"""Bootstrap and atomic same-revision publication through Hugging Face Hub."""

from __future__ import annotations

import logging
import os
from pathlib import Path

logger = logging.getLogger(__name__)


def publish_to_hf(*, project_root: Path, repo_id: str, token: str | None = None) -> str:
    try:
        from huggingface_hub import HfApi
    except ImportError as error:  # pragma: no cover - exercised in publish environment
        raise RuntimeError("install the 'publish' extra to publish to Hugging Face") from error

    api = HfApi(token=token)
    api.create_repo(repo_id=repo_id, repo_type="dataset", exist_ok=True)
    local = {
        str(path.relative_to(project_root))
        for path in project_root.glob("data/**/*.parquet")
    }
    commit = api.upload_folder(
        repo_id=repo_id,
        repo_type="dataset",
        folder_path=project_root,
        # Without this, an upload only ever adds. A rebuild that drops a
        # quarantined release would leave its rows behind in the published
        # tree, and the dataset would then disagree with its own recipe.
        delete_patterns=["data/**"],
        allow_patterns=[
            "data/**",
            "recipe/**",
            "config/**",
            "metadata/**",
            "tests/**",
            "jobs/**",
            "README.md",
            "PIPELINE.md",
            "manifest.json",
            "quality_report.json",
            "pyproject.toml",
            "LICENSE",
            "NOTICE",
        ],
        # The downloaded documents are a local cache. Every one of them is
        # reproducible from the URL and the digest recorded beside the row it
        # produced, so publishing them would be publishing the Board's website.
        ignore_patterns=["**/__pycache__/**", "**/*.pyc", ".cache/**"],
        commit_message="Update the FOMC events dataset",
    )
    published = {
        sibling.rfilename
        for sibling in api.dataset_info(repo_id).siblings
        if sibling.rfilename.startswith("data/") and sibling.rfilename.endswith(".parquet")
    }
    stale, missing = published - local, local - published
    if stale or missing:
        raise RuntimeError(
            f"published tree does not match the local one: {len(stale)} stale file(s) "
            f"left behind, {len(missing)} missing. Examples: "
            f"stale={sorted(stale)[:3]} missing={sorted(missing)[:3]}"
        )
    logger.info("published tree mirrors %d local data files", len(local))
    return str(commit.oid)


def hf_token() -> str | None:
    """The token to act with: the environment first, then a stored login."""

    token = os.environ.get("HF_TOKEN")
    if token:
        return token
    try:
        from huggingface_hub import get_token
    except ImportError:  # pragma: no cover - exercised in the publish environment
        return None
    return get_token()


__all__ = ["hf_token", "publish_to_hf"]