import os
import pandas as pd

def get_questions(file_path, level):
    df = pd.read_json(file_path, lines=True)
    df = df[df["Level"] == level]
    
    result=[]
    
    for index, row in df.iterrows():
        result.append([row["Level"], row["Question"], row["file_name"], row["Final answer"]])

    return result

def read_file(file_path):
    df = None

    ext = os.path.splitext(file_path)[1].lower()

    if ext == ".csv":
        df = pd.read_csv(file_path)
    elif ext in (".xls", ".xlsx"):
        df = pd.read_excel(file_path)
    elif ext in (".json", ".jsonl"):
        df = pd.read_json(file_path)

    return "" if df is None else df.to_json()