import re
import html
import requests
import json
from typing import List, Dict, Any, Optional, Callable
from pathlib import Path


def html_to_text(html_content: str) -> str:
    """HTML转文本"""
    if not html_content:
        return ""
    clean = re.compile(r"<[^>]+>")
    text = clean.sub("", html_content)
    text = html.unescape(text)
    return re.sub(r"\s+", " ", text).strip()


def get_unique_match_count(search_text: str, filter_words: List[str]) -> int:
    """获取唯一匹配计数"""
    sorted_keywords = sorted(filter_words, key=len, reverse=True)
    match_count = 0
    remaining_text = search_text.lower()

    for keyword in sorted_keywords:
        kw_lower = keyword.lower()
        if kw_lower in remaining_text:
            match_count += 1
            remaining_text = remaining_text.replace(kw_lower, "", 1)

    return match_count


def calculate_relevance_score(
    doc_name: str, doc_keywords: str, search_keywords: List[str]
) -> float:
    """
    计算文档与搜索关键词的相关性得分

    Args:
        doc_name: 文档标题
        doc_keywords: 文档关键词
        search_keywords: 搜索关键词列表

    Returns:
        相关性得分（0-100）
    """
    # 合并搜索文本
    search_text = f"{doc_name} {doc_keywords}".lower()
    search_keywords_lower = [kw.lower() for kw in search_keywords]

    # 权重设置
    TITLE_WEIGHT = 0.7  # 标题权重（提高）
    KEYWORD_WEIGHT = 0.3  # 关键词权重
    EXACT_MATCH_BONUS = 0.5  # 精确匹配奖励（提高）
    PARTIAL_MATCH_FACTOR = 0.3  # 部分匹配因子

    total_score = 0.0

    # 1. 标题匹配得分（重新设计）
    title_score = 0.0
    doc_name_lower = doc_name.lower()

    for keyword in search_keywords_lower:
        if keyword in doc_name_lower:
            # 基础得分：基于关键词长度和位置
            base_score = min(len(keyword) * 2, 10)  # 每个字符2分，最多10分

            # 位置权重：标题开头和结尾的匹配更重要
            if doc_name_lower.startswith(keyword):
                base_score *= 1.5
            elif doc_name_lower.endswith(keyword):
                base_score *= 1.3

            # 精确匹配奖励：完全包含关键词
            if f" {keyword} " in f" {doc_name_lower} ":
                base_score *= 1 + EXACT_MATCH_BONUS

            title_score += base_score

    # 2. 关键词匹配得分
    keyword_score = 0.0
    for keyword in search_keywords_lower:
        if keyword in doc_keywords.lower():
            keyword_score += min(len(keyword) * 1.5, 8)  # 每个字符1.5分，最多8分

    # 3. 计算总得分
    total_score = (title_score * TITLE_WEIGHT) + (keyword_score * KEYWORD_WEIGHT)

    # 4. 匹配数量奖励（重要改进）
    matched_count = sum(1 for kw in search_keywords_lower if kw in search_text)
    if matched_count > 0:
        coverage_ratio = matched_count / len(search_keywords_lower)
        # 匹配越多，奖励越大
        total_score *= 1 + coverage_ratio * 0.5

    # 5. 特殊关键词优先级（针对你的具体需求）
    priority_keywords = ["交期", "审核", "修改", "终止", "失败", "错误", "明细", "功能"]
    for keyword in priority_keywords:
        if keyword in search_keywords_lower and keyword in search_text:
            total_score *= 1.2  # 提高优先级关键词奖励

    # 6. 长标题惩罚调整（避免长标题得分过低）
    if len(doc_name) > 30:
        # 长标题轻微惩罚，但不要过度惩罚
        total_score *= 0.9

    # 7. 确保至少匹配一个关键词就有基础分
    if matched_count == 0:
        return 0.0

    return min(total_score, 100.0)


def find_most_relevant_document(
    doc_list: List[dict], search_keywords: List[str], max_matches: int = 10
) -> List[dict]:
    """
    找到最相关的文档

    Args:
        doc_list: 文档列表
        search_keywords: 搜索关键词
        max_matches: 最大返回数量（增加到10）

    Returns:
        按相关性排序的文档列表
    """
    scored_docs = []

    for doc in doc_list:
        doc_id = doc["DocID"]
        doc_name = doc["DocName"]
        doc_keywords = doc.get("keyword", "")

        # 计算相关性得分
        score = calculate_relevance_score(doc_name, doc_keywords, search_keywords)

        # 降低过滤门槛，只要匹配至少一个关键词就考虑
        match_count = sum(
            1
            for kw in search_keywords
            if kw.lower() in f"{doc_name} {doc_keywords}".lower()
        )
        if match_count > 0:
            scored_docs.append(
                {
                    "doc_id": doc_id,
                    "doc_name": doc_name,
                    "keywords": doc_keywords,
                    "relevance_score": score,
                    "match_count": match_count,
                }
            )

    # 按相关性得分降序排序
    scored_docs.sort(key=lambda x: x["relevance_score"], reverse=True)

    return scored_docs[:max_matches]


def call_csharp_api(
    backend_url: str, token: str, uoName: str, functionName: str, SParms: dict
) -> str:
    """调用C# API的通用方法"""
    print(f"🔧 API调用调试信息:")
    print(f"  - 后端地址: {backend_url}")
    print(f"  - Token: {'已配置' if token else '未配置'}")
    print(f"  - 功能: {functionName}")
    print(f"  - 参数: {SParms}")

    if not backend_url or not token:
        error_msg = f"错误：未配置后端地址或认证令牌。后端: {backend_url or '未配置'}, Token: {'已配置' if token else '未配置'}"
        print(f"❌ {error_msg}")
        return error_msg

    headers = {
        "Accept": "application/json, text/plain, */*",
        "Content-Type": "application/json",
        "X-TOKEN": token,
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
    }

    payload = {
        "token": token,
        "CList": [
            {
                "uoName": uoName,
                "functionName": functionName,
                "SParms": SParms,
                "ifcommit": True,
                "returnStrList": [],
            }
        ],
        "language": "zh-cn",
    }

    try:
        print(f"🌐 发送API请求到: {backend_url}")
        response = requests.post(backend_url, headers=headers, json=payload, timeout=30)
        print(f"📡 响应状态码: {response.status_code}")

        if response.status_code == 200:
            data = response.json()
            return process_api_response(data)
        else:
            error_msg = f"API请求失败，状态码: {response.status_code}"
            print(f"❌ {error_msg}")
            return error_msg
    except Exception as e:
        error_msg = f"API调用异常: {str(e)}"
        print(f"❌ {error_msg}")
        return error_msg


def process_api_response(data: Dict[str, Any]) -> str:
    """处理API响应"""
    try:
        inner_json_str = data.get("reJob", {}).get("0", "{}")
        inner_data = json.loads(inner_json_str)

        if "err_msg" in inner_data:
            return f"API返回错误: {inner_data['err_msg']}"

        warning_msg = None
        if "warning_msg" in inner_data:
            warning_msg = inner_data["warning_msg"]

        if "data" in inner_data:
            data_list = inner_data["data"]
            if not data_list:
                return "没有数据"

            if isinstance(data_list[0], dict):
                headers = list(data_list[0].keys())
                result = [",".join(headers)]

                for row in data_list:
                    result.append(",".join([str(row.get(h, "")) for h in headers]))

                if warning_msg:
                    result.append(f"# 警告: {warning_msg}")

                print(result)
                return "\n".join(result)

        return json.dumps(data, ensure_ascii=False)
    except Exception as e:
        return f"响应处理错误: {str(e)}"


# 工具配置管理函数
def load_tool_config(
    config_path: Path, get_default_config: Optional[Callable] = None
) -> Dict[str, Any]:
    """
    加载工具配置的通用函数

    Args:
        config_path: 配置文件路径
        get_default_config: 获取默认配置的回调函数，如果不提供则返回空字典
    """
    if not config_path.exists():
        print(f"警告: 配置文件不存在: {config_path}")
        if get_default_config:
            return get_default_config()
        return {}

    try:
        with open(config_path, "r", encoding="utf-8") as f:
            return json.load(f)
    except json.JSONDecodeError as e:
        print(f"错误: 配置文件格式不正确: {e}")
        if get_default_config:
            return get_default_config()
        return {}
    except Exception as e:
        print(f"错误: 读取配置文件失败: {e}")
        if get_default_config:
            return get_default_config()
        return {}


def assemble_tool_description(tool_config: Dict[str, Any]) -> str:
    """组装工具描述，将所有键值组合成一个完整的字符串"""
    if not tool_config:
        return ""

    description_parts = []

    # 基础描述
    if "基础描述" in tool_config:
        description_parts.append(tool_config["基础描述"])

    # 功能说明
    if "功能说明" in tool_config:
        description_parts.append(f"\n功能: {tool_config['功能说明']}")

    # 入参说明
    if "入参说明" in tool_config:
        if isinstance(tool_config["入参说明"], dict):
            description_parts.append("\n参数:")
            for param, desc in tool_config["入参说明"].items():
                description_parts.append(f"  {param}: {desc}")
        else:
            description_parts.append(f"\n参数说明: {tool_config['入参说明']}")

    # 返回值说明
    if "返回值说明" in tool_config:
        if isinstance(tool_config["返回值说明"], dict):
            description_parts.append("\n返回:")
            for key, value in tool_config["返回值说明"].items():
                if isinstance(value, list):
                    description_parts.append(f"  {key}:")
                    for item in value:
                        description_parts.append(f"    - {item}")
                else:
                    description_parts.append(f"  {key}: {value}")
        else:
            description_parts.append(f"\n返回结果: {tool_config['返回值说明']}")

    # 输出格式要求
    if "输出格式要求" in tool_config:
        if isinstance(tool_config["输出格式要求"], list):
            description_parts.append("\n输出要求:")
            for requirement in tool_config["输出格式要求"]:
                description_parts.append(f"  - {requirement}")
        else:
            description_parts.append(f"\n注意: {tool_config['输出格式要求']}")

    # 使用示例
    if "使用示例" in tool_config:
        description_parts.append(f"\n示例: {tool_config['使用示例']}")

    return "\n".join(description_parts)


def get_tool_prompt(
    tool_name: str, default_config_func: Optional[Callable] = None
) -> str:
    """
    获取工具的完整提示词

    Args:
        tool_name: 工具名称
        default_config_func: 获取默认配置的函数
    """
    # 计算配置文件路径
    current_file = Path(__file__)
    config_path = current_file.parent.parent / "config" / "tool_config.json"

    # 加载配置
    config = load_tool_config(config_path, default_config_func)

    # 获取工具配置
    tool_config = config.get(tool_name, {})

    # 如果配置为空且提供了默认配置函数，使用默认配置
    if not tool_config and default_config_func:
        default_config = default_config_func()
        if isinstance(default_config, dict) and tool_name in default_config:
            tool_config = default_config[tool_name]
        elif isinstance(default_config, dict) and not default_config:
            # 如果返回的是整个配置字典
            tool_config = default_config
        else:
            tool_config = {}

    # 组装描述
    if tool_config:
        return assemble_tool_description(tool_config)
    else:
        return f"执行 {tool_name} 功能"