#!/usr/bin/env python3
"""Remove profile links and timestamps from the Lexilogia discussion shards.

    python3 strip_profiles_and_timestamps.py SOURCE_DIR OUTPUT_DIR

Removed, everywhere they occur at any depth:

    author_url, op_author_url    links to a member's profile page
    created_at, last_activity    when a post or thread happened
    extracted_at, ts             when the record was collected

Everything else is kept as collected. Handles stay as written: these are public
threads, and stripping the names people post under would break the one thing the
corpus is for — following who is answering whom.
"""
import gzip
import json
import sys
from pathlib import Path

REMOVE = {
    "author_url", "op_author_url",
    "created_at", "last_activity", "extracted_at", "ts",
}


def strip(node):
    if isinstance(node, list):
        return [strip(v) for v in node]
    if isinstance(node, dict):
        return {k: strip(v) for k, v in node.items() if k not in REMOVE}
    return node


def main():
    src, dst = Path(sys.argv[1]), Path(sys.argv[2])
    dst.mkdir(parents=True, exist_ok=True)
    total = 0
    for path in sorted(src.glob("*.jsonl.gz")):
        n = 0
        with gzip.open(path, "rt", encoding="utf-8") as fin, \
             gzip.open(dst / path.name, "wt", encoding="utf-8") as fout:
            for line in fin:
                fout.write(json.dumps(strip(json.loads(line)), ensure_ascii=False) + "\n")
                n += 1
        print(f"  {path.name}: {n} discussions")
        total += n
    print(f"{total} discussions written to {dst}")


if __name__ == "__main__":
    main()