#!/usr/bin/env python3
"""Tests for gsc_signal_delta. Run: `python3 test_gsc_signal_delta.py`
(also pytest-compatible). Stdlib only."""
import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).parent))
from gsc_signal_delta import compute_delta  # noqa: E402

# Genesis fixture: JHR "호텔" — flat head term, growth all brand (2026-06 case).
RECENT = [
    {"query": "호텔", "clicks": 5, "impressions": 572, "position": 11.6},
    {"query": "grand josun busan", "clicks": 250, "impressions": 4000, "position": 1.2},
    {"query": "조선호텔", "clicks": 300, "impressions": 6000, "position": 1.1},
]
PRIOR = [
    {"query": "호텔", "clicks": 9, "impressions": 371, "position": 18.1},
    {"query": "grand josun busan", "clicks": 49, "impressions": 1500, "position": 3.4},
    {"query": "조선호텔", "clicks": 150, "impressions": 5000, "position": 1.3},
]


def test_claim_term_flagged_artifact():
    out = compute_delta(RECENT, PRIOR, 28, 30, claim_term="호텔")
    ct = out["claim_term"]
    assert ct["found"] is True
    assert ct["in_top_movers"] is False
    assert ct["click_share_pct"] < 1.0
    assert "ARTIFACT" in out["verdict_hint"]


def test_top_gainer_is_brand_term():
    out = compute_delta(RECENT, PRIOR, 28, 30, claim_term="호텔")
    assert out["top_gainers"][0]["query"] == "grand josun busan"
    assert out["top_gainers"][0]["delta_clicks"] == 201


def test_day_normalization():
    out = compute_delta(RECENT, PRIOR, 28, 30)
    assert out["site_totals"]["recent"]["clicks_per_day"] == 19.82   # 555/28
    assert out["site_totals"]["prior"]["clicks_per_day"] == 6.93     # 208/30


def test_absent_claim_term_inconclusive():
    out = compute_delta(RECENT, PRIOR, 28, 30, claim_term="존재하지않는검색어")
    assert out["claim_term"]["found"] is False
    assert "INCONCLUSIVE" in out["verdict_hint"]


def test_positive_days_required():
    try:
        compute_delta(RECENT, PRIOR, 0, 30)
    except ValueError:
        return
    raise AssertionError("expected ValueError for non-positive days")


def _run():
    fns = [v for k, v in sorted(globals().items()) if k.startswith("test_")]
    for fn in fns:
        fn(); print(f"PASS {fn.__name__}")
    print(f"\n{len(fns)} passed")


if __name__ == "__main__":
    _run()