"""Dedup harvested forms, assign host-level splits, and build prioritized teacher-labeling chunks.

Usage: python select.py OUT_DIR PATTERN [PATTERN ...] [--labeled DIR ...]
Signatures already labeled in a previous round (DIR/queue-*.jsonl + DIR/labels-*.jsonl) are not queued again.
Writes OUT_DIR/queue-NNN.jsonl (teacher input, 10k rows each, interleaved priorities),
OUT_DIR/reps.jsonl.gz (one representative per signature, with split), OUT_DIR/select_stats.json.
"""
import gzip
import hashlib
import json
import os
import random
import sys
from collections import Counter

sys.path.insert(0, "/job/work")
from label.common import load_forms  # noqa: E402

SEARCHY = {"q", "s", "search", "query", "keyword", "keywords", "search query", "k", "term", "search term"}
MIX = [(0, 0.40), (1, 0.25), (2, 0.17), (3, 0.12), (4, 0.06)]
CAPS = {3: 60000, 4: 20000}


def split_of(host):
    h = int(hashlib.md5(host.encode()).hexdigest()[:8], 16) % 100
    return "test" if h < 4 else ("val" if h < 6 else "train")


def prio(r):
    fs = r["fields"]
    types = [f["type"] for f in fs]
    if "input password" in types:
        return 0
    if len(fs) >= 3:
        return 1
    if len(fs) == 2 or any(t in ("input email", "input tel") for t in types):
        return 2
    f = fs[0]
    if f["type"] == "input search" or f["name"] in SEARCHY or f["id"] in SEARCHY:
        return 4
    return 3


def labeled_sigs(dirs):
    import glob
    out = {}
    for d in dirs:
        uid2sig = {}
        for q in glob.glob(os.path.join(d, "queue-*.jsonl")):
            for line in open(q):
                j = json.loads(line)
                uid2sig[j["uid"]] = j["sig"]
        for lf in glob.glob(os.path.join(d, "labels-*.jsonl")):
            for line in open(lf):
                try:
                    j = json.loads(line)
                except json.JSONDecodeError:  # partial last line of an interrupted run
                    continue
                if j.get("form") and j.get("fields") and j["uid"] in uid2sig:
                    out[uid2sig[j["uid"]]] = j
    return out


def main(out_dir, patterns, labeled_dirs=()):
    os.makedirs(out_dir, exist_ok=True)
    done = labeled_sigs(labeled_dirs)
    print(f"{len(done)} signatures already labeled", flush=True)
    reps, copies, seen = {}, Counter(), set()
    n = 0
    for pat in patterns:
        for r in load_forms(pat):
            n += 1
            if r["uid"] in seen:
                continue
            seen.add(r["uid"])
            copies[r["sig"]] += 1
            cur = reps.get(r["sig"])
            if cur is None or (not cur.get("html") and r.get("html")):
                reps[r["sig"]] = r
    print(f"{n} rows, {len(seen)} unique uids, {len(reps)} unique signatures", flush=True)
    rng = random.Random(13)
    pools = {p: [] for p, _ in MIX}
    with gzip.open(os.path.join(out_dir, "reps.jsonl.gz"), "wt") as g:
        for sig, r in reps.items():
            r["split"] = split_of(r["host"])
            r["copies"] = copies[sig]
            r["prio"] = prio(r)
            g.write(json.dumps(r, ensure_ascii=False) + "\n")
            if r.get("html") and sig not in done:
                pools[r["prio"]].append(r)
    for p in pools:
        rng.shuffle(pools[p])
        if p in CAPS:
            pools[p] = pools[p][:CAPS[p]]
    stats = {"rows": n, "uids": len(seen), "sigs": len(reps), "pools": {p: len(v) for p, v in pools.items()},
             "splits": Counter(split_of(r["host"]) for r in reps.values())}
    print(stats, flush=True)
    order, idx = [], {p: 0 for p in pools}
    while any(idx[p] < len(pools[p]) for p in pools):
        x, acc = rng.random(), 0.0
        live = [(p, w) for p, w in MIX if idx[p] < len(pools[p])]
        tot = sum(w for _, w in live)
        for p, w in live:
            acc += w / tot
            if x <= acc:
                order.append(pools[p][idx[p]])
                idx[p] += 1
                break
    keep = ("uid", "url", "host", "ctx", "fields", "html", "sig", "split", "prio")
    for c in range(0, len(order), 10000):
        with open(os.path.join(out_dir, f"queue-{c // 10000:03d}.jsonl"), "w") as f:
            for r in order[c:c + 10000]:
                f.write(json.dumps({k: r[k] for k in keep}, ensure_ascii=False) + "\n")
    stats["queued"] = len(order)
    json.dump(stats, open(os.path.join(out_dir, "select_stats.json"), "w"), indent=1)
    print("queued", len(order), flush=True)


if __name__ == "__main__":
    import argparse
    ap = argparse.ArgumentParser()
    ap.add_argument("out")
    ap.add_argument("patterns", nargs="+")
    ap.add_argument("--labeled", action="append", default=[])
    a = ap.parse_args()
    main(a.out, a.patterns, a.labeled)