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#!/usr/bin/env python3
"""Package the currently active PolyGuard model artifacts for implementation use."""

from __future__ import annotations

import argparse
from datetime import datetime, timezone
import json
import os
from pathlib import Path
import shutil
import zipfile
from typing import Any

from huggingface_hub import HfApi


ROOT = Path(__file__).resolve().parents[1]
DEFAULT_BUNDLE_NAME = "local-qwen-0-5b-active-smoke"
DEFAULT_ARTIFACT_REPO = "TheJackBright/polyguard-openenv-training-full-artifacts"


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(description="Package active PolyGuard model artifacts.")
    parser.add_argument("--bundle-name", default=DEFAULT_BUNDLE_NAME)
    parser.add_argument("--artifact-repo-id", default=DEFAULT_ARTIFACT_REPO)
    parser.add_argument("--output-root", default=str(ROOT / "submission_bundle" / "model_artifacts"))
    parser.add_argument("--upload", action="store_true")
    parser.add_argument("--no-merged", action="store_true", help="Skip the merged model directory.")
    parser.add_argument("--zip", action="store_true", default=True)
    return parser.parse_args()


def load_json(path: Path) -> dict[str, Any]:
    if not path.exists():
        return {}
    try:
        payload = json.loads(path.read_text(encoding="utf-8"))
    except json.JSONDecodeError:
        return {}
    return payload if isinstance(payload, dict) else {}


def copy_tree(source: Path, target: Path) -> dict[str, Any]:
    if not source.exists():
        return {"source": str(source), "target": str(target), "exists": False, "file_count": 0, "bytes": 0}
    shutil.copytree(source, target, dirs_exist_ok=True, symlinks=False)
    file_count = 0
    total_bytes = 0
    for path in target.rglob("*"):
        if path.is_file():
            file_count += 1
            total_bytes += path.stat().st_size
    return {
        "source": str(source),
        "target": str(target),
        "exists": True,
        "file_count": file_count,
        "bytes": total_bytes,
    }


def copy_file(source: Path, target: Path) -> dict[str, Any]:
    if not source.exists():
        return {"source": str(source), "target": str(target), "exists": False, "bytes": 0}
    target.parent.mkdir(parents=True, exist_ok=True)
    shutil.copy2(source, target)
    return {"source": str(source), "target": str(target), "exists": True, "bytes": target.stat().st_size}


def write_json(path: Path, payload: Any) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(json.dumps(payload, ensure_ascii=True, indent=2) + "\n", encoding="utf-8")


def write_readme(bundle_dir: Path, manifest: dict[str, Any]) -> None:
    bundle_dir.joinpath("README.md").write_text(
        "\n".join(
            [
                "# PolyGuard Active Model Artifact Bundle",
                "",
                f"Bundle: `{manifest['bundle_name']}`",
                f"Model: `{manifest.get('model_id', '')}`",
                f"Base model: `{manifest.get('base_model', '')}`",
                f"Preferred artifact: `{manifest.get('preferred_artifact', '')}`",
                "",
                "This bundle is meant for implementation/testing while the full per-model remote sweep artifacts are still uploading.",
                "",
                "## Contents",
                "",
                "- `checkpoints/grpo_adapter/`",
                "- `checkpoints/sft_adapter/`",
                "- `checkpoints/merged/` when included",
                "- `manifests/active_model_manifest.json`",
                "- `reports/`",
                "",
                "## Restore Locally",
                "",
                "```bash",
                "cd /Users/daver/Desktop/Meta_Pytorch_OpenEnv_Scaler/polyguard-rl",
                "cp -R submission_bundle/model_artifacts/local-qwen-0-5b-active-smoke/checkpoints/grpo_adapter checkpoints/grpo_adapter",
                "cp -R submission_bundle/model_artifacts/local-qwen-0-5b-active-smoke/checkpoints/sft_adapter checkpoints/sft_adapter",
                "cp -R submission_bundle/model_artifacts/local-qwen-0-5b-active-smoke/checkpoints/merged checkpoints/merged",
                "mkdir -p checkpoints/active",
                "cp submission_bundle/model_artifacts/local-qwen-0-5b-active-smoke/manifests/active_model_manifest.json checkpoints/active/active_model_manifest.json",
                "curl http://127.0.0.1:8200/policy/model_status",
                "```",
                "",
                "## Hugging Face Download",
                "",
                "After upload, download with:",
                "",
                "```bash",
                "export HF_TOKEN=\"$(cat ~/.cache/huggingface/token)\"",
                "huggingface-cli download TheJackBright/polyguard-openenv-training-full-artifacts \\",
                "  --repo-type model \\",
                "  --include 'usable_model_bundles/local-qwen-0-5b-active-smoke/**' \\",
                "  --local-dir ./hf_artifacts",
                "```",
                "",
                "Note: this is the current local active Qwen 0.5B implementation bundle. It is not the final full remote Qwen 0.5B/1.5B sweep checkpoint until those files appear in the HF artifact repo.",
                "",
            ]
        ),
        encoding="utf-8",
    )


def zip_bundle(bundle_dir: Path) -> Path:
    zip_path = bundle_dir.with_suffix(".zip")
    if zip_path.exists():
        zip_path.unlink()
    with zipfile.ZipFile(zip_path, "w", compression=zipfile.ZIP_DEFLATED) as archive:
        for path in bundle_dir.rglob("*"):
            if path.is_file() and path.name != ".DS_Store":
                archive.write(path, arcname=str(path.relative_to(bundle_dir.parent)))
    return zip_path


def package_bundle(*, bundle_name: str, output_root: Path, include_merged: bool) -> dict[str, Any]:
    active_manifest = load_json(ROOT / "checkpoints" / "active" / "active_model_manifest.json")
    bundle_dir = output_root / bundle_name
    if bundle_dir.exists():
        shutil.rmtree(bundle_dir)
    bundle_dir.mkdir(parents=True, exist_ok=True)

    copies: dict[str, Any] = {
        "grpo_adapter": copy_tree(ROOT / "checkpoints" / "grpo_adapter", bundle_dir / "checkpoints" / "grpo_adapter"),
        "sft_adapter": copy_tree(ROOT / "checkpoints" / "sft_adapter", bundle_dir / "checkpoints" / "sft_adapter"),
        "active_manifest": copy_file(
            ROOT / "checkpoints" / "active" / "active_model_manifest.json",
            bundle_dir / "manifests" / "active_model_manifest.json",
        ),
        "active_report_manifest": copy_file(
            ROOT / "outputs" / "reports" / "active_model" / "active_model_manifest.json",
            bundle_dir / "manifests" / "active_model_report_manifest.json",
        ),
        "submission_evidence_manifest": copy_file(
            ROOT / "outputs" / "reports" / "submission_evidence" / "qwen_0_5b_1_5b" / "manifest.json",
            bundle_dir / "manifests" / "submission_evidence_manifest.json",
        ),
        "reports": copy_tree(ROOT / "outputs" / "reports" / "active_model", bundle_dir / "reports"),
    }
    if include_merged:
        copies["merged"] = copy_tree(ROOT / "checkpoints" / "merged", bundle_dir / "checkpoints" / "merged")

    manifest = {
        "status": "ok",
        "bundle_name": bundle_name,
        "created_at_utc": datetime.now(timezone.utc).isoformat(),
        "source": "local_active_model",
        "run_id": active_manifest.get("run_id", "qwen-qwen2-5-0-5b-instruct"),
        "label": active_manifest.get("label", "local-qwen-0.5b-active-smoke"),
        "model_id": active_manifest.get("model_id", "Qwen/Qwen2.5-0.5B-Instruct"),
        "base_model": active_manifest.get("base_model", "Qwen/Qwen2.5-0.5B-Instruct"),
        "preferred_artifact": active_manifest.get("preferred_artifact", "grpo_adapter"),
        "availability": active_manifest.get("availability", {}),
        "remote_full_sweep_note": (
            "The full Qwen 0.5B/1.5B remote sweep artifacts are still pending upload in the HF artifact repo. "
            "This bundle packages the currently active local trained/smoke artifacts for product integration."
        ),
        "copies": copies,
    }
    write_json(bundle_dir / "bundle_manifest.json", manifest)
    write_readme(bundle_dir, manifest)
    return manifest


def upload_bundle(bundle_dir: Path, repo_id: str, bundle_name: str) -> str:
    token = os.getenv("HF_TOKEN")
    api = HfApi(token=token)
    api.create_repo(repo_id=repo_id, repo_type="model", private=True, exist_ok=True)
    path_in_repo = f"usable_model_bundles/{bundle_name}"
    api.upload_folder(
        repo_id=repo_id,
        repo_type="model",
        folder_path=str(bundle_dir),
        path_in_repo=path_in_repo,
        commit_message=f"Upload PolyGuard usable model bundle: {bundle_name}",
        ignore_patterns=[".DS_Store", "**/.DS_Store"],
    )
    return path_in_repo


def main() -> None:
    args = parse_args()
    output_root = Path(args.output_root)
    manifest = package_bundle(bundle_name=args.bundle_name, output_root=output_root, include_merged=not args.no_merged)
    bundle_dir = output_root / args.bundle_name
    zip_path = zip_bundle(bundle_dir) if args.zip else None
    if zip_path:
        manifest["zip_path"] = str(zip_path)
    if args.upload:
        manifest["hf_repo_id"] = args.artifact_repo_id
        manifest["hf_path_in_repo"] = upload_bundle(bundle_dir, args.artifact_repo_id, args.bundle_name)
        manifest["hf_url"] = f"https://huggingface.co/{args.artifact_repo_id}/tree/main/{manifest['hf_path_in_repo']}"
    write_json(bundle_dir / "bundle_manifest.json", manifest)
    print(json.dumps(manifest, ensure_ascii=True, indent=2))


if __name__ == "__main__":
    main()