from __future__ import annotations

import json
from pathlib import Path
from typing import Any

from .models import SourceConfig
from .pipeline import _source_config_from_dict


def load_json(path: Path) -> Any:
    return json.loads(path.read_text(encoding="utf-8"))


def load_source_configs(path: Path) -> list[SourceConfig]:
    raw = load_json(path)
    if not isinstance(raw, list):
        raise ValueError("sources config must be a list")
    return [_source_config_from_dict(item) for item in raw]


def load_pipeline_config(path: Path) -> dict[str, Any]:
    if not path.exists():
        return {}
    raw = load_json(path)
    if not isinstance(raw, dict):
        raise ValueError("pipeline config must be an object")
    return raw