import importlib.util
from pathlib import Path

spec = importlib.util.spec_from_file_location("runway", Path(__file__).resolve().parent.parent / "tools" / "runway.py")
runway = importlib.util.module_from_spec(spec)
spec.loader.exec_module(runway)

STATE = {
    "storage": [
        {"type": "STORE", "planet": "ZV-759c", "items": {"C": 6, "STL": 0}},
        {"type": "STORE", "planet": "ZV-194a", "items": {"RAT": 30}},          # Nike's, must not leak into Deimos
        {"type": "SHIP_STORE", "name": "AVI-07JFB", "items": {"C": 39, "STL": 15}},
        {"type": "SHIP_STORE", "name": "AVI-07JFC", "items": {"MCG": 205}},    # not inbound to Deimos in this fixture
    ],
    "ships": [
        {"reg": "AVI-07JFB", "flight": {"destination": "Antares II (ZV-759) - Deimos (ZV-759c)"}},
        {"reg": "AVI-07JFC", "flight": {"destination": "Antares III (ZV-194) - Nike (ZV-194a)"}},
        {"reg": "AVI-IDLE", "flight": None},
    ],
}


def test_inbound_ships_matches_destination_planet():
    assert runway.inbound_ships(STATE, "ZV-759c") == ["AVI-07JFB"]
    assert runway.inbound_ships(STATE, "ZV-194a") == ["AVI-07JFC"]


def test_inbound_ships_ignores_ships_with_no_flight():
    assert "AVI-IDLE" not in runway.inbound_ships(STATE, "ZV-759c")


def test_on_hand_scopes_store_to_the_right_planet():
    have = runway.on_hand(STATE, "ZV-759c", ships=[])
    assert have == {"C": 6, "STL": 0}                  # Nike's RAT must not appear here


def test_on_hand_adds_named_ship_cargo():
    have = runway.on_hand(STATE, "ZV-759c", ships=["AVI-07JFB"])
    assert have == {"C": 45, "STL": 15}                # 6+39, 0+15


def test_on_hand_with_inbound_ships_end_to_end():
    ships = runway.inbound_ships(STATE, "ZV-759c")
    have = runway.on_hand(STATE, "ZV-759c", ships)
    assert have == {"C": 45, "STL": 15}                 # only JFB counted, not JFC (heading to Nike)