#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
权重分查询工具

从 examples/piaoquan_demand/data/{execution_id} 目录读取权重分 JSON，
支持按元素/分类查询 TopN，以及按名称列表批量查询权重分。
"""
import json
from pathlib import Path

from agent import tool
from examples.piaoquan_demand.topic_build_agent_context import TopicBuildAgentContext
from examples.piaoquan_demand.topic_build_pattern_tools import _log_tool_input, _log_tool_output

_VALID_LEVELS = {"元素", "分类"}
_VALID_DIMENSIONS = {"实质", "形式", "意图"}


def _get_weight_file_path(level: str, dimension: str) -> Path:
    """根据参数构造权重数据文件路径。"""
    execution_id = TopicBuildAgentContext.get_execution_id()
    if execution_id is None:
        raise ValueError("未设置 execution_id，请先在 TopicBuildAgentContext 中设置")

    filename = f"{dimension}_{level}.json"
    base_dir = Path(__file__).parent / "data" / str(execution_id)
    return base_dir / filename


def _load_weight_data(level: str, dimension: str) -> list[dict]:
    """读取并返回权重数据列表。"""
    file_path = _get_weight_file_path(level=level, dimension=dimension)
    if not file_path.exists():
        raise FileNotFoundError(f"权重数据文件不存在: {file_path}")

    with file_path.open("r", encoding="utf-8") as f:
        data = json.load(f)

    if not isinstance(data, list):
        raise ValueError(f"权重数据格式错误，期望 list，实际为: {type(data).__name__}")
    return data


def _validate_params(level: str, dimension: str):
    """校验通用参数。"""
    if level not in _VALID_LEVELS:
        raise ValueError(f"level 参数非法: {level}，可选值: {sorted(_VALID_LEVELS)}")
    if dimension not in _VALID_DIMENSIONS:
        raise ValueError(f"dimension 参数非法: {dimension}，可选值: {sorted(_VALID_DIMENSIONS)}")


@tool("查询元素或分类权重分排名区间。参数：level(元素/分类)、dimension(实质/形式/意图)、start(起始排名，含，从1开始)、end(结束排名，含，从1开始)。")
def get_weight_score_topn(level: str, dimension: str, start: int = 1, end: int = 10) -> str:
    """查询元素或分类权重分排名区间。

    Args:
        level: 查询层级，元素 或 分类。
        dimension: 查询维度，实质 / 形式 / 意图。
        start: 起始排名（包含），从 1 开始。
        end: 结束排名（包含），从 1 开始。

    Returns:
        JSON 字符串，包含查询参数、总量和区间数据。
    """
    execution_id = TopicBuildAgentContext.get_execution_id()
    params = {
        "execution_id": execution_id,
        "level": level,
        "dimension": dimension,
        "start": start,
        "end": end,
    }
    _log_tool_input("get_weight_score_topn", params)

    try:
        _validate_params(level=level, dimension=dimension)
        if start < 1 or end < 1:
            return _log_tool_output(
                "get_weight_score_topn",
                f"错误: start/end 必须为大于等于 1 的整数，当前值: start={start}, end={end}",
            )
        if start > end:
            return _log_tool_output(
                "get_weight_score_topn",
                f"错误: start 不能大于 end，当前值: start={start}, end={end}",
            )

        data = _load_weight_data(level=level, dimension=dimension)
        sorted_data = sorted(data, key=lambda x: float(x.get("score", 0)), reverse=True)
        # 用户输入为 1-based 且 end 为包含边界，需转换为 Python 切片
        ranged_items = sorted_data[start - 1 : end]

        result = {
            "level": level,
            "dimension": dimension,
            "start": start,
            "end": end,
            "total_count": len(data),
            "matched_count": len(ranged_items),
            "items": ranged_items,
        }
        return _log_tool_output("get_weight_score_topn", json.dumps(result, ensure_ascii=False, indent=2))
    except Exception as e:
        return _log_tool_output("get_weight_score_topn", f"查询失败: {e}")


@tool("批量查询指定名称的权重分。参数：level(元素/分类)、dimension(实质/形式/意图)、names（名称列表）。")
def get_weight_score_by_name(level: str, dimension: str, names: list[str]) -> str:
    """批量查询指定名称的权重分。

    Args:
        level: 查询层级，元素 或 分类。
        dimension: 查询维度，实质 / 形式 / 意图。
        names: 要查询的名称列表（元素名或分类名），顺序与返回 results 一一对应。

    Returns:
        JSON 字符串，含每个名称的 matched_count 与 items。
    """
    execution_id = TopicBuildAgentContext.get_execution_id()
    params = {
        "execution_id": execution_id,
        "level": level,
        "dimension": dimension,
        "names": names,
    }
    _log_tool_input("get_weight_score_by_name", params)

    try:
        _validate_params(level=level, dimension=dimension)
        if not names:
            return _log_tool_output("get_weight_score_by_name", "错误: names 不能为空列表")
        if not isinstance(names, list):
            return _log_tool_output("get_weight_score_by_name", f"错误: names 必须为列表，当前类型: {type(names).__name__}")

        stripped: list[str] = []
        for i, n in enumerate(names):
            if n is None or (isinstance(n, str) and not n.strip()):
                return _log_tool_output(
                    "get_weight_score_by_name",
                    f"错误: names[{i}] 不能为空",
                )
            stripped.append(str(n).strip())

        data = _load_weight_data(level=level, dimension=dimension)

        if level == "元素":
            key = "name"
        else:
            key = "category"

        results = []
        for target_name in stripped:
            matched = [item for item in data if str(item.get(key, "")).strip() == target_name]
            results.append(
                {
                    "name": target_name,
                    "matched_count": len(matched),
                    "items": matched,
                }
            )

        result = {
            "level": level,
            "dimension": dimension,
            "query_count": len(stripped),
            "results": results,
        }
        return _log_tool_output("get_weight_score_by_name", json.dumps(result, ensure_ascii=False, indent=2))
    except Exception as e:
        return _log_tool_output("get_weight_score_by_name", f"查询失败: {e}")