from flask import render_template, redirect, url_for, flash, request
from flask_login import login_user, logout_user, current_user
from app.extensions import db
from app.blueprints.auth import bp
from app.blueprints.auth.forms import LoginForm, RegisterForm
from app.models.user import User


@bp.route('/login', methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated:
        return redirect(url_for('index'))
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        if user and user.check_password(form.password.data):
            login_user(user)
            next_page = request.args.get('next')
            return redirect(next_page or url_for('index'))
        flash('Invalid email or password.', 'error')
    return render_template('login.html', form=form)


@bp.route('/register', methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('index'))
    form = RegisterForm()
    if form.validate_on_submit():
        user = User(email=form.email.data, name=form.name.data,
                    institution=form.institution.data)
        user.set_password(form.password.data)
        db.session.add(user)
        db.session.commit()
        flash('Registration successful. Please log in.', 'success')
        return redirect(url_for('auth.login'))
    return render_template('register.html', form=form)


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