(new ExpressError (404, "Page Not Found!"));
});

app.use((err,req,res,next)=>{
    let {statusCode=500, message="Something went wrong!"} = err;
    // res.render("error.ejs", {err});
    res.status(statusCode).render("error.ejs", {message});
    // res.status(statusCode).send(message);
    // res.send("something went wrong!");
});

app.listen(8080, ()=>{
    console.log("server is listening to port 8080");
});