#!/usr/bin/env python
"""
Copyright (C) 2024 Mandiant, Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
You may obtain a copy of the License at: [package root]/LICENSE.txt
Unless required by applicable law or agreed to in writing, software distributed under the License
 is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and limitations under the License.

Extract files relevant to capa analysis from VMRay Analysis Archive and create a new ZIP file.
"""
import sys
import logging
import zipfile
import argparse
from pathlib import Path

from capa.features.extractors.vmray import DEFAULT_ARCHIVE_PASSWORD, VMRayAnalysis

logger = logging.getLogger(__name__)


def main(argv=None):
    if argv is None:
        argv = sys.argv[1:]

    parser = argparse.ArgumentParser(
        description="Minimize VMRay Analysis Archive to ZIP file only containing relevant files"
    )
    parser.add_argument(
        "analysis_archive",
        type=Path,
        help="path to VMRay Analysis Archive downloaded from Dynamic Analysis Report page",
    )
    parser.add_argument(
        "-p", "--password", type=str, default="infected", help="password used to unzip and zip protected archives"
    )
    args = parser.parse_args(args=argv)

    analysis_archive = args.analysis_archive

    vmra = VMRayAnalysis(analysis_archive)
    sv2_json = vmra.zipfile.read("logs/summary_v2.json", pwd=DEFAULT_ARCHIVE_PASSWORD)
    flog_xml = vmra.zipfile.read("logs/flog.xml", pwd=DEFAULT_ARCHIVE_PASSWORD)
    sample_file_buf = vmra.sample_file_buf
    assert vmra.sample_file_analysis is not None
    sample_sha256: str = vmra.sample_file_analysis.hash_values.sha256.lower()

    new_zip_name = f"{analysis_archive.parent / analysis_archive.stem}_min.zip"
    with zipfile.ZipFile(new_zip_name, "w") as new_zip:
        new_zip.writestr("logs/summary_v2.json", sv2_json)
        new_zip.writestr("logs/flog.xml", flog_xml)
        new_zip.writestr(f"internal/static_analyses/{sample_sha256}/objects/files/{sample_sha256}", sample_file_buf)
        new_zip.setpassword(args.password.encode("ascii"))

    # ensure capa loads the minimized archive
    assert isinstance(VMRayAnalysis(Path(new_zip_name)), VMRayAnalysis)

    print(f"Created minimized VMRay archive '{new_zip_name}' with password '{args.password}'.")


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