from __future__ import annotations
import argparse, shutil, subprocess, tarfile, time
from pathlib import Path
import sys
ROOT=Path(__file__).resolve().parents[1]
sys.path.insert(0,str(ROOT))
from sourcehub.config import Settings

parser=argparse.ArgumentParser()
parser.add_argument("--out",default="backups")
args=parser.parse_args()
settings=Settings.from_env()
out=Path(args.out);out.mkdir(parents=True,exist_ok=True)
stamp=time.strftime("%Y%m%d-%H%M%S")

if settings.database_kind=="sqlite":
    db=Path(settings.database_url.replace("sqlite:///","",1))
    shutil.copy2(db,out/f"sourcehub-{stamp}.db")
elif settings.database_kind=="postgresql":
    target=out/f"sourcehub-{stamp}.dump"
    subprocess.run(["pg_dump","--format=custom","--file",str(target),settings.database_url],check=True)
else:
    raise SystemExit("지원하지 않는 DB backend")

if settings.storage_backend=="local":
    tar_path=out/f"sourcehub-storage-{stamp}.tar.gz"
    with tarfile.open(tar_path,"w:gz") as tar:
        tar.add(settings.local_storage_dir,arcname="storage")
    print(tar_path)
else:
    print("MinIO object backup은 bucket versioning/replication 또는 mc mirror 정책으로 운영하세요.")
print("backup complete",stamp)