#!/usr/bin/env python3
"""WildTrace — model evaluation harness (evidence-withheld).

Runs ANY model over the 481 tasks and writes its raw answers. The model sees ONLY
the document + question (the clues and rubric are never shown). Documents longer than
the model's context cap are scored 0 (out_of_context_scope) WITHOUT being sent.

Plug in your own model by either:
  (a) editing `config.json` to point at any OpenAI-compatible /chat/completions endpoint
      (base_url + api_key_env + model), the default path; or
  (b) replacing the body of `call_model()` below with any callable you like.

Output: results/<model>.responses.json  — feed this to run_judge.py to score it.

Usage:
  export API_KEY=sk-...
  python run_eval.py --config config.json --data ../data/wildtrace_strict481.with_answers.json \
                     --corpus ../corpus --out ../results/mymodel.responses.json
Resumable: re-run to retry transient failures (only out_of_context_scope is terminal).
"""
import argparse, json, os, re, time, urllib.request, urllib.error
from concurrent.futures import ThreadPoolExecutor, as_completed
from threading import Lock

# ── exact evaluation prompt (changing this materially shifts scores — keep verbatim) ──
EVAL_PROMPT = ("Answer using ONLY the document below. Include every specific detail from the text.\n\n"
               "Question: {q}\n\nDocument:\n{ctx}")

# ── per-model context caps, in CHARACTERS (EN docs / CJK docs). These are the values used in
#    the paper; a doc longer than the cap is out_of_context_scope (scored 0). For a NEW model,
#    add an entry with its real native window (probe it — do NOT inherit an older version's cap),
#    or rely on "default". ~3.3 chars/token (EN), ~1.5 chars/token (CJK). ──
def load_caps(cfg):
    caps = dict(DEFAULT_CAPS); caps.update(cfg.get("context_caps", {}))
    return caps
DEFAULT_CAPS = {
    "default":      {"en": 2_850_000, "cjk": 850_000},
    "gpt-4.1":      {"en": 2_850_000, "cjk": 850_000}, "gpt-5.1": {"en": 1_050_000, "cjk": 320_000},
    "gpt-5.4":      {"en": 2_850_000, "cjk": 850_000}, "gpt-5.5": {"en": 2_850_000, "cjk": 850_000},
    "qwen3.5-plus": {"en": 2_850_000, "cjk": 850_000}, "qwen3.6-plus": {"en": 2_850_000, "cjk": 850_000},
    "qwen3-max":    {"en":   690_000, "cjk": 210_000}, "qwen3.7-max": {"en": 2_850_000, "cjk": 850_000},
    "qwen3.7-plus": {"en": 2_850_000, "cjk": 850_000}, "gemini-2.5-pro": {"en": 2_850_000, "cjk": 850_000},
    "gemini-3.1":   {"en": 2_850_000, "cjk": 850_000}, "deepseek-v3.2": {"en": 1_200_000, "cjk": 400_000},
    "deepseek-v4":  {"en": 2_850_000, "cjk": 850_000}, "minimax-m2.7": {"en": 570_000, "cjk": 220_000},
    "claude-opus-4.6": {"en": 2_850_000, "cjk": 850_000}, "claude-opus-4.8": {"en": 2_850_000, "cjk": 850_000},
    "kimi-k2.6":    {"en": 1_000_000, "cjk": 320_000}, "glm-5.2": {"en": 2_850_000, "cjk": 850_000},
    "doubao-seed-2.1": {"en": 1_000_000, "cjk": 320_000},
}


def is_cjk(text):
    return sum(1 for ch in text[:4000] if "一" <= ch <= "鿿") > 20


def post(url, key, payload, timeout):
    last = None
    for attempt in range(5):
        if attempt:
            time.sleep(min(60, 12 * attempt))
        try:
            req = urllib.request.Request(url, data=json.dumps(payload).encode(),
                                         headers={"Authorization": f"Bearer {key}", "Content-Type": "application/json"})
            with urllib.request.urlopen(req, timeout=timeout) as r:
                return json.loads(r.read()), None
        except urllib.error.HTTPError as e:
            body = e.read().decode("utf-8", "replace")[:300]
            last = f"HTTP {e.code}: {body}"
            if "rate limit" in body.lower() or "429" in body or "http code: 5" in body:
                time.sleep(45)
        except Exception as e:
            last = f"{type(e).__name__}: {str(e)[:200]}"
    return None, last


def call_model(prompt, cfg):
    """Return (response_text, error). REPLACE THIS BODY to use a non-OpenAI backend.

    Default: OpenAI-compatible /chat/completions. Reasoning models need a large completion
    budget (truncated reasoning deflates scores ~7pp). Some models reject `temperature`
    (e.g. Anthropic Opus, GPT-5.4) — set "send_temperature": false in config for those.
    """
    payload = {"model": cfg["model"],
               "messages": [{"role": "user", "content": prompt}],
               "max_tokens": cfg.get("max_tokens", 32768)}
    if cfg.get("send_temperature", True):
        payload["temperature"] = cfg.get("temperature", 0.1)
    data, err = post(cfg["base_url"], os.environ[cfg["api_key_env"]], payload,
                     cfg.get("timeout_s", 900))
    if err:
        return None, err
    txt = data.get("choices", [{}])[0].get("message", {}).get("content", "")
    if not txt and isinstance(data.get("content"), list):  # Anthropic-native content blocks
        txt = "".join(b.get("text", "") for b in data["content"] if b.get("type") == "text")
    if not txt or len(txt) < 10:
        return None, "empty_response"
    return txt, None


def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("--config", default="config.json")
    ap.add_argument("--data", required=True, help="wildtrace_strict481.with_answers.json (or questions_only.jsonl)")
    ap.add_argument("--corpus", required=True, help="path to corpus/ directory")
    ap.add_argument("--out", required=True, help="output responses json")
    ap.add_argument("--workers", type=int, default=4)
    args = ap.parse_args()
    cfg = json.load(open(args.config))
    caps = load_caps(cfg)
    cap_key = cfg["model"] if cfg["model"] in caps else cfg.get("cap_key", "default")

    rows = ([json.loads(l) for l in open(args.data) if l.strip()]
            if args.data.endswith(".jsonl") else json.load(open(args.data)))
    rows = {r["question_id"]: r for r in rows}

    done = {}
    if os.path.exists(args.out):
        for r in json.load(open(args.out)):
            resp = r["model_response"]
            if resp and (not resp.startswith("[ERROR") or resp.startswith("[ERROR out_of_context_scope")):
                done[r["question_id"]] = r  # terminal: keep; transient errors retry
    work = [qid for qid in rows if qid not in done]
    _docs, lock = {}, Lock()

    def doc(cf):
        if cf not in _docs:
            _docs[cf] = open(os.path.join(args.corpus, os.path.basename(cf)), encoding="utf-8", errors="ignore").read()
        return _docs[cf]

    work.sort(key=lambda q: len(doc(rows[q].get("corpus_file", ""))))  # short docs first
    print(f"model={cfg['model']} cap_key={cap_key} | to do={len(work)} (done={len(done)})", flush=True)

    def run(qid):
        r = rows[qid]; gt = r.get("ground_truth", {})
        q = r.get("question_text") or gt.get("question_text")
        text = doc(r["corpus_file"])
        cap = caps[cap_key]["cjk" if is_cjk(text) else "en"]
        if len(text) > cap:
            return qid, {"question_id": qid, "paradigm": r.get("paradigm"),
                         "model_response": f"[ERROR out_of_context_scope doc={len(text)} cap={cap}]",
                         "doc_chars": len(text), "cap_chars": cap}, "oos"
        resp, err = call_model(EVAL_PROMPT.format(q=q, ctx=text[:cap]), cfg)
        if resp is None:
            return qid, None, f"FAIL {str(err)[:60]}"  # transient -> not persisted, retries on resume
        return qid, {"question_id": qid, "paradigm": r.get("paradigm"),
                     "model_response": resp, "doc_chars": len(text), "cap_chars": cap}, "ok"

    n = 0
    with ThreadPoolExecutor(max_workers=args.workers) as ex:
        for fut in as_completed([ex.submit(run, q) for q in work]):
            qid, row, tag = fut.result(); n += 1
            if row:
                with lock:
                    done[qid] = row
                    json.dump(list(done.values()), open(args.out, "w"), ensure_ascii=False, indent=2)
            if n % 20 == 0 or tag.startswith("FAIL"):
                print(f"[{n}/{len(work)}] {qid[:40]} -> {tag}", flush=True)
    print(f"DONE: {len(done)}/{len(rows)} -> {args.out}", flush=True)


if __name__ == "__main__":
    main()