import pytest
import warnings
from nucon import Nucon, PumpStatus, PumpDryStatus, PumpOverloadStatus, BreakerStatus

WARN_FLOAT_COULD_BE_INT = False


@pytest.fixture(scope="function")
def nucon():
    """Create a fresh Nucon instance for each test"""
    return Nucon()

def test_read_all_parameters(nucon):
    all_params = nucon.get_all()
    assert len(all_params) == len(nucon)
    for param, value in all_params.items():
        param_type = nucon.get_type(param)
        if value is None:
            continue  # Some params return null/empty when subsystem not installed
        assert isinstance(value, param_type), f"Parameter {param} has incorrect type. Expected {param_type}, got {type(value)}"
        if param_type == float and value.is_integer() and WARN_FLOAT_COULD_BE_INT:
            warnings.warn(f"Parameter {param} is a float but has an integer value: {value}")

def test_write_writable_parameters(nucon):
    writable_params = nucon.get_all_writable()
    for param in writable_params.values():
        if not param.is_readable:
            continue  # Skip write-only params (can't read back to verify, and actions like SCRAM are dangerous to trigger)
        current_value = param.value
        if current_value is None:
            continue  # Skip params that return null (subsystem not installed)
        param.value = current_value
        assert param.value == current_value, f"Failed to write to parameter {param.id}"

def test_non_writable_parameters(nucon):
    non_writable_params = [param for param in nucon.get_all_readable().values() if not param.is_writable]
    for param in non_writable_params:
        # Test that normal set raises an error
        with pytest.raises(ValueError, match=f"Parameter {param.id} is not writable"):
            param.value = param.value  # Attempt to write the current value

        # Note: the game accepts force writes silently (does not return an error)

def test_enum_parameters(nucon):
    pump_status = nucon.COOLANT_CORE_CIRCULATION_PUMP_0_STATUS.value
    assert isinstance(pump_status, PumpStatus)

    dry_status = nucon.COOLANT_CORE_CIRCULATION_PUMP_0_DRY_STATUS.value
    assert isinstance(dry_status, PumpDryStatus)

    overload_status = nucon.COOLANT_CORE_CIRCULATION_PUMP_0_OVERLOAD_STATUS.value
    assert isinstance(overload_status, PumpOverloadStatus)

    breaker_status = nucon.GENERATOR_0_BREAKER.value
    assert isinstance(breaker_status, BreakerStatus)

def test_custom_truthy_values(nucon):
    assert bool(nucon.COOLANT_CORE_CIRCULATION_PUMP_0_STATUS.value) == (nucon.COOLANT_CORE_CIRCULATION_PUMP_0_STATUS.value in [PumpStatus.ACTIVE_NO_SPEED_REACHED, PumpStatus.ACTIVE_SPEED_REACHED])
    #assert bool(nucon.COOLANT_CORE_CIRCULATION_PUMP_0_DRY_STATUS.value) == (nucon.COOLANT_CORE_CIRCULATION_PUMP_0_DRY_STATUS.value == PumpDryStatus.INACTIVE_OR_ACTIVE_WITH_FLUID)
    #assert bool(nucon.COOLANT_CORE_CIRCULATION_PUMP_0_OVERLOAD_STATUS.value) == (nucon.COOLANT_CORE_CIRCULATION_PUMP_0_OVERLOAD_STATUS.value == PumpOverloadStatus.INACTIVE_OR_ACTIVE_NO_OVERLOAD)
    assert bool(nucon.GENERATOR_0_BREAKER.value) == (nucon.GENERATOR_0_BREAKER.value == BreakerStatus.OPEN)

def test_get_multiple_parameters(nucon):
    params_to_get = [nucon.CORE_TEMP, nucon.CORE_PRESSURE, nucon.TIME]
    multiple_params = nucon.get_multiple(params_to_get)
    assert len(multiple_params) == len(params_to_get)
    for param, value in multiple_params.items():
        param_type = nucon.get_type(param)
        assert isinstance(value, param_type)

def test_param_coverage(nucon):
    raw_game_vars = nucon.get_game_variable_names()
    game_vars = set(v.upper() for v in raw_game_vars)
    our_vars = set(nucon._parameters.keys())

    assert game_vars, f"Got empty variable list from game. Raw sample: {raw_game_vars[:5]}"

    missing_from_game = our_vars - game_vars
    assert not missing_from_game, f"Params defined in NuCon but not found in game: {missing_from_game}\nGame var sample: {sorted(game_vars)[:10]}"

    not_in_nucon = game_vars - our_vars
    if not_in_nucon:
        warnings.warn(f"Game exposes {len(not_in_nucon)} params not defined in NuCon: {sorted(not_in_nucon)}")

if __name__ == "__main__":
    pytest.main()