import re
from datetime import datetime, timezone

import freezegun
import pytest
from bs4 import BeautifulSoup
from django.conf import settings
from django.http import HttpResponse
from django.test import TestCase
from django.test.client import Client
from django.urls import reverse
from django.utils.timezone import localdate, now
from model_bakery import baker
from pytest_django.asserts import assertRedirects

import eboutic.models
from core.baker_recipes import subscriber_user
from core.models import Group, User
from counter.baker_recipes import (
    price_recipe,
    product_recipe,
    refill_recipe,
    sale_recipe,
)
from counter.models import (
    Counter,
    Customer,
    ProductType,
    get_eboutic,
)
from counter.tests.test_counter import BasketItem
from eboutic.models import Basket


@pytest.mark.django_db
def test_get_eboutic():
    assert Counter.objects.get(name="Eboutic") == get_eboutic()

    baker.make(Counter, type="EBOUTIC")

    assert Counter.objects.get(name="Eboutic") == get_eboutic()


@pytest.mark.django_db
def test_eboutic_access_unregistered(client: Client):
    eboutic_url = reverse("eboutic:main")
    assertRedirects(
        client.get(eboutic_url), reverse("core:login", query={"next": eboutic_url})
    )


@pytest.mark.django_db
def test_eboutic_access_new_customer(client: Client):
    user = baker.make(User)
    assert not Customer.objects.filter(user=user).exists()

    client.force_login(user)

    assert client.get(reverse("eboutic:main")).status_code == 200
    assert Customer.objects.filter(user=user).exists()


@pytest.mark.django_db
def test_eboutic_access_old_customer(client: Client):
    user = baker.make(User)
    customer = Customer.get_or_create(user)[0]

    client.force_login(user)

    assert client.get(reverse("eboutic:main")).status_code == 200
    assert Customer.objects.filter(user=user).first() == customer


@pytest.mark.django_db
@pytest.mark.parametrize(
    ("sellings", "refillings", "expected"),
    (
        ([], [], None),
        (
            [datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc)],
            [],
            datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc),
        ),
        (
            [],
            [datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc)],
            datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc),
        ),
        (
            [datetime(2025, 2, 7, 1, 2, 3, tzinfo=timezone.utc)],
            [datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc)],
            datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc),
        ),
        (
            [datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc)],
            [datetime(2025, 2, 7, 1, 2, 3, tzinfo=timezone.utc)],
            datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc),
        ),
        (
            [
                datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc),
                datetime(2025, 2, 7, 1, 2, 3, tzinfo=timezone.utc),
            ],
            [datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc)],
            datetime(2025, 3, 7, 1, 2, 3, tzinfo=timezone.utc),
        ),
    ),
)
def test_eboutic_basket_expiry(
    client: Client,
    sellings: list[datetime],
    refillings: list[datetime],
    expected: datetime | None,
):
    eboutic = get_eboutic()

    customer = baker.make(Customer)

    client.force_login(customer.user)

    if sellings:
        sale_recipe.make(
            customer=customer,
            counter=eboutic,
            date=iter(sellings),
            _quantity=len(sellings),
            _bulk_create=True,
        )
    if refillings:
        refill_recipe.make(
            customer=customer,
            counter=eboutic,
            date=iter(refillings),
            _quantity=len(refillings),
            _bulk_create=True,
        )

    soup = BeautifulSoup(client.get(reverse("eboutic:main")).text, "lxml")
    assert (
        # remove any space from the value before asserting
        re.sub(r"\s+", "", soup.find(id="eboutic").attrs["x-data"])
        == f"basket([],{int(expected.timestamp() * 1000) if expected else 'null'},)"
    )


class TestEboutic(TestCase):
    @classmethod
    def setUpTestData(cls):
        cls.group_cotiz = baker.make(Group)
        cls.group_public = baker.make(Group)

        cls.new_customer = baker.make(User)
        cls.new_customer_adult = baker.make(User)
        cls.subscriber = subscriber_user.make()

        cls.set_age(cls.new_customer, 5)
        cls.set_age(cls.new_customer_adult, 20)
        cls.set_age(cls.subscriber, 20)

        product_type = baker.make(ProductType)

        cls.snack = price_recipe.make(
            amount=1.5, product=product_recipe.make(product_type=product_type)
        )
        cls.beer = price_recipe.make(
            product=product_recipe.make(limit_age=18, product_type=product_type),
            amount=2.5,
        )
        cls.not_in_counter = price_recipe.make(
            product=product_recipe.make(product_type=product_type), amount=3.5
        )
        cls.cotiz = price_recipe.make(
            amount=10, product=product_recipe.make(product_type=product_type)
        )

        cls.group_public.prices.add(cls.snack, cls.beer, cls.not_in_counter)
        cls.group_cotiz.prices.add(cls.cotiz)

        cls.subscriber.groups.add(cls.group_cotiz, cls.group_public)
        cls.new_customer.groups.add(cls.group_public)
        cls.new_customer_adult.groups.add(cls.group_public)

        cls.eboutic = get_eboutic()
        cls.eboutic.products.add(cls.cotiz.product, cls.beer.product, cls.snack.product)

    @classmethod
    def set_age(cls, user: User, age: int):
        user.date_of_birth = localdate().replace(year=localdate().year - age)
        user.save()

    def submit_basket(
        self, basket: list[BasketItem], client: Client | None = None
    ) -> HttpResponse:
        used_client: Client = client if client is not None else self.client
        data = {
            "form-TOTAL_FORMS": str(len(basket)),
            "form-INITIAL_FORMS": "0",
        }
        for index, item in enumerate(basket):
            data.update(item.to_form(index))
        return used_client.post(reverse("eboutic:main"), data)

    def test_submit_empty_basket(self):
        self.client.force_login(self.subscriber)
        for basket in [
            [],
            [BasketItem(None, None)],
            [BasketItem(None, None), BasketItem(None, None)],
        ]:
            response = self.submit_basket(basket)
            assert response.status_code == 200
            assert "Votre panier est vide" in response.text

    def test_submit_invalid_basket(self):
        self.client.force_login(self.subscriber)
        for item in [
            BasketItem(-1, 2),
            BasketItem(self.snack.id, -1),
            BasketItem(None, 1),
            BasketItem(self.snack.id, None),
        ]:
            response = self.submit_basket([item])
            assert response.status_code == 200

    def test_anonymous(self):
        assertRedirects(
            self.client.get(reverse("eboutic:main")),
            reverse("core:login", query={"next": reverse("eboutic:main")}),
        )
        assertRedirects(
            self.submit_basket([]),
            reverse("core:login", query={"next": reverse("eboutic:main")}),
        )
        assertRedirects(
            self.submit_basket([BasketItem(self.snack.id, 1)]),
            reverse("core:login", query={"next": reverse("eboutic:main")}),
        )

    def test_add_forbidden_product(self):
        self.client.force_login(self.new_customer)
        for product in self.beer, self.cotiz, self.not_in_counter:
            response = self.submit_basket([BasketItem(product.id, 1)])
            assert response.status_code == 200
            assert not Basket.objects.exists()

    def test_sold_out_product(self):
        sold_out = product_recipe.make(
            clic_limit=3, counters=[self.eboutic], product_type=baker.make(ProductType)
        )
        price = price_recipe.make(product=sold_out, groups=[self.group_cotiz], amount=0)
        sale_recipe.make(
            product=sold_out,
            customer=self.subscriber.customer,
            unit_price=0,
            quantity=1,
        )
        baker.make(
            eboutic.models.BasketItem,
            basket=baker.make(Basket),
            product=sold_out,
            quantity=2,
        )
        self.client.force_login(self.subscriber)
        response = self.submit_basket([BasketItem(price.id, 1)])
        assert response.status_code == 200
        assert Basket.objects.count() == 1
        with freezegun.freeze_time(
            now()
            + settings.SITH_EBOUTIC_BASKET_TIMEOUT
            + settings.SITH_EBOUTIC_ETRANSACTION_TIMEOUT
        ):
            # after a while, unpaid basket items should expire and make the
            # product available again.
            response = self.submit_basket([BasketItem(price.id, 1)])
        assertRedirects(
            response,
            reverse("eboutic:checkout", kwargs={"basket_id": Basket.objects.last().id}),
        )
        assert Basket.objects.count() == 2

    def test_create_basket(self):
        self.client.force_login(self.new_customer)
        assertRedirects(
            self.submit_basket([BasketItem(self.snack.id, 2)]),
            reverse("eboutic:checkout", kwargs={"basket_id": 1}),
        )
        assert Basket.objects.get(id=1).total == self.snack.amount * 2

        self.client.force_login(self.new_customer_adult)
        assertRedirects(
            self.submit_basket(
                [BasketItem(self.snack.id, 2), BasketItem(self.beer.id, 1)]
            ),
            reverse("eboutic:checkout", kwargs={"basket_id": 2}),
        )
        assert (
            Basket.objects.get(id=2).total == self.snack.amount * 2 + self.beer.amount
        )

        self.client.force_login(self.subscriber)
        assertRedirects(
            self.submit_basket(
                [
                    BasketItem(self.snack.id, 2),
                    BasketItem(self.beer.id, 1),
                    BasketItem(self.cotiz.id, 1),
                ]
            ),
            reverse("eboutic:checkout", kwargs={"basket_id": 3}),
        )
        assert (
            Basket.objects.get(id=3).total
            == self.snack.amount * 2 + self.beer.amount + self.cotiz.amount
        )