# /// script
# requires-python = ">=3.11"
# dependencies = [
#   "httpx>=0.27,<1",
#   "polars>=1.24,<2",
#   "pyarrow>=18,<21",
#   "deltalake>=0.22,<2",
#   "huggingface-hub>=1.19,<2",
#   "pytest>=8,<9",
#   "pytest-asyncio>=0.24,<1",
#   "ruff>=0.11,<1",
#   "pyyaml>=6,<7",
# ]
# ///
"""Hugging Face Jobs entry point for the ZipLime corporate-actions dataset.

    restore repository -> lint -> tests -> build -> verify -> publish

The build reads two sibling datasets from the Hub. That is the point of this
one: it is glue, and what it says has to be derivable from what the others
published, not from a working copy that only exists on somebody's laptop.
"""

from __future__ import annotations

import argparse
import os
import subprocess
import sys
from pathlib import Path

DEFAULT_REPO = "ZipLime/corporate-actions"
DEFAULT_WORKSPACE = "/tmp/corporate-actions"


def log(message: str) -> None:
    print(f"[corporate-actions] {message}", flush=True)


def restore_repository(repo_id: str, token: str | None, workspace: Path) -> Path:
    from huggingface_hub import snapshot_download
    from huggingface_hub.errors import RepositoryNotFoundError

    workspace.mkdir(parents=True, exist_ok=True)
    try:
        snapshot_download(
            repo_id=repo_id, repo_type="dataset", token=token, local_dir=str(workspace),
            # Only the recipe and tests are needed: every table is rebuilt from
            # the sources each run, so restoring the data would download tens of
            # megabytes to overwrite them.
            allow_patterns=["recipe/**", "tests/**", "jobs/**", "*.md", "*.json", "*.toml"],
        )
        log(f"restored {repo_id} into {workspace}")
    except RepositoryNotFoundError:
        log(f"{repo_id} does not exist yet; treating this as the first publication")
    if not (workspace / "recipe" / "cli.py").is_file():
        raise SystemExit(f"{workspace} has no recipe; publish it before scheduling a Job")
    return workspace


def run(command: list[str], *, cwd: Path, env: dict[str, str]) -> int:
    log(f"running: {' '.join(command)}")
    return subprocess.run(command, cwd=cwd, env=env, check=False).returncode


def main(argv: list[str] | None = None) -> int:
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--mode", choices=["update", "build"], default="update")
    parser.add_argument("--workspace", default=os.environ.get("JOB_WORKSPACE", DEFAULT_WORKSPACE))
    parser.add_argument("--skip-gates", action="store_true")
    args = parser.parse_args(argv)

    token = os.environ.get("HF_TOKEN")
    if not token:
        raise SystemExit("the HF_TOKEN secret is required")
    repo_id = os.environ.get("HF_DATASET_REPO", DEFAULT_REPO)

    workspace = restore_repository(repo_id, token, Path(args.workspace))
    env = {**os.environ, "PYTHONPATH": str(workspace), "DATA_DIR": "data"}

    if not args.skip_gates:
        for name, command in (("lint", ["ruff", "check", "."]), ("tests", ["pytest", "-q"])):
            code = run(command, cwd=workspace, env=env)
            if code != 0:
                log(f"{name} failed; nothing was fetched and nothing was published")
                return code

    code = run([sys.executable, "-m", "recipe.cli", "build"], cwd=workspace, env=env)
    if code != 0:
        log("build or verification failed; nothing published")
        return code
    if args.mode == "build":
        return 0
    return run(
        [sys.executable, "-m", "recipe.cli", "publish", "--repo", repo_id],
        cwd=workspace, env=env,
    )


if __name__ == "__main__":
    raise SystemExit(main())