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/*
 * Copyright 2018 Alfresco, Inc. and/or its affiliates.
 *
 * 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.
 */

package org.activiti.api.runtime.conf.impl;

import com.fasterxml.jackson.core.Version;
import com.fasterxml.jackson.databind.BeanDescription;
import com.fasterxml.jackson.databind.DeserializationConfig;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.jsontype.NamedType;
import com.fasterxml.jackson.databind.module.SimpleAbstractTypeResolver;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.activiti.api.model.shared.EmptyResult;
import org.activiti.api.model.shared.Payload;
import org.activiti.api.model.shared.Result;
import org.activiti.api.model.shared.model.VariableInstance;
import org.activiti.api.runtime.model.impl.VariableInstanceImpl;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

@Configuration
@PropertySource("classpath:conf/rest-jackson-configuration.properties") //load default jackson configuration
public class CommonModelAutoConfiguration {

    //this bean will be automatically injected inside boot's ObjectMapper
    @Bean
    public Module customizeCommonModelObjectMapper() {
        SimpleModule module = new SimpleModule("mapCommonModelInterfaces",
                                               Version.unknownVersion());
        SimpleAbstractTypeResolver resolver = new SimpleAbstractTypeResolver() {
            //this is a workaround for https://github.com/FasterXML/jackson-databind/issues/2019
            //once version 2.9.6 is related we can remove this @override method
            @Override
            public JavaType resolveAbstractType(DeserializationConfig config,
                                                BeanDescription typeDesc) {
                return findTypeMapping(config,
                                       typeDesc.getType());
            }
        };

        resolver.addMapping(VariableInstance.class,
                            VariableInstanceImpl.class);

        module.setAbstractTypes(resolver);

        module.setMixInAnnotation(Payload.class,
                                  PayloadMixIn.class);
        module.setMixInAnnotation(Result.class,
                                  ResultMixIn.class);

        module.registerSubtypes(new NamedType(EmptyResult.class,
                                              EmptyResult.class.getSimpleName()));

        return module;
    }
}