from flask import flash, redirect, render_template, request, url_for
from flask_login import login_required, login_user, logout_user
from . import auth
from .. import db
from .forms import LoginForm, PasswordResetRequestForm, RegistrationForm
from ..email import send_email
from ..models import User


@auth.route('/login', methods=['GET', 'POST'])
def login():
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        if user is not None and user.verify_password(form.password.data):
            login_user(user, form.remember_me.data)
            next = request.args.get('next')
            if next is None or not next.startswith('/'):
                next = url_for('main.index')
            return redirect(next)
        flash('Invalid username or password.')
    return render_template('auth/login.html.j2', form=form, title='Log in')


@auth.route('/logout')
@login_required
def logout():
    logout_user()
    flash('You have been logged out.')
    return redirect(url_for('main.index'))


@auth.route('/register', methods=['GET', 'POST'])
def register():
    form = RegistrationForm()
    if form.validate_on_submit():
        user = User(email=form.email.data, username=form.username.data,
                    password=form.password.data)
        db.session.add(user)
        db.session.commit()
        flash('Successfully registered! You can now login.')
        return redirect(url_for('auth.login'))
    return render_template('auth/register.html.j2')


@auth.route('/reset', methods=['GET', 'POST'])
def password_reset_request():
    form = PasswordResetRequestForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data.lower()).first()
        if user:
            token = user.generate_reset_token()
            send_email(user.email, 'Reset Your Password',
                       'auth/email/reset_password',
                       user=user, token=token)
        flash('An email with instructions to reset your password has been '
              'sent to you.')
        return redirect(url_for('auth.login'))
    return render_template('auth/reset_password.html.j2', form=form, title='Password Reset')