import datetime
import uuid

from canaille.flaskutils import user_needed
from canaille.oidc.models import Client
from canaille.oidc.models import Consent
from flask import Blueprint
from flask import flash
from flask import redirect
from flask import url_for
from flask_babel import gettext as _
from flask_themer import render_template

from .utils import SCOPE_DETAILS


bp = Blueprint("consents", __name__, url_prefix="/consent")


@bp.route("/")
@user_needed()
def consents(user):
    consents = Consent.filter(subject=user.dn)
    client_dns = {t.client for t in consents}
    clients = {dn: Client.get(dn) for dn in client_dns}
    preconsented = [
        client
        for client in Client.filter()
        if client.preconsent and client.dn not in clients
    ]

    return render_template(
        "oidc/user/consent_list.html",
        consents=consents,
        clients=clients,
        menuitem="consents",
        scope_details=SCOPE_DETAILS,
        ignored_scopes=["openid"],
        preconsented=preconsented,
    )


@bp.route("/revoke/<consent_id>")
@user_needed()
def revoke(user, consent_id):
    consent = Consent.get(consent_id)

    if not consent or consent.subject != user.dn:
        flash(_("Could not revoke this access"), "error")

    elif consent.revokation_date:
        flash(_("The access is already revoked"), "error")

    else:
        consent.revoke()
        flash(_("The access has been revoked"), "success")

    return redirect(url_for("oidc.consents.consents"))


@bp.route("/restore/<consent_id>")
@user_needed()
def restore(user, consent_id):
    consent = Consent.get(consent_id)

    if not consent or consent.subject != user.dn:
        flash(_("Could not restore this access"), "error")

    elif not consent.revokation_date:
        flash(_("The access is not revoked"), "error")

    else:
        consent.restore()
        if not consent.issue_date:
            consent.issue_date = datetime.datetime.now()
        consent.save()
        flash(_("The access has been restored"), "success")

    return redirect(url_for("oidc.consents.consents"))


@bp.route("/revoke-preconsent/<client_id>")
@user_needed()
def revoke_preconsent(user, client_id):
    client = Client.get(client_id)

    if not client or not client.preconsent:
        flash(_("Could not revoke this access"), "error")
        return redirect(url_for("oidc.consents.consents"))

    consent = Consent.get(client=client.dn, subject=user.dn)
    if consent:
        return redirect(url_for("oidc.consents.revoke", consent_id=consent.cn[0]))

    consent = Consent(
        cn=str(uuid.uuid4()),
        client=client.dn,
        subject=user.dn,
        scope=client.scope,
    )
    consent.revoke()
    consent.save()
    flash(_("The access has been revoked"), "success")

    return redirect(url_for("oidc.consents.consents"))