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    /*
 * Copyright 2017-2019 original authors
 *
 * 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 io.micronaut.openapi.util;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
import io.micronaut.core.annotation.Internal;
import io.swagger.v3.core.jackson.SchemaSerializer;
import io.swagger.v3.core.jackson.mixin.ExtensionsMixin;
import io.swagger.v3.core.util.DeserializationModule;
import io.swagger.v3.oas.models.*;
import io.swagger.v3.oas.models.callbacks.Callback;
import io.swagger.v3.oas.models.examples.Example;
import io.swagger.v3.oas.models.headers.Header;
import io.swagger.v3.oas.models.info.Contact;
import io.swagger.v3.oas.models.info.Info;
import io.swagger.v3.oas.models.info.License;
import io.swagger.v3.oas.models.links.Link;
import io.swagger.v3.oas.models.links.LinkParameter;
import io.swagger.v3.oas.models.media.*;
import io.swagger.v3.oas.models.parameters.Parameter;
import io.swagger.v3.oas.models.parameters.RequestBody;
import io.swagger.v3.oas.models.responses.ApiResponse;
import io.swagger.v3.oas.models.security.OAuthFlow;
import io.swagger.v3.oas.models.security.OAuthFlows;
import io.swagger.v3.oas.models.security.Scopes;
import io.swagger.v3.oas.models.security.SecurityScheme;
import io.swagger.v3.oas.models.servers.Server;
import io.swagger.v3.oas.models.servers.ServerVariable;
import io.swagger.v3.oas.models.servers.ServerVariables;
import io.swagger.v3.oas.models.tags.Tag;

import java.util.Arrays;
import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;

/**
 * Helper class for generating Swagger YAML.
 *
 * @author graemerocher
 * @since 1.0
 */
@Internal
public final class Yaml {

    /**
     * Obtains the YAML mapper.
     *
     * @return The yaml mapper
     */
    public static ObjectMapper mapper() {
        YAMLFactory factory = new YAMLFactory();
        factory.disable(YAMLGenerator.Feature.WRITE_DOC_START_MARKER);
        factory.enable(YAMLGenerator.Feature.MINIMIZE_QUOTES);
        factory.enable(YAMLGenerator.Feature.SPLIT_LINES);
        factory.enable(YAMLGenerator.Feature.ALWAYS_QUOTE_NUMBERS_AS_STRINGS);

        ObjectMapper mapper = new ObjectMapper(factory);

        // handle ref schema serialization skipping all other props
        mapper.registerModule(new SimpleModule() {
            @Override
            public void setupModule(SetupContext context) {
                super.setupModule(context);
                context.addBeanSerializerModifier(new BeanSerializerModifier() {
                    @Override
                    public JsonSerializer modifySerializer(
                            SerializationConfig config, BeanDescription desc, JsonSerializer serializer) {
                        if (Schema.class.isAssignableFrom(desc.getBeanClass())) {
                            return new SchemaSerializer((JsonSerializer) serializer);
                        }
                        return serializer;
                    }
                });
            }
        });

        Module deserializerModule = new DeserializationModule();
        mapper.registerModule(deserializerModule);

        List> mixinTargets = Arrays.asList(
                ApiResponse.class,
                Callback.class,
                Components.class,
                Contact.class,
                Encoding.class,
                EncodingProperty.class,
                Example.class,
                ExternalDocumentation.class,
                Header.class,
                Info.class,
                License.class,
                Link.class,
                LinkParameter.class,
                MediaType.class,
                OAuthFlow.class,
                OAuthFlows.class,
                OpenAPI.class,
                Operation.class,
                Parameter.class,
                PathItem.class,
                Paths.class,
                RequestBody.class,
                Scopes.class,
                SecurityScheme.class,
                Server.class,
                ServerVariable.class,
                ServerVariables.class,
                Tag.class,
                XML.class,
                Schema.class
        );
        mapper.setMixIns(mixinTargets.stream().collect(Collectors.toMap(Function.identity(), c -> ExtensionsMixin.class)));

        mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
        mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        mapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        mapper.configure(SerializationFeature.WRITE_NULL_MAP_VALUES, false);
        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);

        return mapper;
    }
}

    
    
    
    

    




    
    
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