"""Push CERNenv artefacts to the Hugging Face Hub.

Two subcommands:

* ``model`` — push trained LoRA adapters (output of ``training_unsloth.py``)
  to a model repo. Generates a model card describing the run.

* ``space`` — push a directory as a Hugging Face Space
  (e.g. ``space/training`` for the trainer Space, or the project root
  to publish the env Space). Front-matter is taken from the README.md
  inside the directory.

Usage:
    python -m scripts.push_to_hub model \\
        --adapter_dir runs/unsloth-grpo \\
        --repo_id YOUR_HF_USERNAME/cernenv-grpo-qwen2.5-3b \\
        --base_model unsloth/Qwen2.5-3B-Instruct

    python -m scripts.push_to_hub space \\
        --space_dir space/training \\
        --repo_id YOUR_HF_USERNAME/cernenv-trainer \\
        --hardware a100-large

    python -m scripts.push_to_hub space \\
        --space_dir . \\
        --repo_id YOUR_HF_USERNAME/cernenv \\
        --include "models.py" "server/**" "openenv.yaml" "pyproject.toml" "client.py" "README.md"
"""

from __future__ import annotations

import argparse
import logging
import os
import sys
from pathlib import Path
from typing import Iterable, List, Optional


logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(message)s")
logger = logging.getLogger(__name__)


DEFAULT_SPACE_EXCLUDES: List[str] = [
    ".venv/**",
    "__pycache__/**",
    "**/__pycache__/**",
    "*.pyc",
    ".cursor/**",
    ".git/**",
    ".DS_Store",
    "**/.DS_Store",
    "runs/**",
    "training/runs/**",
    "training/plots/**",
    "wandb/**",
    "*.zip",
    "*.apk",
    "*.png",
    "*.jpg",
    "*.jpeg",
    "[External]*.txt",
    "Hackathon FAQs*.txt",
    "*.log",
]


def _hf_login() -> None:
    from huggingface_hub import login

    token = os.environ.get("HF_TOKEN")
    if not token:
        raise SystemExit(
            "HF_TOKEN environment variable is required (write-scoped Hugging Face token)."
        )
    login(token=token)


def _model_card(*, repo_id: str, base_model: str, run_dir: Path) -> str:
    return f"""---
license: bsd-3-clause
library_name: peft
base_model: {base_model}
tags:
  - cernenv
  - openenv
  - reinforcement-learning
  - grpo
  - unsloth
  - lora
  - particle-physics
---

# {repo_id}

LoRA (Low-Rank Adaptation) adapters trained with **GRPO** (Group-Relative
Policy Optimization) inside the **CERNenv** OpenEnv environment — an
LHC (Large Hadron Collider) particle-discovery POMDP (Partially Observable
Markov Decision Process).

The agent (this model) plays the role of a high-energy physicist running an
analysis: it configures the beam, allocates luminosity, picks decay
channels and triggers, reconstructs events, fits resonances, estimates
significance, and finally submits a structured discovery claim that is
graded against a hidden ground-truth particle.

* Base model: `{base_model}`
* RL framework: TRL (Transformer Reinforcement Learning) GRPO
* Acceleration: Unsloth + 4-bit + LoRA
* Environment: [CERNenv](https://huggingface.co/spaces/{repo_id.split('/')[0]}/cernenv)

## Usage

```python
from peft import PeftModel
from transformers import AutoModelForCausalLM, AutoTokenizer

base = "{base_model}"
adapter = "{repo_id}"

tokenizer = AutoTokenizer.from_pretrained(base)
model = AutoModelForCausalLM.from_pretrained(base, device_map="auto")
model = PeftModel.from_pretrained(model, adapter)
```

See the CERNenv repo for full evaluation, plots, and the `LLMAgent` wrapper.
"""


def push_model(
    *,
    adapter_dir: str,
    repo_id: str,
    base_model: str,
    private: bool,
) -> None:
    from huggingface_hub import HfApi, create_repo

    _hf_login()
    api = HfApi()

    run_dir = Path(adapter_dir)
    if not run_dir.exists():
        raise SystemExit(f"adapter_dir not found: {run_dir}")

    create_repo(repo_id=repo_id, repo_type="model", private=private, exist_ok=True)

    card_path = run_dir / "README.md"
    card_path.write_text(_model_card(repo_id=repo_id, base_model=base_model, run_dir=run_dir))

    logger.info("uploading %s → %s", run_dir, repo_id)
    api.upload_folder(
        folder_path=str(run_dir),
        repo_id=repo_id,
        repo_type="model",
        commit_message="Upload CERNenv GRPO LoRA adapters",
    )
    logger.info("done: https://huggingface.co/%s", repo_id)


def push_space(
    *,
    space_dir: str,
    repo_id: str,
    hardware: Optional[str],
    private: bool,
    include: Optional[List[str]],
    exclude: Optional[List[str]],
) -> None:
    from huggingface_hub import HfApi, create_repo

    _hf_login()
    api = HfApi()

    src = Path(space_dir).resolve()
    if not src.exists():
        raise SystemExit(f"space_dir not found: {src}")

    create_repo(
        repo_id=repo_id,
        repo_type="space",
        space_sdk="docker",
        space_hardware=hardware,
        private=private,
        exist_ok=True,
    )

    effective_exclude = list(DEFAULT_SPACE_EXCLUDES)
    if exclude:
        effective_exclude.extend(exclude)

    logger.info("uploading %s → space:%s", src, repo_id)
    logger.info("ignore patterns: %s", effective_exclude)
    api.upload_folder(
        folder_path=str(src),
        repo_id=repo_id,
        repo_type="space",
        commit_message="Update CERNenv Space",
        allow_patterns=include,
        ignore_patterns=effective_exclude,
    )
    logger.info("done: https://huggingface.co/spaces/%s", repo_id)


def main() -> None:  # pragma: no cover
    parser = argparse.ArgumentParser()
    sub = parser.add_subparsers(dest="cmd", required=True)

    m = sub.add_parser("model", help="push trained LoRA adapters to the Hub")
    m.add_argument("--adapter_dir", required=True)
    m.add_argument("--repo_id", required=True)
    m.add_argument("--base_model", required=True)
    m.add_argument("--private", action="store_true")

    s = sub.add_parser("space", help="push a directory as an HF Space")
    s.add_argument("--space_dir", required=True)
    s.add_argument("--repo_id", required=True)
    s.add_argument("--hardware", default=None,
                   help="e.g. a100-large, t4-small, l4-medium")
    s.add_argument("--private", action="store_true")
    s.add_argument("--include", nargs="*", default=None,
                   help="glob patterns to include")
    s.add_argument("--exclude", nargs="*", default=None,
                   help="glob patterns to exclude")

    args = parser.parse_args()

    if args.cmd == "model":
        push_model(
            adapter_dir=args.adapter_dir,
            repo_id=args.repo_id,
            base_model=args.base_model,
            private=args.private,
        )
    elif args.cmd == "space":
        push_space(
            space_dir=args.space_dir,
            repo_id=args.repo_id,
            hardware=args.hardware,
            private=args.private,
            include=args.include,
            exclude=args.exclude,
        )


if __name__ == "__main__":  # pragma: no cover
    main()