"""One-shot push: stage the Space layout in a tempdir and upload it to
`EngEmmanuel/EchoLVFM` (private by default).

The Space repo mirrors the local layout — `space/`, `utils/`, `vae/`, `src/`
sit as siblings at the Space root, with `space/README.md` and
`space/requirements.txt` promoted to root so HF picks them up. The README's
frontmatter declares `app_file: space/app.py`, so the Space launcher finds
the entrypoint inside the `space/` package — and `space/app.py`'s existing
`sys.path` shim makes `from space import ...` and `from utils.hub import ...`
resolve identically locally and on the Space.
"""
from __future__ import annotations

import argparse
import shutil
import subprocess
import sys
import tempfile
from pathlib import Path


REPO_ROOT = Path(__file__).resolve().parents[2]
DEFAULT_REPO_ID = "EngEmmanuel/EchoLVFM"

# Folders copied verbatim into the Space upload, preserving their layout.
DEPS = ["space", "utils", "vae", "src"]

# Stale paths from the previous (flat) push that need wiping before the
# mirrored structure lands. `hf repos delete-files` takes literal paths
# and shallow `*` globs (no `**` recursion), so list each subdir's known
# files explicitly to be sure the wipe lands.
STALE_PATTERNS = [
    "app.py", "assets.py", "inference.py", "metrics.py", "video_io.py",
    "samples/*", "samples/*/*",
    "assets/*",
    "scripts/build_samples.py", "scripts/sync_to_hub.py",
]


def _parse_args() -> argparse.Namespace:
    p = argparse.ArgumentParser(description=__doc__)
    p.add_argument("--repo-id", default=DEFAULT_REPO_ID)
    p.add_argument("--public", action="store_true",
                   help="Create the Space as public (default: private).")
    return p.parse_args()


def _stage(tmp: Path) -> None:
    """Materialise the Space-shaped tree under `tmp/`."""
    ignore = shutil.ignore_patterns("__pycache__", "*.pyc", "*.pyo")
    for name in DEPS:
        shutil.copytree(REPO_ROOT / name, tmp / name, ignore=ignore)
    # Promote the Space README + requirements to the upload root so HF picks
    # them up; the originals live under `space/` for editing convenience.
    shutil.move(str(tmp / "space" / "README.md"), str(tmp / "README.md"))
    shutil.move(str(tmp / "space" / "requirements.txt"),
                str(tmp / "requirements.txt"))


def main() -> int:
    args = _parse_args()

    create_cmd = [
        "hf", "repos", "create", args.repo_id,
        "--type", "space", "--space-sdk", "gradio", "--exist-ok",
    ]
    if not args.public:
        create_cmd.append("--private")
    print("$", " ".join(create_cmd))
    rc = subprocess.call(create_cmd)
    if rc != 0:
        return rc

    # Wipe the stale flat-file root from a prior push. Best-effort —
    # `delete-files` returns non-zero when patterns match nothing, which
    # is fine on a fresh repo.
    delete_cmd = [
        "hf", "repos", "delete-files", args.repo_id, *STALE_PATTERNS,
        "--type", "space",
        "--commit-message", "Drop stale flat-file root before mirrored push",
    ]
    print("$", " ".join(delete_cmd))
    subprocess.call(delete_cmd)

    with tempfile.TemporaryDirectory(prefix="echolvfm_space_") as td:
        tmp = Path(td)
        _stage(tmp)

        upload_cmd = [
            "hf", "upload", args.repo_id, str(tmp), ".",
            "--type", "space",
            "--commit-message",
            "Sync EchoLVFM Space (mirrored layout: space/, utils/, vae/, src/)",
        ]
        print("$", " ".join(upload_cmd))
        return subprocess.call(upload_cmd)


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