# -*- coding: utf-8 -*-
"""Query Routing RAG - classify query and boost retrieval by category keywords."""
from .base import BaseRAG
from loguru import logger


class QueryRoutingRAG(BaseRAG):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)

    def _classify_query(self, query):
        categories = [
            "budget", "deadline", "qualification", "evaluation",
            "payment", "warranty", "delivery", "contact", "scope"
        ]
        categories_str = ", ".join(categories)
        prompt = (
            "将以下问题分类到以下类别之一：{}\n\n"
            "问题：{}\n\n"
            "类别：".format(categories_str, query)
        )
        return self._call_llm(prompt).strip().lower()

    def retrieve(self, query, k=10):
        query_embedding = self.embedding_model.embed_query(query)
        semantic_results = self.vector_store.similarity_search(query_embedding, k)
        
        category = self._classify_query(query)
        logger.info("QueryRouting: category={}".format(category))
        
        category_boost = {}
        for doc, score in semantic_results:
            content_lower = doc.page_content.lower()
            category_keywords = {
                "budget": ["预算", "金额", "价格", "费用", "报价"],
                "deadline": ["截止", "时间", "日期", "开标"],
                "qualification": ["资格", "要求", "证书", "业绩"],
                "evaluation": ["评标", "评价", "分数", "方法"],
                "payment": ["付款", "结算", "进度", "保证金"],
                "warranty": ["质保", "维修", "售后", "服务"],
                "delivery": ["交货", "工期", "交付", "地点"],
                "contact": ["联系人", "电话", "邮箱"],
                "scope": ["范围", "内容", "清单", "设备"],
            }
            keywords = category_keywords.get(category, [])
            boost = sum(1 for kw in keywords if kw in content_lower) * 0.1
            category_boost[self._dedup_key(doc)] = boost
        
        enhanced_results = []
        for doc, score in semantic_results:
            boost = category_boost.get(self._dedup_key(doc), 0)
            enhanced_results.append((doc, score + boost))
        
        enhanced_results.sort(key=lambda x: x[1], reverse=True)
        return self._deduplicate_results(enhanced_results, k)

    def generate(self, query, context):
        prompt = (
            "根据以下经过查询路由的参考文档，回答问题。\n\n"
            "参考文档：\n{}\n\n"
            "问题：{}\n\n"
            "请详细回答。".format(context, query)
        )
        return self._call_llm(prompt)