"""Tests voor het herwerkte loginscherm en de bijbehorende authenticatie-flows."""

from __future__ import annotations

import pytest
from django.conf import settings
from django.contrib.auth import get_user_model
from django.core import mail
from django.test import override_settings
from django.urls import reverse

pytestmark = [pytest.mark.integration, pytest.mark.django_db]


def test_login_page_renders_stitch_design(client):
    response = client.get(reverse("login"))
    assert response.status_code == 200
    body = response.content.decode("utf-8")
    assert "<h1>Inloggen</h1>" in body
    assert 'name="username"' in body and 'type="email"' in body
    assert "Wachtwoord vergeten?" in body
    # Local-first: geen externe CDN-assets op het loginscherm.
    assert "cdn.tailwindcss.com" not in body
    assert "https://fonts.googleapis.com" not in body
    assert reverse("password_reset") in body


def test_login_with_email(client, user):
    response = client.post(
        reverse("login"),
        {"username": user.email, "password": "correct-horse-battery-staple"},
    )
    assert response.status_code == 302
    assert response.url == reverse("dashboard:today")
    assert client.session.get("_auth_user_id") == str(user.pk)


def test_login_with_username_still_works(client, user):
    response = client.post(
        reverse("login"),
        {"username": user.username, "password": "correct-horse-battery-staple"},
    )
    assert response.status_code == 302
    assert client.session.get("_auth_user_id") == str(user.pk)


def test_login_email_case_insensitive(client, user):
    response = client.post(
        reverse("login"),
        {"username": user.email.upper(), "password": "correct-horse-battery-staple"},
    )
    assert response.status_code == 302
    assert client.session.get("_auth_user_id") == str(user.pk)


def test_login_wrong_password_shows_error(client, user):
    response = client.post(
        reverse("login"),
        {"username": user.email, "password": "verkeerd-wachtwoord"},
    )
    assert response.status_code == 200
    assert "klopt niet" in response.content.decode("utf-8")


def test_password_reset_sends_email(client, user):
    response = client.post(reverse("password_reset"), {"email": user.email})
    assert response.status_code == 302
    assert response.url == reverse("password_reset_done")
    assert len(mail.outbox) == 1
    message = mail.outbox[0]
    assert user.email in message.to
    assert "wachtwoord" in message.subject.lower()
    assert "/wachtwoord/herstellen/" in message.body


def test_password_reset_unknown_email_is_silent(client):
    response = client.post(reverse("password_reset"), {"email": "onbekend@example.invalid"})
    assert response.status_code == 302
    assert len(mail.outbox) == 0


def test_demo_button_visible_by_default(client):
    assert reverse("demo-login") in client.get(reverse("login")).content.decode("utf-8")


@override_settings(DEMO_MODE_ENABLED=False)
def test_demo_login_disabled_redirects(client):
    response = client.post(reverse("demo-login"))
    assert response.status_code == 302
    assert response.url == reverse("login")
    assert client.session.get("_auth_user_id") is None


@override_settings(DEMO_MODE_ENABLED=False)
def test_demo_button_hidden_when_disabled(client):
    assert "demo-login" not in client.get(reverse("login")).content.decode("utf-8")


def test_demo_login_logs_in_and_seeds_environment(client):
    from apps.jobs.models import Application, JobPosting, ScoreRun
    from apps.profiles.models import SearchProfile

    response = client.post(reverse("demo-login"))
    assert response.status_code == 302
    assert response.url == reverse("dashboard:today")

    user = get_user_model().objects.get(username=settings.DEMO_USERNAME)
    assert not user.has_usable_password()
    assert client.session.get("_auth_user_id") == str(user.pk)

    # Fictieve, gevulde demo-omgeving.
    profile = SearchProfile.objects.get(user=user, is_active=True)
    assert JobPosting.objects.count() >= 5
    assert ScoreRun.objects.filter(profile=profile).count() >= 5
    assert Application.objects.filter(user=user).exists()

    # Het gevulde dashboard rendert zonder fouten.
    dashboard = client.get(reverse("dashboard:today"))
    assert dashboard.status_code == 200


def test_demo_login_is_idempotent(client):
    from apps.jobs.models import JobPosting

    client.post(reverse("demo-login"))
    first = JobPosting.objects.count()
    client.post(reverse("demo-login"))
    assert JobPosting.objects.count() == first


def test_entra_login_disabled_redirects(client):
    response = client.post(reverse("entra-login"))
    assert response.status_code == 302
    assert response.url == reverse("login")


@override_settings(ENTRA_ID_ENABLED=True, ENTRA_CLIENT_ID="", ENTRA_TENANT_ID="")
def test_entra_login_enabled_but_unconfigured_is_handled(client):
    # Ingeschakeld maar zonder credentials: nette redirect, geen 500.
    response = client.post(reverse("entra-login"), follow=False)
    assert response.status_code == 302
    assert response.url == reverse("login")


@override_settings(ENTRA_ID_ENABLED=True)
def test_entra_button_visible_when_enabled(client):
    assert reverse("entra-login") in client.get(reverse("login")).content.decode("utf-8")