from django.core.handlers.wsgi import STATUS_CODE_TEXT

__all__ =['status', 'NoContent', 'Response', ]


class Status(object):
    """Descriptive HTTP status codes, for code readability.
    See RFC 2616 - Sec 10: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html"""
    
    # Verbose format (I prefer this as it's more explicit)
    HTTP_100_CONTINUE = 100
    HTTP_101_SWITCHING_PROTOCOLS = 101
    HTTP_200_OK = 200
    HTTP_201_CREATED = 201
    HTTP_202_ACCEPTED = 202
    HTTP_203_NON_AUTHORITATIVE_INFORMATION = 203
    HTTP_204_NO_CONTENT = 204
    HTTP_205_RESET_CONTENT = 205
    HTTP_206_PARTIAL_CONTENT = 206
    HTTP_300_MULTIPLE_CHOICES = 300
    HTTP_301_MOVED_PERMANENTLY = 301
    HTTP_302_FOUND = 302
    HTTP_303_SEE_OTHER = 303
    HTTP_304_NOT_MODIFIED = 304
    HTTP_305_USE_PROXY = 305
    HTTP_306_RESERVED = 306
    HTTP_307_TEMPORARY_REDIRECT = 307
    HTTP_400_BAD_REQUEST = 400
    HTTP_401_UNAUTHORIZED = 401
    HTTP_402_PAYMENT_REQUIRED = 402
    HTTP_403_FORBIDDEN = 403
    HTTP_404_NOT_FOUND = 404
    HTTP_405_METHOD_NOT_ALLOWED = 405
    HTTP_406_NOT_ACCEPTABLE = 406
    HTTP_407_PROXY_AUTHENTICATION_REQUIRED = 407
    HTTP_408_REQUEST_TIMEOUT = 408
    HTTP_409_CONFLICT = 409
    HTTP_410_GONE = 410
    HTTP_411_LENGTH_REQUIRED = 411
    HTTP_412_PRECONDITION_FAILED = 412
    HTTP_413_REQUEST_ENTITY_TOO_LARGE = 413
    HTTP_414_REQUEST_URI_TOO_LONG = 414
    HTTP_415_UNSUPPORTED_MEDIA_TYPE = 415
    HTTP_416_REQUESTED_RANGE_NOT_SATISFIABLE = 416
    HTTP_417_EXPECTATION_FAILED = 417
    HTTP_500_INTERNAL_SERVER_ERROR = 500
    HTTP_501_NOT_IMPLEMENTED = 501
    HTTP_502_BAD_GATEWAY = 502
    HTTP_503_SERVICE_UNAVAILABLE = 503
    HTTP_504_GATEWAY_TIMEOUT = 504
    HTTP_505_HTTP_VERSION_NOT_SUPPORTED = 505

    # Short format
    CONTINUE = 100
    SWITCHING_PROTOCOLS = 101
    OK = 200
    CREATED = 201
    ACCEPTED = 202
    NON_AUTHORITATIVE_INFORMATION = 203
    NO_CONTENT = 204
    RESET_CONTENT = 205
    PARTIAL_CONTENT = 206
    MULTIPLE_CHOICES = 300
    MOVED_PERMANENTLY = 301
    FOUND = 302
    SEE_OTHER = 303
    NOT_MODIFIED = 304
    USE_PROXY = 305
    RESERVED = 306
    TEMPORARY_REDIRECT = 307
    BAD_REQUEST = 400
    UNAUTHORIZED = 401
    PAYMENT_REQUIRED = 402
    FORBIDDEN = 403
    NOT_FOUND = 404
    METHOD_NOT_ALLOWED = 405
    NOT_ACCEPTABLE = 406
    PROXY_AUTHENTICATION_REQUIRED = 407
    REQUEST_TIMEOUT = 408
    CONFLICT = 409
    GONE = 410
    LENGTH_REQUIRED = 411
    PRECONDITION_FAILED = 412
    REQUEST_ENTITY_TOO_LARGE = 413
    REQUEST_URI_TOO_LONG = 414
    UNSUPPORTED_MEDIA_TYPE = 415
    REQUESTED_RANGE_NOT_SATISFIABLE = 416
    EXPECTATION_FAILED = 417
    INTERNAL_SERVER_ERROR = 500
    NOT_IMPLEMENTED = 501
    BAD_GATEWAY = 502
    SERVICE_UNAVAILABLE = 503
    GATEWAY_TIMEOUT = 504
    HTTP_VERSION_NOT_SUPPORTED = 505



# This is simply stylistic, I think 'status.HTTP_200_OK' reads nicely.
status = Status()


class NoContent(object):
    """Used to indicate no body in http response.
    (We cannot just use None, as that is a valid, serializable response object.)"""
    pass


class Response(object):
    def __init__(self, status=200, content=NoContent, headers={}):
        self.status = status
        self.has_content_body = not content is NoContent
        self.raw_content = content      # content prior to filtering
        self.cleaned_content = content  # content after filtering
        self.headers = headers
 
    @property
    def status_text(self):
        """Return reason text corrosponding to our HTTP response status code.
        Provided for convienience."""
        return STATUS_CODE_TEXT.get(self.status, '')


class ResponseException(BaseException):
    def __init__(self, status, content=NoContent, headers={}):
        self.response = Response(status, content=content, headers=headers)