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

import os
import sys
import maya.cmds as cmds
import maya.mel as mel
from config import data

# 根据Maya和Python版本获取正确的DNA模块路径
MAYA_VERSION = cmds.about(version=True)
SYSTEM_OS = "win64" if cmds.about(os=True) == "Windows" else "linux"
PYTHON_VERSION = sys.version_info

def load_dna_plugin():
    """加载DNA插件"""
    try:
        # 加载DNA校准插件
        dna_plugin = os.path.join(data.PLUGIN_PATH, "dnacalib.py")
        if not cmds.pluginInfo(dna_plugin, query=True, loaded=True):
            cmds.loadPlugin(dna_plugin)
            
        # 加载嵌入式插件
        embedded_plugin = os.path.join(data.PLUGIN_PATH, "embeddedRL4.mll")
        if not cmds.pluginInfo(embedded_plugin, query=True, loaded=True):
            cmds.loadPlugin(embedded_plugin)
            
        # 加载RBF插件
        rbf_plugin = os.path.join(data.PLUGIN_PATH, f"MayaUERBFPlugin.mll")
        if not cmds.pluginInfo(rbf_plugin, query=True, loaded=True):
            cmds.loadPlugin(rbf_plugin)
            
        return True
    except Exception as e:
        cmds.warning(f"加载DNA插件失败: {str(e)}")
        return False

def setup_dna_path():
    """设置DNA模块路径"""
    # 获取DNA插件路径
    if data.PLUGIN_PATH not in sys.path:
        sys.path.append(data.PLUGIN_PATH)
    
    # 获取PyDNA路径
    if data.PYDNA_PATH not in sys.path:
        sys.path.append(data.PYDNA_PATH)
            
    # 添加DLL搜索路径
    if SYSTEM_OS == "win64":
        os.environ["PATH"] = f"{data.PYDNA_PATH};{os.environ['PATH']}"

# 设置路径并加载插件
setup_dna_path()
if not load_dna_plugin():
    cmds.warning("DNA插件加载失败，某些功能可能无法使用")

try:
    import dna
    import dnacalib
except ImportError as e:
    cmds.warning(f"无法导入DNA模块: {str(e)}")
    cmds.warning(f"Python路径: {sys.path}")
    cmds.warning(f"插件路径: {data.PLUGIN_PATH}")
    cmds.warning(f"PyDNA路径: {data.PYDNA_PATH}")
    # 不抛出异常，让界面仍然可以加载
    dna = None
    dnacalib = None

class DNAManager:
    def __init__(self):
        self.current_dna = None
        self.reader = None
        self.writer = None
        
    def load_dna(self, file_path):
        """载入DNA文件"""
        try:
            if dna is None:
                raise ImportError("DNA模块未正确加载")
                
            # 创建DNA读取器
            self.reader = dna.DNAReader()
            self.reader.read(file_path)
            self.current_dna = self.reader.get_dna()
            return True
        except Exception as e:
            cmds.warning(f"DNA文件加载失败: {str(e)}")
            return False
            
    def save_dna(self, file_path):
        """保存DNA文件"""
        try:
            if not self.current_dna:
                raise ValueError("没有DNA数据可保存")
                
            # 创建DNA写入器
            self.writer = DNAWriter()
            self.writer.set_dna(self.current_dna)
            self.writer.write(file_path)
            return True
        except Exception as e:
            cmds.warning(f"DNA文件保存失败: {str(e)}")
            return False
            
    def calibrate_joints(self):
        """校准骨骼位置"""
        try:
            if not self.current_dna:
                raise ValueError("请先加载DNA文件")
                
            # 获取骨骼定义
            joints = self.current_dna.get_joints()
            
            # 校准每个骨骼
            for joint in joints:
                # 获取骨骼名称和位置
                joint_name = joint.get_name()
                neutral_position = joint.get_neutral_position()
                
                # 如果Maya场景中存在该骨骼
                if cmds.objExists(joint_name):
                    # 设置骨骼位置
                    cmds.xform(joint_name, 
                             worldSpace=True, 
                             translation=neutral_position)
                             
            return True
        except Exception as e:
            cmds.warning(f"骨骼校准失败: {str(e)}")
            return False
            
    def export_fbx(self, file_path):
        """导出FBX文件"""
        try:
            # 选择所有需要导出的对象
            all_objects = self.get_export_objects()
            cmds.select(all_objects)
            
            # 设置FBX导出选项
            mel.eval('FBXExportInputConnections -v true')
            mel.eval('FBXExportIncludeChildren -v true')
            
            # 导出FBX
            cmds.file(file_path, 
                     force=True, 
                     options="v=0", 
                     type="FBX export", 
                     preserveReferences=True, 
                     exportSelected=True)
            return True
        except Exception as e:
            cmds.warning(f"FBX导出失败: {str(e)}")
            return False
            
    def get_export_objects(self):
        """获取需要导出的对象列表"""
        # 获取模型、骨骼等对象
        objects = []
        if self.current_dna:
            # 添加骨骼
            joints = self.current_dna.get_joints()
            for joint in joints:
                joint_name = joint.get_name()
                if cmds.objExists(joint_name):
                    objects.append(joint_name)
                    
            # 添加蒙皮模型
            meshes = self.current_dna.get_meshes()
            for mesh in meshes:
                mesh_name = mesh.get_name()
                if cmds.objExists(mesh_name):
                    objects.append(mesh_name)
                    
        return objects