#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
File: ModelTool.py
Date: 2025-05-15
Author: oyyz
Description: 模型工具类
"""

from openai import OpenAI
from openai import AsyncOpenAI
import httpx
import asyncio
import time
import logging  # 导入 logging 模块
from langchain.embeddings.base import Embeddings
from typing import List, Any
import requests
import os
import logging
from rag2_0.tool.APIKeyManager import APIKeyManager
from urllib.parse import urljoin

class XinferenceEmbeddings(Embeddings):
    """SiliconFlow嵌入模型封装"""
    def __init__(self, api_key: str, model: str = os.getenv("EMBEDDING_MODEL_NAME", "bge-m3")):
        self.api_key = api_key
        self.model = model
        base_url = os.getenv("XINFERENCE_URL", "http://10.1.16.39:9995")
        self.url = urljoin(base_url.rstrip('/') + '/', 'v1/embeddings')
        self.headers = {
            "Authorization": f"Bearer {self.api_key}",
            "Content-Type": "application/json"
        }

    def _embed(self, input: List[str]) -> List[List[float]]:
        payload = {
            "model": self.model,
            "input": input,
            "encoding_format": "float"
        }
        response = requests.post(self.url, json=payload, headers=self.headers, timeout=300)
        response.raise_for_status()
        data = response.json()
        return [item["embedding"] for item in data["data"]]

    async def _embed_async(self, input: List[str]) -> List[List[float]]:
        """异步嵌入方法"""
        payload = {
            "model": self.model,
            "input": input,
            "encoding_format": "float"
        }
        async with httpx.AsyncClient(timeout=300) as client:
            response = await client.post(self.url, json=payload, headers=self.headers)
            response.raise_for_status()
            data = response.json()
            return [item["embedding"] for item in data["data"]]

    def embed_documents(self, texts: List[str]) -> List[List[float]]:
        return self._embed(texts)

    async def embed_documents_async(self, texts: List[str]) -> List[List[float]]:
        """异步嵌入多个文档"""
        return await self._embed_async(texts)

    def embed_query(self, text: str) -> List[float]:
        return self._embed([text])[0]

    async def embed_query_async(self, text: str) -> List[float]:
        """异步嵌入单个查询"""
        result = await self._embed_async([text])
        return result[0]
       
class XinferenceReRankerModel:
    """重排模型封装"""

    @staticmethod
    def rerank(query: str, documents: List[str], top_k: int = 10) -> List[str]:
        """
        使用重排序模型对文档进行重新排序
        
        Args:
            query: 用户查询文本
            documents: 需要重新排序的文档列表
            top_k: 返回排序后的前k个文档
            
        Returns:
            List[dict]: 重排序后的文档列表，每个元素包含document内容、相关性分数和原始索引
        """
        
        base_url = os.getenv("XINFERENCE_URL", "http://10.1.16.39:9995")
        model_name = os.getenv("RERANKER_MODEL_NAME", "bge-reranker-v2-m3")
        rerank_url = urljoin(base_url.rstrip('/') + '/', 'v1/rerank')
        params = {"documents": documents, "query": query, "top_n": top_k, "return_documents": True, "model": model_name}
        headers = {
            "Authorization": "Bearer <token>",  # 这里需要替换为实际的token
            "Content-Type": "application/json"
        }
        
        try:
            response = requests.post(rerank_url, json=params, headers=headers, timeout=300)
            response.raise_for_status()  # 检查响应状态
            results = response.json()
            
            # 返回重排序后的文档列表
            return [{"document": item["document"]["text"], "score": item["relevance_score"], "index": item["index"]} for item in results["results"]]
            
        except requests.exceptions.RequestException as e:
            logging.error(f"XinferenceReRankerModel重排序请求失败: {str(e)}")
            return []

    @staticmethod
    async def rerank_async(query: str, documents: List[str], top_k: int = 10) -> List[str]:
        """
        使用重排序模型对文档进行异步重新排序
        
        Args:
            query: 用户查询文本
            documents: 需要重新排序的文档列表
            top_k: 返回排序后的前k个文档
            
        Returns:
            List[dict]: 重排序后的文档列表，每个元素包含document内容、相关性分数和原始索引
        """
        base_url = os.getenv("XINFERENCE_URL", "http://10.1.16.39:9995")
        rerank_url = urljoin(base_url.rstrip('/') + '/', 'v1/rerank')
        model_name = os.getenv("RERANKER_MODEL_NAME", "bge-reranker-v2-m3")
        params = {"documents": documents, "query": query, "top_n": top_k, "return_documents": True, "model": model_name}
        headers = {
            "Authorization": "Bearer <token>",  # 这里需要替换为实际的token
            "Content-Type": "application/json"
        }
        
        try:
            async with httpx.AsyncClient(timeout=300) as client:
                response = await client.post(rerank_url, json=params, headers=headers)
                response.raise_for_status()  # 检查响应状态
                results = response.json()
                
                # 返回重排序后的文档列表
                return [{"document": item["document"]["text"], "score": item["relevance_score"], "index": item["index"]} for item in results["results"]]
                
        except httpx.RequestError as e:
            logging.error(f"XinferenceReRankerModel异步重排序请求失败: {str(e)}")
            return []


class OpenAiLLM:

    def __init__(self, **kwargs):
        if "api_key" in kwargs:
            self._api_key = kwargs.get("api_key")
            kwargs.pop("api_key")

        if "base_url" in kwargs:
            self._url = kwargs.get("base_url")
            kwargs.pop("base_url")
        else:
            self._url = os.getenv("OPENAI_API_BASE")

        if "model" in kwargs:
            self._model = kwargs.get("model")
            kwargs.pop("model")
        else:
            self._model = os.getenv("MODEL_NAME")

        self._kwargs = kwargs

    def invoke(self, user_prompt="你是谁？", need_retry=True, api_key:str = None, **extra_kwargs):
        # 初始化 OpenAI 客户端

        max_retries = 3
        retry_count = 0
        # 合并额外的kwargs与self._kwargs
        kwargs = {**self._kwargs}
        if extra_kwargs:
            kwargs.update(extra_kwargs)
        if "timeout" not in self._kwargs:
            timeout = httpx.Timeout(300.0) 
            self._kwargs["timeout"] = timeout

        if api_key is None:
            api_key = APIKeyManager.get_api_key()  
            
        if need_retry:
            while retry_count < max_retries:
                try:
                    
                    # 使用with语句创建客户端，确保资源会被正确释放
                    with OpenAI(api_key=api_key, base_url=self._url) as client:
                        # 创建 Completion 请求. 超时120s
                        completion = client.chat.completions.create(
                            model=self._model,
                            messages=[{'role': 'user', 'content': user_prompt}],
                            **self._kwargs
                        )
                        return completion.choices[0].message
                    
                except Exception as e:
                    retry_count += 1
                    if retry_count == max_retries:
                        raise RuntimeError(f"OpenAiLLM:invoke:error:{str(e)}.api_key:{api_key}") from e
                    else:
                        time.sleep(5*retry_count)  # 重试前等待5秒*重试次数
        else:
            try:
                # 创建 Completion 请求. 超时120s
                # 使用with语句创建客户端，确保资源会被正确释放
                with OpenAI(api_key=api_key, base_url=self._url) as client:
                    completion = client.chat.completions.create(
                        model=self._model,
                        messages=[{'role': 'user', 'content': user_prompt}],
                        **self._kwargs
                    )
                    return completion.choices[0].message
            except Exception as e:
                raise RuntimeError(f"OpenAiLLM:invoke:error:{str(e)}.api_key:{api_key}") from e

    async def invoke_async(self, user_prompt="你是谁？", need_retry=True, **extra_kwargs):
        """异步调用OpenAI API"""
        max_retries = 3
        retry_count = 0
        
        # 合并额外的kwargs与self._kwargs
        kwargs = {**self._kwargs}
        if extra_kwargs:
            kwargs.update(extra_kwargs)
            
        if "timeout" not in kwargs:
            timeout = httpx.Timeout(300.0) 
            kwargs["timeout"] = timeout

        if need_retry:
            while retry_count < max_retries:
                try:
                    api_key = APIKeyManager.get_api_key()  
                    # 使用异步客户端
                    async with AsyncOpenAI(api_key=api_key, base_url=self._url) as client:
                        # 创建异步Completion请求
                        completion = await client.chat.completions.create(
                            model=self._model,
                            messages=[{'role': 'user', 'content': user_prompt}],
                            **kwargs
                        )
                        return completion.choices[0].message
                    
                except Exception as e:
                    retry_count += 1
                    if retry_count == max_retries:
                        raise RuntimeError(f"OpenAiLLM:invoke_async:error:{str(e)}.api_key:{api_key}") from e
                    else:
                        await asyncio.sleep(5*retry_count)  # 异步等待
        else:
            try:
                api_key = APIKeyManager.get_api_key()  
                async with AsyncOpenAI(api_key=api_key, base_url=self._url) as client:
                    completion = await client.chat.completions.create(
                        model=self._model,
                        messages=[{'role': 'user', 'content': user_prompt}],
                        **kwargs
                    )
                    return completion.choices[0].message
            except Exception as e:
                raise RuntimeError(f"OpenAiLLM:invoke_async:error:{str(e)}.api_key:{api_key}") from e

if __name__ == "__main__":
    # 测试重排模型
    reranker = SiliconFlowReRankerModel()
    
    # 测试用例1：简单问题
    query = "如何通过【电力经济评价软件】的【打开】功能加载工程文件?"
    documents = []
    results = reranker.rerank(query, documents)
    print(f"测试用例1 - 查询:{query}")
    for idx, item in enumerate(results):
        print(f"{idx+1}. 文档: {item['document']}, 分数: {item['score']}")
    print("-" * 50)
    
    # 异步测试示例
    async def test_async():
        # 测试异步嵌入
        api_key = APIKeyManager.get_api_key()
        embeddings = XinferenceEmbeddings(api_key=api_key)
        query_embedding = await embeddings.embed_query_async("测试查询")
        print(f"异步嵌入向量维度: {len(query_embedding)}")
        
        # 测试异步重排序
        results = await SiliconFlowReRankerModel.rerank_async(query, documents)
        print(f"异步重排序结果数量: {len(results)}")
        
        # 测试异步LLM调用
        llm = OpenAiLLM()
        response = await llm.invoke_async("你好，请简单介绍一下自己")
        print(f"异步LLM响应: {response.content}")
    
    # 如果需要运行异步测试，取消下面的注释
    # import asyncio
    # asyncio.run(test_async())