/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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
 *
 *    https://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.
 */

package org.grails.datastore.bson.codecs.encoders

import groovy.transform.CompileStatic

import org.bson.BsonWriter
import org.bson.codecs.EncoderContext
import org.bson.codecs.configuration.CodecRegistry
import org.bson.types.ObjectId

import org.grails.datastore.bson.codecs.PropertyEncoder
import org.grails.datastore.mapping.engine.EntityAccess
import org.grails.datastore.mapping.model.config.GormProperties
import org.grails.datastore.mapping.model.types.Identity

/**
 * A {@PropertyEncoder} capable of encoding the {@link org.grails.datastore.mapping.model.types.Identity}
 */
@CompileStatic
class IdentityEncoder implements PropertyEncoder<Identity> {

    @Override
    void encode(BsonWriter writer, Identity property, Object id, EntityAccess parentAccess, EncoderContext encoderContext, CodecRegistry codecRegistry) {
        writer.writeName(getIdentifierName(property))

        if (id instanceof ObjectId) {
            writer.writeObjectId(id)
        } else if (id instanceof Number) {
            writer.writeInt64(((Number) id).toLong())
        } else {
            writer.writeString(id.toString())
        }

    }

    protected String getIdentifierName(Identity property) {
        String[] identifierName = property.getOwner().mapping.identifier?.identifierName
        if (identifierName != null) {
            return identifierName[0]
        }
        else {
            return GormProperties.IDENTITY
        }
    }
}
