from datetime import datetime
from flask import render_template, flash, redirect, url_for, abort
from flask_login import login_user, logout_user, current_user, login_required

from app import db
from app.auth import bp
from app.models import User
from app.auth.forms import LoginForm, RegistrationForm

@bp.route('/login', methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated:
        return redirect(url_for('main.index'))
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(name=form.username.data).first()
        if user is None or not user.check_password(form.password.data):
            flash('Invalid username or password')
            return redirect(url_for('auth.login'))
        login_user(user, remember=form.remember_me.data)
        user.last_login = datetime.utcnow()
        return redirect(url_for('main.index'))
    return render_template('auth/login.html', title='Sign In', form=form)

@bp.route('/logout')
@login_required
def logout():
    logout_user()
    return redirect(url_for('main.index'))

@bp.route('/register', methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('main.index'))
    form = RegistrationForm()
    if form.validate_on_submit():
        user = User(name=form.username.data)
        user.set_password(form.password.data)
        user.set_auth_hash()
        user.last_login = datetime.utcnow()
        db.session.add(user)
        db.session.commit()
        flash('Congratulations, you are now a registered user!')
        return redirect(url_for('auth.login'))
    return render_template('auth/register.html', title='Register', form=form)

@bp.route('/generate_auth_hash/<username>')
def generate_auth_hash(username):
    user = User.query.filter(User.name == username).first_or_404()
    if not current_user.owns_game_played_by(user):
        abort(403)
    if user.auth_hash:
        flash('Auth hash is already generated')
        abort(403)
    if user.last_login:
        flash('After a player has logged in, it is no longer possible to generate a QR code.')
        abort(403)
    user.set_auth_hash()
    db.session.commit()
    return 'nothing'