from __future__ import annotations

import unittest

from PythonModels.core.solver import SolveIVPConfig
from PythonModels.systems.test_mql import TestMqlSystem


class TestMqlPnl0001ChamberSegmentTests(unittest.TestCase):
    def setUp(self) -> None:
        self.system = TestMqlSystem()
        self.spec = self.system.discover_pneumatic_branch_topology().chamber_segment_specs[0]

    def test_system_assembles_all_twenty_physical_pnl0001_lines(self) -> None:
        self.assertEqual(self.system.typed_pnl0001_line_count, 20)
        self.assertIn("pneumatic_96", self.system.pnl0001_assembly.lines)

    def test_closure_inserts_topology_derived_inlet_line(self) -> None:
        closure = self.system.pnl0001_chamber_segment_closure_from_spec(
            self.spec,
            inlet_node_pressure_pa=16.0e6,
            outlet_pressure_pa=15.3e6,
        )

        snapshot = closure.snapshot()
        rhs = closure.rhs(closure.initial_state_vector())

        self.assertEqual(closure.components.inlet_line.name, "pneumatic_96")
        self.assertEqual(len(closure.initial_state_vector()), 4)
        self.assertEqual(len(rhs), 4)
        self.assertGreater(snapshot.node_to_line_flow, 0.0)
        self.assertAlmostEqual(snapshot.line_to_chamber_flow, 0.0, delta=1.0e-7)
        self.assertAlmostEqual(snapshot.outlet_flow, 0.0, delta=1.0e-7)
        self.assertAlmostEqual(rhs[0] + rhs[2], snapshot.node_to_line_flow)

    def test_internal_line_orifice_flow_cancels_from_total_mass_balance(self) -> None:
        closure = self.system.pnl0001_chamber_segment_closure_from_spec(
            self.spec,
            inlet_node_pressure_pa=15.3e6,
            outlet_pressure_pa=14.0e6,
        )
        state = closure.initial_state_vector()
        state[0] *= 1.01
        state[1] *= 1.01

        snapshot = closure.snapshot(state)
        rhs = closure.rhs(state)

        self.assertGreater(snapshot.line_to_chamber_flow, 0.0)
        self.assertAlmostEqual(
            rhs[0] + rhs[2],
            snapshot.node_to_line_flow - snapshot.outlet_flow,
            delta=1.0e-12,
        )
        self.assertAlmostEqual(
            closure.components.inlet_line.port_2.m_flow,
            -snapshot.line_to_chamber_flow,
        )

    def test_simulates_four_state_line_chamber_segment(self) -> None:
        solution = self.system.simulate_pnl0001_chamber_segment_from_spec(
            self.spec,
            inlet_node_pressure_pa=15.31e6,
            outlet_pressure_pa=15.29e6,
            config=SolveIVPConfig(
                t_start=0.0,
                t_stop=1.0e-7,
                max_step=1.0e-8,
            ),
            t_eval=[0.0, 5.0e-8, 1.0e-7],
        )

        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])


class TestMqlPnl0001PairChamberSegmentTests(unittest.TestCase):
    def setUp(self) -> None:
        self.system = TestMqlSystem()
        self.spec = self.system.discover_pneumatic_branch_topology().chamber_segment_specs[0]

    def test_pair_closure_uses_both_topology_derived_lines(self) -> None:
        closure = self.system.pnl0001_pair_chamber_segment_closure_from_spec(
            self.spec,
            inlet_node_pressure_pa=16.0e6,
            outlet_node_pressure_pa=14.0e6,
        )

        snapshot = closure.snapshot()
        rhs = closure.rhs(closure.initial_state_vector())

        self.assertEqual(closure.components.inlet_line.name, "pneumatic_96")
        self.assertEqual(closure.components.outlet_line.name, "pneumatic_97")
        self.assertEqual(len(closure.initial_state_vector()), 6)
        self.assertEqual(len(rhs), 6)
        self.assertGreater(snapshot.inlet_node_to_line_flow, 0.0)
        self.assertLess(snapshot.outlet_node_to_line_flow, 0.0)
        self.assertAlmostEqual(
            rhs[0] + rhs[2] + rhs[4],
            snapshot.inlet_node_to_line_flow + snapshot.outlet_node_to_line_flow,
            delta=1.0e-12,
        )

    def test_both_internal_orifice_flows_cancel_from_total_mass(self) -> None:
        closure = self.system.pnl0001_pair_chamber_segment_closure_from_spec(
            self.spec,
            inlet_node_pressure_pa=15.3e6,
            outlet_node_pressure_pa=15.3e6,
        )
        state = closure.initial_state_vector()
        state[0] *= 1.01
        state[1] *= 1.01
        state[4] *= 0.99
        state[5] *= 0.99

        snapshot = closure.snapshot(state)
        rhs = closure.rhs(state)

        self.assertGreater(snapshot.inlet_line_to_chamber_flow, 0.0)
        self.assertLess(snapshot.outlet_line_to_chamber_flow, 0.0)
        self.assertAlmostEqual(
            rhs[0] + rhs[2] + rhs[4],
            snapshot.inlet_node_to_line_flow + snapshot.outlet_node_to_line_flow,
            delta=1.0e-12,
        )
        self.assertAlmostEqual(
            closure.components.outlet_line.port_2.m_flow,
            -snapshot.outlet_line_to_chamber_flow,
        )

    def test_simulates_six_state_pair_line_chamber_segment(self) -> None:
        solution = self.system.simulate_pnl0001_pair_chamber_segment_from_spec(
            self.spec,
            inlet_node_pressure_pa=15.31e6,
            outlet_node_pressure_pa=15.29e6,
            config=SolveIVPConfig(
                t_start=0.0,
                t_stop=1.0e-7,
                max_step=1.0e-8,
            ),
            t_eval=[0.0, 5.0e-8, 1.0e-7],
        )

        self.assertTrue(solution.success)
        self.assertEqual(len(solution.t), 3)
        self.assertEqual(len(solution.y), 6)
        self.assertEqual([len(row) for row in solution.y], [3, 3, 3, 3, 3, 3])


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