# run.py
# ============================================================
# 类型：调度器（乙负责）
# 功能：按"先搜再分析"流程串联 Workflow（甲）和 Agent（乙）
# 用法：python run.py <arxiv_url>
# 示例：python run.py https://arxiv.org/abs/2011.08785
# ============================================================
import sys
import time
import re
import os
import json
import urllib.request
import urllib.error
import xml.etree.ElementTree as ET
from concurrent.futures import ThreadPoolExecutor, as_completed

# 自动加载 .env 文件
_ENV_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), ".env")
if os.path.isfile(_ENV_PATH):
    with open(_ENV_PATH, "r", encoding="utf-8") as _f:
        for _line in _f:
            _line = _line.strip()
            if _line and not _line.startswith("#") and "=" in _line:
                _key, _val = _line.split("=", 1)
                if _key not in os.environ:
                    os.environ[_key] = _val.strip().strip('"').strip("'")

# ---- 导入甲的 Workflow 模块 ----
try:
    from paper_fetcher import fetch_paper_info
except ImportError as e:
    raise ImportError(
        f"缺少模块: paper_fetcher.py（甲负责），请等待甲交付。\n"
        f"  原始错误: {e}"
    ) from e

try:
    from repo_searcher import search_repos
except ImportError as e:
    raise ImportError(
        f"缺少模块: repo_searcher.py（甲负责），请等待甲交付。\n"
        f"  原始错误: {e}"
    ) from e

try:
    from repo_fetcher import fetch_readme, fetch_dependencies
except ImportError as e:
    raise ImportError(
        f"缺少模块: repo_fetcher.py（甲负责），请等待甲交付。\n"
        f"  原始错误: {e}"
    ) from e

from direction_analyzer import analyze_direction
from repo_evaluator import evaluate_repo
from supervisor import supervise
from llm_utils import call_llm_json, parse_json_safe


def _enrich_domain_context(title: str, abstract: str, categories: list[str]) -> str:
    """从 Semantic Scholar 搜索同领域相关论文，扩充领域上下文。

    S2 覆盖全工科（含 IEEE/ASME/ASCE 等期刊），不限于 arXiv。
    搜索策略：1) 论文标题关键词 + survey/review  2) 摘要关键词
    失败时返回空字符串（静默降级）。
    """
    all_abstracts = []

    # 从标题提取 2-3 个核心关键词作为搜索词
    title_keywords = _extract_title_keywords(title)
    search_queries = [
        f"{' '.join(title_keywords)} survey review",
        f"{' '.join(title_keywords)} state of the art",
    ]

    for query in search_queries[:2]:
        api_url = (
            f"https://api.semanticscholar.org/graph/v1/paper/search"
            f"?query={urllib.request.quote(query)}&limit=3"
            f"&fields=title,abstract,year,citationCount"
        )
        req = urllib.request.Request(api_url, headers={"User-Agent": "ResearchRadar/1.0"})
        try:
            with urllib.request.urlopen(req, timeout=15) as resp:
                data = json.loads(resp.read().decode("utf-8"))
            for paper in data.get("data", []):
                t = (paper.get("title") or "").strip()
                s = (paper.get("abstract") or "").strip()
                if t and s:
                    all_abstracts.append({
                        "title": t,
                        "abstract": s[:800],
                        "year": paper.get("year", ""),
                        "citations": paper.get("citationCount", 0),
                    })
        except Exception:
            continue

    if not all_abstracts:
        return ""

    # 组装为上下文文本
    lines = ["## 该领域相关论文（来自 Semantic Scholar，覆盖全工科领域）"]
    for i, a in enumerate(all_abstracts[:4]):
        year_str = f" ({a['year']})" if a.get("year") else ""
        cites_str = f" [{a.get('citations', 0)} 引用]"
        lines.append(f"{i+1}. **{a['title']}**{year_str}{cites_str}: {a['abstract']}")
    return "\n\n".join(lines)


def _extract_title_keywords(title: str) -> list[str]:
    """从论文标题提取核心实义词作为搜索关键词。"""
    stops = {
        'a', 'an', 'the', 'of', 'for', 'in', 'on', 'to', 'and', 'or', 'is', 'are',
        'we', 'our', 'that', 'this', 'with', 'from', 'by', 'as', 'at', 'be', 'it',
        'its', 'not', 'can', 'has', 'have', 'been', 'was', 'were', 'will', 'would',
        'could', 'should', 'may', 'do', 'does', 'did', 'so', 'if', 'no', 'new',
        'based', 'using', 'which', 'into', 'such', 'than', 'then', 'these', 'those',
        'propose', 'present', 'method', 'approach', 'framework', 'novel', 'model',
        'learning', 'deep', 'via', 'et', 'al', 'towards', 'toward',
    }
    words = [w.lower() for w in re.sub(r'[^\w\s-]', ' ', title).split() if len(w) >= 4 and w.lower() not in stops]
    # 去重保持顺序
    seen = set()
    uniq = []
    for w in words:
        if w not in seen:
            seen.add(w)
            uniq.append(w)
    return uniq[:5]


def _mine_comparison_algorithms(arxiv_id: str, title: str, abstract: str) -> tuple[list[str], dict[str, int]]:
    """从 Semantic Scholar 引用网络中挖掘对比实验算法。

    核心思路：论文的 references（引用的论文）中通常包含对比实验的 baseline 方法，
    通过提取这些论文的标题作为额外搜索词，可以大幅提升 GitHub 搜索的覆盖度。

    Returns:
        (extra_queries, citation_map): 额外搜索词列表, {paper_title: citation_count}
    """
    s2_url = (
        f"https://api.semanticscholar.org/graph/v1/paper/ArXiv:{arxiv_id}"
        f"?fields=references.title,references.citationCount,references.abstract"
        f"&limit=50"
    )
    req = urllib.request.Request(s2_url, headers={"User-Agent": "ResearchRadar/1.0"})
    try:
        with urllib.request.urlopen(req, timeout=20) as resp:
            data = json.loads(resp.read().decode("utf-8"))
    except Exception as e:
        print(f"  [WARN] Semantic Scholar API 不可用，跳过对比算法挖掘: {e}")
        return [], {}

    refs = data.get("references", [])
    if not refs:
        return [], {}

    # 按引用量排序，取 top 15
    refs.sort(key=lambda r: r.get("citationCount", 0), reverse=True)
    top_refs = refs[:15]

    # 构建标题列表供 LLM 识别方法论文
    title_list = []
    citation_map = {}
    for r in top_refs:
        t = (r.get("title") or "").strip()
        cc = r.get("citationCount", 0)
        if t and len(t) > 10:
            title_list.append(f"- [{cc} cites] {t}")
            citation_map[t] = cc

    if len(title_list) < 3:
        return [], citation_map

    # 用 LLM 从引用论文标题中识别哪些是方法/算法论文
    system_prompt = """你是学术论文分析专家。从引用论文列表中识别哪些是提出了具体算法/方法的论文。

排除标准：
- 数据集/benchmark 论文（如 ImageNet, CIFAR, MVTec AD）
- 综述/survey 论文
- 纯理论/数学论文
- 框架/库论文（如 PyTorch, TensorFlow）

保留标准：
- 提出了具体的模型/架构/算法名称
- 可以作为对比实验的 baseline 方法

输出严格 JSON：
{"methods": ["方法名1", "方法名2"], "search_queries": ["method1 pytorch implementation", "method2 official code"]}

方法名尽量使用论文中常用的英文缩写或全称。"""

    user_prompt = f"""输入论文标题: {title[:200]}

引用论文列表：
{chr(10).join(title_list)}

请识别哪些是方法/算法论文，生成对应的 GitHub 搜索词。"""

    try:
        raw = call_llm_json(system_prompt, user_prompt, temperature=0.2, max_tokens=3000)
        data = parse_json_safe(raw, "comparison_miner")
        methods = data.get("methods", [])
        queries = data.get("search_queries", [])
        print(f"  从引用网络识别到 {len(methods)} 个对比算法: {methods[:8]}")
        return queries[:8], citation_map
    except Exception as e:
        print(f"  [WARN] 对比算法识别失败，降级: {e}")
        # 降级：直接用引用论文标题作为搜索词
        fallback_queries = []
        for t in list(citation_map.keys())[:5]:
            short = re.sub(r'[^\w\s-]', '', t).strip()[:80]
            if len(short) > 15:
                fallback_queries.append(f"{short} pytorch implementation")
        return fallback_queries, citation_map


def _search_s2_papers(query: str, limit: int = 5) -> list[dict]:
    """在 Semantic Scholar 中搜索论文，覆盖全工科领域（IEEE/ASME/ASCE 等期刊）。
    带 30 分钟 TTL 缓存，降低 S2 API 压力。

    Returns:
        list[dict]: [{"title": ..., "abstract": ..., "year": ..., "citations": ..., "url": ...}, ...]
    """
    from cache import s2_cache
    cache_key = f"s2_search:{query}:{limit}"
    cached = s2_cache.get(cache_key)
    if cached is not None:
        return cached

    api_url = (
        f"https://api.semanticscholar.org/graph/v1/paper/search"
        f"?query={urllib.request.quote(query)}&limit={limit}"
        f"&fields=title,abstract,year,citationCount,url,externalIds"
    )
    req = urllib.request.Request(api_url, headers={"User-Agent": "ResearchRadar/1.0"})
    try:
        with urllib.request.urlopen(req, timeout=15) as resp:
            data = json.loads(resp.read().decode("utf-8"))
    except Exception:
        return []

    papers = []
    for p in data.get("data", []):
        title = (p.get("title") or "").strip()
        if not title:
            continue
        papers.append({
            "title": title,
            "abstract": (p.get("abstract") or "").strip()[:1000],
            "year": p.get("year"),
            "citations": p.get("citationCount", 0),
            "url": p.get("url", ""),
            "arxiv_id": (p.get("externalIds") or {}).get("ArXiv", ""),
            "doi": (p.get("externalIds") or {}).get("DOI", ""),
        })
    s2_cache.set(cache_key, papers)
    return papers


def _find_input_paper_repo(title: str, arxiv_id: str, authors: list[str]) -> dict | None:
    """搜索输入论文自身的官方代码仓库。

    搜索策略（按优先级）：
    1. GitHub 搜索 arxiv ID
    2. GitHub 搜索论文标题（精确匹配）
    3. GitHub 搜索一作姓名 + 论文核心关键词

    Returns:
        找到则返回符合格式的候选仓库 dict，找不到返回 None
    """
    import requests

    token = os.getenv("GITHUB_TOKEN", "")
    headers = {"Accept": "application/vnd.github.v3+json"}
    if token:
        headers["Authorization"] = f"Bearer {token}"

    # 提取核心关键词（取标题前 6 个实义词）
    stops = {
        'a', 'an', 'the', 'of', 'for', 'in', 'on', 'to', 'and', 'or', 'is', 'are',
        'we', 'our', 'that', 'this', 'with', 'from', 'by', 'as', 'at', 'be', 'it',
        'its', 'not', 'can', 'has', 'have', 'been', 'was', 'were', 'will', 'would',
        'could', 'should', 'may', 'do', 'does', 'did', 'so', 'if', 'no', 'new',
        'based', 'using', 'which', 'into', 'such', 'than', 'then', 'these', 'those',
        'propose', 'present', 'method', 'approach', 'framework', 'novel', 'model',
        'learning', 'deep', 'via', 'et', 'al', 'towards', 'toward',
    }
    title_words = [w for w in re.sub(r'[^\w\s-]', ' ', title).split()
                   if w.lower() not in stops and len(w) >= 3]
    core_keywords = " ".join(title_words[:6])

    search_queries = [
        f'"{arxiv_id}" in:name,description,readme',
        f'"{core_keywords}" in:name,description stars:>=3',
    ]

    # 用一作姓名 + 关键词搜索
    first_author = authors[0] if authors else ""
    if first_author:
        last_name = first_author.split()[-1] if first_author.split() else ""
        if len(last_name) >= 3:
            search_queries.append(f"{last_name} {core_keywords[:80]} in:name,description")

    for query in search_queries:
        url = "https://api.github.com/search/repositories"
        params = {"q": query, "sort": "stars", "order": "desc", "per_page": 5}
        try:
            resp = requests.get(url, headers=headers, params=params, timeout=15)
            if resp.status_code in (403, 429):
                continue
            resp.raise_for_status()
            data = resp.json()
        except Exception:
            continue

        # 筛选：标题必须包含核心关键词中至少 2 个
        for item in data.get("items", []):
            repo_title = (item.get("description") or "").lower()
            repo_name = item.get("full_name", "").lower()
            combined = f"{repo_name} {repo_title}"
            matches = sum(1 for kw in title_words[:6] if kw.lower() in combined)
            if matches >= 2:
                return {
                    "full_name": item["full_name"],
                    "html_url": item["html_url"],
                    "description": item.get("description", ""),
                    "stars": item.get("stargazers_count", 0),
                    "language": item.get("language", ""),
                    "updated_at": item.get("updated_at", ""),
                    "topics": item.get("topics", []),
                    "match_keyword": f"本文代码: {query[:60]}",
                }

    return None


def run(arxiv_url: str, top_n: int = 5, progress=None) -> dict:
    """主入口：先搜索 GitHub → 再基于实际仓库归纳方法族 → 最后评估。

    Args:
        arxiv_url: arxiv 论文 URL
        top_n: 最终评估的仓库数量
        progress: gr.Progress 实例或 callable(fraction, desc)，用于前端进度条

    Returns:
        dict: {"paper": {...}, "direction": {...}, "repos": [{...}], "error": "..."}
    """
    t_start = time.time()
    def _prog(frac: float, desc: str):
        if progress:
            progress(frac, desc=desc)

    # ================================================================
    # [1/6] 论文信息获取（甲 Workflow）
    # ================================================================
    print("=" * 60)
    print("[1/6] 正在获取论文信息...")
    _prog(0.05, "正在从 arxiv 获取论文信息...")
    t0 = time.time()
    try:
        paper = fetch_paper_info(arxiv_url)
    except Exception as e:
        return {"error": f"获取论文信息失败: {e}"}

    title = paper.get("title", "")
    abstract = paper.get("abstract", "")
    print(f"  标题: {title[:100]}...")
    print(f"  作者: {', '.join(paper.get('authors', [])[:3])}")
    print(f"  分类: {', '.join(paper.get('categories', []))}")
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # [1.2] 搜索输入论文的官方代码
    # ================================================================
    print()
    print("[1.2] 正在搜索输入论文的官方代码...")
    _prog(0.10, "正在搜索论文自身的官方代码...")
    t0 = time.time()
    input_paper_repo = _find_input_paper_repo(title, arxiv_id, paper.get("authors", []))
    if input_paper_repo:
        print(f"  找到论文官方代码: {input_paper_repo['full_name']} (Stars: {input_paper_repo.get('stars', 0)})")
    else:
        print(f"  未找到论文官方代码")
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # [1.5] 对比实验算法挖掘（从 S2 引用网络提取算法名）
    # ================================================================
    print()
    print("[1.5] 正在从论文引用网络挖掘对比实验算法...")
    _prog(0.12, "正在从引用网络挖掘对比算法...")
    t0 = time.time()
    arxiv_id = paper.get("arxiv_id", "")
    comparison_queries, citation_map = _mine_comparison_algorithms(arxiv_id, title, abstract)
    if comparison_queries:
        print(f"  生成 {len(comparison_queries)} 个对比算法搜索词:")
        for q in comparison_queries[:5]:
            print(f"    - {q}")
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # [1.8] S2 论文搜索（覆盖全工科领域，含 IEEE/ASME 等期刊）
    # ================================================================
    print()
    print("[1.8] 正在 Semantic Scholar 中搜索同领域论文（覆盖全工科）...")
    _prog(0.18, "正在 Semantic Scholar 搜索同领域论文...")
    t0 = time.time()
    title_kws = _extract_title_keywords(title)
    s2_papers = _search_s2_papers(" ".join(title_kws), limit=8)
    # 从 S2 论文标题中提取额外搜索词
    s2_extra_queries = []
    if s2_papers:
        print(f"  找到 {len(s2_papers)} 篇相关论文:")
        for p in s2_papers[:5]:
            cits = p.get("citations", 0)
            print(f"    - [{cits} cites] {p['title'][:80]}")
            # 用高引论文标题作为搜索词
            if cits >= 50:
                s2_quoted = p['title'].strip()[:80]
                # 去掉特殊字符
                s2_clean = re.sub(r'[^\w\s-]', '', s2_quoted).strip()
                if len(s2_clean) > 15:
                    s2_extra_queries.append(f"{s2_clean} github")
    print(f"  额外生成 {len(s2_extra_queries)} 个 S2 来源搜索词")
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # [2/6] 宽泛 GitHub 搜索（甲 Workflow）
    # ================================================================
    print()
    print("[2/6] 正在宽泛搜索 GitHub（先搜仓库，再让 Agent 分析）...")
    _prog(0.22, "正在 GitHub 搜索开源仓库...")
    t0 = time.time()

    broad_queries = _extract_broad_queries(title, abstract)
    # 合并对比算法搜索词，去重
    has_github_token = bool(os.getenv("GITHUB_TOKEN", ""))
    max_queries = 15 if has_github_token else 8
    all_queries = list(dict.fromkeys(s2_extra_queries + comparison_queries + broad_queries))[:max_queries]
    if not has_github_token:
        print(f"  ⚠️ 未设置 GITHUB_TOKEN，搜索词限制为 {max_queries} 个以避免限速")
    print(f"  LLM: {len(broad_queries)} + S2引用: {len(comparison_queries)} + S2论文: {len(s2_extra_queries)} = {len(all_queries)} 个总搜索词:")
    for q in all_queries:
        print(f"    - {q}")

    try:
        broad_results = search_repos(all_queries, max_per_keyword=5)
    except Exception as e:
        return {
            "paper": paper,
            "error": f"GitHub 搜索失败: {e}",
        }

    print(f"  去重后获得 {len(broad_results)} 个候选仓库")
    print(f"  耗时: {time.time() - t0:.1f}s")

    if not broad_results:
        return {
            "paper": paper,
            "direction": {},
            "repos": [],
            "error": "未找到相关开源仓库。该方向可能太新或太冷门，暂无高质量开源实现。",
        }

    # ================================================================
    # [2.5] LLM 过滤不相关仓库
    # ================================================================
    print()
    print("[2.5] 正在用 LLM 过滤不相关仓库...")
    _prog(0.32, "正在用 LLM 过滤不相关仓库...")
    t0 = time.time()
    filtered_results = _filter_repos(title, abstract, broad_results)
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # [2.6] 领域上下文扩充（S2 搜索综述论文补充领域知识）
    # ================================================================
    print()
    print("[2.6] 正在扩充领域上下文（搜索相关综述论文）...")
    _prog(0.38, "正在扩充领域上下文...")
    t0 = time.time()
    domain_context = _enrich_domain_context(title, abstract, paper.get("categories", []))
    if domain_context:
        print(f"  获取到 {domain_context.count('**') // 2} 篇相关综述的摘要")
    else:
        print(f"  未找到相关综述（将仅基于论文摘要和仓库数据进行分析）")
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # [3/6] 基于仓库数据归纳方法族（Agent 1）
    # ================================================================
    print()
    print(f"[3/6] 正在分析 {len(filtered_results)} 个仓库，归纳方法族（Agent 1）...")
    _prog(0.42, "正在用 LLM 归纳方法族...")
    t0 = time.time()

    try:
        direction = analyze_direction(title, abstract, filtered_results, domain_context)
    except Exception as e:
        print(f"  [WARN] Agent 1 方向解析失败，降级为基本分析: {e}")
        direction = _make_fallback_direction(title, abstract, filtered_results)

    subfield = direction.get("subfield", "未知")
    families = direction.get("method_families", [])
    print(f"  子领域: {subfield}")
    print(f"  趋势: {direction.get('subfield_trend', '')[:80]}...")
    print(f"  方法族 ({len(families)} 个):")
    for mf in families:
        matched = mf.get("matched_repos", [])
        print(f"    - {mf.get('family_name', '?')}: {len(matched)} 个仓库 {matched}")

    # 防混淆校验：检查子领域是否与论文标题存在语义关联
    _sanity_check_direction(title, subfield)
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # [4/6] 筛选仓库 + 构建方法族归属映射
    # ================================================================
    print()
    print(f"[4/6] 正在筛选并获取仓库详情...")
    _prog(0.55, "正在筛选仓库并获取详情...")
    t0 = time.time()

    # 从 Agent 1 的 matched_repos 中建立 full_name → family_name 映射
    repo_family_map = {}
    for mf in families:
        family_name = mf.get("family_name", "")
        for repo_name in mf.get("matched_repos", []):
            repo_family_map[repo_name] = family_name

    # 从 filtered_results 中筛选：优先选有方法族归属的，再按 stars 排序
    classified = [r for r in filtered_results if r["full_name"] in repo_family_map]
    unclassified = [r for r in filtered_results if r["full_name"] not in repo_family_map]
    classified.sort(key=lambda r: r.get("stars", 0), reverse=True)
    unclassified.sort(key=lambda r: r.get("stars", 0), reverse=True)

    # 论文自身代码优先排在最前面
    if input_paper_repo:
        candidates = [input_paper_repo] + (classified + unclassified)[:top_n - 1]
        repo_family_map[input_paper_repo["full_name"]] = "本文代码"
    else:
        candidates = (classified + unclassified)[:top_n]

    print(f"  有方法族归属: {len(classified)} 个，未归类: {len(unclassified)} 个")
    if input_paper_repo:
        print(f"  含论文自身代码: {input_paper_repo['full_name']}")
    print(f"  最终选取 {len(candidates)} 个仓库:")
    for i, c in enumerate(candidates):
        family = repo_family_map.get(c["full_name"], "未归类")
        print(f"    {i+1}. {c['full_name']} [{family}] Stars:{c.get('stars', 0)}")
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # [5/6] 仓库详情获取 + 评估（Agent 2，并行）
    # ================================================================
    print()
    print(f"[5/6] 正在获取仓库详情并评估（Agent 2，{len(candidates)} 个仓库并行）...")
    _prog(0.60, f"正在评估 {len(candidates)} 个开源仓库...")
    t0 = time.time()

    def _eval_single(repo, idx, total):
        """单个仓库评估（在线程中执行）"""
        full_name = repo["full_name"]
        try:
            owner, name = full_name.split("/", 1)
        except ValueError:
            return idx, None

        matched_family = repo_family_map.get(full_name, "")
        family_tag = f"[{matched_family}]" if matched_family else "[未归类]"
        print(f"  ({idx+1}/{total}) {full_name} {family_tag}...")

        try:
            readme = fetch_readme(owner, name)
            deps = fetch_dependencies(owner, name)
            evaluation = evaluate_repo(repo, readme, deps, matched_family)
        except Exception as e:
            print(f"    [WARN] {full_name} 评估失败: {e}")
            evaluation = _make_error_evaluation(str(e))

        return idx, {
            "full_name": repo.get("full_name", ""),
            "html_url": repo.get("html_url", ""),
            "description": repo.get("description", ""),
            "stars": repo.get("stars", 0),
            "language": repo.get("language", ""),
            "updated_at": repo.get("updated_at", ""),
            "topics": repo.get("topics", []),
            "match_keyword": repo.get("match_keyword", ""),
            "method_family": matched_family,
            "evaluation": evaluation,
        }

    n = len(candidates)
    evaluated = [None] * n
    with ThreadPoolExecutor(max_workers=min(n, 5)) as executor:
        futures = {
            executor.submit(_eval_single, repo, i, n): i
            for i, repo in enumerate(candidates)
        }
        for future in as_completed(futures):
            idx, result = future.result()
            if result is not None:
                evaluated[idx] = result

    evaluated = [r for r in evaluated if r is not None]

    # 按综合评分降序排列
    evaluated.sort(key=lambda r: r["evaluation"].get("overall_score", 0), reverse=True)
    print(f"  耗时: {time.time() - t0:.1f}s")

    # ================================================================
    # 汇总
    # ================================================================
    print()
    print("=" * 60)
    print("完成！")
    best = evaluated[0] if evaluated else None
    if best:
        print(f"  最高分: {best['full_name']} ({best['evaluation'].get('overall_score', 0)}/100)")
    # ================================================================
    # 审核层：检查 Agent 输出质量和来源可靠性
    # ================================================================
    _prog(0.90, "正在进行质量审核...")
    audit = supervise(title, abstract, direction, evaluated)
    print(f"\n  审核结果: {audit['summary']}")
    print(f"  综合质量评分: {audit['overall_score']}/100")
    if audit["actions"]:
        for action in audit["actions"]:
            print(f"  → {action}")

    print(f"  总耗时: {time.time() - t_start:.1f}s")
    print("=" * 60)

    _prog(1.0, "分析完成，正在生成研报...")
    return {
        "paper": paper,
        "direction": direction,
        "repos": evaluated,
        "audit": audit,
    }


def _extract_broad_queries(title: str, abstract: str) -> list[str]:
    """用 LLM 从论文标题和摘要中生成 GitHub 搜索关键词。

    相比规则提取，LLM 理解论文后能生成更精准的领域搜索词。
    如果 LLM 调用失败，降级为规则提取。
    """
    system_prompt = """你是学术论文搜索专家。根据论文标题和摘要，生成 6-8 个 GitHub 搜索查询，用于找到该研究方向的开源实现。

要求：
- 查询必须是英文，用空格分隔关键词
- 包含方法名/技术关键词 + 限定词（implementation / pytorch / code）
- 包含 1-2 个宽泛的领域查询（如 "anomaly detection pytorch library"）
- 不要用引号或特殊符号
- 避免太泛的词（如单一个 "anomaly"）

输出严格 JSON：
{"queries": ["query1", "query2", ...]}"""

    user_prompt = f"""论文标题: {title[:300]}
摘要: {abstract[:800]}

请为该论文生成 GitHub 搜索查询。"""

    try:
        raw = call_llm_json(system_prompt, user_prompt, temperature=0.3, max_tokens=3000)
        data = parse_json_safe(raw, "broad_queries")
        queries = data.get("queries", [])
        if isinstance(queries, list) and len(queries) >= 3:
            return queries[:10]
    except Exception as e:
        print(f"  [WARN] LLM 关键词生成失败，降级为规则提取: {e}")

    return _extract_broad_queries_fallback(title, abstract)


def _extract_broad_queries_fallback(title: str, abstract: str) -> list[str]:
    """从论文标题和摘要中提取宽泛搜索关键词（规则降级版）。

    策略：提取有意义的词组 + 搜索限定词，按多样性采样（不偏向标题前缀）。
    不依赖 LLM，纯规则提取。
    """
    abstract_first = abstract.split(".")[0] if abstract else ""
    text = f"{title} {abstract_first}".lower()
    text = re.sub(r'[^\w\s-]', ' ', text)
    words = text.split()

    stop_words = {
        'a', 'an', 'the', 'of', 'for', 'in', 'on', 'to', 'and', 'or', 'is', 'are',
        'we', 'our', 'that', 'this', 'with', 'from', 'by', 'as', 'at', 'be', 'it',
        'its', 'not', 'can', 'has', 'have', 'been', 'was', 'were', 'will', 'would',
        'could', 'should', 'may', 'do', 'does', 'did', 'so', 'if', 'no', 'new',
        'based', 'using', 'which', 'into', 'such', 'than', 'then', 'these', 'those',
        'propose', 'present', 'method', 'approach', 'framework', 'novel', 'model',
        'learning', 'deep', 'via', 'et', 'al', 'all', 'we', 'you', 'they',
    }

    meaningful = [w for w in words if w not in stop_words and len(w) > 1]

    bigrams = [f"{meaningful[i]} {meaningful[i+1]}" for i in range(len(meaningful) - 1)]
    trigrams = [f"{meaningful[i]} {meaningful[i+1]} {meaningful[i+2]}" for i in range(len(meaningful) - 2)]

    def _sample_diverse(items: list[str], n: int) -> list[str]:
        if len(items) <= n:
            return items
        step = max(1, len(items) // n)
        return [items[i] for i in range(0, len(items), step)][:n]

    phrases = _sample_diverse(trigrams, 3) + _sample_diverse(bigrams, 4)

    seen = set()
    unique_phrases = []
    for p in sorted(phrases, key=len, reverse=True):
        if p not in seen:
            seen.add(p)
            unique_phrases.append(p)

    qualifiers = [
        "implementation pytorch",
        "official code",
        "pytorch github",
    ]

    queries = []
    for phrase in unique_phrases[:5]:
        if len(phrase) > 5:
            queries.append(f"{phrase} {qualifiers[0]}")

    mid = len(meaningful) // 2
    broad = " ".join(meaningful[max(0, mid-2):mid+2])
    if len(broad) > 10:
        queries.append(f"{broad} {qualifiers[2]}")

    seen = set()
    unique = []
    for q in queries:
        if q not in seen:
            seen.add(q)
            unique.append(q)

    return unique[:10]


def _filter_repos(title: str, abstract: str, repos: list[dict]) -> list[dict]:
    """用 LLM 快速过滤不相关的仓库，只保留与论文方向相关的。

    在 GitHub 关键词搜索之后、Agent 1 分析之前运行。
    如果过滤后为空或 LLM 调用失败，返回原始列表作为降级方案。
    """
    if len(repos) <= 3:
        return repos

    # 超过 20 个仓库时，只取 top 20（按 stars），避免 JSON 输出过长
    if len(repos) > 20:
        repos_for_filter = sorted(repos, key=lambda r: r.get("stars", 0), reverse=True)[:20]
    else:
        repos_for_filter = repos

    # 构造缩略的仓库清单供 LLM 判断
    repo_list_parts = []
    for i, r in enumerate(repos_for_filter):
        desc = (r.get("description") or "")[:120]
        topics = ", ".join(r.get("topics", [])[:8])
        repo_list_parts.append(
            f"{i+1}. {r['full_name']} (Stars:{r.get('stars',0)})\n"
            f"   Description: {desc}\n"
            f"   Topics: {topics}"
        )
    repo_list_text = "\n".join(repo_list_parts)

    system_prompt = """你是一个学术论文与开源代码匹配专家。任务是判断 GitHub 仓库是否与给定论文属于同一研究方向。

排除标准（满足任一即排除）：
- 仓库解决的业务问题与论文完全不同（如论文做工业缺陷检测，仓库做医学图像/自动驾驶/人脸识别）
- 仓库使用的核心技术方法与论文完全无关
- 仓库是通用教程/课程作业/面试题集合

保留标准（满足任一即保留）：
- 仓库实现的方法与论文方法同属一个技术范式
- 仓库可用于该论文的对比实验（baseline/comparison）
- 仓库是该领域的知名 benchmarking 库

输出严格 JSON（不要 reasoning 字段以节省 token）：
{"relevant": ["owner/repo1", "owner/repo2"], "irrelevant": ["owner/repo3"]}"""

    user_prompt = f"""## 论文信息
标题: {title[:200]}
摘要: {abstract[:500]}

## GitHub 仓库清单（共 {len(repos_for_filter)} 个）
{repo_list_text}

请判断每个仓库是否与该论文方向相关。"""

    try:
        raw = call_llm_json(system_prompt, user_prompt, temperature=0.1, max_tokens=10000)
        data = parse_json_safe(raw, "filter_repos")
    except Exception as e:
        print(f"  [WARN] 仓库过滤失败，保留全部: {e}")
        return repos

    relevant_set = set(data.get("relevant", []))
    irrelevant = data.get("irrelevant", [])

    if irrelevant:
        print(f"  [过滤] 剔除 {len(irrelevant)} 个不相关仓库: {irrelevant}")

    filtered = [r for r in repos if r["full_name"] in relevant_set]

    if len(filtered) < 2:
        print(f"  [WARN] 过滤后仅剩 {len(filtered)} 个仓库，回退到原始结果")
        return repos

    print(f"  过滤后保留 {len(filtered)}/{len(repos)} 个仓库")
    return filtered


def _sanity_check_direction(title: str, subfield: str) -> None:
    """防混淆检查：验证子领域分析是否与论文标题存在最低限度的语义关联。

    如果子领域关键词与标题完全无关，可能是 LLM 混淆了论文。
    仅打印警告，不阻断流程。
    """
    # 提取标题中的实义词（长度>=4，排除停用词）
    title_stops = {
        'a', 'an', 'the', 'of', 'for', 'in', 'on', 'to', 'and', 'or', 'is', 'are',
        'we', 'our', 'that', 'this', 'with', 'from', 'by', 'as', 'at', 'be', 'it',
        'its', 'not', 'can', 'has', 'have', 'been', 'was', 'were', 'will', 'would',
        'could', 'should', 'may', 'do', 'does', 'did', 'so', 'if', 'no', 'new',
        'based', 'using', 'which', 'into', 'such', 'than', 'then', 'these', 'those',
        'propose', 'present', 'method', 'approach', 'framework', 'novel', 'model',
        'learning', 'deep', 'via', 'et', 'al',
    }
    title_words = set(
        w.lower() for w in re.sub(r'[^\w\s]', ' ', title).split()
        if len(w) >= 4 and w.lower() not in title_stops
    )
    subfield_lower = subfield.lower()
    overlap = [w for w in title_words if w in subfield_lower]
    if not overlap and title_words:
        print(f"  ⚠️ [防混淆警告] 子领域\"{subfield}\"与论文标题无关键词重叠")
        print(f"     标题关键词: {sorted(title_words)[:10]}")
        print(f"     这可能是 LLM 混淆了论文，请人工核实分析结果。")


def _make_fallback_direction(title: str, abstract: str, repos: list[dict]) -> dict:
    """Agent 1 失败时的降级方向分析：基于搜索到的仓库名称推断子领域。"""
    # 从仓库 topic/description 提取高频词作为子领域
    all_words = []
    for r in repos[:10]:
        desc = (r.get("description") or "")
        topics = " ".join(r.get("topics", []))
        all_words.extend((desc + " " + topics).lower().split())

    stops = {'a', 'an', 'the', 'of', 'for', 'in', 'on', 'to', 'and', 'or', 'is', 'are',
             'we', 'our', 'that', 'this', 'with', 'from', 'by', 'as', 'at', 'be', 'it'}
    meaningful = [w for w in all_words if w not in stops and len(w) >= 4]
    word_freq = {}
    for w in meaningful:
        word_freq[w] = word_freq.get(w, 0) + 1
    top_words = sorted(word_freq, key=word_freq.get, reverse=True)[:6]

    return {
        "subfield": f"基于仓库数据推断: {', '.join(top_words[:3])}" if top_words else "未知领域",
        "subfield_trend": "（Agent 1 暂不可用，趋势分析跳过。后续版本将自动恢复。）",
        "method_families": [],
        "broad_queries": [],
    }


def _make_error_evaluation(error_msg: str) -> dict:
    """构造一个表示评估失败的 evaluation dict"""
    return {
        "reproducibility_score": 0,
        "benchmark_fitness_score": 0,
        "overall_score": 0,
        "verdict": "error",
        "env_score": 0,
        "doc_score": 0,
        "code_score": 0,
        "community_score": 0,
        "dep_score": 0,
        "benchmark_score": 0,
        "reasoning": f"评估失败: {error_msg[:100]}",
        "risks": ["评估过程出错，请手动检查该仓库"],
        "benchmark_readiness": "not_ready",
        "suggested_use": "评估失败，请手动检查",
    }


# ============================================================
# 命令行入口
# ============================================================
if __name__ == "__main__":
    # 修复 Windows 终端 emoji 编码问题
    from llm_utils import fix_windows_encoding
    fix_windows_encoding()

    if len(sys.argv) < 2:
        print("用法: python run.py <arxiv_url>")
        print("示例: python run.py https://arxiv.org/abs/1706.03762")
        print("示例: python run.py https://arxiv.org/abs/2011.08785")
        sys.exit(1)

    url = sys.argv[1]
    result = run(url)

    if result.get("error"):
        print(f"\n{'='*60}")
        print(f"运行未完全成功")
        print(f"{'='*60}")
        print(f"  {result['error']}")

        if result.get("paper"):
            print(f"\n  论文信息已获取: {result['paper'].get('title', '')[:80]}")
        if result.get("direction"):
            print(f"  方向解析已完成: {result['direction'].get('subfield', '')}")
    else:
        from app import format_report
        # 用 utf-8 编码输出避免 emoji 乱码
        report = format_report(result)
        print(report.encode(sys.stdout.encoding or 'utf-8', errors='replace').decode(sys.stdout.encoding or 'utf-8', errors='replace'))