"""
知识管理工具 - KnowHub API 封装

所有工具通过 HTTP API 调用 KnowHub Server。
"""

import os
import logging
import httpx
from typing import List, Dict, Optional, Any
from agent.tools import tool, ToolResult, ToolContext

logger = logging.getLogger(__name__)

# KnowHub Server API 地址
KNOWHUB_API = os.getenv("KNOWHUB_API", "http://localhost:8000")


@tool()
async def knowledge_search(
    query: str,
    top_k: int = 5,
    min_score: int = 3,
    tags_type: Optional[List[str]] = None,
    context: Optional[ToolContext] = None,
) -> ToolResult:
    """
    检索知识（两阶段：语义路由 + 质量精排）

    Args:
        query: 搜索查询（任务描述）
        top_k: 返回数量（默认 5）
        min_score: 最低评分过滤（默认 3）
        tags_type: 按类型过滤（tool/usecase/definition/plan/strategy）
        context: 工具上下文

    Returns:
        相关知识列表
    """
    try:
        params = {
            "q": query,
            "top_k": top_k,
            "min_score": min_score,
        }
        if tags_type:
            params["tags_type"] = ",".join(tags_type)

        async with httpx.AsyncClient(timeout=60.0) as client:
            response = await client.get(f"{KNOWHUB_API}/api/knowledge/search", params=params)
            response.raise_for_status()
            data = response.json()

        results = data.get("results", [])
        count = data.get("count", 0)

        if not results:
            return ToolResult(
                title="🔍 未找到相关知识",
                output=f"查询: {query}\n\n知识库中暂无相关的高质量知识。",
                long_term_memory=f"知识检索: 未找到相关知识 - {query[:50]}"
            )

        # 格式化输出
        output_lines = [f"查询: {query}\n", f"找到 {count} 条相关知识:\n"]

        for idx, item in enumerate(results, 1):
            output_lines.append(f"\n### {idx}. [{item['id']}] (⭐ {item.get('score', 3)})")
            output_lines.append(f"**场景**: {item['scenario'][:150]}...")
            output_lines.append(f"**内容**: {item['content'][:200]}...")

        return ToolResult(
            title="✅ 知识检索成功",
            output="\n".join(output_lines),
            long_term_memory=f"知识检索: 找到 {count} 条相关知识 - {query[:50]}",
            metadata={
                "count": count,
                "knowledge_ids": [item["id"] for item in results],
                "items": results
            }
        )

    except Exception as e:
        logger.error(f"知识检索失败: {e}")
        return ToolResult(
            title="❌ 检索失败",
            output=f"错误: {str(e)}",
            error=str(e)
        )


@tool()
async def knowledge_save(
    scenario: str,
    content: str,
    tags_type: List[str],
    urls: List[str] = None,
    agent_id: str = "research_agent",
    score: int = 3,
    message_id: str = "",
    context: Optional[ToolContext] = None,
) -> ToolResult:
    """
    保存新知识

    Args:
        scenario: 任务描述（在什么情景下 + 要完成什么目标）
        content: 核心内容
        tags_type: 知识类型标签，可选：tool, usecase, definition, plan, strategy
        urls: 参考来源链接列表
        agent_id: 执行此调研的 agent ID
        score: 初始评分 1-5（默认 3）
        message_id: 来源 Message ID
        context: 工具上下文

    Returns:
        保存结果
    """
    try:
        payload = {
            "scenario": scenario,
            "content": content,
            "tags_type": tags_type,
            "urls": urls or [],
            "agent_id": agent_id,
            "score": score,
            "message_id": message_id
        }

        async with httpx.AsyncClient(timeout=30.0) as client:
            response = await client.post(f"{KNOWHUB_API}/api/knowledge", json=payload)
            response.raise_for_status()
            data = response.json()

        knowledge_id = data.get("knowledge_id", "unknown")

        return ToolResult(
            title="✅ 知识已保存",
            output=f"知识 ID: {knowledge_id}\n\n场景:\n{scenario[:100]}...",
            long_term_memory=f"保存知识: {knowledge_id} - {scenario[:50]}",
            metadata={"knowledge_id": knowledge_id}
        )

    except Exception as e:
        logger.error(f"保存知识失败: {e}")
        return ToolResult(
            title="❌ 保存失败",
            output=f"错误: {str(e)}",
            error=str(e)
        )


@tool()
async def knowledge_update(
    knowledge_id: str,
    add_helpful_case: Optional[Dict] = None,
    add_harmful_case: Optional[Dict] = None,
    update_score: Optional[int] = None,
    evolve_feedback: Optional[str] = None,
    context: Optional[ToolContext] = None,
) -> ToolResult:
    """
    更新已有知识的评估反馈

    Args:
        knowledge_id: 知识 ID
        add_helpful_case: 添加好用的案例
        add_harmful_case: 添加不好用的案例
        update_score: 更新评分（1-5）
        evolve_feedback: 经验进化反馈（触发 LLM 重写）
        context: 工具上下文

    Returns:
        更新结果
    """
    try:
        payload = {}
        if add_helpful_case:
            payload["add_helpful_case"] = add_helpful_case
        if add_harmful_case:
            payload["add_harmful_case"] = add_harmful_case
        if update_score is not None:
            payload["update_score"] = update_score
        if evolve_feedback:
            payload["evolve_feedback"] = evolve_feedback

        if not payload:
            return ToolResult(
                title="⚠️ 无更新",
                output="未指定任何更新内容",
                long_term_memory="尝试更新知识但未指定更新内容"
            )

        async with httpx.AsyncClient(timeout=60.0) as client:
            response = await client.put(f"{KNOWHUB_API}/api/knowledge/{knowledge_id}", json=payload)
            response.raise_for_status()

        summary = []
        if add_helpful_case:
            summary.append("添加 helpful 案例")
        if add_harmful_case:
            summary.append("添加 harmful 案例")
        if update_score is not None:
            summary.append(f"更新评分: {update_score}")
        if evolve_feedback:
            summary.append("知识进化: 基于反馈重写内容")

        return ToolResult(
            title="✅ 知识已更新",
            output=f"知识 ID: {knowledge_id}\n\n更新内容:\n" + "\n".join(f"- {s}" for s in summary),
            long_term_memory=f"更新知识: {knowledge_id}"
        )

    except Exception as e:
        logger.error(f"更新知识失败: {e}")
        return ToolResult(
            title="❌ 更新失败",
            output=f"错误: {str(e)}",
            error=str(e)
        )


@tool()
async def knowledge_batch_update(
    feedback_list: List[Dict[str, Any]],
    context: Optional[ToolContext] = None,
) -> ToolResult:
    """
    批量反馈知识的有效性

    Args:
        feedback_list: 评价列表，每个元素包含:
            - knowledge_id: (str) 知识 ID
            - is_effective: (bool) 是否有效
            - feedback: (str, optional) 改进建议，若有效且有建议则触发知识进化
        context: 工具上下文

    Returns:
        批量更新结果
    """
    try:
        if not feedback_list:
            return ToolResult(
                title="⚠️ 反馈列表为空",
                output="未提供任何反馈",
                long_term_memory="批量更新知识: 反馈列表为空"
            )

        payload = {"feedback_list": feedback_list}

        async with httpx.AsyncClient(timeout=120.0) as client:
            response = await client.post(f"{KNOWHUB_API}/api/knowledge/batch_update", json=payload)
            response.raise_for_status()
            data = response.json()

        updated = data.get("updated", 0)

        return ToolResult(
            title="✅ 批量更新完成",
            output=f"成功更新 {updated} 条知识",
            long_term_memory=f"批量更新知识: 成功 {updated} 条"
        )

    except Exception as e:
        logger.error(f"批量更新知识失败: {e}")
        return ToolResult(
            title="❌ 批量更新失败",
            output=f"错误: {str(e)}",
            error=str(e)
        )


@tool()
async def knowledge_list(
    limit: int = 10,
    tags_type: Optional[List[str]] = None,
    context: Optional[ToolContext] = None,
) -> ToolResult:
    """
    列出已保存的知识

    Args:
        limit: 返回数量限制（默认 10）
        tags_type: 按类型过滤（可选）
        context: 工具上下文

    Returns:
        知识列表
    """
    try:
        params = {"limit": limit}
        if tags_type:
            params["tags_type"] = ",".join(tags_type)

        async with httpx.AsyncClient(timeout=30.0) as client:
            response = await client.get(f"{KNOWHUB_API}/api/knowledge", params=params)
            response.raise_for_status()
            data = response.json()

        results = data.get("results", [])
        count = data.get("count", 0)

        if not results:
            return ToolResult(
                title="📂 知识库为空",
                output="还没有保存任何知识",
                long_term_memory="知识库为空"
            )

        output_lines = [f"共找到 {count} 条知识:\n"]
        for item in results:
            score = item.get("eval", {}).get("score", 3)
            output_lines.append(f"- [{item['id']}] (⭐{score}) {item['scenario'][:60]}...")

        return ToolResult(
            title="📚 知识列表",
            output="\n".join(output_lines),
            long_term_memory=f"列出 {count} 条知识"
        )

    except Exception as e:
        logger.error(f"列出知识失败: {e}")
        return ToolResult(
            title="❌ 列表失败",
            output=f"错误: {str(e)}",
            error=str(e)
        )


@tool()
async def knowledge_slim(
    model: str = "anthropic/claude-sonnet-4.5",
    context: Optional[ToolContext] = None,
) -> ToolResult:
    """
    知识库瘦身：调用顶级大模型，将知识库中语义相似的知识合并精简

    Args:
        model: 使用的模型（默认 claude-sonnet-4.5）
        context: 工具上下文

    Returns:
        瘦身结果报告
    """
    try:
        async with httpx.AsyncClient(timeout=300.0) as client:
            response = await client.post(f"{KNOWHUB_API}/api/knowledge/slim", params={"model": model})
            response.raise_for_status()
            data = response.json()

        before = data.get("before", 0)
        after = data.get("after", 0)
        report = data.get("report", "")

        result = f"瘦身完成：{before} → {after} 条知识"
        if report:
            result += f"\n{report}"

        return ToolResult(
            title="✅ 知识库瘦身完成",
            output=result,
            long_term_memory=f"知识库瘦身: {before} → {after} 条"
        )

    except Exception as e:
        logger.error(f"知识库瘦身失败: {e}")
        return ToolResult(
            title="❌ 瘦身失败",
            output=f"错误: {str(e)}",
            error=str(e)
        )


# 兼容接口：get_experience
@tool(description="检索历史经验（strategy 标签的知识）")
async def get_experience(
    query: str,
    k: int = 3,
    context: Optional[ToolContext] = None,
) -> ToolResult:
    """
    检索历史经验（兼容接口，实际调用 knowledge_search 并过滤 strategy 标签）

    Args:
        query: 搜索查询（任务描述）
        k: 返回数量（默认 3）
        context: 工具上下文

    Returns:
        相关经验列表
    """
    return await knowledge_search(
        query=query,
        top_k=k,
        min_score=1,  # 经验的评分门槛较低
        tags_type=["strategy"],
        context=context
    )