def get_hashed_password(plain_text_password):

    return bcrypt.hashpw(plain_text_password, bcrypt.gensalt())


def check_password(plain_text_password, hashed_password):

    return bcrypt.checkpw(plain_text_password, hashed_password)


@app.route('/login')
def login_form():

    return render_template('login_page.html')


@app.route('/login', methods=['POST'])
def login_process():

    # Users may use email OR username to log in
    username = request.form.get('login_id') #jhacks
    password = request.form.get('password') #jhacks

    user = User.query.filter(User.email == username).first()

    if not user:
        user = User.query.filter(User.username == username).first()
        print("User doesn't exist")

    if user:
        if len(password) > 8 & len(password) < 17:
            check_pw = check_password(password, user.password)
            # if password = hashed_password
            if check_pw:
            # if user.password == password:
                print("Password matches username!")
                flash("You are now logged in!")
                session['user_id'] = user.user_id # saves to session
                # return redirect('/users/{}'.format(user.user_id))
                return redirect('/users/my_page')
                # Redirect here instead for personal feed
            # elif user.password == None:
            #     return redirect('/')

        else:
            print("Please enter a password between 8-16 characters!")
            return redirect('/')
            # This happens when username typed, password blank

    else:
        print("User not found! Please try again, or register.")
        return redirect('/')


@app.route('/register', methods=['GET'])
def registration_form():

    return render_template('register_page.html')

@app.route('/register', methods=['POST'])
def registration_process():

    username = request.form.get('reg_username')
    email = request.form.get('reg_email')
    password = request.form.get('reg_pw')
    hashed_pw = get_hashed_password(password)
    regex_email = re.findall(r'[^@]+@[^@]+\.[^@]+', email)
    #doesn't handle the case of spaces

    # check to make sure user doesn't already exist before
    # allowing new entry to be made in DB

    regex_username = re.match("^[a-zA-Z0-9_.-]+$", username)
    # must be alphanumeric
    # Returns none if strange characters entered or space in name
    # Returns match object if matching string

    # if regex_username == None: # if it's something

    # if len(password) > 8 & len(password) < 17:
    #     valid_password = password

    fname = request.form.get('reg_fname')
    lname = request.form.get('reg_lname')

    # Check that user var matches an entry in db
    user = User.query.filter(User.email == email).first()

    if user == None: # If user doesn't exist in db
        # if regex_email: # if regex_username is valid
        # Add user to db
        print("User added!")
        flash("User added!")
        print(regex_username) # evaluated to none when "sdfosdijf  e9" entered
        if regex_username is not None:
            print("REGEX USERNAME: ")
            print(regex_username)
            print("Username alphanumeric!")
            flash("Username alphanumeric!")
        # make sure password also valid
        # if username.isalnum() == True:
            print("REGEX EMAIL: ")
            print(regex_email)
            if regex_email is not None:
                print("Regex'd email is valid!")
        # user = User(username=username, password=hashed_pw, email=email, fname=fname, lname=lname)
                user = User(username=username, password=hashed_pw, email=email, fname=fname, lname=lname)
                db.session.add(user)
                db.session.commit()
                session['user_id'] = user.user_id

        else:
            print("One or more fields are invalid! Please try again.")
            return redirect('/register')
    else: # user already exists in db
        print("This user already exists! Please log in.")
        flash("This user already exists! Please log in.")

    flash("You are now registered! Please enjoy all of our features.")
    return redirect('/')


@app.route('/logout')
def logout_process():
    """Logs user out from website"""
    del session['user_id']
    return redirect('/')