from __future__ import annotations

import unittest

from app.simulation.examples.test_mql.solver import SolveIVPConfig
from app.simulation.examples.test_mql.system import TestMqlSystem


class TestMqlPneumaticBranchSimulationTests(unittest.TestCase):
    def test_simulate_pneumatic_branch_returns_ode_solution(self) -> None:
        system = TestMqlSystem()

        solution = system.simulate_pneumatic_branch(
            name="sample_branch",
            upstream_volume_alias="pn_general_chamber",
            orifice_alias="pn_orifice_18",
            downstream_volume_alias="pn_c1_8",
            config=SolveIVPConfig(t_start=0.0, t_stop=1.0e-5, max_step=1.0e-6),
            t_eval=[0.0, 5.0e-6, 1.0e-5],
        )

        self.assertTrue(solution.success)
        self.assertEqual(len(solution.t), 3)
        self.assertEqual(len(solution.y), 4)
        self.assertEqual([len(row) for row in solution.y], [3, 3, 3, 3])

    def test_evaluate_pneumatic_branch_solution_reports_branch_series(self) -> None:
        system = TestMqlSystem()
        solution = system.simulate_pneumatic_branch(
            name="sample_branch",
            upstream_volume_alias="pn_general_chamber",
            orifice_alias="pn_orifice_18",
            downstream_volume_alias="pn_c1_8",
            config=SolveIVPConfig(t_start=0.0, t_stop=1.0e-5, max_step=1.0e-6),
            t_eval=[0.0, 5.0e-6, 1.0e-5],
        )

        series = system.evaluate_pneumatic_branch_solution(
            solution,
            name="sample_branch",
            upstream_volume_alias="pn_general_chamber",
            orifice_alias="pn_orifice_18",
            downstream_volume_alias="pn_c1_8",
        )

        self.assertEqual(series["time"], [0.0, 5.0e-6, 1.0e-5])
        self.assertIn("sample_branch.flow", series)
        self.assertIn("pn_general_chamber.p", series)
        self.assertIn("pn_c1_8.p", series)
        self.assertEqual(len(series["sample_branch.flow"]), 3)
        self.assertGreater(series["sample_branch.flow"][0], 0.0)
        self.assertGreater(series["pn_general_chamber.p"][0], series["pn_general_chamber.p"][-1])
        self.assertLess(series["pn_c1_8.p"][0], series["pn_c1_8.p"][-1])
        self.assertAlmostEqual(
            series["pn_general_chamber.m_flow"][0],
            -series["sample_branch.flow"][0],
        )
        self.assertAlmostEqual(
            series["pn_c1_8.m_flow"][0],
            series["sample_branch.flow"][0],
        )

    def test_pneumatic_branch_spec_drives_closure_and_simulation(self) -> None:
        system = TestMqlSystem()
        spec = system.pneumatic_branch_spec(
            name="sample_branch",
            upstream_volume_alias="pn_general_chamber",
            orifice_alias="pn_orifice_18",
            downstream_volume_alias="pn_c1_8",
            source="manual-test",
        )

        closure = system.pneumatic_branch_closure_from_spec(spec)
        solution = system.simulate_pneumatic_branch_from_spec(
            spec,
            config=SolveIVPConfig(t_start=0.0, t_stop=1.0e-5, max_step=1.0e-6),
            t_eval=[0.0, 1.0e-5],
        )
        series = system.evaluate_pneumatic_branch_solution_from_spec(solution, spec)

        self.assertIs(closure.components.spec, spec)
        self.assertEqual(spec.source, "manual-test")
        self.assertEqual(len(solution.t), 2)
        self.assertIn("sample_branch.flow", series)
        self.assertGreater(series["sample_branch.flow"][0], 0.0)
        self.assertGreater(series["pn_general_chamber.p"][0], series["pn_general_chamber.p"][-1])
        self.assertLess(series["pn_c1_8.p"][0], series["pn_c1_8.p"][-1])

    def test_discover_pneumatic_branch_topology_reports_blocked_candidates(self) -> None:
        system = TestMqlSystem()

        discovery = system.discover_pneumatic_branch_topology()

        self.assertEqual(discovery.branch_specs, ())
        self.assertEqual(len(discovery.blocked_candidates), 48)
        candidates = {
            candidate.connection_alias: candidate
            for candidate in discovery.blocked_candidates
        }
        chamber_candidate = candidates["pneumatic_69"]
        self.assertEqual(chamber_candidate.line_submodel, "PNL0001")
        self.assertEqual(chamber_candidate.source_component, "pnnode4_16")
        self.assertEqual(chamber_candidate.target_component, "pn_c1_8")
        self.assertFalse(chamber_candidate.source_is_typed_pneumatic)
        self.assertTrue(chamber_candidate.target_is_typed_pneumatic)
        self.assertIn("node/line", chamber_candidate.reason)

        orifice_candidate = candidates["pneumatic_96"]
        self.assertEqual(orifice_candidate.line_submodel, "PNL0001")
        self.assertEqual(orifice_candidate.source_component, "pn_node3_8")
        self.assertEqual(orifice_candidate.target_component, "pn_orifice_18")
        self.assertFalse(orifice_candidate.source_is_typed_pneumatic)
        self.assertTrue(orifice_candidate.target_is_typed_pneumatic)
        self.assertIn("node/line", orifice_candidate.reason)

    def test_simulate_pneumatic_branch_rejects_invalid_component_aliases(self) -> None:
        system = TestMqlSystem()

        with self.assertRaises(TypeError):
            system.simulate_pneumatic_branch(
                name="invalid_branch",
                upstream_volume_alias="pn_brp2_8",
                orifice_alias="pn_orifice_18",
                downstream_volume_alias="pn_c1_8",
                config=SolveIVPConfig(t_start=0.0, t_stop=0.0),
            )


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