from __future__ import annotations

from pathlib import Path
import sys
import tempfile

from OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeBox

PROJECT_ROOT = Path(__file__).resolve().parent.parent
if str(PROJECT_ROOT) not in sys.path:
    sys.path.insert(0, str(PROJECT_ROOT))

from step_editor.model import StepModel
from step_editor.step_io import _write_step


DEFAULT_MODEL = PROJECT_ROOT / "assets" / "models" / "cube_10mm.step"


def _first_plane_face(model: StepModel) -> int:
    for face_id in range(len(model.faces)):
        info = model.face_info(face_id)
        if info.get("surface") == "plane":
            return face_id
    raise SystemExit("no plane Face found")


def _first_shell_face(model: StepModel, thickness: float, tolerance: float) -> int:
    candidates: list[tuple[int, int]] = []
    for face_id in range(len(model.faces)):
        info = model.feature_info(face_id)
        if info.get("surface") != "plane":
            continue
        if info.get("shell_region_status") != "candidate":
            continue
        current = float(info.get("shell_thickness_estimate") or 0.0)
        if abs(current - thickness) > tolerance:
            continue
        confidence_rank = {"high": 0, "medium": 1, "low": 2}.get(str(info.get("shell_confidence")), 3)
        candidates.append((confidence_rank, face_id))
    if not candidates:
        raise SystemExit(f"no shell thickness candidate near {thickness:g}")
    candidates.sort()
    return candidates[0][1]


def _assert_positive_target_blocked(label: str, plan: dict[str, object]) -> None:
    status = str(plan.get("status", ""))
    message = str(plan.get("message") or plan.get("blockers") or "")
    if status != "blocked":
        raise SystemExit(f"{label} invalid target was not blocked: status={status}, message={message}")
    if "大于 0" not in message and "大于0" not in message:
        raise SystemExit(f"{label} invalid target should explain the positive range: {message}")


def _assert_blocked(label: str, plan: dict[str, object]) -> None:
    status = str(plan.get("status", ""))
    message = str(plan.get("message") or plan.get("blockers") or "")
    if status != "blocked":
        raise SystemExit(f"{label} invalid target was not blocked: status={status}, message={message}")


def _run_cube_invalid_targets() -> None:
    model = StepModel.load(DEFAULT_MODEL)
    face_id = _first_plane_face(model)
    for target in (0.0, -1.0):
        _assert_positive_target_blocked(
            f"Face area current face target={target:g}",
            model.face_area_local_resize_plan(face_id, target),
        )
        _assert_positive_target_blocked(
            f"Face area owning feature target={target:g}",
            model.face_area_scale_plan(face_id, target),
        )
        for axis in ("width", "height"):
            _assert_positive_target_blocked(
                f"Face {axis} current face target={target:g}",
                model.face_size_local_resize_plan(face_id, target, axis),
            )
            _assert_positive_target_blocked(
                f"Face {axis} owning feature target={target:g}",
                model.face_size_owning_scale_plan(face_id, target, axis),
            )
    _assert_blocked("Face area current face non-numeric target", model.face_area_local_resize_plan(face_id, "abc"))
    _assert_blocked("Face area owning feature non-numeric target", model.face_area_scale_plan(face_id, "abc"))
    for axis in ("width", "height"):
        _assert_blocked(
            f"Face {axis} current face non-numeric target",
            model.face_size_local_resize_plan(face_id, "abc", axis),
        )
        _assert_blocked(
            f"Face {axis} owning feature non-numeric target",
            model.face_size_owning_scale_plan(face_id, "abc", axis),
        )


def _run_shell_invalid_targets() -> None:
    with tempfile.TemporaryDirectory(prefix="geom_param_face_invalid_shell_") as temp_dir:
        model_path = Path(temp_dir) / "plate.step"
        _write_step(BRepPrimAPI_MakeBox(30.0, 20.0, 2.0).Shape(), model_path)
        model = StepModel.load(model_path)
        face_id = _first_shell_face(model, 2.0, 2e-4)
        for target in (0.0, -1.0):
            _assert_positive_target_blocked(
                f"thin wall current face target={target:g}",
                model.shell_thickness_plan(face_id, target),
            )
            _assert_positive_target_blocked(
                f"thin wall owning feature target={target:g}",
                model.shell_thickness_owning_scale_plan(face_id, target),
            )
        _assert_blocked("thin wall current face non-numeric target", model.shell_thickness_plan(face_id, "abc"))
        _assert_blocked(
            "thin wall owning feature non-numeric target",
            model.shell_thickness_owning_scale_plan(face_id, "abc"),
        )


def main() -> int:
    _run_cube_invalid_targets()
    _run_shell_invalid_targets()
    print("Face invalid target guards ok")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())