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

from . import bp
from .forms import LoginForm
from ..models import User


@bp.route("/login", methods=["GET", "POST"])
def login():
    if current_user.is_authenticated:
        return redirect(url_for("devices.list_devices"))

    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(username=form.username.data).first()
        if user is None or not user.check_password(form.password.data) or not user.is_active_user:
            flash("Invalid username or password.", "danger")
            return render_template("auth/login.html", form=form)
        login_user(user)
        next_page = request.args.get("next")
        return redirect(next_page or url_for("devices.list_devices"))

    return render_template("auth/login.html", form=form)


@bp.route("/logout")
@login_required
def logout():
    logout_user()
    flash("You have been logged out.", "info")
    return redirect(url_for("auth.login"))