# Copyright 2010 WebDriver committers
# Copyright 2010 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from ..common.exceptions import ElementNotSelectableException
from ..common.exceptions import ElementNotVisibleException
from ..common.exceptions import InvalidCookieDomainException
from ..common.exceptions import InvalidElementStateException
from ..common.exceptions import NoSuchElementException
from ..common.exceptions import NoSuchFrameException
from ..common.exceptions import NoSuchWindowException
from ..common.exceptions import StaleElementReferenceException
from ..common.exceptions import UnableToSetCookieException
from ..common.exceptions import ErrorInResponseException


class ErrorCode(object):
  """Error codes defined in the WebDriver wire protocol."""
  
  # Keep in sync with org.openqa.selenium.remote.ErrorCodes and errorcodes.h

  SUCCESS = 0
  NO_SUCH_ELEMENT = 7
  NO_SUCH_FRAME = 8
  UNKNOWN_COMMAND = 9
  STALE_ELEMENT_REFERENCE = 10
  ELEMENT_NOT_VISIBLE = 11
  INVALID_ELEMENT_STATE = 12
  UNKNOWN_ERROR = 13
  ELEMENT_IS_NOT_SELECTABLE = 15
  XPATH_LOOKUP_ERROR = 19
  NO_SUCH_WINDOW = 23
  INVALID_COOKIE_DOMAIN = 24
  UNABLE_TO_SET_COOKIE = 25


class ErrorHandler(object):
  """Handles errors returned by the WebDriver server."""

  def check_response(self, response):
    """Checks that a JSON response from the WebDriver does not have an error.

    Args:
      response - The JSON response from the WebDriver server as a dictionary
          object.

    Raises:
      If the response contains an error message.
    """
    status = response['status']
    if status == ErrorCode.SUCCESS:
      return

    exception_class = ErrorInResponseException
    if status == ErrorCode.NO_SUCH_ELEMENT:
      exception_class = NoSuchElementException
    elif status == ErrorCode.NO_SUCH_FRAME:
      exception_class = NoSuchFrameException
    elif status == ErrorCode.NO_SUCH_WINDOW:
      exception_class = NoSuchWindowException
    elif status == ErrorCode.STALE_ELEMENT_REFERENCE:
      exception_class = StaleElementReferenceException
    elif status == ErrorCode.ELEMENT_NOT_VISIBLE:
      exception_class = ElementNotVisibleException
    elif status == ErrorCode.INVALID_ELEMENT_STATE:
      exception_class = InvalidElementStateException
    elif status == ErrorCode.ELEMENT_IS_NOT_SELECTABLE:
      exception_class = ElementNotSelectableException
    elif status == ErrorCode.INVALID_COOKIE_DOMAIN:
      exception_class = InvalidCookieDomainException
    elif status == ErrorCode.UNABLE_TO_SET_COOKIE:
      exception_class = UnableToSetCookieException

    value = response['value']
    if type(value) is str:
      if exception_class == ErrorInResponseException:
          raise exception_class(response, value)
      raise exception_class(value)

    message = ''
    if 'message' in value:
      message = value['message']

    # TODO:  What about 'screen' and 'stackTrace'?
    if exception_class == ErrorInResponseException:
        raise exception_class(response, message)
    raise exception_class(message)
