import gzip
import json
from concurrent.futures import ProcessPoolExecutor

MONTHS = ["01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"]

def filter_month(month: str):
    with gzip.open(f"all/2022-{month}.jsonl.gz", "rb") as f:
        with gzip.open(f"rapid-classical-correspondence/2022-{month}.jsonl.gz", "wb") as fo:
            for i, line in enumerate(f):
                d = json.loads(line)
                s = d["event"]
                if "Rapid" in s or "Classical" in s or "Correspondence" in s:
                    fo.write((json.dumps(d) + '\n').encode())
    return 0

ppe = ProcessPoolExecutor(12)
for _ in ppe.map(filter_month, MONTHS):
    ...

ppe.shutdown()
print("Done!")