#!/usr/bin/env python3
"""clean_hplt_v3.py — filtr Polish HPLT v3 bin-10 (WDS=10) -> kanoniczna schema DynaWord.

Adaptacja src/filter_european_hplt.py maintainera do SUROWEGO formatu HPLT v3 (jsonl.zst,
pobrany z data.hplt-project.org). Te same progi jakosci; mapowanie pol v3 -> pol v1.
Output: kanoniczna 8-kolumnowa schema (id/text/source/added/created/token_count/license/author)
+ stats.json (format DynaWord + drop-reasons + register/MT/domain) + karta .md.

Pola v3: text, lang[list], prob[list], u(url), doc_scores[list], web-register{dict}, c(mime), id.
"""
from __future__ import annotations
import argparse, json, os, re, sys, time
from pathlib import Path
from urllib.parse import urlparse
import zstandard as zstd
import pyarrow as pa, pyarrow.parquet as pq
import tiktoken

ADDED = "2026-07-14"
SOURCE = "european_hplt_v3_pl"
LICENSE = "CC0-1.0"

BOILERPLATE_RE = re.compile(
    r"(cookies?|privacy policy|terms of service|all rights reserved|"
    r"polityka prywatno\u015bci|regulamin|wszelkie prawa zastrze\u017cone|"
    r"zaloguj|rejestracja|newsletter)", re.I)
ADULT_SPAM_RE = re.compile(
    r"(porn|sex|escort|casino|viagra|cialis|bukmacher|hazard|"
    r"porno|seks|erotycz|kasyno|randki)", re.I)
LEGALISH_RE = re.compile(
    r"\b(ustawa|rozporz\u0105dzenie|dz\.u\.|sejm|senat|parlament|eur-lex|"
    r"trybuna\u0142|s\u0105d|wyrok|kodeks|komisja europejska)\b", re.I)
EXCLUDED_DOMAIN_PARTS = {".bip.", "bip.", "docplayer.pl", "mapa-kodow-pocztowych.pl",
                         "slideplayer.pl", "wikipedia.org", "wikisource.org", "wikibooks.org",
                         "wikiquote.org", "wikivoyage.org", "chomikuj.pl", "scribd.com",
                         "pdfcoffee.com", "dokumen.pub", "docer.pl", "ebookpoint", "wolnelektury.pl"}
# mojibake: polskie znaki UTF-8 zdekodowane jako CJK/inne (upstream HPLT extraction bug)
MOJIBAKE_RE = re.compile(r"[\u2e00-\u9fff\uff00-\uffef\ufffd]")
# naglowki serwisow wymiany plikow / PDF-ripow (ryzyko piractwa)
PDFHOST_RE = re.compile(r"(\d+\s*Pages?\s*[\u2022\u00b7]|Uploaded at|\d+\s*Words?\s*[\u2022\u00b7])", re.I)
MAX_CHARS = 120000  # ~40k tok: powyzej to ksiazki (copyright/OCR-risk), nie strony web
ALLOWED_REGISTERS = {"ID", "OP", "HI", "IN", "NA"}

CANON = pa.schema([("id", pa.string()), ("text", pa.string()), ("source", pa.string()),
                   ("added", pa.string()), ("created", pa.string()),
                   ("token_count", pa.int64()), ("license", pa.string()), ("author", pa.string())])

ENC = tiktoken.get_encoding("cl100k_base")

def domain(url):
    if not url:
        return ""
    h = urlparse(url).netloc.lower()
    return h[4:] if h.startswith("www.") else h

def top_register(reg):
    if not isinstance(reg, dict) or not reg:
        return "", 0.0
    k, v = max(reg.items(), key=lambda kv: kv[1] or 0.0)
    return str(k), float(v or 0.0)

def keep(o, min_chars, min_words, min_lang_prob, max_mt, dom_counts, max_per_domain):
    lang = o.get("lang")
    if not (isinstance(lang, list) and lang and lang[0] == "pol_Latn"):
        return None, "language"
    prob = o.get("prob")
    lp = float(prob[0]) if isinstance(prob, list) and prob else 0.0
    if lp < min_lang_prob:
        return None, "lang_prob"
    host = domain(o.get("u"))
    if any(p in host for p in EXCLUDED_DOMAIN_PARTS):
        return None, "domain"
    if max_per_domain and dom_counts.get(host, 0) >= max_per_domain:
        return None, "domain_cap"
    reg = o.get("web-register") or {}
    mt = float(reg.get("MT", 0.0)) if isinstance(reg, dict) else 0.0
    if mt >= max_mt:
        return None, "machine_translated"
    rtop, _ = top_register(reg)
    if ALLOWED_REGISTERS and rtop not in ALLOWED_REGISTERS:
        return None, "register"
    text = (o.get("text") or "").strip()
    if len(text) < min_chars:
        return None, "short"
    if len(text.split()) < min_words:
        return None, "few_words"
    if len(text) > MAX_CHARS:
        return None, "too_long"
    if PDFHOST_RE.search(text[:200]):
        return None, "filehost"
    if len(MOJIBAKE_RE.findall(text[:3000])) >= 3:
        return None, "mojibake"
    s = text[:5000]
    if len(BOILERPLATE_RE.findall(s)) >= 3:
        return None, "boilerplate"
    if ADULT_SPAM_RE.search(s):
        return None, "adult_spam"
    if LEGALISH_RE.search(s):
        return None, "legalish"
    return text, "kept"

def open_input(path):
    """Local file or URL (stream) -> binary readable context manager."""
    if str(path).startswith("http"):
        import urllib.request
        return urllib.request.urlopen(urllib.request.Request(path, headers={"User-Agent": "slayer-dsbench/1.0"}), timeout=120)
    return open(path, "rb")

def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("--in", dest="inp", default=r"C:\ProjektyPublic\datasets\hplt_v3_pl\10_1.jsonl.zst")
    ap.add_argument("--out-dir", default=r"C:\ProjektyPublic\datasets\hplt_v3_pl\data\european_hplt_v3_pl")
    ap.add_argument("--source", default="european_hplt_v3_pl", help="wartosc kolumny source")
    ap.add_argument("--out-name", default="", help="basename plikow (domyslnie = source); id prefix")
    ap.add_argument("--bin-label", default="WDS=10")
    ap.add_argument("--min-chars", type=int, default=400)
    ap.add_argument("--min-words", type=int, default=80)
    ap.add_argument("--min-lang-prob", type=float, default=0.80)
    ap.add_argument("--max-mt-prob", type=float, default=0.20)
    ap.add_argument("--max-per-domain", type=int, default=250)
    ap.add_argument("--max-records", type=int, default=0)
    a = ap.parse_args()
    src = a.source; out = a.out_name or a.source
    outd = Path(a.out_dir); outd.mkdir(parents=True, exist_ok=True)
    t0 = time.time()

    drops = {}; regs = {}; doms = {}; dom_counts = {}
    ids, texts, tokens = [], [], []
    read = kept = chars = toks = 0
    mt_sum = 0.0
    writer = pq.ParquetWriter(outd / f"{out}.parquet", CANON, compression="zstd")

    def flush():
        nonlocal ids, texts, tokens
        if not ids:
            return
        n = len(ids)
        writer.write_table(pa.table({
            "id": ids, "text": texts, "source": [src]*n, "added": [ADDED]*n,
            "created": [""]*n, "token_count": tokens, "license": [LICENSE]*n, "author": [""]*n},
            schema=CANON))
        ids, texts, tokens = [], [], []

    with open_input(a.inp) as fh:
        reader = zstd.ZstdDecompressor().stream_reader(fh)
        buf = b""
        while True:
            chunk = reader.read(1 << 20)
            if not chunk:
                break
            buf += chunk
            while b"\n" in buf:
                line, buf = buf.split(b"\n", 1)
                if not line.strip():
                    continue
                try:
                    o = json.loads(line)
                except Exception:
                    continue
                read += 1
                text, reason = keep(o, a.min_chars, a.min_words, a.min_lang_prob,
                                    a.max_mt_prob, dom_counts, a.max_per_domain)
                if text is None:
                    drops[reason] = drops.get(reason, 0) + 1
                    continue
                host = domain(o.get("u")); dom_counts[host] = dom_counts.get(host, 0) + 1
                if len(doms) < 500:
                    doms[host] = doms.get(host, 0) + 1
                reg = o.get("web-register") or {}
                rtop, _ = top_register(reg); regs[rtop] = regs.get(rtop, 0) + 1
                mt_sum += float(reg.get("MT", 0.0)) if isinstance(reg, dict) else 0.0
                tk = len(ENC.encode(text, disallowed_special=()))
                ids.append(f"{out}_{kept}"); texts.append(text); tokens.append(tk)
                kept += 1; chars += len(text); toks += tk
                if len(ids) >= 1000:
                    flush()
                if read % 20000 == 0:
                    print(f"  read={read:,} kept={kept:,} tok={toks:,} ({time.time()-t0:.0f}s)", flush=True)
                if a.max_records and kept >= a.max_records:
                    buf = b""; break
            else:
                continue
            break
    flush(); writer.close()

    stats = {"read": read, "kept": kept, "drop_short": drops.get("short", 0),
             "drop_lang": drops.get("language", 0) + drops.get("lang_prob", 0),
             "drop_dup": 0, "drop_ocr": 0, "chars": chars, "tokens": toks,
             "licenses": {LICENSE: kept}, "authors_with_value": 0, "license": LICENSE,
             "stats_recomputed_from_parquet": True,
             "drop_detail": drops, "registers": regs,
             "mt_prob_mean_kept": round(mt_sum / max(1, kept), 3),
             "domains_top_sample": dict(sorted(doms.items(), key=lambda x: -x[1])[:30]),
             "secs": round(time.time()-t0, 1),
             "source_repo": f"HPLT/HPLT3.0 pol_Latn {a.bin_label} via {a.inp}"}
    (outd / f"{out}.stats.json").write_text(json.dumps(stats, ensure_ascii=False, indent=2)+"\n", encoding="utf-8")
    print("=== STATS ===")
    print(json.dumps({k: v for k, v in stats.items() if k not in ("domains_top_sample",)}, ensure_ascii=False, indent=2))
    print(f"parquet={outd/(out+'.parquet')} ({os.path.getsize(outd/(out+'.parquet')):,}B)")

if __name__ == "__main__":
    main()