"""Generator 公共接口契约测试（技术债计划 P2-⑩）。

BaseMoldGenerator 的公共契约原先以 `_` 私有方法形式暴露给 MultiSchemeMoldPlanner，
本文件锁定提取后的公共接口：方法存在性、参数覆写行为、废弃入口告警，
并用真实几何（OCC box）走一遍 generate_plan 集成路径。

OCC（pythonocc）仅 conda 环境提供（本地 gemold / 服务器 py_3.12），
无 OCC 的环境自动跳过本文件，不影响其余测试。
"""

import pytest

pytest.importorskip("OCC.Core.BRepPrimAPI", reason="需要 pythonocc 运行生成器契约测试")

from OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeBox
from OCC.Core.gp import gp_Pnt

from moldinsight.core.aluminum_foam_mold import AluminumFoamMoldGenerator
from moldinsight.core.base_mold_generator import BaseMoldGenerator
from moldinsight.core.mold_generator import MoldCavityGenerator
from moldinsight.core.multi_scheme_planner import MultiSchemeMoldPlanner
from moldinsight.services.material_service import MaterialService

# BaseMoldGenerator 上的公共契约（含子类必须可调用的基类默认实现）
BASE_CONTRACT_METHODS = (
    "analyze_product_geometry",
    "apply_shrinkage_compensation",
    "apply_draft_angles",
    "split_cavity_core",
    "create_mold_block",
    "split_mold_block_by_plane",
    "get_parting_plane",
    "get_face_normal",
    "calculate_parting_line",
    "apply_process_params",
)

# 两个子类共同实现的完整契约
SUBCLASS_CONTRACT_METHODS = BASE_CONTRACT_METHODS + (
    "calculate_mold_size",
    "build_undercut_regions",
    "set_material",
    "side_action_designer",
    "generate_detailed_cavity_json",
    "generate_cavity_key_info",
    "generate_mold_cavities",  # 已废弃但保留兼容
)


def _box(dx=50.0, dy=40.0, dz=30.0):
    return BRepPrimAPI_MakeBox(
        gp_Pnt(-dx / 2, -dy / 2, -dz / 2), gp_Pnt(dx / 2, dy / 2, dz / 2)
    ).Shape()


@pytest.mark.parametrize("method", SUBCLASS_CONTRACT_METHODS)
@pytest.mark.parametrize(
    "generator_cls", [MoldCavityGenerator, AluminumFoamMoldGenerator]
)
def test_generator_exposes_public_contract(generator_cls, method):
    generator = generator_cls()
    attr = getattr(generator, method, None)
    assert attr is not None, f"{generator_cls.__name__} 缺少公共接口 {method}"
    assert callable(attr) or isinstance(attr, object)


def test_foam_generator_implements_generate_mold_block():
    assert callable(AluminumFoamMoldGenerator().generate_mold_block)


def test_base_generate_mold_block_is_not_implemented():
    with pytest.raises(NotImplementedError):
        BaseMoldGenerator().generate_mold_block(None, {})


def test_apply_process_params_overrides_generator_state():
    generator = MoldCavityGenerator(shrinkage_rate=0.005, draft_angle=2.0)
    material = MaterialService.get_material("ABS")

    generator.apply_process_params(
        material,
        {
            "draft_angle": 1.5,
            "shrinkage_rate": 1.2,  # 百分数
            "parting_precision": 0.05,
            "cavity_match": 97.0,
        },
    )

    assert generator.draft_angle == pytest.approx(1.5)
    assert generator.shrinkage_rate == pytest.approx(0.012)
    assert generator.parting_line_tolerance == pytest.approx(0.05)
    assert generator.cavity_match_rate == pytest.approx(97.0)


def test_apply_process_params_defaults_to_material_shrinkage():
    generator = MoldCavityGenerator(shrinkage_rate=0.005, draft_angle=2.0)
    material = MaterialService.get_material("PP")  # shrinkage 0.016

    generator.apply_process_params(material, None)

    assert generator.shrinkage_rate == pytest.approx(0.016)
    assert generator.draft_angle == pytest.approx(2.0)


def test_generate_mold_cavities_is_deprecated():
    generator = MoldCavityGenerator()

    with pytest.warns(DeprecationWarning):
        result = generator.generate_mold_cavities(_box())

    assert result["cavity"] is not None
    assert result["core"] is not None


def test_planner_generate_plan_injection_box():
    planner = MultiSchemeMoldPlanner()

    plan = planner.generate_plan(
        _box(),
        MaterialService.get_material("ABS"),
        is_foam_material=False,
        max_schemes=2,
    )

    schemes = plan["candidate_schemes"]
    assert 1 <= len(schemes) <= 2
    assert plan["best_scheme_id"] == schemes[0]["scheme_id"]

    best = schemes[0]
    assert best["cavity_data"]["mold_cavities"]["cavity"]["vertex_count"] > 0
    assert best["cavity_data"]["mold_cavities"]["core"]["vertex_count"] > 0
    assert best["cavity_data"]["metadata"]["scheme_id"] == best["scheme_id"]
    assert best["parting"]["line"]

    export_shapes = plan["_export_shapes"][best["scheme_id"]]
    assert export_shapes["cavity"] is not None
    assert export_shapes["product"] is not None


def test_planner_generate_plan_foam_box():
    planner = MultiSchemeMoldPlanner()

    plan = planner.generate_plan(
        _box(120, 100, 60),
        MaterialService.get_material("AlSi10Mg"),
        is_foam_material=True,
        max_schemes=1,
    )

    best = plan["candidate_schemes"][0]
    assert plan["best_scheme_id"] == best["scheme_id"]
    # 泡沫材料优先 Z 轴上下开模
    assert best["axis"] == "Z"
    assert best["cavity_data"]["metadata"]["foam_material"] == "AlSi10Mg"
    assert best["cavity_data"]["mold_cavities"]["cavity"]["vertex_count"] > 0

    export_shapes = plan["_export_shapes"][best["scheme_id"]]
    assert export_shapes["cavity"] is not None