import os
from pathlib import Path

from ais_hub.config import Config, load_config


def test_defaults_when_no_file():
    cfg = load_config(None)
    assert isinstance(cfg, Config)
    assert cfg.ingest.ais_udp.port == 4001
    assert cfg.publish.udp_tx_outbox.port == 6010
    assert cfg.publish.udp_nmea.port == 6007
    assert cfg.publish.udp_events.port == 7001


def test_yaml_overrides(tmp_path: Path):
    p = tmp_path / "c.yaml"
    p.write_text(
        "ingest:\n"
        "  ais_udp:\n"
        "    port: 5555\n"
        "publish:\n"
        "  http:\n"
        "    port: 9090\n",
        encoding="utf-8",
    )
    cfg = load_config(p)
    assert cfg.ingest.ais_udp.port == 5555
    assert cfg.publish.http.port == 9090
    # Untouched defaults remain.
    assert cfg.publish.udp_nmea.port == 6007


def test_env_overrides(tmp_path: Path, monkeypatch):
    monkeypatch.setenv("AIS_HUB_PUBLISH__HTTP__PORT", "7070")
    monkeypatch.setenv("AIS_HUB_STORAGE__STORE_RAW_NMEA", "true")
    cfg = load_config(None)
    assert cfg.publish.http.port == 7070
    assert cfg.storage.store_raw_nmea is True