"""Dashboard stats — pure-helper contract tests (no DB / no network)."""
from app.engine import stats as S
from app.engine.normalize import _posted_date
from app.db.repo import _activity_score


def test_posted_date_per_board():
    assert _posted_date({"createdDate": "2026-06-18T10:37:17Z"}) == "2026-06-18T10:37:17Z"   # Naukri
    assert _posted_date({"postedDate": "2026-06-18T12:46:39Z"}) == "2026-06-18T12:46:39Z"     # LinkedIn
    assert _posted_date({"date_posted": "2026-06-17T17:38:14Z"}) == "2026-06-17T17:38:14Z"    # Foundit
    assert _posted_date({"jobDetails": {"createdDate": "2026-06-18T00:00:00Z"}}) is not None   # nested
    assert _posted_date({"nope": "x"}) is None


def test_match_scores_and_histogram():
    opps = [{"match": {"score": 84}}, {"matchScore": 72}, {"match": {"score": 0}}, {}]
    scores = S._match_scores(opps)
    assert sorted(scores) == [72, 84]                 # 0 and missing dropped
    h = S._histogram(scores)
    assert sum(h) == 2 and len(h) == 11


def test_apply_window_freshness():
    # all None when no posting dates (honest — never fabricated)
    assert S._apply_window([{}, {"posted_date": None}])["urgency"] is None
    w = S._apply_window([{"posted_date": "2026-06-19T00:00:00Z"}, {"posted_date": "2026-06-15T00:00:00Z"}])
    assert w["dated"] == 2 and w["median_age_days"] is not None and w["urgency"] in ("high", "medium", "low")


def test_activity_score_weighting():
    # applies weighted highest, then saves, views, searches
    assert _activity_score(0, 0, 1, 0) > _activity_score(0, 1, 0, 0) > _activity_score(1, 0, 0, 0)
    assert _activity_score(0, 0, 0, 0) == 0