#!/usr/bin/env python3
"""Deterministic QA of publish/ (variants + generated): formats, keys, excerpts, variant/parent consistency,
duplicates, leakage into val/test and the benchmark; writes stats.json and QA_REPORT.md.

    python qa.py            # report only
    python qa.py --drop     # also remove records with hard errors (format, leakage, duplicates) from publish/
"""
import argparse
import glob
import json
import re
from collections import Counter, defaultdict

from common import PUBLISH, RUNS, load_originals, norm_pl, read_jsonl, shingles, write_jsonl
from tasks import SYNTH, parse, rubric_error, tf_truth
from wiki import canon

REPO_SRV = "/scratch/WarsawModelTrainersHackathon-main"
HARD = {"format", "key", "excerpt", "leak_eval", "dup_exact", "parent_mismatch"}


def body(r):
    """Task content without header, instructions and source texts (for duplicate detection)."""
    p = parse(r)
    if r["task_type"] == "true_false":
        return " ".join(t for _, t in p["statements"])
    if r["task_type"] == "closed_choice":
        return " ".join(p["pre"][-1:] + [t for _, t in p["options"]])
    if r["task_type"] == "essay":
        return (p["thesis"] or "") + " " + " ".join(p["elements"])
    return " ".join(p["pre"])


def check(r, parents):
    f = []
    q, t, p = r.get("question", ""), r.get("task_type"), r.get("max_points")
    if not all(r.get(k) not in (None, "") for k in ("id", "epoch", "requirement", "task_type", "max_points",
                                                     "question", "rubric", "key_answer")):
        f.append(("format", "missing field"))
    if not re.match(rf"^Zadanie \d+\. \(0[–-]{p}\)$", q.split("\n")[0]):
        f.append(("format", "header"))
    if SYNTH in q:
        f.append(("format", "synthetic source label left"))
    if t == "closed_choice":
        if len(re.findall(r"(?m)^[A-D]\. ", q)) != 4 or r["key_answer"] not in list("ABCD"):
            f.append(("key", "mcq options/key"))
    elif t == "true_false":
        if len(re.findall(r"(?m)^[1-3]\. ", q)) != 3 or not re.fullmatch(r"1\. [PF], 2\. [PF], 3\. [PF]", r["key_answer"]):
            f.append(("key", "tf statements/key"))
    elif t == "essay":
        gk = r.get("grading_key") or {}
        if p != 15 or len(gk.get("elementy", [])) != 3 or "B. SPÓJNOŚĆ" not in r["rubric"]:
            f.append(("format", "essay key/rubric"))
    elif t and t.startswith("open"):
        if rubric_error(r["rubric"], p):
            f.append(("format", "open rubric"))
    for s in r.get("source_excerpt") or []:
        if canon(s["text"]) not in canon(q):
            f.append(("excerpt", "excerpt not in question"))
        if not (100 <= len(s["text"]) <= 700):
            f.append(("excerpt", f"excerpt length {len(s['text'])}"))
        if f"Fragment artykułu „{s['title']}”" not in q:
            f.append(("excerpt", "label"))
    if r.get("parent_id"):
        par = parents.get(r["parent_id"])
        if not par:
            f.append(("parent_mismatch", "parent missing"))
        elif t == "closed_choice":
            pp, vp = parse(par), parse(r)
            po, vo = dict(pp["options"]), dict(vp["options"])
            if sorted(canon(x) for x in po.values()) != sorted(canon(x) for x in vo.values()) or \
                    canon(po.get(par["key_answer"][:1], "")) != canon(vo.get(r["key_answer"], "?")):
                f.append(("parent_mismatch", "mcq options/correct option differ from parent"))
        elif t == "true_false":
            if sorted(tf_truth(par["key_answer"]).values()) != sorted(tf_truth(r["key_answer"]).values()):
                f.append(("parent_mismatch", "tf truth values differ from parent"))
    return f


def grams(s, n=5):
    t = norm_pl(s).split()
    return {" ".join(t[i:i + n]) for i in range(max(0, len(t) - n + 1))}


def main(a):
    parents = {r["id"]: r for r in load_originals()}
    recs = []
    for fam in ("variants", "generated"):
        for fn in sorted(glob.glob(str(PUBLISH / fam / "*" / "*.jsonl"))):
            for r in read_jsonl(fn):
                recs.append((fam, fn, r))
    flags = defaultdict(list)
    for fam, fn, r in recs:
        for k in check(r, parents):
            flags[r["id"]].append(k)
    # leakage into val/test/benchmark (80-char shingles, >= 2 shared)
    ev = set()
    for s in ("val", "test"):
        for x in read_jsonl(f"{REPO_SRV}/output/sft-v2.1/{s}.jsonl"):
            ev |= shingles(x["messages"][0]["content"])
    for fn in glob.glob(f"{REPO_SRV}/benchmark/exams_claude_extracted/*.json"):
        try:
            d = json.load(open(fn, encoding="utf-8"))
        except Exception:
            continue
        for qq in (d.get("questions") or []) if isinstance(d, dict) else []:
            ev |= shingles(qq if isinstance(qq, str) else json.dumps(qq, ensure_ascii=False))
    for fam, fn, r in recs:
        if len(shingles(r["question"]) & ev) >= 2:
            flags[r["id"]].append(("leak_eval", "shares >=2 shingles with val/test/benchmark"))
    # duplicates: exact (normalised body prefix) and near (word 5-gram Jaccard >= 0.8), variant-parent pairs excluded
    seen = {}
    for pid, par in parents.items():
        seen.setdefault(norm_pl(body(par))[:200], pid)
    for fam, fn, r in recs:
        k = norm_pl(body(r))[:200]
        if k in seen and seen[k] != r.get("parent_id"):
            flags[r["id"]].append(("dup_exact", f"same text as {seen[k]}"))
        else:
            seen.setdefault(k, r["id"])
    index, G = defaultdict(set), {}
    for fam, fn, r in recs:
        g = grams(body(r))
        G[r["id"]] = g
        for x in list(g)[:40]:
            index[x].add(r["id"])
    near = 0
    for fam, fn, r in recs:
        cand = Counter(o for x in list(G[r["id"]])[:40] for o in index[x] if o != r["id"])
        for o, c in cand.items():
            if c >= 3 and o < r["id"]:
                a_, b_ = G[r["id"]], G[o]
                if a_ and len(a_ & b_) / len(a_ | b_) >= 0.8:
                    flags[r["id"]].append(("dup_near", f"~{o}"))
                    near += 1
                    break
    # stats
    st = {"families": {}, "kinds_total": Counter(), "by_epoch_type": Counter(), "verify": Counter(),
          "paraphrase": Counter(), "grounding": Counter(), "with_source": Counter()}
    kind_of = lambda t: "essay" if t == "essay" else "closed" if t in ("closed_choice", "true_false") else "open"
    for fam, fn, r in recs:
        st["families"][fam] = st["families"].get(fam, 0) + 1
        st["kinds_total"][kind_of(r["task_type"])] += 1
        st["by_epoch_type"][f"{fam}|{r['epoch']}|{r['task_type']}"] += 1
        st["verify"][f"{fam}|{r['verify']['status']}|{r['verify']['method']}"] += 1
        if fam == "variants":
            st["paraphrase"][r["paraphrase"]["kind"]] += 1
        else:
            st["grounding"][r.get("grounding")] += 1
        st["with_source"][f"{fam}|{bool(r.get('source_excerpt'))}"] += 1
    fl = Counter(k for v in flags.values() for k, _ in v)
    hard_ids = {i for i, v in flags.items() if any(k in HARD for k, _ in v)}
    wc = [x for fn in glob.glob(str(PUBLISH / "wiki_check" / "*.jsonl")) for x in read_jsonl(fn)]
    st["wiki_check"] = Counter(f"{x['status']}|{'evidence' if x['evidence_verified'] else 'no_evidence'}" for x in wc)
    st["flags"] = fl
    st["hard_flagged"] = len(hard_ids)
    st = json.loads(json.dumps(st))
    if a.drop and hard_ids:
        for fn in sorted({fn for fam, fn, r in recs}):
            rows = read_jsonl(fn)
            keep = [r for r in rows if r["id"] not in hard_ids]
            if len(keep) != len(rows):
                write_jsonl(fn, keep)
        st["dropped"] = len(hard_ids)
    kt = Counter(st["kinds_total"])
    if a.drop:
        for fam, fn, r in recs:
            if r["id"] in hard_ids:
                kt[kind_of(r["task_type"])] -= 1
    st["kinds_total_published"] = dict(kt)
    (PUBLISH / "stats.json").write_text(json.dumps(st, ensure_ascii=False, indent=1), encoding="utf-8")
    write_jsonl(RUNS / "qa_flags.jsonl", [{"id": i, "flags": [f"{k}: {m}" for k, m in v]} for i, v in flags.items()])
    lines = ["# QA report (generated by scripts/qa.py)", "",
             f"Records checked: {len(recs)} ({st['families']}).", "",
             "## Totals per kind (variants + generated)", "", "| kind | records | published |", "|---|---|---|"]
    for k in ("closed", "open", "essay"):
        lines.append(f"| {k} | {st['kinds_total'].get(k, 0)} | {kt.get(k, 0)} |")
    lines += ["", "## Flags", "", "| flag | count | hard (dropped with --drop) |", "|---|---|---|"]
    for k, v in fl.most_common():
        lines.append(f"| {k} | {v} | {'yes' if k in HARD else 'no'} |")
    lines += ["", f"Hard-flagged records: {len(hard_ids)}" + (" (dropped)" if a.drop else ""), "",
              "## Verification", "", "| family / status / method | count |", "|---|---|"]
    for k, v in sorted(st["verify"].items()):
        lines.append(f"| {k} | {v} |")
    lines += ["", "## Fact-check of the originals (wiki_check)", "", "| status | count |", "|---|---|"]
    for k, v in sorted(st["wiki_check"].items()):
        lines.append(f"| {k} | {v} |")
    (PUBLISH / "QA_REPORT.md").write_text("\n".join(lines) + "\n", encoding="utf-8")
    print(json.dumps({"records": len(recs), "flags": fl, "hard": len(hard_ids), "kinds": st["kinds_total"],
                      "published": dict(kt)}, ensure_ascii=False))


if __name__ == "__main__":
    ap = argparse.ArgumentParser()
    ap.add_argument("--drop", action="store_true")
    main(ap.parse_args())