"""Theme discovery must be a single source of truth."""
import json
from pathlib import Path
from app import core, theme_pro, theme_store

ROOT = Path(core.__file__).resolve().parent.parent

def test_discover_returns_builtin_themes_with_manifests():
    ids = core.discover_themes()
    for tid in ('automotive', 'industrial', 'corporate', 'minimal'):
        assert tid in ids
    for tid in ids:
        manifest = json.loads((ROOT / 'themes' / tid / 'manifest.json').read_text(encoding='utf-8'))
        assert manifest.get('id') == tid

def test_three_whitelists_agree():
    assert set(core.THEMES) == set(theme_pro.THEMES) == set(theme_store.BUILTIN)
    assert isinstance(core.THEMES, tuple)