############################################################################
# Original work Copyright 2018 Palantir Technologies, Inc.                 #
# Original work licensed under the MIT License.                            #
# See ThirdPartyNotices.txt in the project root for license information.   #
# All modifications Copyright (c) Open Law Library. All rights reserved.   #
#                                                                          #
# 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.                                           #
############################################################################
import traceback


class JsonRpcException(Exception):
    """A class used as a base class for json rpc exceptions."""

    def __init__(self, message=None, code=None, data=None):
        message = message or getattr(self.__class__, 'MESSAGE')
        super().__init__(message)
        self.message = message
        self.code = code or getattr(self.__class__, 'CODE')
        self.data = data

    def __eq__(self, other):
        return (
            isinstance(other, self.__class__)
            and self.code == other.code
            and self.message == other.message
        )

    def __hash__(self):
        return hash((self.code, self.message))

    @staticmethod
    def from_dict(error):
        for exc_class in _EXCEPTIONS:
            if exc_class.supports_code(error['code']):
                return exc_class(**error)
        return JsonRpcException(**error)

    @classmethod
    def supports_code(cls, code):
        # Defaults to UnknownErrorCode
        return getattr(cls, 'CODE', -32001) == code

    def to_dict(self):
        exception_dict = {
            'code': self.code,
            'message': self.message,
        }
        if self.data is not None:
            exception_dict['data'] = str(self.data)
        return exception_dict


class JsonRpcInternalError(JsonRpcException):
    CODE = -32602
    MESSAGE = 'Internal Error'

    @classmethod
    def of(cls, exc_info):
        exc_type, exc_value, exc_tb = exc_info
        return cls(
            message=''.join(traceback.format_exception_only(
                exc_type, exc_value)).strip(),
            data={'traceback': traceback.format_tb(exc_tb)}
        )


class JsonRpcInvalidParams(JsonRpcException):
    CODE = -32602
    MESSAGE = 'Invalid Params'


class JsonRpcInvalidRequest(JsonRpcException):
    CODE = -32600
    MESSAGE = 'Invalid Request'


class JsonRpcMethodNotFound(JsonRpcException):
    CODE = -32601
    MESSAGE = 'Method Not Found'

    @classmethod
    def of(cls, method):
        return cls(message=cls.MESSAGE + ': ' + method)


class JsonRpcParseError(JsonRpcException):
    CODE = -32700
    MESSAGE = 'Parse Error'


class JsonRpcRequestCancelled(JsonRpcException):
    CODE = -32800
    MESSAGE = 'Request Cancelled'


class JsonRpcContentModified(JsonRpcException):
    CODE = -32801
    MESSAGE = 'Content Modified'


class JsonRpcServerError(JsonRpcException):

    def __init__(self, message, code, data=None):
        if not _is_server_error_code(code):
            raise ValueError('Error code should be in range -32099 - -32000')
        super().__init__(message=message, code=code, data=data)

    @classmethod
    def supports_code(cls, code):
        return _is_server_error_code(code)


def _is_server_error_code(code):
    return -32099 <= code <= -32000


_EXCEPTIONS = (
    JsonRpcInternalError,
    JsonRpcInvalidParams,
    JsonRpcInvalidRequest,
    JsonRpcMethodNotFound,
    JsonRpcParseError,
    JsonRpcRequestCancelled,
    JsonRpcServerError,
)


class PyglsException(Exception):
    pass


class CommandAlreadyRegisteredError(PyglsException):

    def __init__(self, command_name):
        self.command_name = command_name

    def __repr__(self):
        return f'Command "{self.command_name}" is already registered.'


class FeatureAlreadyRegisteredError(PyglsException):

    def __init__(self, feature_name):
        self.feature_name = feature_name

    def __repr__(self):
        return f'Feature "{self.feature_name}" is already registered.'


class MethodTypeNotRegisteredError(PyglsException):

    def __init__(self, name):
        self.name = name

    def __repr__(self):
        return f'"{self.name}" is not added to `pygls.lsp.LSP_METHODS_MAP`.'


class ThreadDecoratorError(PyglsException):
    pass


class ValidationError(PyglsException):

    def __init__(self, errors=None):
        self.errors = errors or []

    def __repr__(self):
        opt_errs = '\n-'.join([e for e in self.errors])
        return f'Missing options: {opt_errs}'
