#!/usr/bin/env python
# -*- coding: utf-8 -*-

import maya.cmds as cmds
import re
from Core import GetMeshes, GetBlendShapes, ProgressBar, SetBlendShapes

def batch_add_blend_shape(lod, meshes):
    """
    批量为指定LOD级别的模型添加混合变形目标
    
    参数:
        lod (int): LOD级别
        meshes (list): 要处理的网格体名称列表
    """
    # 获取指定LOD级别的所有网格体索引
    mesh_indices = GetMeshes(lod=lod)
    
    # 开始进度条
    ProgressBar(sp=True)
    
    for mesh_index in mesh_indices:
        mesh = GetMeshes(m=mesh_index)
        if cmds.objExists(mesh):
            lod_mesh = GetMeshes(i=mesh_index)
            # 使用正则表达式匹配第一个下划线前的内容
            head = re.match(r'[^_]+', lod_mesh).group(0)
            
            if head in meshes:
                blend_shape = f"{lod_mesh}_blendShapes"
                if not cmds.objExists(blend_shape):
                    # 创建混合变形节点
                    cmds.blendShape(mesh, automatic=True, name=blend_shape)
                    
                    # 根据不同的模型类型处理不同的目标数量
                    target_count_map = {
                        "head": 0,
                        "teeth": 1,
                        "saliva": 1,
                        "eyeLeft": 3,
                        "eyeRight": 4,
                        "eyeshell": 8,
                        "eyelashes": 8,
                        "eyeEdge": 8,
                        "cartilage": 8
                    }
                    
                    if head in target_count_map:
                        target_count = target_count_map[head]
                        count = GetBlendShapes(tc=target_count)
                        
                        # 设置进度条
                        ProgressBar(max_value=count)
                        ProgressBar(t=f"[{blend_shape}] Creating Target Mesh...")
                        
                        # 创建混合变形目标
                        for index in range(count):
                            ProgressBar(apr=1)
                            bs_name = GetBlendShapes(bsn=target_count, index=index)
                            
                            # 复制网格体作为目标
                            cmds.duplicate(mesh, returnRootsOnly=True, name=bs_name)
                            
                            # 对LOD0级别的特定模型设置混合变形目标
                            if lod == 0 and (head in ["head", "teeth", "cartilage"]):
                                SetBlendShapes(ct=mesh_index, index=index, target=bs_name)
                            
                            # 添加混合变形目标
                            cmds.blendShape(
                                blend_shape,
                                edit=True,
                                tangentSpace=True,
                                target=(mesh, index, bs_name, 1.0),
                                weight=(index, 0)
                            )
                            
                            # 删除临时目标模型
                            cmds.delete(bs_name)
    
    # 结束进度条
    ProgressBar(ep=True)