"""Unit tests for the script exporter (services.export).

The exporter drives OpenSeesRunner with a RecordingOps stand-in and
renders the captured calls as OpenSeesPy / Tcl. No solver, no Qt.
"""

from __future__ import annotations

from pathlib import Path

import pytest

from otko import __version__
from otko.core import (
    ElasticBeamColumn,
    ElasticIsotropic,
    ElasticSection,
    LinearTimeSeries,
    NodalLoad,
    Node,
    PathTimeSeries,
    PlainLoadPattern,
    Project,
    StaticCase,
    Steel01,
    TrussElement,
)
from otko.services.export import (
    PINNED_OPENSEESPY,
    RecordingOps,
    _render_opspy,
    _render_tcl,
    export_opspy,
    export_tcl,
)


# ───────────────────────── fixtures ─────────────────────────
def _truss_2d() -> Project:
    """2D truss + Linear pattern + StaticCase #1."""
    return Project(
        ndm=2,
        ndf=2,
        nodes=[
            Node(id=1, coords=(0, 0, 0), restraint=(True, True, False, False, False, False)),
            Node(id=2, coords=(4, 0, 0), restraint=(False, True, False, False, False, False)),
            Node(id=3, coords=(2, 3, 0)),
        ],
        materials=[Steel01(id=1, Fy=420e6, E0=200e9, b=0.01)],
        elements=[
            TrussElement(id=1, nodes=(1, 3), area=1e-3, material_id=1),
            TrussElement(id=2, nodes=(2, 3), area=1e-3, material_id=1),
        ],
        time_series=[LinearTimeSeries(id=1)],
        load_patterns=[
            PlainLoadPattern(
                id=1,
                time_series_id=1,
                nodal_loads=[NodalLoad(node_id=3, forces=(0, -1000, 0, 0, 0, 0))],
            )
        ],
        analyses=[StaticCase(id=1, name="push", pattern_ids=[1])],
    )


def _frame_3d() -> Project:
    """3D cantilever column (exercises geomTransf tags)."""
    return Project(
        ndm=3,
        ndf=6,
        nodes=[
            Node(
                id=1,
                coords=(0, 0, 0),
                restraint=(True, True, True, True, True, True),
            ),
            Node(id=2, coords=(0, 0, 3)),
        ],
        materials=[ElasticIsotropic(id=1, E=200e9, nu=0.3)],
        sections=[ElasticSection(id=1, E=200e9, A=0.01, Iz=1e-4, Iy=1e-4, G=80e9, J=1e-6)],
        elements=[ElasticBeamColumn(id=1, nodes=(1, 2), section_id=1)],
    )


def _path_series_project() -> Project:
    """Single truss + PathTimeSeries(dt) + StaticCase."""
    return Project(
        ndm=2,
        ndf=2,
        nodes=[
            Node(id=1, coords=(0, 0, 0), restraint=(True, True, False, False, False, False)),
            Node(id=2, coords=(1, 0, 0)),
        ],
        materials=[Steel01(id=1, Fy=250e6, E0=200e9, b=0.01)],
        elements=[TrussElement(id=1, nodes=(1, 2), area=1e-3, material_id=1)],
        time_series=[PathTimeSeries(id=7, dt=0.02, values=[0.0, 1.0, 0.5], factor=2.0)],
        load_patterns=[
            PlainLoadPattern(
                id=1,
                time_series_id=7,
                nodal_loads=[NodalLoad(node_id=2, forces=(100, 0, 0, 0, 0, 0))],
            )
        ],
        analyses=[StaticCase(id=1, name="transient-prep", pattern_ids=[1])],
    )


# ───────────────────────── header ─────────────────────────
class TestHeader:
    def test_opspy_header_pins_solver_version_and_units(self) -> None:
        script = export_opspy(_truss_2d())
        assert PINNED_OPENSEESPY == "openseespy==3.8.0.0"
        assert "openseespy==3.8.0.0" in script
        assert __version__ in script
        assert _truss_2d().meta.units.value in script

    def test_tcl_header_pins_solver_version_and_units(self) -> None:
        script = export_tcl(_truss_2d())
        assert "openseespy==3.8.0.0" in script
        assert __version__ in script


# ───────────────────────── model-only ─────────────────────────
class TestModelOnly:
    def test_opspy_model_only_commands(self) -> None:
        script = export_opspy(_truss_2d())
        assert "import openseespy.opensees as ops" in script
        assert "ops.wipe()" in script
        assert script.index("ops.wipe()") < script.index("ops.model(")
        assert 'ops.model("basic", "-ndm", 2, "-ndf", 2)' in script
        assert "ops.node(1, 0.0, 0.0)" in script
        assert "ops.fix(1, 1, 1)" in script
        assert 'ops.uniaxialMaterial("Steel01", 1,' in script
        assert 'ops.element("truss", 1,' in script
        # Model-only scope: no patterns, no analysis.
        assert "ops.pattern(" not in script
        assert "ops.analyze(" not in script
        assert "model only" in script

    def test_tcl_model_only_commands(self) -> None:
        script = export_tcl(_truss_2d())
        lines = script.splitlines()
        assert "wipe" in lines
        assert "model basic -ndm 2 -ndf 2" in lines
        assert "node 1 0.0 0.0" in lines
        assert "fix 1 1 1" in lines
        assert any(line.startswith("uniaxialMaterial Steel01 1 ") for line in lines)
        assert any(line.startswith("element truss 1 ") for line in lines)
        assert not any(line.startswith("pattern ") for line in lines)

    def test_no_query_commands_leak(self) -> None:
        script = export_opspy(_truss_2d(), case_id=1)
        for banned in ("nodeDisp", "nodeReaction", "eleResponse", "eleForce", "reactions"):
            assert banned not in script


# ───────────────────────── with case ─────────────────────────
class TestWithCase:
    def test_opspy_static_case_appends_analysis(self) -> None:
        script = export_opspy(_truss_2d(), case_id=1)
        assert 'ops.timeSeries("Linear", 1, "-factor", 1.0)' in script
        assert 'ops.pattern("Plain", 1, 1)' in script
        assert "ops.load(3, 0.0, -1000.0)" in script
        assert "ops.system(" in script
        assert "ops.analyze(1)" in script
        assert "Static case #1" in script

    def test_tcl_static_case_appends_analysis(self) -> None:
        script = export_tcl(_truss_2d(), case_id=1)
        assert "timeSeries Linear 1 -factor 1.0" in script
        assert "pattern Plain 1 1" in script
        assert "load 3 0.0 -1000.0" in script
        assert "analyze 1" in script

    def test_unknown_case_id_raises(self) -> None:
        with pytest.raises(ValueError, match="999"):
            export_opspy(_truss_2d(), case_id=999)
        with pytest.raises(ValueError, match="999"):
            export_tcl(_truss_2d(), case_id=999)


# ───────────────────────── gotchas ─────────────────────────
class TestGotchas:
    def test_path_timeseries_dt_preserved(self) -> None:
        py = export_opspy(_path_series_project(), case_id=1)
        tcl = export_tcl(_path_series_project(), case_id=1)
        assert '"Path", 7, "-dt", 0.02' in py
        assert "timeSeries Path 7 -dt 0.02" in tcl

    def test_geomtransf_tags_preserved(self) -> None:
        py = export_opspy(_frame_3d())
        tcl = export_tcl(_frame_3d())
        assert 'ops.geomTransf("Linear", 1, 1.0, 0.0, 0.0)' in py
        assert 'ops.element("elasticBeamColumn", 1, 1, 2, 1, 1,' in py
        assert "geomTransf Linear 1 1.0 0.0 0.0" in tcl
        assert "element elasticBeamColumn 1 1 2 1 1" in tcl

    def test_fix_uses_dof_subset(self) -> None:
        """2D-frame (ndf=3) fix emits exactly (Ux, Uy, Rz)."""
        proj = Project(
            ndm=2,
            ndf=3,
            nodes=[
                Node(
                    id=1,
                    coords=(0, 0, 0),
                    restraint=(True, True, False, False, False, True),
                ),
                Node(id=2, coords=(0, 3, 0)),
            ],
            sections=[ElasticSection(id=1, E=200e9, A=0.01, Iz=1e-4)],
            elements=[ElasticBeamColumn(id=1, nodes=(1, 2), section_id=1)],
        )
        assert "ops.fix(1, 1, 1, 1)" in export_opspy(proj)
        assert "fix 1 1 1 1" in export_tcl(proj).splitlines()


# ───────────────────────── unsupported ─────────────────────────
class TestUnsupported:
    def test_unknown_op_raises_with_marker(self) -> None:
        rec = RecordingOps()
        rec.someFutureCommand(1, 2)
        with pytest.raises(NotImplementedError, match="UNSUPPORTED"):
            _render_opspy(rec.calls, _truss_2d(), None)
        with pytest.raises(NotImplementedError, match="UNSUPPORTED"):
            _render_tcl(rec.calls, _truss_2d(), None)

    def test_no_top_level_openseespy_import(self) -> None:
        """services.export and the touched views must not import openseespy."""
        import re

        pattern = re.compile(r"^\s*(import|from)\s+openseespy", re.MULTILINE)
        root = Path(__file__).resolve().parents[2]
        for rel in (
            "src/otko/services/export.py",
            "src/otko/views/menu_builder.py",
            "src/otko/views/action_handlers.py",
        ):
            text = (root / rel).read_text(encoding="utf-8")
            assert pattern.search(text) is None, rel