import json
from decimal import Decimal
from datetime import datetime

from typing import Type, List, Dict, Union, Any

JSON = Union[Dict[str, "JSON"], List["JSON"], bool, int, float, str, Type[None]]

class JSONEncoder(json.JSONEncoder):
    def encode(self, obj: JSON) -> str:
        def _convert_float_to_str(data: JSON) -> JSON:
            if isinstance(data, float):
                return format(Decimal(repr(data)), "f")
            elif isinstance(data, list):
                return [ _convert_float_to_str(sub_data) for sub_data in data ]
            elif isinstance(data, dict):
                return { key: _convert_float_to_str(value) for key, value in data.items() }
            else: return data

        data = _convert_float_to_str(obj)

        return json.JSONEncoder.encode(self, data)

    def default(self, obj: Any) -> Any:
        if isinstance(obj, Decimal):
            return format(obj, "f")
            
        if isinstance(obj, datetime):
            return str(obj)

        return json.JSONEncoder.default(self, obj)