"""Tests fuer src/source_meta.py - Single Source of Truth fuer Kategorien/Typen."""
from source_meta import (
    SOURCE_CATEGORIES, SOURCE_TYPES,
    get_meta, category_label, type_label,
)


def test_categories_have_unique_keys():
    keys = [c["key"] for c in SOURCE_CATEGORIES]
    assert len(keys) == len(set(keys))


def test_types_have_unique_keys():
    keys = [t["key"] for t in SOURCE_TYPES]
    assert len(keys) == len(set(keys))


def test_categories_and_types_have_label():
    for c in SOURCE_CATEGORIES:
        assert "key" in c and "label" in c
        assert isinstance(c["label"], str) and c["label"]
    for t in SOURCE_TYPES:
        assert "key" in t and "label" in t


def test_get_meta_shape():
    meta = get_meta()
    assert set(meta.keys()) == {"categories", "types"}
    assert meta["categories"] == SOURCE_CATEGORIES
    assert meta["types"] == SOURCE_TYPES


def test_category_label_lookup():
    assert category_label("nachrichtenagentur") == "Nachrichtenagentur"
    assert category_label("oeffentlich-rechtlich") == "Öffentlich-Rechtlich"
    # Unbekannter key -> Fallback auf key selbst
    assert category_label("does-not-exist") == "does-not-exist"


def test_type_label_lookup():
    assert type_label("rss_feed") == "RSS-Feed"
    assert type_label("telegram_channel") == "Telegram-Kanal"
    assert type_label("x_account") == "X-Konto"
    assert type_label("pdf_document") == "PDF-Dokument"
    assert type_label("does-not-exist") == "does-not-exist"


def test_category_covers_bestand():
    """telegram und x muessen als Kategorien existieren (belegter Bestand),
    die nie belegten Lagen-Kategorien sind bewusst entfernt."""
    keys = {c["key"] for c in SOURCE_CATEGORIES}
    assert "telegram" in keys
    assert "x" in keys
    assert "cybercrime" not in keys
    assert "ukraine-russland-krieg" not in keys
    assert "russische-staatspropaganda" not in keys