# external libraries
from flask import Blueprint, render_template, redirect, url_for, flash, request
from flask_login import login_user, login_required, logout_user
from werkzeug.security import generate_password_hash, check_password_hash

# internal code
from . import db

auth = Blueprint('auth', __name__)

@auth.route('/login', methods=["GET", "POST"])
def login():
    if request.method == "GET":
        return render_template("login.html")
    elif request.method == "POST":
        email = request.form.get('email')
        password = request.form.get('password')
        remember = True if request.form.get('remember') else False

        user = db.get_user(email)
        if not user or not check_password_hash(user.password, password):
            flash('Please check your login details and try again.')
            return redirect(url_for('auth.login')) 

        login_user(user, remember=remember)
        return redirect(url_for('main.home'))


@auth.route('/signup', methods=["GET", "POST"])
def signup():
    if request.method == "GET":
        return render_template("signup.html")
    elif request.method == "POST":
        # code to validate and add user to database goes here
        email = request.form.get('email')
        name = request.form.get('name')
        password = request.form.get('password')

        if db.get_user(email):
            flash('Email address already exists')
            return redirect(url_for('auth.signup'))

        db.add_user(email=email, name=name, password=generate_password_hash(password, method='pbkdf2:sha256'))
        return redirect(url_for('auth.login'))

@auth.route('/logout', methods=["GET"])
@login_required
def logout():
    logout_user()
    return redirect(url_for("main.home"))