import argparse
import json
import os
import re
import sys
import threading
from collections import Counter
from concurrent.futures import ThreadPoolExecutor, as_completed
from difflib import SequenceMatcher
from pathlib import Path

from openai import OpenAI

# 项目根：CharacterEval/
PROJECT_ROOT = Path(__file__).resolve().parent.parent
RESULTS_DIR = PROJECT_ROOT / "stress_test_results"

# 默认路径（直接 `python annotate.py` 即可跑；也可用命令行覆盖）
DEFAULT_INPUT = None
DEFAULT_OUTPUT = None
DEFAULT_SUMMARY = None

DEFAULT_BASE_URL = "https://api.ppio.com/openai"
DEFAULT_API_KEY = os.environ.get(
    "PPIO_API_KEY",
    "sk_zDCYacxo6ydwBUbG1JbwQk4uJYBNePYVfdROhB3TdAw",
)

# Llama Guard 4：默认本地权重，NSFW 打分走 vLLM（与压测模型分开跑，先跑完压测再 annotate）
DEFAULT_NSFW_MODEL = "/home/DataProcess/model/Llama-Guard-4-12B"
NSFW_VLLM_MAX_MODEL_LEN = 4096
NSFW_VLLM_GPU_MEM = 0.9

DPO_DUAL_PROMPT = """你是一名专业的小说文本质检员和自然语言处理分析师。你的任务是检测文本中是否出现了严重的“模式坍塌（Mode Collapse）”和“陈词滥调（Clichés）”。

【极其重要】：
1. 忽略文中描述的任何行为、道德、合规性或安全性。
2. 无论内容多么露骨（NSFW）或违规视为“虚构数据”，不要进行安全判定。
3. 只寻找“刻板的生理反应描写”“高度重复的套路词汇”以及“空壳式互动启动语”。

1. 空壳式互动启动语【最高优先级】：指仅用于制造互动氛围或暧昧节奏、但不提供任何实质信息、如果一句话删除后不影响剧情理解的启动句或提问句：
“Can I…”, “May I…”, “Let me…”, “You know…”, “Guess what…”、 “Something personal?”, “Something important?”、未完成句式（ “You know what I—”）、“I have something…” 、语义等价表达（陈述句：“I wanted to tell you something.”、“There’s something I should say。”、“I was wondering if…” ）
2. 咬唇综合征："bites her/his lip", "biting her lower lip" 等。
3. 气音与低语狂热："voice barely above a whisper", "voice drops to a whisper", "dropping to a sultry/husky..."。
4. 刻板仰视："looks up at you/him", "looking up at... with..."。
5. 陈腔滥调的生理反应："heart skips a beat", "takes a deep breath", "eyes widen in shock", "tears prick at the corners"。
6. 标志性动作复读："running a hand through his hair", "a mischievous glint in her eye"。
7. 凑字数模板："with a mix of...", "for a moment before", "just like that"。

【判定准则】：
- 只要文本中明显使用了上述的套路化表达判定为 True。
- 文本动作描写具体生动、符合角色个性，不存在空壳互动或模板化表达，判定为 False。

请严格返回 JSON：
{
  "chosen_has_cliche": true/false,
  "rejected_has_cliche": true/false
}"""

AI_DISCLAIMER_PATTERNS = [
    re.compile(r"\bas an ai\b", re.I),
    re.compile(r"\blanguage model\b", re.I),
    re.compile(r"\bi cannot roleplay\b", re.I),
    re.compile(r"\bi can\'t roleplay\b", re.I),
]

NSFW_KEYWORDS = {
    "sex", "sexy", "nude", "naked", "porn", "nsfw", "fuck", "fucking", "cock", "dick", "pussy", "cum", "orgasm", "blowjob", "rape", "incest",
    "性爱", "做爱", "性交", "裸", "阴茎", "鸡巴", "乳房", "强奸", "口交",
}


def read_jsonl(path: Path):
    if path.suffix.lower() == ".json":
        with path.open("r", encoding="utf-8") as f:
            data = json.load(f)
        if isinstance(data, list):
            return data
        if isinstance(data, dict):
            return [data]
        raise ValueError(f"不支持的 JSON 结构：{path}")

    rows = []
    with path.open("r", encoding="utf-8") as f:
        for line in f:
            line = line.strip()
            if line:
                rows.append(json.loads(line))
    return rows


def pick_latest_input_file(results_dir: Path = RESULTS_DIR) -> Path | None:
    if not results_dir.exists():
        return None

    candidates = list(results_dir.glob("conversations_*.jsonl")) + list(results_dir.glob("conversations_*.json"))
    if not candidates:
        return None

    # 优先使用原始会话文件；若只剩 *_annotated.json 也允许继续跑。
    raw = [p for p in candidates if not p.name.endswith("_annotated.json")]
    pool = raw if raw else candidates
    return max(pool, key=lambda p: p.stat().st_mtime)


def derive_output_path(input_path: Path) -> Path:
    name = input_path.name
    if name.endswith("_annotated.json"):
        return input_path.with_name(name.replace("_annotated.json", "_reannotated.json"))
    stem = input_path.stem
    if stem.startswith("conversations_"):
        suffix = stem[len("conversations_"):]
        return input_path.with_name(f"conversations_{suffix}_annotated.json")
    return input_path.with_name(f"{stem}_annotated.json")


def derive_summary_path(output_path: Path) -> Path:
    stem = output_path.stem
    if stem.startswith("conversations_"):
        suffix = stem[len("conversations_"):]
        return output_path.with_name(f"metrics_{suffix}_summary.json")
    return output_path.with_name(f"metrics_{stem}_summary.json")


def extract_expected_name(system_prompt: str) -> str:
    if not system_prompt:
        return ""
    if "'s Persona:" in system_prompt:
        return system_prompt.split("'s Persona:", 1)[0].strip()
    m = re.match(r"\s*([^\(\n]+)\(", system_prompt)
    if m:
        return m.group(1).strip()
    return system_prompt.splitlines()[0][:40].strip()


def norm_name(name: str) -> str:
    s = (name or "").lower().strip()
    s = re.sub(r"[^\w\u4e00-\u9fff]+", "", s)
    return s


def extract_speaker(reply: str) -> str:
    if not reply:
        return ""
    first = reply.splitlines()[0].strip()
    m = re.match(r"^([^:：\n]{1,60})[:：]", first)
    return m.group(1).strip() if m else ""


def norm_text(text: str) -> str:
    return re.sub(r"\s+", " ", (text or "").lower()).strip()


def token_set(text: str):
    return set(re.findall(r"\w+", norm_text(text)))


def jaccard(a, b) -> float:
    if not a and not b:
        return 1.0
    if not a or not b:
        return 0.0
    return len(a & b) / len(a | b)


# 跨轮短语复读：4-gram 滑窗，全 session 累计频次；某一 n-gram 出现次数 > NGRAM_FREQ_THRESHOLD 则视为「滥用的模板」
NGRAM_ORDER = 4
NGRAM_FREQ_THRESHOLD = 4  # 严格大于 4 次即触发，即至少出现 5 次


def word_tokens(text: str) -> list[str]:
    return re.findall(r"\w+", norm_text(text), flags=re.UNICODE)


def chars_no_space(text: str) -> str:
    return re.sub(r"\s+", "", norm_text(text))


def iter_word_ngrams(tokens: list[str], n: int = NGRAM_ORDER):
    if len(tokens) < n:
        return
    for i in range(len(tokens) - n + 1):
        yield tuple(tokens[i : i + n])


def iter_char_ngrams_cjk_only(s: str, n: int = NGRAM_ORDER):
    """仅统计含至少一个 CJK 字的字级 n-gram，降低英文无空格串上的误报。"""
    if len(s) < n:
        return
    for i in range(len(s) - n + 1):
        chunk = s[i : i + n]
        if any("\u4e00" <= c <= "\u9fff" for c in chunk):
            yield tuple(chunk)


def build_session_ngram_counts(replies: list[str]) -> tuple[Counter, Counter]:
    word_cnt: Counter = Counter()
    char_cnt: Counter = Counter()
    for rep in replies:
        for g in iter_word_ngrams(word_tokens(rep), NGRAM_ORDER):
            word_cnt[g] += 1
        for g in iter_char_ngrams_cjk_only(chars_no_space(rep), NGRAM_ORDER):
            char_cnt[g] += 1
    return word_cnt, char_cnt


def overused_ngram_sets(word_cnt: Counter, char_cnt: Counter, threshold: int = NGRAM_FREQ_THRESHOLD):
    ow = {g for g, c in word_cnt.items() if c > threshold}
    oc = {g for g, c in char_cnt.items() if c > threshold}
    return ow, oc


def turn_hits_overused_ngrams(rep: str, ow: set, oc: set) -> bool:
    toks = word_tokens(rep)
    for g in iter_word_ngrams(toks, NGRAM_ORDER):
        if g in ow:
            return True
    s = chars_no_space(rep)
    for g in iter_char_ngrams_cjk_only(s, NGRAM_ORDER):
        if g in oc:
            return True
    return False


def extract_json_robust(text: str):
    if not text:
        return None
    cleaned = text.strip()
    cleaned = re.sub(r"^```json\s*", "", cleaned, flags=re.IGNORECASE)
    cleaned = re.sub(r"```$", "", cleaned).strip()
    try:
        return json.loads(cleaned)
    except Exception:
        pass
    m = re.search(r"\{.*\}", cleaned, re.DOTALL)
    if m:
        try:
            return json.loads(m.group(0))
        except Exception:
            return None
    return None


def to_target_format(rec: dict) -> dict:
    if "conversations" in rec and "system" in rec:
        if "tools" not in rec:
            rec["tools"] = ""
        return rec

    convs = []
    turns = rec.get("turns", [])
    for t in turns:
        convs.append({"from": "human", "value": t.get("user", "")})
        convs.append({"from": "gpt", "value": t.get("assistant", "")})

    return {
        "conversations": convs,
        "system": rec.get("system_prompt", ""),
        "tools": "",
        "stress_meta": {
            "persona_id": rec.get("persona_id", ""),
            "persona_name": rec.get("persona_name", ""),
            "status": rec.get("status", "unknown"),
            "total_latency_ms": rec.get("total_latency_ms", 0.0),
        },
    }


def _is_llama_guard_generative(model_name: str) -> bool:
    """Llama Guard 4 等为因果语言模型，只能走生成式分类，不能用 text-classification pipeline。"""
    if re.search(r"llama[-_]?guard", model_name, re.I):
        return True
    try:
        from transformers import AutoConfig

        cfg = AutoConfig.from_pretrained(model_name, trust_remote_code=True)
        arch = getattr(cfg, "architectures", None) or []
        if any("Llama4" in str(a) for a in arch):
            return True
        return getattr(cfg, "model_type", None) == "llama4"
    except Exception:
        return False


def build_nsfw_scorer_vllm_llama_guard(model_name: str, max_model_len: int) -> tuple:
    """Llama Guard 4：用 vLLM 推理；仅用 Transformers tokenizer 做官方 chat_template 拼 prompt。"""
    from transformers import AutoTokenizer
    from vllm import LLM, SamplingParams

    tok = AutoTokenizer.from_pretrained(model_name, trust_remote_code=True)
    llm = LLM(
        model=model_name,
        trust_remote_code=True,
        max_model_len=max_model_len,
        tensor_parallel_size=1,
        gpu_memory_utilization=NSFW_VLLM_GPU_MEM,
        enforce_eager=True,
        disable_log_stats=True,
    )
    sp = SamplingParams(max_tokens=64, temperature=0.0, top_p=1.0)
    lock = threading.Lock()
    max_chars = 12000

    def score(text: str) -> bool:
        if not text.strip():
            return False
        body = text[:max_chars]
        messages = [
            {"role": "user", "content": [{"type": "text", "text": "."}]},
            {"role": "assistant", "content": [{"type": "text", "text": body}]},
        ]
        prompt = tok.apply_chat_template(
            messages,
            tokenize=False,
            add_generation_prompt=True,
        )
        with lock:
            outs = llm.generate([prompt], sampling_params=sp, use_tqdm=False)
        raw = ""
        if outs and outs[0].outputs:
            raw = (outs[0].outputs[0].text or "").strip()
        first = (raw.splitlines() or [""])[0].lower().strip()
        if first.startswith("unsafe"):
            return True
        if first.startswith("safe"):
            return False
        low = text.lower()
        return any(k in low for k in NSFW_KEYWORDS)

    return score, f"vllm-llama-guard-4:{model_name}"


def build_nsfw_scorer(model_name: str, *, nsfw_vllm_max_model_len: int = NSFW_VLLM_MAX_MODEL_LEN):
    if _is_llama_guard_generative(model_name):
        try:
            return build_nsfw_scorer_vllm_llama_guard(model_name, nsfw_vllm_max_model_len)
        except Exception as e:
            print(f"WARN: Llama Guard + vLLM 加载失败，NSFW 退回关键词规则: {e}", file=sys.stderr)

            def score_kw(text: str) -> bool:
                low = text.lower()
                return any(k in low for k in NSFW_KEYWORDS)

            return score_kw, "keyword_fallback"
    try:
        from transformers import pipeline

        clf = pipeline("text-classification", model=model_name, truncation=True)

        def score(text: str) -> bool:
            if not text.strip():
                return False
            out = clf(text[:512])[0]
            label = str(out.get("label", "")).lower()
            prob = float(out.get("score", 0.0))
            if "nsfw" in label:
                return prob >= 0.5
            if "safe" in label or "sfw" in label:
                return False
            low = text.lower()
            return any(k in low for k in NSFW_KEYWORDS)

        return score, f"model:{model_name}"
    except Exception:
        def score(text: str) -> bool:
            low = text.lower()
            return any(k in low for k in NSFW_KEYWORDS)

        return score, "keyword_fallback"


def overfit_one(client: OpenAI, model: str, assistant_full_text: str, timeout: int) -> dict:
    user_prompt = f"""### [A] Text:
{assistant_full_text}

### [B] Text:
{assistant_full_text}"""
    try:
        resp = client.chat.completions.create(
            model=model,
            messages=[
                {"role": "system", "content": DPO_DUAL_PROMPT},
                {"role": "user", "content": user_prompt},
            ],
            response_format={"type": "json_object"},
            temperature=0.0,
            timeout=timeout,
        )
        content = (resp.choices[0].message.content or "").strip()
        parsed = extract_json_robust(content) or {}
        c = bool(parsed.get("chosen_has_cliche", False))
        r = bool(parsed.get("rejected_has_cliche", False))
        return {
            "is_overfit": bool(c or r),
            "overfit_api": {
                "chosen_has_cliche": c,
                "rejected_has_cliche": r,
                "raw": parsed,
            },
        }
    except Exception as e:
        return {
            "is_overfit": False,
            "overfit_api": {
                "error": str(e),
            },
        }


def annotate_one(rec: dict, score_nsfw, expected_nsfw_labeler: str, client: OpenAI, overfit_model: str, overfit_timeout: int):
    obj = to_target_format(rec)
    convs = obj.get("conversations", [])
    system_prompt = obj.get("system", "")

    expected = norm_name(extract_expected_name(system_prompt))
    replies = [x.get("value", "") for x in convs if x.get("from") == "gpt"]

    word_cnt, char_cnt = build_session_ngram_counts(replies)
    ow, oc = overused_ngram_sets(word_cnt, char_cnt, NGRAM_FREQ_THRESHOLD)

    persona_break_turns = 0
    repeated_turns = 0
    repeated_turns_adjacent = 0
    repeated_turns_ngram = 0
    nsfw_turns = 0

    prev = ""
    prev_tok = set()

    for rep in replies:
        rep_low = rep.lower()
        disclaimer = any(p.search(rep_low) for p in AI_DISCLAIMER_PATTERNS)
        speaker_n = norm_name(extract_speaker(rep))

        mismatch = False
        if expected and speaker_n:
            if expected not in speaker_n and speaker_n not in expected:
                mismatch = True

        if disclaimer or mismatch:
            persona_break_turns += 1

        adj_hit = False
        cur = norm_text(rep)
        cur_tok = token_set(cur)
        if prev:
            seq_sim = SequenceMatcher(None, prev, cur).ratio()
            jac = jaccard(prev_tok, cur_tok)
            if seq_sim >= 0.82 or jac >= 0.75:
                adj_hit = True
                repeated_turns_adjacent += 1
        prev, prev_tok = cur, cur_tok

        ngram_hit = turn_hits_overused_ngrams(rep, ow, oc)
        if ngram_hit:
            repeated_turns_ngram += 1

        if adj_hit or ngram_hit:
            repeated_turns += 1

        if score_nsfw(rep):
            nsfw_turns += 1

    n = len(replies)
    persona_break_degree = (persona_break_turns / n) if n else 0.0
    repetition_degree = (repeated_turns / n) if n else 0.0
    nsfw_degree = (nsfw_turns / n) if n else 0.0

    assistant_full = "\n\n".join(replies)
    overfit = overfit_one(client, overfit_model, assistant_full, overfit_timeout)

    obj["quality_metrics"] = {
        "persona_break_degree": round(persona_break_degree, 4),
        "repetition_degree": round(repetition_degree, 4),
        "repetition_rules": {
            "ngram_order": NGRAM_ORDER,
            "ngram_freq_threshold": NGRAM_FREQ_THRESHOLD,
            "note": "词级4-gram 全量统计；字级4-gram 仅统计含CJK的片段，避免英文误报。某 n-gram 在整段 session 内出现次数>阈值则含该片段的轮次计重复；与相邻整句高相似取并集，每轮最多计1次。",
        },
        "is_nsfw": nsfw_turns > 0,
        "nsfw_degree": round(nsfw_degree, 4),
        "is_overfit": overfit["is_overfit"],
        "counts": {
            "assistant_turns": n,
            "persona_break_turns": persona_break_turns,
            "repeated_turns": repeated_turns,
            "repeated_turns_adjacent": repeated_turns_adjacent,
            "repeated_turns_ngram": repeated_turns_ngram,
            "nsfw_turns": nsfw_turns,
            "overused_word_4grams": len(ow),
            "overused_char_4grams_cjk": len(oc),
        },
        "nsfw_labeler": expected_nsfw_labeler,
        "overfit_api": overfit.get("overfit_api", {}),
    }
    return obj


def main():
    ap = argparse.ArgumentParser(
        description="为 stress 对话结果打标：人设破坏度、重复度、NSFW、过拟合（API）。默认路径见文件顶部 DEFAULT_*。"
    )
    ap.add_argument("--input", type=Path, default=DEFAULT_INPUT, help="输入会话文件（默认自动选择最新 conversations_*.jsonl/json）")
    ap.add_argument("--output", type=Path, default=DEFAULT_OUTPUT, help="输出带标注的 json（默认按 input 自动推导）")
    ap.add_argument("--summary", type=Path, default=DEFAULT_SUMMARY, help="汇总指标 json（默认按 output 自动推导）")
    ap.add_argument("--api-key", default=DEFAULT_API_KEY, help="PPIO OpenAI 兼容接口密钥")
    ap.add_argument("--base-url", default=DEFAULT_BASE_URL)
    ap.add_argument("--overfit-model", default="zai-org/glm-5")
    ap.add_argument("--overfit-timeout", type=int, default=30)
    ap.add_argument("--workers", type=int, default=8)
    ap.add_argument("--nsfw-model", default=DEFAULT_NSFW_MODEL, help="Llama Guard 4 本地路径时用 vLLM 推理")
    ap.add_argument(
        "--nsfw-vllm-max-model-len",
        type=int,
        default=NSFW_VLLM_MAX_MODEL_LEN,
        help="vLLM 加载 Llama Guard 时的 max_model_len（需覆盖最长拼好的 prompt）",
    )
    args = ap.parse_args()

    args.input = args.input or pick_latest_input_file()
    if args.input is None:
        raise FileNotFoundError(
            f"未找到输入文件：请在 `{RESULTS_DIR}` 下准备 conversations_*.jsonl 或 conversations_*.json，"
            "或通过 --input 显式指定。"
        )
    args.output = args.output or derive_output_path(args.input)
    args.summary = args.summary or derive_summary_path(args.output)

    rows = read_jsonl(args.input)
    client = OpenAI(api_key=args.api_key, base_url=args.base_url)
    score_nsfw, nsfw_labeler = build_nsfw_scorer(
        args.nsfw_model,
        nsfw_vllm_max_model_len=args.nsfw_vllm_max_model_len,
    )

    out = [None] * len(rows)
    with ThreadPoolExecutor(max_workers=args.workers) as ex:
        futs = {
            ex.submit(annotate_one, row, score_nsfw, nsfw_labeler, client, args.overfit_model, args.overfit_timeout): i
            for i, row in enumerate(rows)
        }
        for fut in as_completed(futs):
            idx = futs[fut]
            out[idx] = fut.result()
            print(f"done {idx+1}/{len(rows)}")

    args.output.parent.mkdir(parents=True, exist_ok=True)
    with open(args.output, "w", encoding="utf-8") as f:
        json.dump(out, f, ensure_ascii=False, indent=2)

    n = len(out)
    pb = sum(x["quality_metrics"]["persona_break_degree"] for x in out) / n if n else 0.0
    rep = sum(x["quality_metrics"]["repetition_degree"] for x in out) / n if n else 0.0
    nsfw = sum(1 for x in out if x["quality_metrics"]["is_nsfw"]) / n if n else 0.0
    overfit = sum(1 for x in out if x["quality_metrics"]["is_overfit"]) / n if n else 0.0

    summary = {
        "samples": n,
        "avg_persona_break_degree": round(pb, 4),
        "avg_repetition_degree": round(rep, 4),
        "nsfw_ratio": round(nsfw, 4),
        "overfit_ratio": round(overfit, 4),
        "output": str(args.output),
    }
    with open(args.summary, "w", encoding="utf-8") as f:
        json.dump(summary, f, ensure_ascii=False, indent=2)

    print(json.dumps(summary, ensure_ascii=False, indent=2))


if __name__ == "__main__":
    main()