from ais_hub.core import merge
from ais_hub.core.models import AisReport, MergedTarget


def test_eager_merge_updates_dynamic_fields():
    t = MergedTarget(mmsi=123)
    rep = AisReport(
        ts=100.0, source="src", kind="dynamic", mmsi=123, msg_type=1,
        channel="A", data={"lat": 10.5, "lon": 20.5, "sog": 7.1, "cog": 180.0},
    )
    changed = merge.apply(t, rep)
    assert changed is True
    assert t.lat == 10.5
    assert t.sog == 7.1
    assert t.last_dynamic_ts == 100.0
    assert t.last_seen == 100.0


def test_stale_dynamic_report_is_ignored():
    t = MergedTarget(mmsi=123)
    t.last_dynamic_ts = 200.0
    t.lat = 1.0
    older = AisReport(
        ts=100.0, source="src", kind="dynamic", mmsi=123, msg_type=1,
        data={"lat": 50.0},
    )
    merge.apply(t, older)
    assert t.lat == 1.0  # unchanged


def test_static_and_dynamic_keep_separate_timestamps():
    t = MergedTarget(mmsi=42)
    dyn = AisReport(
        ts=100.0, source="a", kind="dynamic", mmsi=42, msg_type=1,
        data={"lat": 1.0, "lon": 2.0},
    )
    stat = AisReport(
        ts=110.0, source="a", kind="static", mmsi=42, msg_type=5,
        data={"name": "MV TEST", "callsign": "ABCD", "imo": 9999999},
    )
    merge.apply(t, dyn)
    merge.apply(t, stat)
    assert t.lat == 1.0 and t.name == "MV TEST"
    assert t.last_dynamic_ts == 100.0
    assert t.last_static_ts == 110.0
    assert t.last_seen == 110.0


def test_msg24_name_and_callsign_combine():
    t = MergedTarget(mmsi=7)
    # Msg 24A -> name
    merge.apply(t, AisReport(
        ts=10.0, source="a", kind="static", mmsi=7, msg_type=24,
        data={"name": "BOAT"},
    ))
    # Msg 24B -> callsign + dims (later, must not wipe name)
    merge.apply(t, AisReport(
        ts=11.0, source="a", kind="static", mmsi=7, msg_type=24,
        data={"callsign": "CALL", "dim_a": 10, "dim_b": 20},
    ))
    assert t.name == "BOAT"
    assert t.callsign == "CALL"
    assert t.dim_a == 10