<%#
 Copyright 2013-2021 the original author or authors from the JHipster project.

 This file is part of the JHipster project, see https://www.jhipster.tech/
 for more information.

 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

      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 <%= packageName %>.config;

import tech.jhipster.config.JHipsterConstants;
import tech.jhipster.config.JHipsterProperties;

import com.couchbase.client.java.Bucket;
import com.couchbase.client.java.Cluster;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.couchmove.Couchmove;

import <%= packageName %>.config.couchbase.CustomCouchbaseRepositoryFactoryBean;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.couchbase.CouchbaseProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.*;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.GenericConverter;
import org.springframework.core.convert.support.GenericConversionService;
<%_ if (searchEngineElasticsearch) { _%>
import org.springframework.data.elasticsearch.repository.config.Enable<% if (reactive) { %>Reactive<% } %>ElasticsearchRepositories;
<%_ } _%>
import org.springframework.data.convert.ReadingConverter;
import org.springframework.data.convert.WritingConverter;
import org.springframework.data.couchbase.config.AbstractCouchbaseConfiguration;
import org.springframework.data.couchbase.config.BeanNames;
import org.springframework.data.couchbase.core.convert.CouchbaseCustomConversions;
import org.springframework.data.couchbase.core.convert.MappingCouchbaseConverter;
import org.springframework.data.couchbase.core.mapping.CouchbaseMappingContext;
import org.springframework.data.couchbase.core.mapping.event.ValidatingCouchbaseEventListener;
<%_ if (!reactive) { _%>
import org.springframework.data.couchbase.repository.auditing.EnableCouchbaseAuditing;
<%_ } _%>
import org.springframework.data.couchbase.repository.config.Enable<%_ if (reactive) { _%>Reactive<% } %>CouchbaseRepositories;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.util.StringUtils;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.*;
<%_ if (reactive) { _%>
import java.lang.reflect.Field;
import org.springframework.data.repository.util.QueryExecutionConverters;
import reactor.core.publisher.Flux;
<%_ } _%>

@Configuration
@EnableConfigurationProperties(CouchbaseProperties.class)
<%_ if (searchEngineElasticsearch) { _%>
@Enable<% if (reactive) { %>Reactive<% } %>ElasticsearchRepositories("<%= packageName %>.repository.search")
<%_ } _%>
@Profile("!" + JHipsterConstants.SPRING_PROFILE_CLOUD)
@Enable<% if (reactive) { %>Reactive<% } %>CouchbaseRepositories(basePackages = "<%= packageName %>.repository", repositoryFactoryBeanClass = CustomCouchbaseRepositoryFactoryBean.class<%_ if (searchEngineElasticsearch) { %>,
    includeFilters = @Filter(type = FilterType.ASSIGNABLE_TYPE, value = <% if (reactive) { %>Reactive<% } %>CouchbaseRepository.class)<%_ } _%>)
<%_ if (!reactive) { _%>
@EnableCouchbaseAuditing(auditorAwareRef = "springSecurityAuditorAware", dateTimeProviderRef = "")
<%_ } _%>
public class DatabaseConfiguration extends AbstractCouchbaseConfiguration {

    private final Logger log = LoggerFactory.getLogger(DatabaseConfiguration.class);

    private final JHipsterProperties jHipsterProperties;
    private final CouchbaseProperties couchbaseProperties;

    public DatabaseConfiguration(JHipsterProperties jHipsterProperties, CouchbaseProperties couchbaseProperties) {
        this.jHipsterProperties = jHipsterProperties;
        this.couchbaseProperties = couchbaseProperties;
        <% if (reactive) { %>allowPageable();<% } %>
    }

<%_ if (reactive) { _%>
    // Temporary Hack to fix pageable
    @SuppressWarnings("unchecked")
    private void allowPageable() {
        try {
            Field allowed_pageable_types = QueryExecutionConverters.class.getDeclaredField("ALLOWED_PAGEABLE_TYPES");
            allowed_pageable_types.setAccessible(true);
            Set<Class<?>> ALLOWED_PAGEABLE_TYPES = (Set<Class<?>>) allowed_pageable_types.get(QueryExecutionConverters.class);
            ALLOWED_PAGEABLE_TYPES.add(Flux.class);
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
    }

<%_ } _%>
    @Bean
    public ValidatingCouchbaseEventListener validatingCouchbaseEventListener() {
        return new ValidatingCouchbaseEventListener(validator());
    }

    @Bean
    public LocalValidatorFactoryBean validator() {
        return new LocalValidatorFactoryBean();
    }

    @Override
    public String getConnectionString() {
        return couchbaseProperties.getConnectionString();
    }

    @Override
    public String getUserName() {
        return couchbaseProperties.getUsername();
    }

    @Override
    public String getPassword() {
        return couchbaseProperties.getPassword();
    }

    @Override
    public String getBucketName() {
        return jHipsterProperties.getDatabase().getCouchbase().getBucketName();
    }

    @Bean
    public Bucket bucket(Cluster cluster) {
        return cluster.bucket(jHipsterProperties.getDatabase().getCouchbase().getBucketName());
    }

    @Bean(name = BeanNames.COUCHBASE_CUSTOM_CONVERSIONS)
    public CouchbaseCustomConversions customConversions() {
        List<Converter<?, ?>> converters = new ArrayList<>();
        converters.add(ZonedDateTimeToLongConverter.INSTANCE);
        converters.add(NumberToLocalDateTimeConverter.INSTANCE);
        converters.add(BigIntegerToStringConverter.INSTANCE);
        converters.add(StringToBigIntegerConverter.INSTANCE);
        converters.add(BigDecimalToStringConverter.INSTANCE);
        converters.add(StringToBigDecimalConverter.INSTANCE);
        converters.add(StringToByteConverter.INSTANCE);
        converters.add(UUIDToStringConverter.INSTANCE);
        converters.add(StringToUUIDConverter.INSTANCE);
        return new CouchbaseCustomConversions(converters);
    }

    @Override
    public MappingCouchbaseConverter mappingCouchbaseConverter(CouchbaseMappingContext couchbaseMappingContext, CouchbaseCustomConversions couchbaseCustomConversions) {
        MappingCouchbaseConverter mappingCouchbaseConverter = super.mappingCouchbaseConverter(couchbaseMappingContext, couchbaseCustomConversions);
        ((GenericConversionService) mappingCouchbaseConverter.getConversionService()).addConverter(StringToObjectConverter.INSTANCE);
        return mappingCouchbaseConverter;
    }

    /**
     * Workaround for Couchbase overriding SB default jackson mapper: https://github.com/spring-projects/spring-data-couchbase/issues/1209
     */
    @Bean
    @Primary
    ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
        return builder.createXmlMapper(false).build();
    }

    @Bean
    public Couchmove couchmove(Cluster cluster) {
        log.debug("Configuring Couchmove");
        Bucket bucket = cluster.bucket(getBucketName());
        Couchmove couchmove = new Couchmove(bucket, cluster, "config/couchmove/changelog");
        couchmove.migrate();
        couchmove.buildN1qlDeferredIndexes();
        return couchmove;
    }

    /**
     * Simple singleton to convert {@link ZonedDateTime}s to their {@link Long} representation.
     */
    @WritingConverter
    public enum ZonedDateTimeToLongConverter implements Converter<ZonedDateTime, Long> {
        INSTANCE;

        @Override
        public Long convert(ZonedDateTime source) {
            return source == null ? null : Date.from(source.toInstant()).getTime();
        }
    }

    /**
     * Simple singleton to convert from {@link Number} {@link BigDecimal} representation.
     */
    @ReadingConverter
    public enum NumberToLocalDateTimeConverter implements Converter<Number, ZonedDateTime> {
        INSTANCE;

        @Override
        public ZonedDateTime convert(Number source) {
            return source == null ? null : ZonedDateTime.ofInstant(new Date(source.longValue()).toInstant(), ZoneId.systemDefault());
        }

    }

    /**
     * Simple singleton to convert {@link BigDecimal}s to their {@link String} representation.
     */
    @WritingConverter
    public enum BigDecimalToStringConverter implements Converter<BigDecimal, String> {
        INSTANCE;

        public String convert(BigDecimal source) {
            return source == null ? null : source.toString();
        }
    }

    /**
     * Simple singleton to convert from {@link String} {@link BigDecimal} representation.
     */
    @ReadingConverter
    public enum StringToBigDecimalConverter implements Converter<String, BigDecimal> {
        INSTANCE;

        public BigDecimal convert(String source) {
            return StringUtils.hasText(source) ? new BigDecimal(source) : null;
        }
    }

    /**
     * Simple singleton to convert {@link BigInteger}s to their {@link String} representation.
     */
    @WritingConverter
    public enum BigIntegerToStringConverter implements Converter<BigInteger, String> {
        INSTANCE;

        public String convert(BigInteger source) {
            return source == null ? null : source.toString();
        }
    }

    /**
     * Simple singleton to convert from {@link String} {@link BigInteger} representation.
     */
    @ReadingConverter
    public enum StringToBigIntegerConverter implements Converter<String, BigInteger> {
        INSTANCE;

        public BigInteger convert(String source) {
            return StringUtils.hasText(source) ? new BigInteger(source) : null;
        }
    }

    /**
     * Simple singleton to convert from {@link String} {@code byte[]} representation.
     */
    @ReadingConverter
    public enum StringToByteConverter implements Converter<String, byte[]> {
        INSTANCE;

        @Override
        public byte[] convert(String source) {
            return Base64.getDecoder().decode(source);
        }
    }

    /**
     * Simple singleton to convert {@link UUID}s to their {@link String} representation.
     */
    @WritingConverter
    public enum UUIDToStringConverter implements Converter<UUID, String> {
        INSTANCE;

        @Override
        public String convert(UUID source) {
            return source == null ? null : source.toString();
        }
    }

    /**
     * Simple singleton to convert from {@link String} {@link UUID} representation.
     */
    @ReadingConverter
    public enum StringToUUIDConverter implements Converter<String, UUID> {
        INSTANCE;

        @Override
        public UUID convert(String source) {
            return source == null ? null : UUID.fromString(source);
        }

    }

    public enum StringToObjectConverter implements GenericConverter {
        INSTANCE;

        @Override
        public Set<ConvertiblePair> getConvertibleTypes() {
            return Collections.singleton(new ConvertiblePair(String.class, Object.class));
        }

        @Override
        public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) {
            return null;
        }
    }
}