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import logging
import os
import time
from typing import List

import requests
from tavily import TavilyClient  # type: ignore[import]

from src.agent.state import SearchResult


logger = logging.getLogger(__name__)


def search_stackoverflow(query: str, limit: int = 3) -> List[SearchResult]:
    """Stack Overflow์—์„œ ๊ด€๋ จ ์งˆ๋ฌธ์„ ๊ฒ€์ƒ‰ํ•œ๋‹ค.
    
    Args:
        query: ๊ฒ€์ƒ‰ ์ฟผ๋ฆฌ
        limit: ๋ฐ˜ํ™˜ํ•  ์ตœ๋Œ€ ๊ฒฐ๊ณผ ์ˆ˜
        
    Returns:
        SearchResult ๋ฆฌ์ŠคํŠธ (์‹คํŒจ ์‹œ ๋นˆ ๋ฆฌ์ŠคํŠธ)
    """
    if not query.strip():
        logger.warning("Stack Overflow ๊ฒ€์ƒ‰: ๋นˆ ์ฟผ๋ฆฌ")
        return []
    
    try:
        url = "https://api.stackexchange.com/2.3/search/advanced"
        params = {
            "q": query,
            "order": "desc",
            "sort": "votes",
            "site": "stackoverflow",
            "pagesize": limit,
            "filter": "withbody",
        }
        
        response = requests.get(url, params=params, timeout=10)
        response.raise_for_status()
        
        data = response.json()
        items = data.get("items", [])
        
        results = []
        max_score = max((item.get("score", 0) for item in items), default=1)
        
        for item in items:
            title = item.get("title", "")
            body = item.get("body", "")[:500]  # ๋ณธ๋ฌธ ์ผ๋ถ€๋งŒ ํฌํ•จ
            content = f"{title}\n\n{body}"
            
            score = item.get("score", 0)
            # ์ •๊ทœํ™”: 0-1 ๋ฒ”์œ„๋กœ ๋ณ€ํ™˜
            relevance = min(score / max(max_score, 1), 1.0) if max_score > 0 else 0.5
            
            results.append(
                SearchResult(
                    source="Stack Overflow",
                    content=content,
                    url=item.get("link"),
                    relevance_score=relevance,
                )
            )
        
        logger.info("Stack Overflow ๊ฒ€์ƒ‰ ์„ฑ๊ณต: %d๊ฐœ ๊ฒฐ๊ณผ", len(results))
        
        # Rate limit ์ค€์ˆ˜
        time.sleep(1)
        
        return results
        
    except Exception as e:
        logger.error("Stack Overflow ๊ฒ€์ƒ‰ ์‹คํŒจ: %s", e, exc_info=True)
        return []


def search_github(query: str, limit: int = 3) -> List[SearchResult]:
    """GitHub์—์„œ ๊ด€๋ จ ์ฝ”๋“œ๋ฅผ ๊ฒ€์ƒ‰ํ•œ๋‹ค.
    
    Args:
        query: ๊ฒ€์ƒ‰ ์ฟผ๋ฆฌ
        limit: ๋ฐ˜ํ™˜ํ•  ์ตœ๋Œ€ ๊ฒฐ๊ณผ ์ˆ˜
        
    Returns:
        SearchResult ๋ฆฌ์ŠคํŠธ (์‹คํŒจ ์‹œ ๋นˆ ๋ฆฌ์ŠคํŠธ)
    """
    if not query.strip():
        logger.warning("GitHub ๊ฒ€์ƒ‰: ๋นˆ ์ฟผ๋ฆฌ")
        return []
    
    try:
        url = "https://api.github.com/search/code"
        
        # Python ์ฝ”๋“œ๋กœ ์ œํ•œ (์–ธ์–ด ๊ฐ์ง€ ๋กœ์ง์€ ์ถ”ํ›„ ํ™•์žฅ ๊ฐ€๋Šฅ)
        search_query = f"{query} language:python"
        
        params = {
            "q": search_query,
            "sort": "indexed",
            "per_page": limit,
        }
        
        headers = {
            "Accept": "application/vnd.github.v3+json",
        }
        
        # GitHub ํ† ํฐ์ด ์žˆ์œผ๋ฉด Authorization ํ—ค๋” ์ถ”๊ฐ€
        github_token = os.getenv("GITHUB_TOKEN")
        if github_token:
            headers["Authorization"] = f"token {github_token}"
            logger.debug("GitHub ํ† ํฐ ์‚ฌ์šฉ (์ธ์ฆ๋œ ์š”์ฒญ)")
        else:
            logger.warning(
                "GITHUB_TOKEN์ด ์„ค์ •๋˜์ง€ ์•Š์Œ - rate limit ์ œํ•œ์  (60 req/hr). "
                "ํ† ํฐ ์„ค์ • ์‹œ 5,000 req/hr๋กœ ์ฆ๊ฐ€"
            )
        
        response = requests.get(url, params=params, headers=headers, timeout=10)
        response.raise_for_status()
        
        data = response.json()
        items = data.get("items", [])
        
        results = []
        for item in items:
            repo_name = item.get("repository", {}).get("full_name", "unknown")
            path = item.get("path", "")
            content = f"Repository: {repo_name}\nFile: {path}"
            
            results.append(
                SearchResult(
                    source="GitHub",
                    content=content,
                    url=item.get("html_url"),
                    relevance_score=0.8,  # GitHub ๊ฒฐ๊ณผ๋Š” ์ผ๋ฐ˜์ ์œผ๋กœ ๋†’์€ ๊ด€๋ จ๋„
                )
            )
        
        logger.info("GitHub ๊ฒ€์ƒ‰ ์„ฑ๊ณต: %d๊ฐœ ๊ฒฐ๊ณผ", len(results))
        
        # Rate limit ์ค€์ˆ˜
        time.sleep(1)
        
        return results
        
    except requests.exceptions.HTTPError as e:
        if e.response.status_code == 403:
            logger.warning("GitHub API rate limit ์ดˆ๊ณผ")
        else:
            logger.error("GitHub ๊ฒ€์ƒ‰ HTTP ์—๋Ÿฌ: %s", e, exc_info=True)
        return []
    except Exception as e:
        logger.error("GitHub ๊ฒ€์ƒ‰ ์‹คํŒจ: %s", e, exc_info=True)
        return []


def search_official_docs(query: str, limit: int = 3) -> List[SearchResult]:
    """Tavily API๋ฅผ ์‚ฌ์šฉํ•ด ๊ณต์‹ ๋ฌธ์„œ๋ฅผ ๊ฒ€์ƒ‰ํ•œ๋‹ค.
    
    Args:
        query: ๊ฒ€์ƒ‰ ์ฟผ๋ฆฌ
        limit: ๋ฐ˜ํ™˜ํ•  ์ตœ๋Œ€ ๊ฒฐ๊ณผ ์ˆ˜
        
    Returns:
        SearchResult ๋ฆฌ์ŠคํŠธ (์‹คํŒจ ์‹œ ๋นˆ ๋ฆฌ์ŠคํŠธ)
    """
    if not query.strip():
        logger.warning("Official Docs ๊ฒ€์ƒ‰: ๋นˆ ์ฟผ๋ฆฌ")
        return []
    
    api_key = os.getenv("TAVILY_API_KEY")
    if not api_key:
        logger.error("TAVILY_API_KEY ํ™˜๊ฒฝ ๋ณ€์ˆ˜๊ฐ€ ์„ค์ •๋˜์–ด ์žˆ์ง€ ์•Š์Šต๋‹ˆ๋‹ค.")
        return []
    
    try:
        client = TavilyClient(api_key=api_key)
        
        response = client.search(
            query=query,
            search_depth="basic",
            max_results=limit,
            include_domains=[
                "docs.python.org",
                "docs.oracle.com",
                "spring.io/guides",
                "developer.mozilla.org",
                "reactjs.org/docs",
            ],
        )
        
        results = []
        for item in response.get("results", []):
            content = item.get("content", "")
            url = item.get("url", "")
            score = item.get("score", 0.5)  # Tavily๊ฐ€ ์ œ๊ณตํ•˜๋Š” ๊ด€๋ จ๋„ ์ ์ˆ˜
            
            results.append(
                SearchResult(
                    source="Official Docs",
                    content=content,
                    url=url,
                    relevance_score=score,
                )
            )
        
        logger.info("Tavily ๊ฒ€์ƒ‰ ์„ฑ๊ณต: %d๊ฐœ ๊ฒฐ๊ณผ", len(results))
        return results
        
    except Exception as e:
        logger.error("Tavily ๊ฒ€์ƒ‰ ์‹คํŒจ: %s", e, exc_info=True)
        return []