"""A generic view for finding an object by id."""

from flask.views import MethodView
from owsresponse import response
from owsresponse.adaptors.flask import flaskify

from abacus_common_logic.views.validations import validated_request_body


class ItemView(MethodView):
    """A generic view for operations on an existing object, specified by id."""

    def get(self, object_id, **kwargs):
        """Find object by its id or return an error."""
        obj = self.model_class.get_by_id_or_error(object_id, 404)
        body = self.object_detail_schema.dump(obj)
        return flaskify(response.Response(message=body, status=200))

    def delete(self, object_id, **kwargs):
        """Delete object by id."""
        self.model_class.delete_by_id_or_error(object_id, 404)
        return flaskify(response.Response(status=204))

    def put(self, object_id, **kwargs):
        """Update an object by id."""
        obj = self.model_class.get_by_id_or_error(object_id, 404)
        validated_params = validated_request_body(self.put_schema)
        return flaskify(self.update_handler(obj, **validated_params))

    def update_handler(self, obj, **params):
        """Override to implement custom update logic."""
        raise NotImplementedError('Override with logic.')