# -*- coding:utf-8 -*-
#
# Copyright 2023 © AE UTBM
# ae@utbm.fr / ae.info@utbm.fr
# All contributors are listed in the CONTRIBUTORS file.
#
# This file is part of the website of the UTBM Student Association (AE UTBM),
# https://ae.utbm.fr.
#
# You can find the whole source code at https://github.com/ae-utbm/sith3
#
# LICENSED UNDER THE GNU GENERAL PUBLIC LICENSE VERSION 3 (GPLv3)
# SEE : https://raw.githubusercontent.com/ae-utbm/sith3/master/LICENSE
# OR WITHIN THE LOCAL FILE "LICENSE"
#
# PREVIOUSLY LICENSED UNDER THE MIT LICENSE,
# SEE : https://raw.githubusercontent.com/ae-utbm/sith3/master/LICENSE.old
# OR WITHIN THE LOCAL FILE "LICENSE.old"
#

import os
from datetime import date, timedelta

import freezegun
import pytest
from django.core.cache import cache
from django.test import TestCase
from django.urls import reverse
from django.utils.timezone import now
from pytest_django.asserts import assertRedirects

from club.models import Membership
from core.markdown import markdown
from core.models import AnonymousUser, Group, Page, User
from core.utils import get_semester_code, get_start_of_semester
from sith import settings


@pytest.mark.django_db
class TestUserRegistration:
    @pytest.fixture()
    def valid_payload(self):
        return {
            "first_name": "this user does not exist (yet)",
            "last_name": "this user does not exist (yet)",
            "email": "i-dont-exist-yet@git.an",
            "password1": "plop",
            "password2": "plop",
            "captcha_0": "dummy-value",
            "captcha_1": "PASSED",
        }

    def test_register_user_form_ok(self, client, valid_payload):
        """Should register a user correctly."""
        response = client.post(reverse("core:register"), valid_payload)
        assert response.status_code == 200
        assert "TEST_REGISTER_USER_FORM_OK" in str(response.content)

    @pytest.mark.parametrize(
        "payload_edit",
        [
            {"password2": "not the same as password1"},
            {"email": "not-an-email"},
            {"first_name": ""},
            {"last_name": ""},
            {"captcha_1": "WRONG_CAPTCHA"},
        ],
    )
    def test_register_user_form_fail(self, client, valid_payload, payload_edit):
        """Should not register a user correctly."""
        payload = valid_payload | payload_edit
        response = client.post(reverse("core:register"), payload)
        assert response.status_code == 200
        assert "TEST_REGISTER_USER_FORM_FAIL" in str(response.content)

    def test_register_user_form_fail_already_exists(self, client, valid_payload):
        """Should not register a user correctly if it already exists."""
        # create the user, then try to create it again
        client.post(reverse("core:register"), valid_payload)
        response = client.post(reverse("core:register"), valid_payload)
        assert response.status_code == 200
        assert "TEST_REGISTER_USER_FORM_FAIL" in str(response.content)


@pytest.mark.django_db
class TestUserLogin:
    @pytest.fixture()
    def user(self) -> User:
        return User.objects.first()

    def test_login_fail(self, client, user):
        """
        Should not login a user correctly
        """

        response = client.post(
            reverse("core:login"),
            {"username": user.username, "password": "wrong-password"},
        )
        assert response.status_code == 200
        assert (
            '<p class="alert alert-red">Votre nom d\'utilisateur '
            "et votre mot de passe ne correspondent pas. Merci de réessayer.</p>"
        ) in str(response.content.decode())

    def test_login_success(self, client, user):
        """
        Should login a user correctly
        """
        response = client.post(
            reverse("core:login"), {"username": user.username, "password": "plop"}
        )
        assertRedirects(response, reverse("core:index"))


def test_full_markdown_syntax():
    root_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    with open(os.path.join(root_path) + "/doc/SYNTAX.md", "r") as md_file:
        md = md_file.read()
    with open(os.path.join(root_path) + "/doc/SYNTAX.html", "r") as html_file:
        html = html_file.read()
    result = markdown(md)
    assert result == html


class PageHandlingTest(TestCase):
    @classmethod
    def setUpTestData(cls):
        cls.root = User.objects.get(username="root")
        cls.root_group = Group.objects.get(name="Root")

    def setUp(self):
        self.client.force_login(self.root)

    def test_create_page_ok(self):
        """Should create a page correctly."""

        response = self.client.post(
            reverse("core:page_new"),
            {"parent": "", "name": "guy", "owner_group": self.root_group.id},
        )
        self.assertRedirects(
            response, reverse("core:page", kwargs={"page_name": "guy"})
        )
        assert Page.objects.filter(name="guy").exists()

        response = self.client.get(reverse("core:page", kwargs={"page_name": "guy"}))
        assert response.status_code == 200
        html = response.content.decode()
        assert '<a href="/page/guy/hist/">' in html
        assert '<a href="/page/guy/edit/">' in html
        assert '<a href="/page/guy/prop/">' in html

    def test_create_child_page_ok(self):
        """Should create a page correctly."""
        # remove all other pages to make sure there is no side effect
        Page.objects.all().delete()
        self.client.post(
            reverse("core:page_new"),
            {"parent": "", "name": "guy", "owner_group": str(self.root_group.id)},
        )
        page = Page.objects.first()
        self.client.post(
            reverse("core:page_new"),
            {
                "parent": str(page.id),
                "name": "bibou",
                "owner_group": str(self.root_group.id),
            },
        )
        response = self.client.get(
            reverse("core:page", kwargs={"page_name": "guy/bibou"})
        )
        assert response.status_code == 200
        assert '<a href="/page/guy/bibou/">' in str(response.content)

    def test_access_child_page_ok(self):
        """
        Should display a page correctly
        """
        parent = Page(name="guy", owner_group=self.root_group)
        parent.save(force_lock=True)
        page = Page(name="bibou", owner_group=self.root_group, parent=parent)
        page.save(force_lock=True)
        response = self.client.get(
            reverse("core:page", kwargs={"page_name": "guy/bibou"})
        )
        assert response.status_code == 200
        html = response.content.decode()
        self.assertIn('<a href="/page/guy/bibou/edit/">', html)

    def test_access_page_not_found(self):
        """
        Should not display a page correctly
        """
        response = self.client.get(reverse("core:page", kwargs={"page_name": "swagg"}))
        assert response.status_code == 200
        html = response.content.decode()
        self.assertIn('<a href="/page/create/?page=swagg">', html)

    def test_create_page_markdown_safe(self):
        """
        Should format the markdown and escape html correctly
        """
        self.client.post(
            reverse("core:page_new"), {"parent": "", "name": "guy", "owner_group": "1"}
        )
        self.client.post(
            reverse("core:page_edit", kwargs={"page_name": "guy"}),
            {
                "title": "Bibou",
                "content": """Guy *bibou*

http://git.an

# Swag

<guy>Bibou</guy>

<script>alert('Guy');</script>
""",
            },
        )
        response = self.client.get(reverse("core:page", kwargs={"page_name": "guy"}))
        assert response.status_code == 200
        assert (
            '<p>Guy <em>bibou</em></p>\\n<p><a href="http://git.an">http://git.an</a></p>\\n'
            + "<h1>Swag</h1>\\n&lt;guy&gt;Bibou&lt;/guy&gt;"
            + "&lt;script&gt;alert(\\'Guy\\');&lt;/script&gt;"
            in str(response.content)
        )


class UserToolsTest:
    def test_anonymous_user_unauthorized(self, client):
        """An anonymous user shouldn't have access to the tools page"""
        response = client.get(reverse("core:user_tools"))
        assert response.status_code == 403

    @pytest.mark.parametrize("username", ["guy", "root", "skia", "comunity"])
    def test_page_is_working(self, client, username):
        """All existing users should be able to see the test page"""
        # Test for simple user
        client.force_login(User.objects.get(username=username))
        response = client.get(reverse("core:user_tools"))
        assert response.status_code == 200


# TODO: many tests on the pages:
#   - renaming a page
#   - changing a page's parent --> check that page's children's full_name
#   - changing the different groups of the page


class FileHandlingTest(TestCase):
    @classmethod
    def setUpTestData(cls):
        cls.subscriber = User.objects.get(username="subscriber")

    def setUp(self):
        self.client.login(username="subscriber", password="plop")

    def test_create_folder_home(self):
        response = self.client.post(
            reverse("core:file_detail", kwargs={"file_id": self.subscriber.home.id}),
            {"folder_name": "GUY_folder_test"},
        )
        assert response.status_code == 302
        response = self.client.get(
            reverse("core:file_detail", kwargs={"file_id": self.subscriber.home.id})
        )
        assert response.status_code == 200
        assert "GUY_folder_test</a>" in str(response.content)

    def test_upload_file_home(self):
        with open("/bin/ls", "rb") as f:
            response = self.client.post(
                reverse(
                    "core:file_detail", kwargs={"file_id": self.subscriber.home.id}
                ),
                {"file_field": f},
            )
        assert response.status_code == 302
        response = self.client.get(
            reverse("core:file_detail", kwargs={"file_id": self.subscriber.home.id})
        )
        assert response.status_code == 200
        assert "ls</a>" in str(response.content)


class UserIsInGroupTest(TestCase):
    """
    Test that the User.is_in_group() and AnonymousUser.is_in_group()
    work as intended
    """

    @classmethod
    def setUpTestData(cls):
        from club.models import Club

        cls.root_group = Group.objects.get(name="Root")
        cls.public = Group.objects.get(name="Public")
        cls.skia = User.objects.get(username="skia")
        cls.toto = User.objects.create(
            username="toto", first_name="a", last_name="b", email="a.b@toto.fr"
        )
        cls.subscribers = Group.objects.get(name="Subscribers")
        cls.old_subscribers = Group.objects.get(name="Old subscribers")
        cls.accounting_admin = Group.objects.get(name="Accounting admin")
        cls.com_admin = Group.objects.get(name="Communication admin")
        cls.counter_admin = Group.objects.get(name="Counter admin")
        cls.banned_alcohol = Group.objects.get(name="Banned from buying alcohol")
        cls.banned_counters = Group.objects.get(name="Banned from counters")
        cls.banned_subscription = Group.objects.get(name="Banned to subscribe")
        cls.sas_admin = Group.objects.get(name="SAS admin")
        cls.club = Club.objects.create(
            name="Fake Club",
            unix_name="fake-club",
            address="Fake address",
        )
        cls.main_club = Club.objects.get(id=1)

    def assert_in_public_group(self, user):
        assert user.is_in_group(pk=self.public.id)
        assert user.is_in_group(name=self.public.name)

    def assert_in_club_metagroups(self, user, club):
        meta_groups_board = club.unix_name + settings.SITH_BOARD_SUFFIX
        meta_groups_members = club.unix_name + settings.SITH_MEMBER_SUFFIX
        assert user.is_in_group(name=meta_groups_board) is False
        assert user.is_in_group(name=meta_groups_members) is False

    def assert_only_in_public_group(self, user):
        self.assert_in_public_group(user)
        for group in (
            self.root_group,
            self.banned_counters,
            self.accounting_admin,
            self.sas_admin,
            self.subscribers,
            self.old_subscribers,
        ):
            assert not user.is_in_group(pk=group.pk)
            assert not user.is_in_group(name=group.name)
        meta_groups_board = self.club.unix_name + settings.SITH_BOARD_SUFFIX
        meta_groups_members = self.club.unix_name + settings.SITH_MEMBER_SUFFIX
        assert user.is_in_group(name=meta_groups_board) is False
        assert user.is_in_group(name=meta_groups_members) is False

    def test_anonymous_user(self):
        """
        Test that anonymous users are only in the public group
        """
        user = AnonymousUser()
        self.assert_only_in_public_group(user)

    def test_not_subscribed_user(self):
        """
        Test that users who never subscribed are only in the public group
        """
        self.assert_only_in_public_group(self.toto)

    def test_wrong_parameter_fail(self):
        """
        Test that when neither the pk nor the name argument is given,
        the function raises a ValueError
        """
        with self.assertRaises(ValueError):
            self.toto.is_in_group()

    def test_number_queries(self):
        """
        Test that the number of db queries is stable
        and that less queries are made when making a new call
        """
        # make sure Skia is in at least one group
        self.skia.groups.add(Group.objects.first().pk)
        skia_groups = self.skia.groups.all()

        group_in = skia_groups.first()
        cache.clear()
        # Test when the user is in the group
        with self.assertNumQueries(2):
            self.skia.is_in_group(pk=group_in.id)
        with self.assertNumQueries(0):
            self.skia.is_in_group(pk=group_in.id)

        ids = skia_groups.values_list("pk", flat=True)
        group_not_in = Group.objects.exclude(pk__in=ids).first()
        cache.clear()
        # Test when the user is not in the group
        with self.assertNumQueries(2):
            self.skia.is_in_group(pk=group_not_in.id)
        with self.assertNumQueries(0):
            self.skia.is_in_group(pk=group_not_in.id)

    def test_cache_properly_cleared_membership(self):
        """
        Test that when the membership of a user end,
        the cache is properly invalidated
        """
        membership = Membership.objects.create(
            club=self.club, user=self.toto, end_date=None
        )
        meta_groups_members = self.club.unix_name + settings.SITH_MEMBER_SUFFIX
        cache.clear()
        assert self.toto.is_in_group(name=meta_groups_members) is True
        assert membership == cache.get(f"membership_{self.club.id}_{self.toto.id}")
        membership.end_date = now() - timedelta(minutes=5)
        membership.save()
        cached_membership = cache.get(f"membership_{self.club.id}_{self.toto.id}")
        assert cached_membership == "not_member"
        assert self.toto.is_in_group(name=meta_groups_members) is False

    def test_cache_properly_cleared_group(self):
        """
        Test that when a user is removed from a group,
        the is_in_group_method return False when calling it again
        """
        # testing with pk
        self.toto.groups.add(self.com_admin.pk)
        assert self.toto.is_in_group(pk=self.com_admin.pk) is True

        self.toto.groups.remove(self.com_admin.pk)
        assert self.toto.is_in_group(pk=self.com_admin.pk) is False

        # testing with name
        self.toto.groups.add(self.sas_admin.pk)
        assert self.toto.is_in_group(name="SAS admin") is True

        self.toto.groups.remove(self.sas_admin.pk)
        assert self.toto.is_in_group(name="SAS admin") is False

    def test_not_existing_group(self):
        """
        Test that searching for a not existing group
        returns False
        """
        assert self.skia.is_in_group(name="This doesn't exist") is False


class DateUtilsTest(TestCase):
    @classmethod
    def setUpTestData(cls):
        cls.autumn_month = settings.SITH_SEMESTER_START_AUTUMN[0]
        cls.autumn_day = settings.SITH_SEMESTER_START_AUTUMN[1]
        cls.spring_month = settings.SITH_SEMESTER_START_SPRING[0]
        cls.spring_day = settings.SITH_SEMESTER_START_SPRING[1]

        cls.autumn_semester_january = date(2025, 1, 4)
        cls.autumn_semester_september = date(2024, 9, 4)
        cls.autumn_first_day = date(2024, cls.autumn_month, cls.autumn_day)

        cls.spring_semester_march = date(2023, 3, 4)
        cls.spring_first_day = date(2023, cls.spring_month, cls.spring_day)

    def test_get_semester(self):
        """
        Test that the get_semester function returns the correct semester string
        """
        assert get_semester_code(self.autumn_semester_january) == "A24"
        assert get_semester_code(self.autumn_semester_september) == "A24"
        assert get_semester_code(self.autumn_first_day) == "A24"

        assert get_semester_code(self.spring_semester_march) == "P23"
        assert get_semester_code(self.spring_first_day) == "P23"

    def test_get_start_of_semester_fixed_date(self):
        """
        Test that the get_start_of_semester correctly the starting date of the semester.
        """
        automn_2024 = date(2024, self.autumn_month, self.autumn_day)
        assert get_start_of_semester(self.autumn_semester_january) == automn_2024
        assert get_start_of_semester(self.autumn_semester_september) == automn_2024
        assert get_start_of_semester(self.autumn_first_day) == automn_2024

        spring_2023 = date(2023, self.spring_month, self.spring_day)
        assert get_start_of_semester(self.spring_semester_march) == spring_2023
        assert get_start_of_semester(self.spring_first_day) == spring_2023

    def test_get_start_of_semester_today(self):
        """
        Test that the get_start_of_semester returns the start of the current semester
        when no date is given
        """
        with freezegun.freeze_time(self.autumn_semester_september):
            assert get_start_of_semester() == self.autumn_first_day

        with freezegun.freeze_time(self.spring_semester_march):
            assert get_start_of_semester() == self.spring_first_day

    def test_get_start_of_semester_changing_date(self):
        """
        Test that the get_start_of_semester correctly gives the starting date of the semester,
        even when the semester changes while the server isn't restarted.
        """
        spring_2023 = date(2023, self.spring_month, self.spring_day)
        autumn_2023 = date(2023, self.autumn_month, self.autumn_day)
        mid_spring = spring_2023 + timedelta(days=45)
        mid_autumn = autumn_2023 + timedelta(days=45)

        with freezegun.freeze_time(mid_spring) as frozen_time:
            assert get_start_of_semester() == spring_2023

            # forward time to the middle of the next semester
            frozen_time.move_to(mid_autumn)
            assert get_start_of_semester() == autumn_2023