from flask import Blueprint

from flask import render_template, redirect, request, session, flash
from controllers.database.user import UserController
from models.users.customer import Customer
from hashlib import sha512

# Blueprint to append user endpoints to
blueprint = Blueprint("users", __name__)

### LOGIN FUNCTIONALITY
# Function responsible for delivering the Login page for the site
@blueprint.route('/login')
def display_login():
    return render_template('index.html', content="login.html", user = session.get('user'))

# Function responsible for handling logins to the site
@blueprint.post('/login')
def login():
    database = UserController()
    user = database.read(request.form['username'])
    error = None

    # No user found
    if user == None:
        error = "No user found with the username " + request.form['username']
        flash(error)
        return redirect("/login")
    
    # Incorrect Password
    if sha512(request.form['password'].encode()).hexdigest() != user.password:
        error = "Incorrect Password"
        flash(error)
        return redirect("/login")

    session['user'] = user.username
    return redirect("/")


### SIGNUP FUNCTIONALITY
# Function responsible for delivering the Signup page for the site
@blueprint.route('/signup')
def display_signup():
    return render_template('index.html', content="signup.html", user = session.get('user'))

# Function responsible for handling signups to the site
@blueprint.post('/signup')
def signup():
    database = UserController()

    # User already exists
    if database.read(request.form['username']) != None:
        error = "User, " + request.form['username'] + " already exists"
        flash(error)
        return redirect("/signup")

    database.create(Customer(
        0,
        request.form['username'],
        sha512(request.form['password'].encode()).hexdigest(), # Hashed as soon as it is recieved on the backend
        request.form['firstname'],
        request.form['lastname'],
        request.form['email'],
        "123",
        "Customer"
    ))

    # Code 307 Preserves the original request (POST)
    return redirect("/login", code=307)


### SIGN OUT FUNCTIONALITY
# Function responsible for handling logouts from the site
@blueprint.route('/logout')
def logout():
    session.pop('user')
    return redirect("/")