from __future__ import unicode_literals
import json


class AWSError(Exception):
    TYPE = None
    STATUS = 400

    def __init__(self, message, type=None, status=None):
        self.message = message
        self.type = type if type is not None else self.TYPE
        self.status = status if status is not None else self.STATUS

    def response(self):
        return json.dumps({'__type': self.type, 'message': self.message}), dict(status=self.status)


class ExecutionDoesNotExist(AWSError):
    TYPE = 'ExecutionDoesNotExist'
    STATUS = 400


class InvalidArn(AWSError):
    TYPE = 'InvalidArn'
    STATUS = 400


class InvalidName(AWSError):
    TYPE = 'InvalidName'
    STATUS = 400


class StateMachineDoesNotExist(AWSError):
    TYPE = 'StateMachineDoesNotExist'
    STATUS = 400