"""Integration tests for OpenSees Example 2b nonlinear cantilever."""

from __future__ import annotations

import tempfile
from pathlib import Path

import pytest

pytest.importorskip("openseespy")

from otko.core import PushoverCase, TransientCase
from otko.services import load_project, save_project
from otko.services.opensees_runner import OpenSeesRunner

pytestmark = pytest.mark.slow


def _reload(proj, tmp_path):  # type: ignore[no-untyped-def]
    path = tmp_path / "ex2b_canti2d_inelastic_section.osmodel"
    save_project(proj, path)
    reloaded = load_project(path)
    reloaded.validate_references()
    return reloaded


def test_ex2b_canti2d_pushover_yields_and_softens(tmp_path) -> None:  # type: ignore[no-untyped-def]
    from examples.ex2b_canti2d_inelastic_section import (
        PUSH_STEP,
        PUSH_TARGET,
        build_ex2b_canti2d_inelastic_section,
    )

    proj = _reload(build_ex2b_canti2d_inelastic_section(), tmp_path)
    push_case = next(c for c in proj.analyses if isinstance(c, PushoverCase))
    result = OpenSeesRunner(proj).run(push_case)

    expected_pts = int(PUSH_TARGET / PUSH_STEP) + 1
    assert len(result.control_disp) == expected_pts
    assert result.control_disp[-1] == pytest.approx(PUSH_TARGET, rel=1e-6)

    # Nonlinear section should show a reduced post-yield tangent.
    early_slope = (result.base_shear[5] - result.base_shear[0]) / (
        result.control_disp[5] - result.control_disp[0]
    )
    late_slope = (result.base_shear[-1] - result.base_shear[-6]) / (
        result.control_disp[-1] - result.control_disp[-6]
    )
    assert early_slope > 5.0 * late_slope
    assert max(result.base_shear) > 0.0


def test_ex2b_canti2d_earthquake_runs_and_oscillates(tmp_path) -> None:  # type: ignore[no-untyped-def]
    from examples.ex2b_canti2d_inelastic_section import (
        ANALYSIS_DT,
        ANALYSIS_STEPS,
        build_ex2b_canti2d_inelastic_section,
    )

    proj = _reload(build_ex2b_canti2d_inelastic_section(), tmp_path)
    eq_case = next(c for c in proj.analyses if isinstance(c, TransientCase))

    results_dir = Path(tempfile.mkdtemp(prefix="ex2b_canti2d_eq_"))
    result = OpenSeesRunner(proj).run(eq_case, results_dir=results_dir)

    time = result.time()
    top = result.node_disp_history(2)
    ux = top[:, 0]
    uy = top[:, 1]

    assert len(time) == ANALYSIS_STEPS
    assert result.dt == pytest.approx(ANALYSIS_DT)
    assert ux.max() > 1e-4
    assert ux.min() < -1e-4
    assert max(abs(uy)) < 1.0