import pytest
from django.db import IntegrityError
from taggit.models import Tag

from apps.blog.models import ArticleIndexPage, ArticlePage, Category, HomePage, TagMetadata
from apps.blog.tests.factories import AuthorFactory


@pytest.mark.django_db
def test_home_page_creation(home_page):
    assert HomePage.objects.count() == 1


@pytest.mark.django_db
def test_article_index_parent_restriction():
    assert ArticleIndexPage.parent_page_types == ["blog.HomePage"]


@pytest.mark.django_db
def test_article_compute_read_time_excludes_code(home_page):
    index = ArticleIndexPage(title="Articles", slug="articles")
    home_page.add_child(instance=index)
    author = AuthorFactory()
    article = ArticlePage(
        title="A",
        slug="a",
        author=author,
        summary="s",
        body=[("rich_text", "<p>one two three</p>"), ("code", {"language": "python", "raw_code": "x y z"})],
    )
    index.add_child(instance=article)
    article.save()
    assert article.read_time_mins == 1


@pytest.mark.django_db
def test_tag_metadata_css_and_uniqueness():
    tag = Tag.objects.create(name="llms", slug="llms")
    meta = TagMetadata.objects.create(tag=tag, colour="cyan")
    assert meta.get_css_classes()["bg"] == "bg-brand-cyan/10"
    with pytest.raises(IntegrityError):
        TagMetadata.objects.create(tag=tag, colour="pink")


@pytest.mark.django_db
def test_article_default_category_is_assigned(home_page):
    index = ArticleIndexPage(title="Articles", slug="articles")
    home_page.add_child(instance=index)
    author = AuthorFactory()
    article = ArticlePage(
        title="Categorised",
        slug="categorised",
        author=author,
        summary="s",
        body=[("rich_text", "<p>body</p>")],
    )
    index.add_child(instance=article)
    article.save()
    assert article.category.slug == "general"


@pytest.mark.django_db
def test_category_ordering():
    Category.objects.get_or_create(name="General", slug="general")
    Category.objects.create(name="Z", slug="z", sort_order=2)
    Category.objects.create(name="A", slug="a", sort_order=1)
    names = list(Category.objects.values_list("name", flat=True))
    assert names == ["General", "A", "Z"]