#!/usr/bin/env python3
from contextlib import contextmanager
import json
import logging
import os
import sys
import tarfile

extension_name = "aum"
current_dir = os.path.dirname(__file__)
archive_root = os.path.join(current_dir, "..", "archive")
src_root = os.path.join(current_dir, "..", "src")
common_file = "FujirouCommon.php"
info_file = "INFO"


def tar_reset(tarinfo):
    tarinfo.uid = tarinfo.gid = 99
    tarinfo.uname = tarinfo.gname = "nobody"
    return tarinfo


def do_tar(info_path):
    module_dir = os.path.dirname(info_path)

    if not os.path.exists(info_path):
        logging.error("INFO file does not exists. {}".format(info_path))
        return False

    text = open(info_path, "rb").read()
    obj = json.loads(text)

    # key exists check
    if "module" not in obj or "version" not in obj:
        return False

    module_name = obj["name"]
    module_file = obj["module"]
    module_path = os.path.join(module_dir, module_file)

    module_version = obj["version"]
    common_path = os.path.join(module_dir, common_file)
    archive_file = "%s-%s.%s" % (module_name, module_version, extension_name)
    archive_path = os.path.abspath(os.path.join(archive_root, archive_file))

    with tarfile.open(archive_path, "w:gz") as tar:
        tar.add(module_path, arcname=module_file, filter=tar_reset)
        tar.add(info_path, arcname=info_file, filter=tar_reset)
        tar.add(common_path, arcname=common_file, filter=tar_reset)

        print("create archive {}".format(archive_path))
        print("including:")
        print("\t{} - {}".format(module_file, module_path))
        print("\t{} - {}".format(info_file, info_path))
        print("\t{} - {}".format(common_file, common_path))


def print_usage():
    print("%s [module json path]\n" % (os.path.basename(__file__)))

    sys.exit(0)


if __name__ == "__main__":
    argv = sys.argv

    if len(argv) < 2:
        print_usage()
        sys.exit(-1)

    json_path = argv[1]
    if not os.path.exists(json_path):
        print("path {} not exists".format(json_path))
        sys.exit(-1)

    do_tar(os.path.abspath(json_path))