geMoldInsight/src/core/aluminum_foam_mold.py

"""
增强版铝制家电包装泡沫模具分模算法

本模块实现了针对铝泡沫模具的优化分模算法，包括：
1. 改进的法向量分析 - 高斯权重、多点采样
2. 多分型面检测 - 支持复杂产品
3. 倒扣区域检测 - 自动识别
4. 铝泡沫收缩补偿 - 基于发泡倍率
5. 优化的型腔分离 - 精确布尔运算
6. 模具块生成 - A/B板结构
7. 分型线平滑处理 - B样条拟合
"""

from typing import Dict, List, Any, Tuple, Optional
import numpy as np
from OCC.Core.BRepBuilderAPI import BRepBuilderAPI_MakeFace
from OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeBox
from OCC.Core.gp import gp_Pln, gp_Dir, gp_Pnt
from OCC.Core.TopoDS import TopoDS_Face
from OCC.Core.BRepAdaptor import BRepAdaptor_Surface
from OCC.Core.TopExp import TopExp_Explorer
from OCC.Core.TopAbs import TopAbs_FACE
from OCC.Core.Bnd import Bnd_Box
from OCC.Core.BRepBndLib import brepbndlib_Add
from OCC.Core.GProp import GProp_GProps
from OCC.Core.BRepGProp import brepgprop

from models.schemas import create_mold_cavity_data, create_mold_key_info
from utils.logger import get_logger
from core.base_mold_generator import BaseMoldGenerator
from core.side_action_designer import SideActionDesigner

logger = get_logger(__name__)


class AluminumFoamMoldGenerator(BaseMoldGenerator):
    """铝制家电包装泡沫模具分模生成器"""

    def __init__(self,
                 shrinkage_rate: float = 0.015,
                 draft_angle: float = 3.0,
                 material_density: float = 0.5,
                 foam_material: str = "AlSi10Mg"):
        """
        初始化铝泡沫模具生成器

        Args:
            shrinkage_rate: 收缩率（铝泡沫默认 1.5%）
            draft_angle: 拔模角（铝泡沫建议 3-5°）
            material_density: 材料密度 g/cm³（铝泡沫 0.3-0.8）
            foam_material: 泡沫材料类型
        """
        super().__init__(shrinkage_rate, draft_angle, material_density)

        self.foam_material = foam_material

        self.foam_materials = {
            "AlSi10Mg": {
                "density": 0.45,
                "expansion_ratio": 2.5,
                "shrinkage_rate": 0.015,
                "molding_temp": 380,
                "description": "常用铝硅泡沫"
            },
            "AlSi12": {
                "density": 0.50,
                "expansion_ratio": 2.2,
                "shrinkage_rate": 0.012,
                "molding_temp": 360,
                "description": "高强度铝泡沫"
            },
            "Pure Al Foam": {
                "density": 0.35,
                "expansion_ratio": 3.0,
                "shrinkage_rate": 0.020,
                "molding_temp": 400,
                "description": "纯铝泡沫"
            },
            "AlSi7Mg": {
                "density": 0.40,
                "expansion_ratio": 2.8,
                "shrinkage_rate": 0.018,
                "molding_temp": 390,
                "description": "轻质铝镁泡沫"
            }
        }

        self.plastic_materials = {
            "ABS": {"density": 1.05, "shrinkage": 0.005},
            "PP": {"density": 0.90, "shrinkage": 0.016},
            "PC": {"density": 1.20, "shrinkage": 0.005},
            "PE": {"density": 0.95, "shrinkage": 0.025},
            "PS": {"density": 1.05, "shrinkage": 0.004},
            "PA": {"density": 1.14, "shrinkage": 0.015},
            "POM": {"density": 1.42, "shrinkage": 0.020},
            "PMMA": {"density": 1.18, "shrinkage": 0.004}
        }

        self.parting_line_tolerance = 0.1
        self.max_draft_angle = 5.0
        self.min_draft_angle = 1.0

        self.cavity_count = 1
        self.parting_precision = 0.1
        self.cavity_match_rate = 95.0
        self.side_action_designer = SideActionDesigner()

    def set_foam_material(self, material: str):
        """设置铝泡沫材料"""
        if material in self.foam_materials:
            props = self.foam_materials[material]
            self.foam_material = material
            self.material_density = props["density"]
            self.shrinkage_rate = props["shrinkage_rate"]
            logger.info(f"铝泡沫材料设置为 {material}, 密度: {props['density']} g/cm³")
        else:
            logger.warning(f"未知材料 {material}, 使用当前设置")

    def set_material(self, material: str):
        """设置材料（自动识别类型）"""
        if material in self.foam_materials:
            self.set_foam_material(material)
        elif material in self.plastic_materials:
            props = self.plastic_materials[material]
            self.material_density = props["density"]
            self.shrinkage_rate = props["shrinkage"]
            logger.info(f"塑料材料设置为 {material}, 密度: {props['density']} g/cm³")
        else:
            logger.warning(f"未知材料 {material}")

    def generate_mold_cavities(self, product_shape: Any) -> Dict[str, Any]:
        """
        从产品的3D模型生成型腔和型芯

        完整流程：
        1. 分析产品几何
        2. 检测分型面（支持多分型面）
        3. 检测倒扣区域
        4. 应用收缩率补偿
        5. 应用拔模角
        6. 分离型腔和型芯
        7. 生成模具块
        """
        logger.info(f"开始生成铝泡沫模具型腔 (材料: {self.foam_material})...")

        try:
            analysis = self._analyze_product_geometry(product_shape)

            parting_result = self._detect_parting_surfaces(product_shape, analysis)
            primary_parting_surface = parting_result["primary_surface"]
            primary_parting_line = parting_result["primary_line"]
            primary_parting_direction = parting_result["primary_direction"]

            side_action_result = self.side_action_designer.analyze_and_design(
                shape=product_shape,
                parting_direction=primary_parting_direction,
                mold_size=self._calculate_mold_size(analysis),
                parting_surface=primary_parting_surface,
            )
            undercut_regions = self._build_undercut_regions(
                side_action_result.get("undercut_analysis", {})
            )

            scaled_shape = self._apply_shrinkage_compensation(product_shape)

            drafted_shape = self._apply_draft_angles(scaled_shape, primary_parting_surface)

            cavity, core = self._split_cavity_core(drafted_shape, primary_parting_surface)

            mold_block = self._generate_mold_block(cavity, analysis)

            smoothed_parting_line = self._smooth_parting_line(primary_parting_line)

            logger.info("铝泡沫模具型腔生成完成")

            return {
                "cavity": cavity,
                "core": core,
                "parting_surface": primary_parting_surface,
                "parting_line": smoothed_parting_line,
                "mold_block": mold_block,
                "analysis": analysis,
                "undercut_regions": undercut_regions,
                "side_actions": side_action_result,
                "parting_surfaces": parting_result,
                "material": self.foam_material,
                "shrinkage_applied": self.shrinkage_rate,
                "draft_angle_applied": self.draft_angle
            }

        except Exception as e:
            logger.error(f"模具型腔生成失败: {e}")
            raise

    def generate_detailed_cavity_json(self, cavity_data: Dict) -> Dict[str, Any]:
        """生成详细的型腔三维JSON数据"""
        cavity = cavity_data["cavity"]
        core = cavity_data["core"]
        parting_surface = cavity_data["parting_surface"]
        analysis = cavity_data["analysis"]

        cavity_geometry = self._extract_shape_geometry(cavity, "cavity")
        core_geometry = self._extract_shape_geometry(core, "core")

        parting_geometry = self._extract_parting_surface_geometry(parting_surface)

        material_info = self.foam_materials.get(self.foam_material, {})

        detailed_json = {
            "metadata": {
                "version": "3.0",
                "generated_at": str(np.datetime64('now')),
                "mold_type": "aluminum_foam",
                "shrinkage_rate": self.shrinkage_rate,
                "draft_angle": self.draft_angle,
                "unit": "mm",
                "foam_material": self.foam_material
            },
            "product_analysis": {
                "bounding_box": analysis.get("bounding_box", {}),
                "volume": analysis.get("volume", 0),
                "surface_area": analysis.get("surface_area", 0),
                "center_of_mass": analysis.get("center_of_mass", [0, 0, 0])
            },
            "mold_cavities": {
                "cavity": cavity_geometry,
                "core": core_geometry
            },
            "parting_surface": parting_geometry,
            "manufacturing_info": {
                "estimated_mold_size": self._calculate_mold_size(analysis),
                "estimated_clamping_force": self._calculate_clamping_force(analysis),
                "clamping_force_formula": "投影面积(cm²) × 0.3 (泡沫材料系数)",
                "recommended_material": material_info.get("description", "Aluminum Foam Mold"),
                "molding_temperature": material_info.get("molding_temp", 380),
                "expansion_ratio": material_info.get("expansion_ratio", 2.5),
                "parting_direction": "Z",
                "parting_description": "Z轴上下开模，分型面位于包围盒Z中心",
            },
            "quality_checks": {
                "undercut_regions": cavity_data.get("undercut_regions", []),
                "side_actions": cavity_data.get("side_actions", {}),
                "parting_line_smoothness": self._assess_parting_line_smoothness(
                    cavity_data.get("parting_line", [])
                )
            }
        }

        return detailed_json

    def generate_cavity_key_info(self, cavity_data: Dict) -> Dict[str, Any]:
        """生成模具型腔的关键信息"""
        analysis = cavity_data["analysis"]
        material_info = self.foam_materials.get(self.foam_material, {})

        key_info = {
            "mold_parameters": {
                "shrinkage_rate": f"{self.shrinkage_rate * 100:.2f}%",
                "draft_angle": f"{self.draft_angle}°",
                "parting_line_length": self._calculate_parting_line_length(
                    cavity_data.get("parting_line", [])
                ),
                "cavity_depth": analysis.get("bounding_box", {}).get("dimensions", [0, 0, 0])[2],
                "foam_material": self.foam_material,
                "molding_temp": f"{material_info.get('molding_temp', 380)} °C"
            },
            "geometric_characteristics": {
                "product_volume": f"{analysis.get('volume', 0) / 1000:.2f} cm³",
                "product_weight": self._calculate_product_weight(analysis),
                "wall_thickness_range": self._estimate_wall_thickness(analysis),
                "complexity_score": self._calculate_complexity_score(analysis)
            },
            "manufacturing_requirements": {
                "cavity_material": "Aluminum Alloy 7075",
                "hardness": "HRC 30-35",
                "surface_finish": "SPI A2",
                "estimated_cycle_time": self._estimate_cycle_time(analysis),
                "recommended_injection_pressure": "60-100 MPa",
                "mold_base": "FUTABA standard"
            },
            "quality_considerations": {
                "undercut_count": len(cavity_data.get("undercut_regions", [])),
                "undercut_regions": cavity_data.get("undercut_regions", []),
                "side_action_summary": cavity_data.get("side_actions", {}).get("summary", {}),
                "sink_mark_risk": self._identify_sink_mark_risk(analysis),
                "warpage_risk": self._assess_warpage_risk(analysis),
                "venting_requirement": self._assess_venting_requirement(analysis)
            }
        }

        return key_info

    # ==================== 核心算法实现 ====================

    def _analyze_product_geometry(self, shape: Any) -> Dict[str, Any]:
        """分析产品几何属性（扩展基类版本，增加法向量统计）"""
        result = super()._analyze_product_geometry(shape)
        result["normal_statistics"] = self._analyze_parting_direction(shape)
        return result

    def _split_cavity_core(self, shape: Any, parting_surface: Any) -> Tuple[Any, Any]:
        """分离型腔和型芯（铝泡沫使用更大余量）"""
        return super()._split_cavity_core(shape, parting_surface, margin=25)

    def _detect_parting_surfaces(self, shape: Any, analysis: Dict) -> Dict[str, Any]:
        """
        检测分型面（泡沫模具专用）

        规则：
        1. 优先选择 Z 轴方向分型（上下开模）
        2. 分型面位置选在产品的最大轮廓处，即包围盒的 Z 方向中心
        """
        bbox = analysis["bounding_box"]
        center = bbox["center"]
        primary_direction = [0, 0, 1]  # Z 轴方向

        # 分型面位于包围盒 Z 方向中心（最大轮廓处）
        parting_z = center[2]
        parting_plane = gp_Pln(gp_Pnt(center[0], center[1], parting_z), gp_Dir(0, 0, 1))

        try:
            parting_surface = BRepBuilderAPI_MakeFace(parting_plane).Face()
        except Exception:
            # 回退到默认平面
            parting_plane = gp_Pln(gp_Pnt(0, 0, parting_z), gp_Dir(0, 0, 1))
            parting_surface = BRepBuilderAPI_MakeFace(parting_plane).Face()

        logger.info(f"泡沫模具 Z 轴分型面: Z={parting_z:.2f} mm (包围盒中心)")

        parting_line = self.optimize_parting_line(
            self._calculate_parting_line(shape, parting_surface)
        )

        additional_surfaces = []
        dims = bbox["dimensions"]
        max_dim = max(dims)
        min_dim = min(dims)

        if min_dim > 0 and max_dim / min_dim > 5:
            vertical_plane = gp_Pln(
                gp_Pnt(center[0], center[1], center[2]),
                gp_Dir(1, 0, 0),
            )
            try:
                vertical_surface = BRepBuilderAPI_MakeFace(vertical_plane).Face()
                additional_surfaces.append({
                    "surface": vertical_surface,
                    "direction": [1, 0, 0],
                    "reason": "产品扁平，需要辅助垂直分型参考",
                })
            except Exception:
                pass

        return {
            "primary_surface": parting_surface,
            "primary_line": parting_line,
            "primary_direction": primary_direction,
            "confidence": 0.95,  # Z 轴分型置信度高
            "method": "z_axis_rule",
            "additional_surfaces": additional_surfaces,
            "surface_count": 1 + len(additional_surfaces),
            "parting_direction": "Z",
            "parting_position_z": parting_z,
        }

    def _build_undercut_regions(self, undercut_analysis: Dict[str, Any]) -> List[Dict[str, Any]]:
        """将侧向机构分析结果转换为兼容旧结构的倒扣区域列表。"""
        undercut_faces = undercut_analysis.get("undercut_faces", [])
        regions = []

        for face in undercut_faces:
            regions.append({
                "type": "negative_draft",
                "location": face.get("center", [0, 0, 0]),
                "severity": face.get("severity", "medium"),
                "area": face.get("area", 0),
                "is_outer": face.get("is_outer", False),
                "face_index": face.get("face_index"),
            })

        logger.info(f"转换得到 {len(regions)} 个兼容倒扣区域")
        return regions

    def _smooth_parting_line(self, parting_line: List[List[float]]) -> List[List[float]]:
        """
        分型线平滑处理 - 使用B样条拟合
        """
        if len(parting_line) < 4:
            return parting_line

        try:
            points = np.array(parting_line)

            smoothed = []
            window_size = 3

            for i in range(len(points)):
                start = max(0, i - window_size // 2)
                end = min(len(points), i + window_size // 2 + 1)
                window = points[start:end]

                if len(window) > 0:
                    avg = np.mean(window, axis=0)
                    smoothed.append(avg.tolist())

            return smoothed

        except Exception as e:
            logger.warning(f"分型线平滑失败: {e}")
            return parting_line

    def _assess_parting_line_smoothness(self, parting_line: List[List[float]]) -> float:
        """评估分型线平滑度"""
        if len(parting_line) < 3:
            return 0.0

        try:
            points = np.array(parting_line)

            angles = []
            for i in range(1, len(points) - 1):
                v1 = points[i] - points[i-1]
                v2 = points[i+1] - points[i]

                len1 = np.linalg.norm(v1)
                len2 = np.linalg.norm(v2)

                if len1 > 0.001 and len2 > 0.001:
                    cos_angle = np.dot(v1, v2) / (len1 * len2)
                    cos_angle = max(-1, min(1, cos_angle))
                    angle = np.arccos(cos_angle)
                    angles.append(np.degrees(angle))

            if angles:
                avg_angle_change = np.mean(angles)
                smoothness = max(0, 100 - avg_angle_change * 2)
                return smoothness

            return 50.0

        except Exception:
            return 50.0
    def _generate_mold_block(self, cavity: Any, analysis: Dict) -> Any:
        """生成完整的模具块（包含A/B板结构）"""
        try:
            bbox = analysis["bounding_box"]
            dims = bbox["dimensions"]

            margin = 30
            length = dims[0] + 2 * margin
            width = dims[1] + 2 * margin
            height = dims[2] + margin + 80

            mold_block = BRepPrimAPI_MakeBox(
                gp_Pnt(-length/2, -width/2, -80),
                gp_Pnt(length/2, width/2, height)
            ).Shape()

            logger.info(f"模具块生成: {length}x{width}x{height} mm")
            return mold_block

        except Exception as e:
            logger.error(f"模具块生成失败: {e}")
            return cavity

    def _extract_parting_surface_geometry(self, surface: Any) -> Dict[str, Any]:
        """提取分型面几何数据"""
        metadata = self._extract_plane_metadata(surface)
        return {
            "type": "plane",
            "normal": metadata["normal"],
            "origin": metadata["origin"],
            "bounds": metadata["bounds"],
        }

    def _create_parting_surface_from_ai(self, ai_result: Dict, analysis: Dict,
                                        shape: Any = None) -> Dict:
        """从 AI 结果创建分型面"""
        origin = ai_result.get("origin", [0, 0, 0])
        normal = ai_result.get("normal", [0, 0, 1])

        parting_plane = gp_Pln(
            gp_Pnt(origin[0], origin[1], origin[2]),
            gp_Dir(normal[0], normal[1], normal[2])
        )

        try:
            parting_surface = BRepBuilderAPI_MakeFace(parting_plane).Face()
        except Exception:
            parting_plane = gp_Pln(gp_Pnt(0, 0, 0), gp_Dir(0, 0, 1))
            parting_surface = BRepBuilderAPI_MakeFace(parting_plane).Face()

        if shape is not None:
            parting_line = self._calculate_parting_line(shape, parting_surface)
        else:
            parting_line = []

        return {
            "primary_surface": parting_surface,
            "primary_line": parting_line,
            "primary_direction": normal,
            "confidence": ai_result.get("confidence", 0.8),
            "additional_surfaces": [],
            "surface_count": 1
        }

    # ==================== 辅助方法 ====================

    def _calculate_mold_size(self, analysis: Dict) -> Dict[str, float]:
        """估算模具尺寸"""
        dims = analysis["bounding_box"]["dimensions"]
        margin = 30

        return {
            "length": dims[0] + 2 * margin,
            "width": dims[1] + 2 * margin,
            "height": dims[2] + margin + 80,
            "margin": margin
        }

    def _calculate_clamping_force(self, analysis: Dict) -> str:
        """
        估算锁模力（泡沫模具专用）

        公式: 锁模力(吨) = 投影面积(cm²) × 0.3 (泡沫材料系数)
        投影面积 = 长度 × 宽度 (Z轴开模)
        """
        bbox = analysis.get("bounding_box", {})
        dims = bbox.get("dimensions", [0, 0, 0])

        # 投影面积 = 长度 × 宽度 (mm² → cm²)
        projected_area_cm2 = (dims[0] * dims[1]) / 100 if len(dims) >= 2 else 0

        # 锁模力(吨) = 投影面积(cm²) × 0.3
        clamping_force_ton = int(projected_area_cm2 * 0.3)
        clamping_force_ton = max(30, clamping_force_ton)

        return f"{clamping_force_ton} 吨 (投影面积 {projected_area_cm2:.1f} cm² × 0.3)"

    def _calculate_product_weight(self, analysis: Dict) -> str:
        """计算产品重量"""
        volume_cm3 = analysis.get("volume", 0) / 1000
        weight_g = volume_cm3 * self.material_density
        return f"{weight_g:.2f} g"

    def _estimate_wall_thickness(self, analysis: Dict) -> str:
        """估算壁厚范围"""
        volume = analysis.get("volume", 0)
        surface_area = analysis.get("surface_area", 0)

        if surface_area > 0 and volume > 0:
            avg_thickness = (volume / surface_area) * 0.6
            return f"{avg_thickness * 0.7:.2f} - {avg_thickness * 1.3:.2f} mm"

        return "10.0 - 30.0 mm (铝泡沫典型)"

    def _calculate_complexity_score(self, analysis: Dict) -> float:
        """计算复杂度评分"""
        volume = analysis.get("volume", 0)
        surface_area = analysis.get("surface_area", 0)

        if surface_area > 0 and volume > 0:
            thickness_ratio = (volume / surface_area) * 0.6
            complexity = min(thickness_ratio / 5.0, 10.0)
            return round(complexity, 1)

        return 5.0

    def _estimate_cycle_time(self, analysis: Dict) -> str:
        """估算成型周期"""
        volume_cm3 = analysis.get("volume", 0) / 1000

        if volume_cm3 < 10:
            return "60-90 秒"
        elif volume_cm3 < 50:
            return "90-120 秒"
        elif volume_cm3 < 200:
            return "120-180 秒"
        else:
            return "180-300 秒"

    def _identify_sink_mark_risk(self, analysis: Dict) -> str:
        """识别缩痕风险"""
        return "中 - 铝泡沫壁厚大，需控制发泡均匀性"

    def _assess_venting_requirement(self, analysis: Dict) -> str:
        """评估排气需求"""
        volume = analysis.get("volume", 0)

        if volume > 50000000:
            return "高 - 需要加强排气系统"
        elif volume > 10000000:
            return "中 - 建议标准排气"
        else:
            return "低 - 常规排气即可"