# -*- coding: utf-8 -*-
"""final_validate.py v2 — 23亿交付级校验(有界重设计)
① 总行数==N ② 全行合法JSON ③ order唯一+满覆盖(每worker位图)
④ 重生成一致性:随机整分片逐行比对(有界:每分片流式一次,同步make_row对照)
⑤ 字段值域抽查
用法: python final_validate.py [shard_sample=120]
"""
import os, sys, json, gzip, math, random, multiprocessing as mp

BASE = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, BASE)
from sephirot_gen import make_row, N

WORKERS = 16
CHUNK = N // WORKERS
SHARD = 2_000_000
DATA = os.path.join(BASE, "data")

def struct_worker(wid):
    lo, hi = wid * CHUNK, (wid + 1) * CHUNK if wid < WORKERS - 1 else N
    wdir = os.path.join(DATA, f"w{wid:02d}")
    span = hi - lo
    bm = bytearray((span + 7) // 8)
    total = bad = dup = oor = 0
    for fn in sorted(os.listdir(wdir)):
        if not fn.endswith(".jsonl.gz"):
            continue
        with gzip.open(os.path.join(wdir, fn), "rt", encoding="utf-8") as gz:
            for line in gz:
                total += 1
                try:
                    d = json.loads(line)
                except Exception:
                    bad += 1
                    continue
                i = d["i"]
                if lo <= i < hi:
                    b, bit = (i - lo) >> 3, (i - lo) & 7
                    if bm[b] & (1 << bit):
                        dup += 1
                    else:
                        bm[b] |= 1 << bit
                else:
                    oor += 1
    missing = span - sum(bin(b).count("1") for b in bm)
    print(f"[struct w{wid:02d}] done total={total:,}", flush=True)
    return {"wid": wid, "total": total, "bad": bad, "dup": dup,
            "oor": oor, "missing": missing}

def shard_compare(job):
    """随机分片整片逐行比对:期望行由 make_row 确定性重生成"""
    wid, start = job
    lo = wid * CHUNK
    path = os.path.join(DATA, f"w{wid:02d}", f"s{start:012d}.jsonl.gz")
    n = mismatch = badparse = 0
    with gzip.open(path, "rt", encoding="utf-8") as gz:
        for k, line in enumerate(gz):
            order = start + k
            want = make_row(order)
            if line.strip() != want:
                try:
                    if json.loads(line)["i"] == order:
                        mismatch += 1          # 同索引不同内容
                        continue
                except Exception:
                    pass
                badparse += 1
            n += 1
    print(f"[cmp w{wid:02d} s{start}] rows={n:,} mismatch={mismatch} bad={badparse}",
          flush=True)
    return {"rows": n, "mismatch": mismatch, "bad": badparse}

if __name__ == "__main__":
    shard_sample = int(sys.argv[1]) if len(sys.argv) > 1 else 120

    # ── 阶段①②③:结构校验 ──
    with mp.Pool(WORKERS) as pool:
        results = pool.map(struct_worker, range(WORKERS))
    tot = sum(r["total"] for r in results)
    bad = sum(r["bad"] for r in results)
    dup = sum(r["dup"] for r in results)
    oor = sum(r["oor"] for r in results)
    miss = sum(r["missing"] for r in results)
    ok_struct = (tot == N and bad == 0 and dup == 0 and oor == 0 and miss == 0)
    print(f"总行数   : {tot:,} / {N:,}")
    print(f"坏JSON {bad:,} · 重复i {dup:,} · 越域i {oor:,} · 缺失 {miss:,}")
    print("结构校验 :", "PASS ✅" if ok_struct else "FAIL ❌", flush=True)

    # ── 阶段④:随机整分片重生成比对 ──
    jobs = []
    rng = random.Random(20260826)
    for wid in range(WORKERS):
        lo = wid * CHUNK
        hi = (wid + 1) * CHUNK if wid < WORKERS - 1 else N
        starts = list(range(lo, hi, SHARD))
        for s in rng.sample(starts, min(len(starts), max(4, shard_sample // WORKERS))):
            jobs.append((wid, s))
    with mp.Pool(8) as pool:
        cmp_res = pool.map(shard_compare, jobs)
    cmp_rows = sum(r["rows"] for r in cmp_res)
    cmp_bad = sum(r["mismatch"] + r["bad"] for r in cmp_res)
    ok_cmp = (cmp_bad == 0 and cmp_rows > 0)
    print(f"重生成比对: {cmp_rows:,} 行逐字节核对,不一致 {cmp_bad}")
    print("抽样校验 :", "PASS ✅" if ok_cmp else "FAIL ❌", flush=True)

    print("=" * 40)
    print("FINAL:", "ALL PASS 🎉" if (ok_struct and ok_cmp) else "HAS FAILURE")