'''
方法知识获取模块
1. 输入：问题 + 帖子信息 + 账号人设信息
2. 将输入的问题转化成query，调用大模型，prompt在 function_knowledge_generate_query_prompt.md 中
3. 从已有方法工具库中尝试选择合适的方法工具（调用大模型执行，prompt在 function_knowledge_select_tools_prompt.md 中），如果有，则返回选择的方法工具，否则：
    - 调用 multi_search_knowledge.py 获取知识
    - 返回新的方法工具知识
    - 异步从新方法知识中获取新工具(调用大模型执行，prompt在 function_knowledge_generate_new_tool_prompt.md 中)，调用工具库系统，接入新的工具
4. 调用选择的方法工具执行验证，返回工具执行结果
'''

import os
import sys
import json
import threading
from loguru import logger

# 设置路径以便导入工具类
current_dir = os.path.dirname(os.path.abspath(__file__))
root_dir = os.path.dirname(current_dir)
sys.path.insert(0, root_dir)

from utils.gemini_client import generate_text
from knowledge_v2.tools_library import call_tool, save_tool_info, get_all_tool_infos, get_tool_info
from knowledge_v2.multi_search_knowledge import get_knowledge as get_multi_search_knowledge
from knowledge_v2.cache_manager import CacheManager

class FunctionKnowledge:
    """方法知识获取类"""
    
    def __init__(self, use_cache: bool = True):
        """
        初始化
        
        Args:
            use_cache: 是否启用缓存，默认启用
        """
        logger.info("=" * 80)
        logger.info("初始化 FunctionKnowledge - 方法知识获取入口")
        self.prompt_dir = os.path.join(current_dir, "prompt")
        self.use_cache = use_cache
        self.cache = CacheManager() if use_cache else None
        logger.info(f"缓存状态: {'启用' if use_cache else '禁用'}")
        logger.info("=" * 80)
        
    def _load_prompt(self, filename: str) -> str:
        """加载prompt文件内容"""
        prompt_path = os.path.join(self.prompt_dir, filename)
        if not os.path.exists(prompt_path):
            raise FileNotFoundError(f"Prompt文件不存在: {prompt_path}")
        with open(prompt_path, 'r', encoding='utf-8') as f:
            return f.read().strip()

    def generate_query(self, question: str, post_info: str, persona_info: str) -> tuple:
        """
        生成查询语句
        
        Returns:
            tuple: (query, detail_info)
            - query: 生成的查询语句
            - detail_info: 详细信息dict，包含prompt和response
        """
        logger.info(f"[步骤1] 生成Query...")
        
        # 组合问题的唯一标识
        combined_question = f"{question}||{post_info}||{persona_info}"
        
        detail_info = {"cached": False, "prompt": None, "response": None}
        
        # 尝试从缓存读取
        if self.use_cache:
            cached_query = self.cache.get(combined_question, 'function_knowledge', 'generated_query.txt')
            if cached_query:
                logger.info(f"✓ 使用缓存的Query: {cached_query}")
                detail_info["cached"] = True
                return cached_query, detail_info
        
        try:
            prompt_template = self._load_prompt("function_generate_query_prompt.md")
            prompt = prompt_template.format(
                question=question,
                post_info=post_info,
                persona_info=persona_info
            )
            
            detail_info["prompt"] = prompt
            
            logger.info("→ 调用Gemini生成Query...")
            query = generate_text(prompt=prompt)
            query = query.strip()
            
            detail_info["response"] = query
            
            logger.info(f"✓ 生成Query: {query}")
            
            # 写入缓存
            if self.use_cache:
                self.cache.set(combined_question, 'function_knowledge', 'generated_query.txt', query)
            
            return query, detail_info
        except Exception as e:
            logger.error(f"✗ 生成Query失败: {e}")
            detail_info["error"] = str(e)
            return question, detail_info  # 降级使用原问题

    def select_tool(self, combined_question: str, query: str) -> tuple:
        """
        选择合适的工具
        
        Returns:
            tuple: (tool_name, detail_info)
        """
        logger.info(f"[步骤2] 选择工具...")
        
        detail_info = {"cached": False, "prompt": None, "response": None, "available_tools_count": 0}
        
        # 尝试从缓存读取
        if self.use_cache:
            cached_tool = self.cache.get(combined_question, 'function_knowledge', 'selected_tool.txt')
            if cached_tool:
                logger.info(f"✓ 使用缓存的工具: {cached_tool}")
                detail_info["cached"] = True
                return cached_tool, detail_info
        
        try:
            all_tool_infos = get_all_tool_infos()
            if not all_tool_infos:
                logger.info("  工具库为空，无可用工具")
                return "None", detail_info
            
            tool_count = len(all_tool_infos.split('--- Tool:')) - 1
            detail_info["available_tools_count"] = tool_count
            logger.info(f"  当前可用工具数: {tool_count}")
                
            prompt_template = self._load_prompt("function_knowledge_select_tools_prompt.md")
            prompt = prompt_template.format(
                query=query,
                tool_infos=all_tool_infos
            )
            
            detail_info["prompt"] = prompt
            detail_info["tool_infos"] = all_tool_infos
            
            logger.info("→ 调用Gemini选择工具...")
            tool_name = generate_text(prompt=prompt)
            tool_name = tool_name.strip()
            
            detail_info["response"] = tool_name
            
            logger.info(f"✓ 选择结果: {tool_name}")
            
            # 写入缓存
            if self.use_cache:
                self.cache.set(combined_question, 'function_knowledge', 'selected_tool.txt', tool_name)
            
            return tool_name, detail_info
        except Exception as e:
            logger.error(f"✗ 选择工具失败: {e}")
            detail_info["error"] = str(e)
            return "None", detail_info

    def extract_tool_params(self, combined_question: str, tool_name: str, query: str) -> tuple:
        """
        根据工具信息和查询提取调用参数
        
        Args:
            combined_question: 组合问题（用于缓存）
            tool_name: 工具名称
            query: 查询内容
            
        Returns:
            tuple: (params, detail_info)
        """
        logger.info(f"[步骤3] 提取工具参数...")
        
        # 初始化detail_info
        detail_info = {"cached": False, "prompt": None, "response": None, "tool_info": None}
        
        # 尝试从缓存读取
        if self.use_cache:
            cached_params = self.cache.get(combined_question, 'function_knowledge', 'tool_params.json')
            if cached_params:
                logger.info(f"✓ 使用缓存的参数: {cached_params}")
                detail_info["cached"] = True
                return cached_params, detail_info
        
        try:
            # 获取工具信息
            tool_info = get_tool_info(tool_name)
            if not tool_info:
                logger.warning(f"  ⚠ 未找到工具 {tool_name} 的信息，使用默认参数")
                # 降级：使用query作为keyword
                default_params = {"keyword": query}
                detail_info["fallback"] = "tool_info_not_found"
                return default_params, detail_info
            
            detail_info["tool_info"] = tool_info
            logger.info(f"  工具 {tool_name} 信息长度: {len(tool_info)}")
            
            # 加载prompt
            prompt_template = self._load_prompt("function_knowledge_extract_tool_params_prompt.md")
            prompt = prompt_template.format(
                query=query,
                tool_info=tool_info
            )
            
            detail_info["prompt"] = prompt
            
            # 调用LLM提取参数
            logger.info("  → 调用Gemini提取参数...")
            response_text = generate_text(prompt=prompt)
            detail_info["response"] = response_text
            
            # 解析JSON
            logger.info("  → 解析参数JSON...")
            try:
                # 清理可能的markdown标记
                response_text = response_text.strip()
                if response_text.startswith("```json"):
                    response_text = response_text[7:]
                if response_text.startswith("```"):
                    response_text = response_text[3:]
                if response_text.endswith("```"):
                    response_text = response_text[:-3]
                response_text = response_text.strip()
                
                params = json.loads(response_text)
                
                logger.info(f"✓ 提取参数成功: {params}")
                
                # 写入缓存
                if self.use_cache:
                    self.cache.set(combined_question, 'function_knowledge', 'tool_params.json', params)
                
                return params, detail_info
                
            except json.JSONDecodeError as e:
                logger.error(f"  ✗ 解析JSON失败: {e}")
                logger.error(f"  响应内容: {response_text}")
                # 降级：使用query作为keyword
                default_params = {"keyword": query}
                logger.warning(f"  使用默认参数: {default_params}")
                detail_info["fallback"] = "json_decode_error"
                return default_params, detail_info
                
        except Exception as e:
            logger.error(f"✗ 提取工具参数失败: {e}")
            # 降级：使用query作为keyword
            default_params = {"keyword": query}
            detail_info["error"] = str(e)
            detail_info["fallback"] = "exception"
            return default_params, detail_info

    def save_knowledge_to_file(self, knowledge: str, combined_question: str):
        """保存获取到的知识到文件"""
        try:
            logger.info("[保存知识] 开始保存知识到文件...")

            # 获取问题hash
            import hashlib
            question_hash = hashlib.md5(combined_question.encode('utf-8')).hexdigest()[:12]

            # 获取缓存目录（和execution_record.json同级）
            if self.use_cache and self.cache:
                cache_dir = os.path.join(self.cache.base_cache_dir, question_hash)
            else:
                cache_dir = os.path.join(os.path.dirname(__file__), '.cache', question_hash)

            os.makedirs(cache_dir, exist_ok=True)

            # 保存到knowledge.txt
            knowledge_file = os.path.join(cache_dir, 'knowledge.txt')
            with open(knowledge_file, 'w', encoding='utf-8') as f:
                f.write(knowledge)

            logger.info(f"✓ 知识已保存到: {knowledge_file}")
            logger.info(f"  知识长度: {len(knowledge)} 字符")

        except Exception as e:
            logger.error(f"✗ 保存知识失败: {e}")

    def get_knowledge(self, question: str, post_info: str, persona_info: str) -> dict:
        """
        获取方法知识的主流程
        
        Returns:
            dict: 包含完整执行信息的字典
            {
                "input": {...},          # 原始输入
                "execution": {...},      # 执行过程信息
                "result": {...},         # 最终结果
                "metadata": {...}        # 元数据
            }
        """
        import time
        start_time = time.time()
        timestamp = time.strftime("%Y-%m-%d %H:%M:%S")
        
        logger.info("=" * 80)
        logger.info(f"Function Knowledge - 开始处理")
        logger.info(f"问题: {question}")
        logger.info(f"帖子信息: {post_info}")
        logger.info(f"人设信息: {persona_info}")
        logger.info("=" * 80)
        
        # 组合问题的唯一标识
        combined_question = f"{question}||{post_info}||{persona_info}"
        
        # 初始化执行记录
        execution_record = {
            "input": {
                "question": question,
                "post_info": post_info,
                "persona_info": persona_info,
                "timestamp": timestamp
            },
            "execution": {
                "steps": [],
                "tool_info": None,
                "knowledge_search_info": None
            },
            "result": {
                "type": None,  # "tool" 或 "knowledge"
                "content": None,
                "raw_data": None
            },
            "metadata": {
                "execution_time": None,
                "cache_hits": [],
                "errors": []
            }
        }
        
        # 检查最终结果缓存
        if self.use_cache:
            cached_final = self.cache.get(combined_question, 'function_knowledge', 'final_result.json')
            if cached_final:
                logger.info(f"✓ 使用缓存的最终结果")
                logger.info("=" * 80 + "\n")
                # 如果是完整的执行记录，直接返回
                if isinstance(cached_final, dict) and "execution" in cached_final:
                    return cached_final
                # 否则构造一个简单的返回
                return {
                    "input": execution_record["input"],
                    "execution": {"cached": True},
                    "result": {"type": "cached", "content": cached_final},
                    "metadata": {"cache_hit": True}
                }
        
        try:
            # 步骤1: 生成Query
            step1_start = time.time()
            query, query_detail = self.generate_query(question, post_info, persona_info)
            execution_record["execution"]["steps"].append({
                "step": 1,
                "name": "generate_query",
                "duration": time.time() - step1_start,
                "output": query,
                "detail": query_detail  # 包含prompt和response
            })
            
            # 步骤2: 选择工具
            step2_start = time.time()
            tool_name, tool_select_detail = self.select_tool(combined_question, query)
            execution_record["execution"]["steps"].append({
                "step": 2,
                "name": "select_tool",
                "duration": time.time() - step2_start,
                "output": tool_name,
                "detail": tool_select_detail  # 包含prompt、response和可用工具列表
            })
            
            result_content = None
            if tool_name and tool_name != "None":
                # 路径A: 使用工具
                execution_record["result"]["type"] = "tool"
                
                # 步骤3: 提取参数
                step3_start = time.time()
                arguments, params_detail = self.extract_tool_params(combined_question, tool_name, query)
                execution_record["execution"]["steps"].append({
                    "step": 3,
                    "name": "extract_tool_params",
                    "duration": time.time() - step3_start,
                    "output": arguments,
                    "detail": params_detail  # 包含prompt、response和工具信息
                })
                
                # 步骤4: 调用工具
                logger.info(f"[步骤4] 调用工具: {tool_name}")
                
                # 检查工具调用缓存
                if self.use_cache:
                    cached_tool_result = self.cache.get(combined_question, 'function_knowledge', 'tool_result.json')
                    if cached_tool_result:
                        logger.info(f"✓ 使用缓存的工具调用结果")
                        execution_record["metadata"]["cache_hits"].append("tool_result")
                        tool_result = cached_tool_result
                    else:
                        step4_start = time.time()
                        logger.info(f"  → 调用工具，参数: {arguments}")
                        tool_result = call_tool(tool_name, arguments)
                        
                        # 缓存工具调用结果
                        self.cache.set(combined_question, 'function_knowledge', 'tool_result.json', tool_result)
                        
                        execution_record["execution"]["steps"].append({
                            "step": 4,
                            "name": "call_tool",
                            "duration": time.time() - step4_start,
                            "output": "success"
                        })
                else:
                    step4_start = time.time()
                    logger.info(f"  → 调用工具，参数: {arguments}")
                    tool_result = call_tool(tool_name, arguments)
                    execution_record["execution"]["steps"].append({
                        "step": 4,
                        "name": "call_tool",
                        "duration": time.time() - step4_start,
                        "output": "success"
                    })
                
                # 记录工具调用信息
                execution_record["execution"]["tool_info"] = {
                    "tool_name": tool_name,
                    "parameters": arguments,
                    "result": tool_result
                }
                
                result_content = f"工具 {tool_name} 执行结果: {json.dumps(tool_result, ensure_ascii=False)}"
                execution_record["result"]["content"] = result_content
                execution_record["result"]["raw_data"] = tool_result
                
                logger.info(f"✓ 工具调用完成")
                
            else:
                # 路径B: 知识搜索
                execution_record["result"]["type"] = "knowledge_search"
                
                logger.info("[步骤4] 未找到合适工具，调用 MultiSearch...")
                
                step4_start = time.time()
                knowledge = get_multi_search_knowledge(query, cache_key=combined_question)
                
                execution_record["execution"]["steps"].append({
                    "step": 4,
                    "name": "multi_search_knowledge",
                    "duration": time.time() - step4_start,
                    "output": f"knowledge_length: {len(knowledge)}"
                })
                
                # 记录知识搜索信息
                execution_record["execution"]["knowledge_search_info"] = {
                    "query": query,
                    "knowledge_length": len(knowledge),
                    "source": "multi_search"
                }
                
                result_content = knowledge
                execution_record["result"]["content"] = knowledge
                execution_record["result"]["raw_data"] = {"knowledge": knowledge, "query": query}
                
                # 异步生成新工具
                logger.info("[后台任务] 启动新工具生成线程...")
                threading.Thread(target=self.save_knowledge_to_file, args=(knowledge, combined_question)).start()
            # 计算总执行时间
            execution_record["metadata"]["execution_time"] = time.time() - start_time
            
            # 保存完整的执行记录到JSON文件
            if self.use_cache:
                self.cache.set(combined_question, 'function_knowledge', 'final_result.json', execution_record)
                
                # 同时保存一个格式化的JSON文件供人类阅读
                from knowledge_v2.cache_manager import CacheManager
                cache = CacheManager()
                import hashlib
                question_hash = hashlib.md5(combined_question.encode('utf-8')).hexdigest()[:12]
                output_file = os.path.join(cache.base_cache_dir, question_hash, 'execution_record.json')
                
                try:
                    with open(output_file, 'w', encoding='utf-8') as f:
                        json.dump(execution_record, f, ensure_ascii=False, indent=2)
                    logger.info(f"✓ 完整执行记录已保存: {output_file}")
                except Exception as e:
                    logger.error(f"保存执行记录失败: {e}")
            
            logger.info("=" * 80)
            logger.info(f"✓ Function Knowledge 完成")
            logger.info(f"  类型: {execution_record['result']['type']}")
            logger.info(f"  结果长度: {len(result_content) if result_content else 0}")
            logger.info(f"  执行时间: {execution_record['metadata']['execution_time']:.2f}秒")
            logger.info("=" * 80 + "\n")
            
            return execution_record
            
        except Exception as e:
            logger.error(f"✗ 执行失败: {e}")
            import traceback
            error_trace = traceback.format_exc()
            
            execution_record["metadata"]["errors"].append({
                "error": str(e),
                "traceback": error_trace
            })
            execution_record["result"]["type"] = "error"
            execution_record["result"]["content"] = f"执行失败: {str(e)}"
            execution_record["metadata"]["execution_time"] = time.time() - start_time
            
            return execution_record

def get_knowledge(question: str, post_info: str, persona_info: str) -> dict:
    """
    便捷调用函数
    
    Returns:
        dict: 完整的执行记录，包含输入、执行过程、结果和元数据
    """
    agent = FunctionKnowledge()
    return agent.get_knowledge(question, post_info, persona_info)

if __name__ == "__main__":
    # 测试代码
    question = "教资查分这个信息怎么来的"
    post_info = "发帖时间：2025.11.07"
    persona_info = ""
    
    try:
        agent = FunctionKnowledge()
        execution_result = agent.get_knowledge(question, post_info, persona_info)
        print("=" * 50)
        print("执行结果:")
        print("=" * 50)
        print(f"类型: {execution_result['result']['type']}")
        print(f"内容预览: {execution_result['result']['content'][:200]}...")
        print(f"执行时间: {execution_result['metadata']['execution_time']:.2f}秒")
        print(f"\n完整JSON已保存到缓存目录")
    except Exception as e:
        logger.error(f"测试失败: {e}")