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

import maya.cmds as cmds
import maya.mel as mel

def blend_shape_mirror_target(direction, axis, target_ids, blend_shape):
    """
    镜像混合变形目标
    
    参数:
        direction (int): 镜像方向
        axis (int): 镜像轴向 (1=X, 2=Y, 3=Z, 4=Topology)
        target_ids (list): 要镜像的目标ID列表
        blend_shape (str): 混合变形节点名称
    """
    # 检查混合变形节点是否存在
    if not cmds.objExists(blend_shape):
        cmds.warning(f"No Exists BlendShape: {blend_shape}")
        return
    
    # 获取当前对称建模设置
    original_symmetry = cmds.symmetricModelling(query=True, symmetry=True)
    symmetry_space = None
    symmetry_axis = None
    
    if original_symmetry:
        symmetry_space = cmds.symmetricModelling(query=True, about=True)
        if symmetry_space == "topo":
            symmetry_axis = mel.eval('blendShapeGetTopoSymmetryEdge()')
        else:
            symmetry_axis = cmds.symmetricModelling(query=True, axis=True)
    
    # 获取几何体索引
    geometry_indices = cmds.blendShape(blend_shape, query=True, geometryIndices=True)
    
    # 构建命令字符串
    cmd_parts = []
    
    # 为每个几何体构建镜像命令
    for geometry in geometry_indices:
        cmd = f"blendShape -e "
        for target_id in target_ids:
            cmd += f"-mt {geometry} {target_id} "
        
        # 设置镜像方向
        cmd += f"-md {direction} "
        
        # 设置对称选项
        if axis == 4:
            cmd += "-ss 0 "
        else:
            cmd += "-ss 1 "
            if axis == 1:
                cmd += "-sa x "
            elif axis == 2:
                cmd += "-sa y "
            elif axis == 3:
                cmd += "-sa z "
        cmd += f"{blend_shape};"
        cmd_parts.append(cmd)
    
    # 添加对称设置恢复命令
    if not original_symmetry or not symmetry_axis:
        cmd_parts.append('symmetricModelling -s 0')
    elif symmetry_space == "topo":
        cmd_parts.append(f'symmetricModelling -e -about {symmetry_space} -s 1 {symmetry_axis}')
    else:
        cmd_parts.append(f'symmetricModelling -e -about {symmetry_space} -axis {symmetry_axis} -s 1')
    
    # 执行命令
    for cmd in cmd_parts:
        mel.eval(cmd)