# Copyright © 2019 Province of British Columbia
#
# 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.
"""Utility class to convert snake case to camel case."""

from .base_schema import BaseSchema


def camelcase(key_name):
    """Convert snake-case to camel-case."""
    parts = iter(key_name.split('_'))
    return next(parts) + ''.join(i.title() for i in parts)


class CamelCaseSchema(BaseSchema):  # pylint: disable=too-many-ancestors
    """Schema that uses camel-case for its external representation and snake-case for its internal representation."""

    def on_bind_field(self, field_name, field_obj):
        """Override the default bind method."""
        field_obj.data_key = camelcase(field_obj.data_key or field_name)
