# Copyright (C) 2020 Arm Limited or its affiliates. All rights reserved.
#
# SPDX-License-Identifier: Apache-2.0
#
# 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
#
# 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.
# Description:
# Defines custom exceptions.


class VelaError(Exception):
    """Base class for vela exceptions"""

    def __init__(self, data):
        self.data = f"Error: {data}"
        self.error_msg = data

    def __str__(self):
        return repr(self.data)


class InputFileError(VelaError):
    """Raised when reading an input file results in errors"""

    def __init__(self, file_name, msg):
        super().__init__(f"Reading input file '{file_name}': {msg}")


class UnsupportedFeatureError(VelaError):
    """Raised when the input network uses non-supported features that cannot be handled"""

    def __init__(self, data):
        super().__init__(f"Input network uses a feature that is currently not supported: {data}")


class CliOptionError(VelaError):
    """Raised for errors encountered with a command line option

    :param option: str object that contains the name of the command line option
    :param option_value: the command line option that resulted in the error
    :param msg: str object that contains a description of the specific error encountered
    """

    def __init__(self, option, option_value, msg):
        super().__init__(f"Incorrect argument to CLI option {option}={option_value}: {msg}")


class ConfigOptionError(VelaError):
    """Raised for errors encountered with a configuration option

    :param option: str object that contains the name of the configuration option
    :param option_value: the configuration option that resulted in the error
    :param option_valid_values (optional): str object that contains the valid configuration option values
    """

    def __init__(self, option, option_value, option_valid_values=None):
        data = f"Invalid configuration of {option}={option_value}"
        if option_valid_values is not None:
            data += f" (must be {option_valid_values})"
        super().__init__(data)


class AllocationError(VelaError):
    """Raised when allocation fails"""

    def __init__(self, msg):
        super().__init__(f"Allocation failed: {msg}")