from pathlib import Path
ROOT = Path(__file__).resolve().parents[1]

def test_frontend_assets_are_externalized():
    html=(ROOT/'app.html').read_text(encoding='utf-8')
    assert '/static/css/app.css?v=__APP_VERSION__' in html
    assert '/static/js/app.js?v=__APP_VERSION__' in html
    assert (ROOT/'static/css/app.css').stat().st_size > 10000
    assert (ROOT/'static/js/app.js').stat().st_size > 50000
    assert html.count('<style>') == 0

def test_backend_is_domain_split():
    ui=(ROOT/'ui_server.py').read_text(encoding='utf-8')
    assert 'from views.admin import _render_admin_dashboard, _render_admin_user_detail' in ui
    assert 'from services.project_planner import _project_package_plan' in ui
    assert 'register_data_health_route(app, sidebar_dataset_quality, sidebar_dataset_metadata_audit)' in ui
    assert (ROOT/'views/admin.py').exists()
    assert (ROOT/'services/project_planner.py').exists()
    assert (ROOT/'routes/data_health.py').exists()

def test_ui_server_shrank_from_v362_monolith():
    # v3.6.2 was ~228 KB. P0 should make measurable progress without changing behavior.
    assert (ROOT/'ui_server.py').stat().st_size < 190_000