var mongoose = require("mongoose")
var uniqueValidator = require("mongoose-unique-validator");
var crypto = require("crypto");
var userSchema = new mongoose.Schema(
{
name : {
            type : String,
            required : [true , 'cant be blank'],
            unique : true,
            match : [/^[a-zA-Z0-9]+$/ , "is invalid"],
            index : true
        },
email : {
            type : String,
            unique : true,
            required : [true , 'cant be blank'],
            index : true
        },
salt : String,
password_hash : String
} , { timestamps : true });

userSchema.plugin(uniqueValidator , {message : "already taken"});

userSchema.methods.setPassword = function(password)
{
    this.salt = crypto.randomBytes(15).toString('hex');
    //console.log(this.salt);
    this.hash = crypto.pbkdf2Sync(password, this.salt, 10000, 512, 'sha512').toString('hex');

    //console.log(this.hash);
}
userSchema.methods.checkPassword = function(password)
{
var hash = crypto.pbkdf2Sync(password, this.salt, 10000, 512, 'sha512').toString('hex');
return this.hash == hash;
}

var  User = module.exports = mongoose.model("User" , userSchema);

//route for Signup


router.get("/signup" , function(req,res)
{
res.render('signup.html');
});
router.post('/signup' , function(req,res)
{
var name = req.body.name;
var email = req.body.email;
var password = req.body.password;
var verify = req.body.verify;
if(!name || !email || !password || !verify || password != verify)
{
    var passwordError;
    if(password != verify)
        passwordError = 'Password are not matching';
    res.render('signup.html' , { 'Error' : 'Invalid Details' , 'name' : name , 'email' : email , 'passwordError' : passwordError});
    return;
}

var newUser = User(
{
    name : name,
    email : email

});
newUser.setPassword(password);
newUser.save(function(err)
{
    if(err)
    {
        //console.log("Database Error:%s" , err);
        console.log(err);
        // Even after using return statement the code below this
        // statement is being executed . I dont know why?
        return res.status(500).send({success : false , message : 'User already exists'});
    }

});
console.log("here");

req.session.user = newUser;
console.log(newUser);
res.redirect('/newpost');
});