from __future__ import annotations

import json
from pathlib import Path
from typing import Any

from .provenance import RDockPipelineError, require_file


def load_structured_file(path: str | Path) -> dict[str, Any]:
    source = require_file(path, "structured config file")
    text = source.read_text(encoding="utf-8")
    try:
        payload = json.loads(text)
    except json.JSONDecodeError:
        try:
            import yaml
        except Exception as exc:
            raise RDockPipelineError(
                f"Could not parse {source} as JSON and PyYAML is unavailable: {exc}"
            ) from exc
        payload = yaml.safe_load(text)
    if not isinstance(payload, dict):
        raise RDockPipelineError(f"Expected mapping at top level of {source}")
    return payload


def dump_json_like(path: str | Path, payload: dict[str, Any]) -> Path:
    target = Path(path)
    target.parent.mkdir(parents=True, exist_ok=True)
    target.write_text(json.dumps(payload, indent=2), encoding="utf-8")
    return target