Project02/AITrain/npc_dialogue_generator.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
游戏NPC角色对话生成器
基于微调后的LoRA模型生成角色对话
支持双模型对话系统，每个模型扮演一个角色
'''

import torch
import json
import random
from peft import PeftModel
from transformers import AutoModelForCausalLM, AutoTokenizer
from typing import Dict, List, Optional, Tuple
import platform
import os

# Windows multiprocessing兼容性修复
if platform.system() == "Windows":
    import multiprocessing
    multiprocessing.set_start_method('spawn', force=True)

class NPCDialogueGenerator:
    def __init__(self, base_model_path: str, lora_model_path: Optional[str] = None, external_character_data: Optional[Dict] = None):
        """
        初始化NPC对话生成器
        
        Args:
            base_model_path: 基础模型路径
            lora_model_path: LoRA模型路径（可选）
            external_character_data: 外部角色数据（可选，优先使用）
        """
        self.base_model_path = base_model_path
        self.lora_model_path = lora_model_path
        self.model = None
        self.tokenizer = None
        
        # 优先使用外部角色数据，如果没有则使用内置数据
        if external_character_data:
            self.character_profiles = self._process_external_character_data(external_character_data)
            print(f"✓ 使用外部角色数据: {list(self.character_profiles.keys())}")
        
        self._load_model()
    
    def _process_external_character_data(self, external_data: Dict) -> Dict:
        """
        处理外部角色数据，转换为对话生成器可用的格式
        
        Args:
            external_data: 来自knowledge_base的角色数据
            
        Returns:
            处理后的角色数据字典
        """
        processed_profiles = {}
        
        for char_name, char_data in external_data.items():
            # 提取基本信息
            basic_info = char_data.get('basic_info', {})
            personality = char_data.get('personality', {})
            background = char_data.get('background', {})
            skills = char_data.get('skills_and_abilities', {})
            speech_patterns = char_data.get('speech_patterns', {})
            
            # 构建角色画像
            profile = {
                "name": char_data.get('character_name', char_name),
                "title": basic_info.get('occupation', '未知'),
                "personality": personality.get('core_traits', []) + personality.get('strengths', []),
                "background": background.get('childhood', '') + ' ' + background.get('education', ''),
                "speech_patterns": speech_patterns.get('vocabulary', []) + speech_patterns.get('tone', []),
                "sample_dialogues": self._generate_sample_dialogues(char_data),
                # 保存完整数据供高级功能使用
                "full_data": char_data
            }
            
            processed_profiles[char_name] = profile
        
        return processed_profiles
    
    def _generate_sample_dialogues(self, char_data: Dict) -> List[str]:
        """
        基于角色数据生成示例对话
        
        Args:
            char_data: 角色数据
            
        Returns:
            示例对话列表
        """
        # 这里可以根据角色的性格、背景等生成更合适的示例对话
        # 暂时返回一些通用的示例
        basic_info = char_data.get('basic_info', {})
        occupation = basic_info.get('occupation', '角色')
        
        if '侦探' in occupation or '调查员' in occupation:
            return [
                "我需要仔细分析这个案件。",
                "每个细节都可能很重要。",
                "让我重新梳理一下线索。"
            ]
        elif '教授' in occupation or '博士' in occupation:
            return [
                "根据我的研究，这个现象很特殊。",
                "我们需要更谨慎地处理这个问题。",
                "知识就是力量，但也要小心使用。"
            ]
        else:
            return [
                "我遇到了一些困难。",
                "请帮帮我。",
                "这太奇怪了。"
            ]
    
    def _load_model(self):
        """加载模型和分词器"""
        print(f"Loading tokenizer from: {self.base_model_path}")
        self.tokenizer = AutoTokenizer.from_pretrained(
            self.base_model_path, 
            use_fast=False, 
            trust_remote_code=True
        )
        
        if self.tokenizer.pad_token is None:
            self.tokenizer.pad_token = self.tokenizer.eos_token
        
        print(f"Loading base model from: {self.base_model_path}")
        self.model = AutoModelForCausalLM.from_pretrained(
            self.base_model_path,
            device_map="auto",
            torch_dtype=torch.bfloat16,
            trust_remote_code=True
        )
        
        # 如果有LoRA模型，则加载
        if self.lora_model_path:
            print(f"Loading LoRA weights from: {self.lora_model_path}")
            self.model = PeftModel.from_pretrained(self.model, self.lora_model_path)
    
    def generate_character_dialogue(
        self, 
        character_name: str, 
        context: str = "", 
        user_input: str = "", 
        temperature: float = 0.8,
        max_new_tokens: int = 150,
        top_p: float = 0.9
    ) -> str:
        """
        生成指定角色的对话
        
        Args:
            character_name: 角色名称
            context: 对话上下文
            user_input: 用户输入/触发内容
            temperature: 采样温度
            max_new_tokens: 最大生成token数
            top_p: 核采样参数
            
        Returns:
            生成的对话内容
        """
        if character_name not in self.character_profiles:
            raise ValueError(f"Unknown character: {character_name}")
        
        profile = self.character_profiles[character_name]
        
        # 构建系统提示
        system_prompt = self._build_system_prompt(profile, context)
        
        # 构建用户输入
        if not user_input:
            user_input = "请说一段符合你角色设定的话。"
        
        # 准备消息
        messages = [
            {"role": "system", "content": system_prompt},
            {"role": "user", "content": user_input}
        ]
        
        # 应用对话模板
        inputs = self.tokenizer.apply_chat_template(
            messages,
            add_generation_prompt=True,
            tokenize=True,
            return_tensors="pt",
            return_dict=True,
            enable_thinking=False
        )
        
        # 移动到设备
        inputs = {k: v.to(self.model.device) for k, v in inputs.items()}
        
        # 生成对话
        with torch.no_grad():
            outputs = self.model.generate(
                **inputs,
                max_new_tokens=max_new_tokens,
                do_sample=True,
                temperature=temperature,
                top_p=top_p,
                pad_token_id=self.tokenizer.eos_token_id,
                repetition_penalty=1.1
            )
        
        # 解码输出
        response = outputs[0][inputs['input_ids'].shape[1]:]
        dialogue = self.tokenizer.decode(response, skip_special_tokens=True).strip()
        
        return dialogue
    
    def _build_system_prompt(self, profile: Dict, context: str = "") -> str:
        """构建系统提示"""
        personality_str = "、".join(profile["personality"])
        speech_pattern_str = "；".join(profile["speech_patterns"])
        
        system_prompt = f"""你是游戏中的NPC角色{profile["name"]}（{profile["title"]}）。
                    角色背景：{profile["background"]}
                    性格特点：{personality_str}
                    说话风格：{speech_pattern_str}
                    请严格按照这个角色的设定来回应，保持角色的一致性和独特性。"""
        if context:
            system_prompt += f"\n\n当前情境：{context}"
            return system_prompt

    def generate_dialogue_conversation(self, character1: str, character2: str, topic: str, turns: int = 4) -> List[Dict]:
        """生成两个角色之间的对话
        
        Args:
            character1: 第一个角色
            character2: 第二个角色
            topic: 对话主题
            turns: 对话轮数
            
        Returns:
            对话列表，每个元素包含speaker和dialogue
        """
        conversation = []
        context = f"现在{character1}和{character2}在讨论关于{topic}的话题。"
        
        for turn in range(turns):
            if turn % 2 == 0:
                # character1 说话
                speaker = character1
                if turn == 0:
                    user_input = f"开始和{character2}讨论{topic}这个话题。"
                else:
                    # 基于上一轮对话内容
                    last_dialogue = conversation[-1]["dialogue"]
                    user_input = f"{character2}刚才说：\"{last_dialogue}\"。请回应。"
            else:
                # character2 说话
                speaker = character2
                last_dialogue = conversation[-1]["dialogue"]
                user_input = f"{character1}刚才说：\"{last_dialogue}\"。请回应。"
            
            dialogue = self.generate_character_dialogue(
                speaker, context, user_input, temperature=0.8
            )
            
            conversation.append({
                "speaker": speaker,
                "dialogue": dialogue
            })
        
        return conversation

    def get_character_info(self, character_name: str) -> Dict:
        """获取角色信息"""
        return self.character_profiles.get(character_name, {})
        
    def list_available_characters(self) -> List[str]:
        """列出所有可用角色"""
        return list(self.character_profiles.keys())

class DualModelDialogueGenerator:
    """双模型对话生成器 - 每个模型扮演一个角色"""
    
    def __init__(self, 
                 base_model_path: str,
                 character1_config: Dict,
                 character2_config: Dict,
                 lora_model_path: Optional[str] = None):
        """
        初始化双模型对话生成器
        
        Args:
            base_model_path: 基础模型路径
            character1_config: 角色1配置 {"name": "角色名", "lora_path": "LoRA路径", "character_data": 角色数据}
            character2_config: 角色2配置 {"name": "角色名", "lora_path": "LoRA路径", "character_data": 角色数据}
            lora_model_path: 通用LoRA模型路径（可选）
        """
        self.base_model_path = base_model_path
        self.character1_config = character1_config
        self.character2_config = character2_config
        
        # 为每个角色创建独立的模型实例
        self.character1_generator = None
        self.character2_generator = None
        
        self._initialize_character_models()
    
    def _initialize_character_models(self):
        """初始化两个角色的模型"""
        print("=== 初始化双模型对话系统 ===")
        
        # 初始化角色1的模型
        print(f"\n初始化角色1: {self.character1_config['name']}")
        char1_lora_path = self.character1_config.get('lora_path') or self.character1_config.get('lora_model_path')
        self.character1_generator = NPCDialogueGenerator(
            self.base_model_path,
            char1_lora_path,
            {self.character1_config['name']: self.character1_config['character_data']}
        )
        
        # 初始化角色2的模型
        print(f"\n初始化角色2: {self.character2_config['name']}")
        char2_lora_path = self.character2_config.get('lora_path') or self.character2_config.get('lora_model_path')
        self.character2_generator = NPCDialogueGenerator(
            self.base_model_path,
            char2_lora_path,
            {self.character2_config['name']: self.character2_config['character_data']}
        )
        
        print("✓ 双模型对话系统初始化完成")
    
    def generate_dual_character_dialogue(self, 
                                       character_name: str,
                                       context: str = "",
                                       user_input: str = "",
                                       temperature: float = 0.8,
                                       max_new_tokens: int = 150) -> str:
        """
        生成指定角色的对话（使用对应的模型）
        
        Args:
            character_name: 角色名称
            context: 对话上下文
            user_input: 用户输入
            temperature: 采样温度
            max_new_tokens: 最大生成token数
            
        Returns:
            生成的对话内容
        """
        if character_name == self.character1_config['name']:
            return self.character1_generator.generate_character_dialogue(
                character_name, context, user_input, temperature, max_new_tokens
            )
        elif character_name == self.character2_config['name']:
            return self.character2_generator.generate_character_dialogue(
                character_name, context, user_input, temperature, max_new_tokens
            )
        else:
            raise ValueError(f"Unknown character: {character_name}")
    
    def run_dual_character_conversation(self, 
                                      topic: str = "",
                                      turns: int = 4,
                                      context: str = "",
                                      temperature: float = 0.8,
                                      max_new_tokens: int = 150) -> List[Dict]:
        """
        运行双角色对话
        
        Args:
            topic: 对话主题
            turns: 对话轮数
            context: 额外上下文
            temperature: 采样温度
            max_new_tokens: 最大生成token数
            
        Returns:
            对话列表
        """
        conversation = []
        char1_name = self.character1_config['name']
        char2_name = self.character2_config['name']
        
        # 构建完整上下文
        full_context = f"现在{char1_name}和{char2_name}在讨论关于{topic}的话题。{context}"
        
        print(f"\n=== 开始双角色对话 ===")
        print(f"主题: {topic}")
        print(f"角色: {char1_name} vs {char2_name}")
        print(f"轮数: {turns}")
        print("-" * 50)
        
        for turn in range(turns):
            if turn % 2 == 0:
                # 角色1说话
                speaker = char1_name
                if turn == 0:
                    user_input = f"开始和{char2_name}讨论{topic}这个话题。"
                else:
                    last_dialogue = conversation[-1]["dialogue"]
                    user_input = f"{char2_name}刚才说：\"{last_dialogue}\"。请回应。"
            else:
                # 角色2说话
                speaker = char2_name
                last_dialogue = conversation[-1]["dialogue"]
                user_input = f"{char1_name}刚才说：\"{last_dialogue}\"。请回应。"
            
            print(f"\n[第{turn+1}轮] {speaker}正在思考...")
            
            # 使用对应角色的模型生成对话
            dialogue = self.generate_dual_character_dialogue(
                speaker, full_context, user_input, temperature, max_new_tokens
            )
            
            conversation.append({
                "turn": turn + 1,
                "speaker": speaker,
                "dialogue": dialogue,
                "context_used": full_context[:100] + "..." if len(full_context) > 100 else full_context
            })
            
            print(f"{speaker}: {dialogue}")
        
        print("-" * 50)
        print("✓ 双角色对话完成")
        
        return conversation
    
    def get_character_info(self, character_name: str) -> Dict:
        """获取角色信息"""
        if character_name == self.character1_config['name']:
            return self.character1_generator.get_character_info(character_name)
        elif character_name == self.character2_config['name']:
            return self.character2_generator.get_character_info(character_name)
        else:
            return {}
    
    def list_characters(self) -> List[str]:
        """列出两个角色名称"""
        return [self.character1_config['name'], self.character2_config['name']]

def main():
    """测试对话生成器"""
    # 配置路径
    base_model_path = '/mnt/g/Project02/AITrain/Qwen/Qwen3-8B-AWQ'
    lora_model_path = './output/NPC_Dialogue_LoRA/final_model'  # 如果没有训练LoRA，设为None
    
    # 检查LoRA模型是否存在
    if not os.path.exists(lora_model_path):
        print("LoRA模型不存在，使用基础模型")
        lora_model_path = None
    
    # 创建对话生成器
    generator = NPCDialogueGenerator(base_model_path, lora_model_path)
    
    print("=== 游戏NPC角色对话生成器 ===")
    print(f"可用角色：{', '.join(generator.list_available_characters())}")
    
    # 测试单个角色对话生成
    print("\n=== 单角色对话测试 ===")
    test_scenarios = [
        {
            "character": "克莱恩",
            "context": "玩家向你咨询神秘学知识",
            "input": "请告诉我一些关于灵界的注意事项。"
        },
        {
            "character": "阿兹克",
            "context": "学生遇到了修炼瓶颈",
            "input": "导师，我在修炼中遇到了困难。"
        },
        {
            "character": "塔利姆",
            "context": "在俱乐部偶遇老朋友",
            "input": "好久不见，最近怎么样？"
        }
    ]
    
    for scenario in test_scenarios:
        print(f"\n--- {scenario['character']} ---")
        print(f"情境：{scenario['context']}")
        print(f"输入：{scenario['input']}")
        
        dialogue = generator.generate_character_dialogue(
            scenario["character"],
            scenario["context"],
            scenario["input"]
        )
        print(f"回复：{dialogue}")
    
    # 测试角色间对话
    print("\n=== 角色间对话测试 ===")
    conversation = generator.generate_dialogue_conversation(
        "克莱恩", "塔利姆", "最近遇到的神秘事件", turns=4
    )
    
    for turn in conversation:
        print(f"{turn['speaker']}：{turn['dialogue']}")
    
    # 交互式对话模式
    print("\n=== 交互式对话模式 ===")
    print("输入格式：角色名 上下文 用户输入")
    print("例如：克莱恩 在俱乐部 请给我一些建议")
    print("输入'quit'退出")
    
    while True:
        try:
            user_command = input("\n请输入指令: ").strip()
            if user_command.lower() == 'quit':
                break
            
            parts = user_command.split(' ', 2)
            if len(parts) < 2:
                print("格式错误，请使用：角色名 上下文 [用户输入]")
                continue
            
            character = parts[0]
            context = parts[1]
            user_input = parts[2] if len(parts) > 2 else ""
            
            if character not in generator.list_available_characters():
                print(f"未知角色：{character}")
                print(f"可用角色：{', '.join(generator.list_available_characters())}")
                continue
            
            dialogue = generator.generate_character_dialogue(
                character, context, user_input
            )
            print(f"\n{character}：{dialogue}")
            
        except KeyboardInterrupt:
            break
        except Exception as e:
            print(f"生成对话时出错：{e}")
    
    print("\n对话生成器已退出")

if __name__ == '__main__':
    main()