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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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.gravitee.node.cluster.spring;

import com.hazelcast.config.Config;
import com.hazelcast.config.FileSystemXmlConfig;
import com.hazelcast.config.FileSystemYamlConfig;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.spi.properties.ClusterProperty;
import io.gravitee.node.api.cache.CacheManager;
import io.gravitee.node.api.cluster.ClusterManager;
import io.gravitee.node.api.message.MessageProducer;
import io.gravitee.node.cache.hazelcast.HazelcastCacheManager;
import io.gravitee.node.cluster.hazelcast.HazelcastClusterManager;
import io.gravitee.node.cluster.hazelcast.HazelcastMessageProducer;
import java.io.FileNotFoundException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.*;
import org.springframework.core.type.AnnotatedTypeMetadata;

/**
 * @author Kamiel Ahmadpour (kamiel.ahmadpour at graviteesource.com)
 * @author GraviteeSource Team
 */
@Configuration
@Conditional(HazelcastClusterConfiguration.ClusterModeEnabled.class)
public class HazelcastClusterConfiguration {

    @Value("${cluster.hazelcast.config.path:${gravitee.home}/config/hazelcast.xml}")
    private String hazelcastConfigFilePath;

    @Bean
    public HazelcastInstance distributedHazelcastInstance() throws Exception {
        // Force Hazelcast to use SLF4J before loading any HZ classes
        System.setProperty(ClusterProperty.LOGGING_TYPE.getName(), "slf4j");
        System.setProperty(ClusterProperty.SHUTDOWNHOOK_ENABLED.getName(), "false");

        Config config = fromFilePath(hazelcastConfigFilePath);

        // Force the classloader used by Hazelcast to the container's classloader.
        config.setClassLoader(ClusterConfiguration.class.getClassLoader());

        config.setProperty(ClusterProperty.HEALTH_MONITORING_LEVEL.getName(), "OFF");

        return Hazelcast.newHazelcastInstance(config);
    }

    @Bean("hazelcastClusterManager")
    public ClusterManager hazelcastClusterManager() {
        return new HazelcastClusterManager();
    }

    @Bean("hazelcastCacheManager")
    public CacheManager hazelcastCacheManager(HazelcastInstance hazelcastInstance) {
        return new HazelcastCacheManager(hazelcastInstance);
    }

    @Bean("hazelcastMessageProducer")
    public MessageProducer hazelcastMessageProducer() {
        return new HazelcastMessageProducer();
    }

    public static class ClusterModeEnabled implements ConfigurationCondition {

        @Override
        public boolean matches(ConditionContext conditionContext, AnnotatedTypeMetadata annotatedTypeMetadata) {
            return conditionContext.getEnvironment().getProperty("gravitee.cluster.enabled", Boolean.class, false);
        }

        @Override
        public ConfigurationPhase getConfigurationPhase() {
            return ConfigurationPhase.REGISTER_BEAN;
        }
    }

    private Config fromFilePath(String filePath) throws FileNotFoundException {
        if (filePath.endsWith("xml")) {
            return new FileSystemXmlConfig(hazelcastConfigFilePath);
        } else if (filePath.endsWith("yaml") || filePath.endsWith("yml")) {
            return new FileSystemYamlConfig(hazelcastConfigFilePath);
        }

        throw new IllegalArgumentException("Only xml or yaml file supported for Hazelcast configuration");
    }
}