#!/usr/bin/env python3
import argparse
from pathlib import Path
from typing import Union
import plyvel
import json
from sys import stdout
import base64

parser = argparse.ArgumentParser()
parser.add_argument(
    "--encode",
    "-e",
    choices=["utf8", "base16", "base32", "base64", "base85"],
    default="utf8",
)
parser.add_argument("db_path", type=Path)
cli_args = parser.parse_args()


def bytes_to_json(b: bytes) -> Union[str, list[int]]:
    if cli_args.encode == "utf8":
        try:
            return b.decode("utf8")
        except UnicodeDecodeError:
            return list(b)
    elif cli_args.encode == "base16":
        return base64.b16encode(b).decode("ascii")
    elif cli_args.encode == "base32":
        return base64.b32encode(b).decode("ascii")
    elif cli_args.encode == "base64":
        return base64.b64encode(b).decode("ascii")
    elif cli_args.encode == "base85":
        return base64.b85encode(b).decode("ascii")
    else:
        assert False


db = plyvel.DB(str(cli_args.db_path), create_if_missing=False)
with db.iterator() as iterator:
    for key, value in iterator:
        json.dump({"key": bytes_to_json(key), "value": bytes_to_json(value)}, stdout)
        stdout.write("\n")