class HTTPException(Exception):
    """ Base class for HTTP exceptions """


class InvalidResponse(HTTPException):
    """ Response message cannot be parsed """

    def __init(self, message):
        self.message = message


class InvalidStatusLine(HTTPException):
    """ Response status line is invalid """

    def __init(self, line):
        self.line = line


class UnsupportedEncoding(HTTPException):
    """ Encoding not supported """

    def __init(self, enc_type, encoding):
        self.enc_type = enc_type
        self.encoding = encoding


class IncompleteResponse(HTTPException):
    def __init(self, cause):
        self.cause = cause


class HTTPServerException(Exception):
    """ Base class for HTTP Server exceptions """
    status_code: str
    message: str
    body: str

    def __init__(self, body=""):
        self.body = body


class HTTPServerCloseException(HTTPServerException):
    """ When thrown, the connection should be closed """


class BadRequest(HTTPServerCloseException):
    """ Malformed HTTP request"""
    status_code = 400
    message = "Bad Request"


class Forbidden(HTTPServerException):
    """ Request not allowed """
    status_code = 403
    message = "Forbidden"


class NotFound(HTTPServerException):
    """ Resource not found """
    status_code = 404
    message = "Not Found"


class MethodNotAllowed(HTTPServerException):
    """ Method is not allowed """
    status_code = 405
    message = "Method Not Allowed"

    def __init(self, allowed_methods):
        self.allowed_methods = allowed_methods


class InternalServerError(HTTPServerCloseException):
    """ Internal Server Error """
    status_code = 500
    message = "Internal Server Error"


class NotImplemented(HTTPServerException):
    """ Functionality not implemented """
    status_code = 501
    message = "Not Implemented"


class HTTPVersionNotSupported(HTTPServerCloseException):
    """ The server does not support the major version HTTP used in the request message """
    status_code = 505
    message = "HTTP Version Not Supported"


class Conflict(HTTPServerException):
    """ Conflict in the current state of the target resource """
    status_code = 409
    message = "Conflict"


class NotModified(HTTPServerException):
    """ Requested resource was not modified """
    status_code = 304
    message = "Not Modified"


class InvalidRequestLine(BadRequest):
    """ Request start-line is invalid """

    def __init__(self, line):
        self.request_line = line