"""Upload a trained Objectverse Diary LoRA adapter folder to Hugging Face Hub."""

from __future__ import annotations

import argparse
import json
from pathlib import Path
from typing import Any


REQUIRED_ADAPTER_FILES = ("adapter_config.json",)
ADAPTER_WEIGHT_FILES = ("adapter_model.safetensors", "adapter_model.bin")


def validate_adapter_dir(adapter_dir: Path) -> dict[str, object]:
    if not adapter_dir.exists() or not adapter_dir.is_dir():
        raise FileNotFoundError(f"Adapter directory does not exist: {adapter_dir}")

    missing = [name for name in REQUIRED_ADAPTER_FILES if not (adapter_dir / name).exists()]
    has_weights = any((adapter_dir / name).exists() for name in ADAPTER_WEIGHT_FILES)
    if not has_weights:
        missing.append("adapter_model.safetensors or adapter_model.bin")
    if missing:
        raise ValueError(f"Adapter directory is missing required files: {', '.join(missing)}")

    files = sorted(path.name for path in adapter_dir.iterdir() if path.is_file())
    return {
        "adapter_dir": str(adapter_dir),
        "files": files,
        "file_count": len(files),
    }


def upload_adapter(
    *,
    adapter_dir: Path,
    repo_id: str,
    private: bool,
    commit_message: str,
    dry_run: bool,
) -> dict[str, object]:
    summary = validate_adapter_dir(adapter_dir)
    summary.update(
        {
            "repo_id": repo_id,
            "private": private,
            "commit_message": commit_message,
            "dry_run": dry_run,
        }
    )
    if dry_run:
        summary["uploaded"] = False
        return summary

    from huggingface_hub import HfApi

    api = HfApi()
    api.create_repo(repo_id=repo_id, repo_type="model", private=private, exist_ok=True)
    api.upload_folder(
        folder_path=str(adapter_dir),
        repo_id=repo_id,
        repo_type="model",
        commit_message=commit_message,
    )
    summary["uploaded"] = True
    summary["url"] = f"https://huggingface.co/{repo_id}"
    return summary


def _print_json(payload: dict[str, Any]) -> None:
    print(json.dumps(payload, indent=2, sort_keys=True), flush=True)


def _parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--adapter-dir", type=Path, required=True)
    parser.add_argument("--repo-id", required=True)
    parser.add_argument("--private", action="store_true")
    parser.add_argument(
        "--commit-message",
        default="Upload Objectverse Diary LoRA adapter",
    )
    parser.add_argument("--dry-run", action="store_true")
    return parser.parse_args()


def main() -> None:
    args = _parse_args()
    _print_json(
        upload_adapter(
            adapter_dir=args.adapter_dir,
            repo_id=args.repo_id,
            private=args.private,
            commit_message=args.commit_message,
            dry_run=args.dry_run,
        )
    )


if __name__ == "__main__":
    try:
        main()
    except Exception as exc:
        raise SystemExit(str(exc)) from exc