#!/usr/bin/env python3
"""Normalize Windows-style ZIP entries in a Mini Program build directory."""

from pathlib import Path
import os
import sys


def normalize(root: Path) -> int:
    moved = 0
    entries = sorted(root.rglob("*"), key=lambda path: len(path.parts), reverse=True)
    for entry in entries:
        if "\\" not in entry.name:
            continue
        target = entry.parent.joinpath(*entry.name.split("\\"))
        target.parent.mkdir(parents=True, exist_ok=True)
        if target.exists():
            raise FileExistsError(f"normalization target already exists: {target}")
        os.replace(entry, target)
        moved += 1
    return moved


if __name__ == "__main__":
    if len(sys.argv) != 2:
        raise SystemExit(f"usage: {Path(sys.argv[0]).name} BUILD_DIR")
    build_dir = Path(sys.argv[1])
    if not build_dir.is_dir():
        raise SystemExit(f"build directory not found: {build_dir}")
    print(f"normalized {normalize(build_dir)} Windows-style paths")