// Passport login LocalStrategy
passport.use('login', new LocalStrategy({
    passReqToCallback : true
}, function(req, username, password, done) {
    // check in mongo if a user with username exists or not
    User.findOne({ 'username' :  username },
        function(err, user) {
            // In case of any error, return using the done method
            if (err)
                return done(err);
            // Username does not exist, log error & redirect back
            if (!user){
                console.log('User Not Found with username '+username);
                return done(null, false,
                    req.flash('message', 'User Not found.'));
            }
            // User exists but wrong password, log the error
            if (!user.validPassword(password)){
                console.log('Invalid Password');
                return done(null, false,
                    req.flash('message', 'Invalid Password'));
            }
            // User and password both match, return user from
            // done method which will be treated like success
            return done(null, user);
        }
    );
}));

passport.use('signup', new LocalStrategy({
        passReqToCallback : true
    },
    function(req, username, password, done) {
        findOrCreateUser = function(){
            // find a user in Mongo with provided username
            User.findOne({'username':username},function(err, user) {
                // In case of any error return
                if (err){
                    console.log('Error in SignUp: '+err);
                    return done(err);
                }
                // already exists
                if (user) {
                    console.log('User already exists');
                    return done(null, false,
                        req.flash('message','User Already Exists'));
                } else {
                    // if there is no user with that email
                    // create the user
                    var newUser = new User();
                    // set the user's local credentials
                    newUser.username = username;
                    newUser.password = password;
                    newUser.email = req.param('email');
                    // save the user
                    newUser.save(function(err) {
                        if (err){
                            console.log('Error in Saving user: '+err);
                            throw err;
                        }
                        console.log('User Registration succesful');
                        return done(null, newUser);
                    });
                }
            });
        };
    process.nextTick(findOrCreateUser);
}));

var mongoose = require("mongoose");

var UserSchema = new mongoose.Schema({
    username: String,
    email:  String,
    password: String,
    friends: [this]
});
UserSchema.methods.validPassword = function (pwd) {
    return (this.password === pwd);
}

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