# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2017-2019 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later

from datetime import datetime

from authlib.integrations.django_client import OAuth
from django.conf import settings
from django.contrib.auth.models import AbstractUser
from django.db import models
from django.utils import timezone
from django.utils.translation import gettext_lazy as _
from med.settings import MAX_EMPRUNT


class User(AbstractUser):
    telephone = models.CharField(
        verbose_name=_('phone number'),
        max_length=15,
        blank=True,
    )
    address = models.CharField(
        verbose_name=_('address'),
        max_length=255,
        blank=True,
    )
    maxemprunt = models.IntegerField(
        verbose_name=_('maximum borrowed'),
        help_text=_('Maximal amount of simultaneous borrowed item '
                    'authorized.'),
        default=MAX_EMPRUNT,
    )
    comment = models.CharField(
        verbose_name=_('comment'),
        help_text=_('Promotion...'),
        max_length=255,
        blank=True,
    )
    date_joined = models.DateTimeField(
        _('date joined'),
        default=timezone.now,
        null=True,
    )

    REQUIRED_FIELDS = ['first_name', 'last_name', 'email']

    @property
    def is_member(self):
        # FIXME Use NK20
        return True


class AccessToken(models.Model):
    owner = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        null=True,
        default=None,
        verbose_name=_('owner'),
    )

    access_token = models.CharField(
        max_length=32,
        verbose_name=_('access token'),
    )

    expires_in = models.PositiveSmallIntegerField(
        verbose_name=_('expires in'),
    )

    scopes = models.CharField(
        max_length=255,
        verbose_name=_('scopes'),
    )

    refresh_token = models.CharField(
        max_length=32,
        verbose_name=_('refresh token'),
    )

    expires_at = models.DateTimeField(
        verbose_name=_('expires at'),
    )

    def refresh(self):
        """
        Refresh the access token.
        """
        oauth = OAuth()
        oauth.register('notekfet')
        # Get the OAuth client
        oauth_client = oauth.notekfet._get_oauth_client()
        # Actually refresh the token
        token = oauth_client.refresh_token(oauth.notekfet.access_token_url,
                                           refresh_token=self.refresh_token)
        self.access_token = token['access_token']
        self.expires_in = token['expires_in']
        self.scopes = token['scope']
        self.refresh_token = token['refresh_token']
        self.expires_at = timezone.utc.fromutc(
            datetime.fromtimestamp(token['expires_at'])
        )

        self.save()

    class Meta:
        verbose_name = _('access token')
        verbose_name_plural = _('access tokens')