from datetime import datetime

from application.usecases.run_watch_cycle import RunWatchCycleUsecase

from domain.entities import Article
from domain.matcher import MatchingService

from tests.fake_article_source import FakeArticleSource
from tests.fake_notifier import FakeNotifier

# Les Fixtures sont des objets ou des fonctions qui fournissent un contexte pour les tests.

def make_article(title: str) -> Article:
    return Article(
        title=title,
        url="http://example.com/article",
        published_at= datetime(2024, 6, 1, 12, 0, 0),
        source="Example News"
    )

def make_usecase(articles: list[Article]) -> tuple[RunWatchCycleUsecase, FakeNotifier]:
    source = FakeArticleSource(articles)
    notifier = FakeNotifier()
    service = MatchingService()

    usecase = RunWatchCycleUsecase(
        source=source,
        notifier=notifier,
        matcher=service
    )
    return usecase, notifier

def test_article_matching_keyword_triggers_alert():
    usecase, notifier = make_usecase([
        make_article("Breaking: New Python Version Released")
        ])
    result = usecase.execute(keywords=["python"])

    assert result.alerts_sent == 1
    assert result.processed == 1
    assert "python" in notifier.alerts_sent[0].matched_keywords

def test_article_without_keyword_triggers_no_alert():
    usecase, notifier = make_usecase([
        make_article("Sports Update: Local Team Wins Championship")
        ])
    result = usecase.execute(keywords=["Python"])

    assert result.alerts_sent == 0
    assert result.processed == 1
    assert len(notifier.alerts_sent) == 0

def test_matching_is_case_insensitive():
    usecase, _ = make_usecase([
        make_article("Breaking: New PYTHON Version Released")
        ])
    result = usecase.execute(keywords=["python"])

    assert result.alerts_sent == 1

def test_only_matching_articles_trigger_alerts():
    articles = [
        make_article("Python 3.13 : les nouveautés"),
        make_article("Recette de brioche au beurre"),
        make_article("Architecture hexagonale en Python"),
        make_article("Les chats dorment 16h par jour"),
    ]
    use_case, notifier = make_usecase(articles)

    result = use_case.execute(keywords=["python"])

    assert result.processed == 4
    assert result.alerts_sent == 2