# -*- coding: UTF-8 -*
"""
auth.routes.py
"""

import flask
from flask import current_app, flash, render_template
from flask import redirect, url_for, request
from flask_login import login_user, logout_user, current_user
from sqlalchemy import func

from app import db
from app.auth import bp
from app.auth.forms import (
    LoginForm,
    UserCreationForm,
    ResetPasswordRequestForm,
    ResetPasswordForm,
)
from app.auth.models import Role
from app.auth.models import User
from app.auth.email import send_password_reset_email
from app.decorators import admin_required
from app.models.config import ScoDocSiteConfig

_ = lambda x: x  # sans babel
_l = _


@bp.route("/login", methods=["GET", "POST"])
def login():
    "ScoDoc Login form"
    if current_user.is_authenticated:
        return redirect(url_for("scodoc.index"))

    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(user_name=form.user_name.data).first()
        if user is None or not user.check_password(form.password.data):
            current_app.logger.info("login: invalid (%s)", form.user_name.data)
            flash(_("Nom ou mot de passe invalide"))
            return redirect(url_for("auth.login"))
        login_user(user, remember=form.remember_me.data)
        current_app.logger.info("login: success (%s)", form.user_name.data)
        return form.redirect("scodoc.index")
    message = request.args.get("message", "")
    return render_template(
        "auth/login.j2",
        title=_("Sign In"),
        form=form,
        message=message,
        is_cas_enabled=ScoDocSiteConfig.is_cas_enabled(),
    )


@bp.route("/logout")
def logout() -> flask.Response:
    "Logout a scodoc user. If CAS session, logout from CAS. Redirect."
    current_app.logger.info(f"logout user {current_user.user_name}")
    logout_user()
    if ScoDocSiteConfig.is_cas_enabled() and flask.session.get("scodoc_cas_login_date"):
        flask.session.pop("scodoc_cas_login_date", None)
        return redirect(url_for("cas.logout"))
    return redirect(url_for("scodoc.index"))


@bp.route("/create_user", methods=["GET", "POST"])
@admin_required
def create_user():
    "Form creating new user"
    form = UserCreationForm()
    if form.validate_on_submit():
        user = User(user_name=form.user_name.data, email=form.email.data)
        user.set_password(form.password.data)
        db.session.add(user)
        db.session.commit()
        flash(f"Utilisateur {user.user_name} créé")
        return redirect(url_for("scodoc.index"))
    return render_template("auth/register.j2", title="Création utilisateur", form=form)


@bp.route("/reset_password_request", methods=["GET", "POST"])
def reset_password_request():
    """Form demande renvoi de mot de passe par mail
    Si l'utilisateur est déjà authentifié, le renvoie simplement sur
    la page d'accueil.
    """
    if current_user.is_authenticated:
        return redirect(url_for("scodoc.index"))
    form = ResetPasswordRequestForm()
    if form.validate_on_submit():
        users = User.query.filter(
            func.lower(User.email) == func.lower(form.email.data)
        ).all()
        if len(users) == 1:
            send_password_reset_email(users[0])
        elif len(users) > 1:
            current_app.logger.info(
                f"reset_password_request: multiple users with email '{form.email.data}' (ignoring)"
            )
        else:
            current_app.logger.info(
                f"reset_password_request: for unkown user '{form.email.data}'"
            )
        flash(
            _("Voir les instructions envoyées par mail (pensez à regarder vos spams)")
        )
        return redirect(url_for("auth.login"))
    return render_template(
        "auth/reset_password_request.j2", title=_("Reset Password"), form=form
    )


@bp.route("/reset_password/<token>", methods=["GET", "POST"])
def reset_password(token):
    "Reset password après demande par mail"
    if current_user.is_authenticated:
        return redirect(url_for("scodoc.index"))
    user: User = User.verify_reset_password_token(token)
    if user is None:
        return redirect(url_for("scodoc.index"))
    form = ResetPasswordForm()
    if form.validate_on_submit():
        user.set_password(form.password.data)
        db.session.commit()
        flash(_("Votre mot de passe a été changé."))
        return redirect(url_for("auth.login"))
    return render_template("auth/reset_password.j2", form=form, user=user)


@bp.route("/reset_standard_roles_permissions", methods=["GET", "POST"])
@admin_required
def reset_standard_roles_permissions():
    "Réinitialise (recrée au besoin) les rôles standards de ScoDoc et leurs permissions"
    Role.reset_standard_roles_permissions()
    flash("rôles standards réinitialisés !")
    return redirect(url_for("scodoc.configuration"))