from pathlib import Path
import json

from src.chunking.models import Chunk
from src.chunking.validators import validate_chunks


def write_chunks(chunks: list[Chunk], output_path: str | Path) -> None:
    validate_chunks(chunks)
    path = Path(output_path)
    path.parent.mkdir(parents=True, exist_ok=True)

    if path.suffix.lower() == ".json":
        path.write_text(
            json.dumps([chunk.to_dict() for chunk in chunks], ensure_ascii=False, indent=2),
            encoding="utf-8",
        )
        return

    if path.suffix.lower() != ".jsonl":
        raise ValueError("Output path must end with .jsonl or .json")

    with path.open("w", encoding="utf-8") as file:
        for chunk in chunks:
            file.write(json.dumps(chunk.to_dict(), ensure_ascii=False) + "\n")