#!/usr/bin/env python3
"""Extract the unchanged original main research archive into a fresh folder."""
from __future__ import annotations
import argparse
from pathlib import Path, PurePosixPath
import stat
import sys
import zipfile

from verify_release import verify


def main():
    root = Path(__file__).resolve().parents[1]
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument('--output', type=Path, default=root / 'work')
    args = parser.parse_args()
    try:
        verify(root)
        output = args.output.resolve()
        if output.exists():
            raise ValueError('Output must be a fresh, nonexistent directory')
        archive = root / 'archives/Eidrion_v1.0.0_Research_Package.zip'
        with zipfile.ZipFile(archive) as z:
            for item in z.infolist():
                p = PurePosixPath(item.filename)
                if (p.is_absolute() or '..' in p.parts or '\\' in item.filename or ':' in item.filename
                        or not p.parts or p.parts[0] != 'Eidrion_v1.0.0'
                        or stat.S_ISLNK(item.external_attr >> 16)):
                    raise ValueError(f'Unsafe archive member: {item.filename}')
            output.mkdir(parents=True)
            z.extractall(output)
        print(f'Extracted main research package: {output / "Eidrion_v1.0.0"}')
        print('The four large raw-evidence companions are not included.')
        return 0
    except (OSError, ValueError, zipfile.BadZipFile) as exc:
        print(f'Extraction failed: {exc}', file=sys.stderr)
        return 1


if __name__ == '__main__':
    sys.exit(main())