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/*
 * Copyright 2017-2020 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
 *
 * 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 io.micronaut.elasticsearch.convert;

import io.micronaut.context.annotation.Requires;
import io.micronaut.core.convert.ConversionContext;
import io.micronaut.core.convert.TypeConverter;
import org.elasticsearch.client.NodeSelector;
import org.elasticsearch.client.RestClientBuilder;

import javax.inject.Singleton;
import java.util.Locale;
import java.util.Optional;

/**
 * Converts String to {@link NodeSelector}.
 *
 * @author Puneet Behl
 * @since 1.0.0
 */
@Singleton
@Requires(classes = RestClientBuilder.class)
public class StringToNodeSelectorConverter implements TypeConverter {

    @Override
    public Optional convert(CharSequence object, Class targetType, ConversionContext context) {
        String nodeSelector = object.toString().toUpperCase(Locale.ENGLISH);
        switch (nodeSelector) {
            case "SKIP_DEDICATED_MASTERS":
                return Optional.of(NodeSelector.SKIP_DEDICATED_MASTERS);
            case "ANY":
                return Optional.of(NodeSelector.ANY);
            default:
                return Optional.empty();
        }
    }
}