from pathlib import Path
from  langchain.schema import Document
import json
from typing import Iterable

def save_docs_to_jsonl(array:Iterable[Document], path: str)->None:
    """
    Save an array of Document objects to a JSONL file.

    Args:
        array: An iterable of Document objects.
        path: The path to the folder where the output file should be.

    Returns:
        None
    """
    Path(path).mkdir(parents=True, exist_ok=True)
    with open(f"{path}/data.jsonl", 'w', encoding='utf-8') as jsonl_file:
        for doc in array:
            jsonl_file.write(doc.json() + '\n')

def load_docs_from_jsonl(path: str) -> Iterable[Document]:
    """
    Load an array of Document objects from a JSONL file.

    Args:
        path: The path to the folder where the input file is.

    Returns:
        An iterable of Document objects.
    """
    array = []
    with open(f"{path}/data.jsonl", 'r', encoding='utf-8') as jsonl_file:
        for line in jsonl_file:
            data = json.loads(line)
            obj = Document(**data)
            array.append(obj)
    return array