"""Decompress Facade's zlib-packed rule files into vendor/rules/ for reading.

    python tools/extract_rules.py [facade-install-folder]

vendor/ is gitignored: these are the game's files, not ours to redistribute.
Read them with tools/show_rules.py.
"""
import sys
import zlib

from facade_install import REPO, from_args

OUT = REPO / "vendor" / "rules"
SUFFIXES = {".rul", ".map", ".bin"}


def main():
    sources = from_args(sys.argv).sources
    done, skipped = 0, []
    for path in sorted(sources.rglob("*")):
        if path.suffix.lower() not in SUFFIXES or not path.is_file():
            continue
        try:
            text = zlib.decompress(path.read_bytes())
        except zlib.error:
            skipped.append(path.name)
            continue
        target = OUT / path.relative_to(sources)
        target = target.with_name(target.name + ".txt")
        target.parent.mkdir(parents=True, exist_ok=True)
        target.write_bytes(text)
        done += 1
    print("decompressed %d files into %s" % (done, OUT))
    if skipped:
        print("not zlib, skipped: %s" % ", ".join(skipped))


if __name__ == "__main__":
    main()