import json
from datetime import timezone
from zoneinfo import ZoneInfo
from hyprsunset_qt.sun import to_local_hm, read_cache, write_cache


def test_utc_to_local_hm():
    # 2026-07-17T17:40:00+00:00 -> 19:40 in Europe/Rome (UTC+2 summer)
    tz = ZoneInfo("Europe/Rome")
    assert to_local_hm("2026-07-17T17:40:00+00:00", tz) == "19:40"


def test_cache_roundtrip(tmp_path):
    path = tmp_path / "sun.json"
    payload = {"lat": "45.07", "lon": "7.68", "results": {"sunset": "x"}}
    write_cache(payload, path)
    assert read_cache(path) == payload


def test_read_cache_missing(tmp_path):
    assert read_cache(tmp_path / "nope.json") is None