from __future__ import annotations

import unittest

from app.simulation.components.amesim.storage.chambers import AmesimPnch023
from app.simulation.core.medium import IdealGasMedium
from app.simulation.registry import COMPONENT_MODEL_REGISTRY


class AmesimPnch023ComponentTests(unittest.TestCase):
    def setUp(self) -> None:
        self.medium = IdealGasMedium()

    def test_default_create_preserves_amesim_parameter_contract(self) -> None:
        chamber = COMPONENT_MODEL_REGISTRY["amesim_pnch023"].create(
            "chamber_1",
            self.medium,
            {},
        )

        self.assertIsInstance(chamber, AmesimPnch023)
        self.assertEqual(set(chamber.ports), {"port_1", "port_2"})
        self.assertEqual(
            set(chamber.parameter_values),
            {"cvol", "kth", "sth", "extemp", "gi", "p0", "T0"},
        )
        self.assertEqual(chamber.parameter_values["cvol"], 0.057)
        self.assertEqual(chamber.gi, 0)

    def test_rejects_fractional_gas_index(self) -> None:
        with self.assertRaisesRegex(ValueError, "gi must be an integer"):
            COMPONENT_MODEL_REGISTRY["amesim_pnch023"].create(
                "chamber_1",
                self.medium,
                {"gi": 1.5},
            )





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