import json
import os
from datetime import timedelta
from unittest import mock
from urllib.parse import urlencode

from django.conf import settings
from django.contrib.auth.models import User
from django.core.management import call_command
from django.test import Client, TestCase
from django.utils import timezone

from ..models import CategorieSpectacle, Salle, Spectacle, Tirage


def create_user(username, is_cof=False, is_buro=False):
    user = User.objects.create_user(username=username, password=username)
    user.profile.is_cof = is_cof
    user.profile.is_buro = is_buro
    user.profile.save()
    return user


def user_is_cof(user):
    return (user is not None) and user.profile.is_cof


def user_is_staff(user):
    return (user is not None) and user.profile.is_buro


class BdATestHelpers:
    def setUp(self):
        # Some user with different access privileges
        staff = create_user(username="bda_staff", is_cof=True, is_buro=True)
        staff_c = Client()
        staff_c.force_login(staff)

        member = create_user(username="bda_member", is_cof=True)
        member_c = Client()
        member_c.force_login(member)

        other = create_user(username="bda_other")
        other_c = Client()
        other_c.force_login(other)

        self.client_matrix = [
            (staff, staff_c),
            (member, member_c),
            (other, other_c),
            (None, Client()),
        ]

    def require_custommails(self):
        data_file = os.path.join(
            settings.BASE_DIR, "gestioncof", "management", "data", "custommail.json"
        )
        call_command("syncmails", data_file, verbosity=0)

    def check_restricted_access(
        self, url, validate_user=user_is_cof, redirect_url=None
    ):
        def craft_redirect_url(user):
            if redirect_url:
                return redirect_url
            elif user is None:
                # client is not logged in
                login_url = "/login"
                if url:
                    login_url += "?{}".format(urlencode({"next": url}, safe="/"))
                return login_url
            else:
                return "/"

        for (user, client) in self.client_matrix:
            resp = client.get(url, follow=True)
            if validate_user(user):
                self.assertEqual(200, resp.status_code)
            else:
                self.assertRedirects(resp, craft_redirect_url(user))


class TestBdAViews(BdATestHelpers, TestCase):
    def setUp(self):
        # Signals handlers on login/logout send messages.
        # Due to the way the Django' test Client performs login, this raise an
        # error. As workaround, we mock the Django' messages module.
        patcher_messages = mock.patch("gestioncof.signals.messages")
        patcher_messages.start()
        self.addCleanup(patcher_messages.stop)
        # Set up the helpers
        super().setUp()
        # Some BdA stuff
        self.tirage = Tirage.objects.create(
            title="Test tirage",
            appear_catalogue=True,
            ouverture=timezone.now(),
            fermeture=timezone.now(),
        )
        self.category = CategorieSpectacle.objects.create(name="Category")
        self.location = Salle.objects.create(name="here")
        Spectacle.objects.bulk_create(
            [
                Spectacle(
                    title="foo",
                    date=timezone.now(),
                    location=self.location,
                    price=0,
                    slots=42,
                    tirage=self.tirage,
                    listing=False,
                    category=self.category,
                ),
                Spectacle(
                    title="bar",
                    date=timezone.now(),
                    location=self.location,
                    price=1,
                    slots=142,
                    tirage=self.tirage,
                    listing=False,
                    category=self.category,
                ),
                Spectacle(
                    title="baz",
                    date=timezone.now(),
                    location=self.location,
                    price=2,
                    slots=242,
                    tirage=self.tirage,
                    listing=False,
                    category=self.category,
                ),
            ]
        )

    def test_bda_inscriptions(self):
        # TODO: test the form
        url = "/bda/inscription/{}".format(self.tirage.id)
        self.check_restricted_access(url)

    def test_bda_places(self):
        url = "/bda/places/{}".format(self.tirage.id)
        self.check_restricted_access(url)

    def test_etat_places(self):
        url = "/bda/etat-places/{}".format(self.tirage.id)
        self.check_restricted_access(url)

    def test_perform_tirage(self):
        # Only staff member can perform a tirage
        url = "/bda/tirage/{}".format(self.tirage.id)
        self.check_restricted_access(url, validate_user=user_is_staff)

        _, staff_c = self.client_matrix[0]
        # Cannot be performed if disabled
        self.tirage.enable_do_tirage = False
        self.tirage.save()
        resp = staff_c.get(url)
        self.assertTemplateUsed(resp, "tirage-failed.html")
        # Cannot be performed if registrations are still open
        self.tirage.enable_do_tirage = True
        self.tirage.fermeture = timezone.now() + timedelta(seconds=3600)
        self.tirage.save()
        resp = staff_c.get(url)
        self.assertTemplateUsed(resp, "tirage-failed.html")
        # Otherwise, perform the tirage
        self.tirage.fermeture = timezone.now()
        self.tirage.save()
        resp = staff_c.get(url)
        self.assertTemplateNotUsed(resp, "tirage-failed.html")

    def test_spectacles_list(self):
        url = "/bda/spectacles/{}".format(self.tirage.id)
        self.check_restricted_access(url, validate_user=user_is_staff)

    def test_spectacle_detail(self):
        show = self.tirage.spectacle_set.first()
        url = "/bda/spectacles/{}/{}".format(self.tirage.id, show.id)
        self.check_restricted_access(url, validate_user=user_is_staff)

    def test_tirage_unpaid(self):
        url = "/bda/spectacles/unpaid/{}".format(self.tirage.id)
        self.check_restricted_access(url, validate_user=user_is_staff)

    def test_send_reminders(self):
        self.require_custommails()
        # Just get the page
        show = self.tirage.spectacle_set.first()
        url = "/bda/mails-rappel/{}".format(show.id)
        self.check_restricted_access(url, validate_user=user_is_staff)
        # Actually send the reminder emails
        _, staff_c = self.client_matrix[0]
        resp = staff_c.post(url)
        self.assertEqual(200, resp.status_code)
        # TODO: check that emails are sent

    def test_catalogue_api(self):
        url_list = "/bda/catalogue/list"
        url_details = "/bda/catalogue/details?id={}".format(self.tirage.id)
        url_descriptions = "/bda/catalogue/descriptions?id={}".format(self.tirage.id)

        # Anyone can get
        def anyone_can_get(url):
            self.check_restricted_access(url, validate_user=lambda user: True)

        anyone_can_get(url_list)
        anyone_can_get(url_details)
        anyone_can_get(url_descriptions)

        # The resulting JSON contains the information
        _, client = self.client_matrix[0]

        # List
        resp = client.get(url_list)
        self.assertJSONEqual(
            resp.content.decode("utf-8"),
            [{"id": self.tirage.id, "title": self.tirage.title}],
        )

        # Details
        resp = client.get(url_details)
        self.assertJSONEqual(
            resp.content.decode("utf-8"),
            {
                "categories": [{"id": self.category.id, "name": self.category.name}],
                "locations": [{"id": self.location.id, "name": self.location.name}],
            },
        )

        # Descriptions
        resp = client.get(url_descriptions)
        raw = resp.content.decode("utf-8")
        try:
            results = json.loads(raw)
        except ValueError:
            self.fail("Not valid JSON: {}".format(raw))
        self.assertEqual(len(results), 3)
        self.assertEqual(
            {(s["title"], s["price"], s["slots"]) for s in results},
            {("foo", 0, 42), ("bar", 1, 142), ("baz", 2, 242)},
        )


class TestBdaRevente:
    pass
    # TODO