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/*
 * ConnectSdkConnectionAutoConfiguration.java
 * Copyright 2019 Rob Spoor
 *
 * 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 com.github.robtimus.connect.sdk.java.springboot.autoconfigure;

import java.net.URI;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import com.ingenico.connect.gateway.sdk.java.Connection;
import com.ingenico.connect.gateway.sdk.java.PooledConnection;
import com.ingenico.connect.gateway.sdk.java.ProxyConfiguration;
import com.ingenico.connect.gateway.sdk.java.defaultimpl.DefaultConnection;

/**
 * {@link EnableAutoConfiguration Auto-configuration} for connect-sdk-java's
 * {@link PooledConnection}.
 *
 * @author Rob Spoor
 */
@Configuration
@ConditionalOnMissingBean(Connection.class)
@EnableConfigurationProperties(ConnectSdkProperties.class)
public class ConnectSdkConnectionAutoConfiguration {

    private final ConnectSdkProperties properties;

    @Autowired
    public ConnectSdkConnectionAutoConfiguration(ConnectSdkProperties properties) {
        this.properties = Objects.requireNonNull(properties);
    }

    @Bean(destroyMethod = "close")
    public PooledConnection connectSdkConnection() {
        int connectTimeout = properties.getConnectTimeout();
        int socketTimeout = properties.getSocketTimeout();
        int maxConnections = properties.getMaxConnections();

        ProxyConfiguration proxyConfiguration = getProxyConfiguration();
        Set httpsProtocols = getHttpsProtocols();

        return new DefaultConnection(connectTimeout, socketTimeout, maxConnections, proxyConfiguration, httpsProtocols);
    }

    private ProxyConfiguration getProxyConfiguration() {
        ConnectSdkProperties.Proxy proxy = properties.getProxy();
        if (proxy != null) {
            String uri = proxy.getUri();
            if (uri != null) {
                String username = proxy.getUsername();
                String password = proxy.getPassword();
                return new ProxyConfiguration(URI.create(uri), username, password);
            }
        }
        return null;
    }

    private Set getHttpsProtocols() {
        ConnectSdkProperties.HTTPS https = properties.getHttps();
        if (https != null) {
            List protocols = https.getProtocols();
            if (protocols != null) {
                return new LinkedHashSet<>(protocols);
            }
        }
        return null;
    }

    @Service
    @ConditionalOnProperty(name = "connect.api.close-idle-connections.enabled", havingValue = "true", matchIfMissing = true)
    @EnableScheduling
    static class ConnectionManager {

        private static final String INTERVAL = "${connect.api.close-idle-connections.interval:10000}";

        private final PooledConnection connection;
        private final long idleTime;

        ConnectionManager(PooledConnection connection, @Value("${connect.api.close-idle-connections.idle-time:20000}") long idleTime) {
            this.connection = Objects.requireNonNull(connection);
            this.idleTime = idleTime;
        }

        @Scheduled(fixedDelayString = INTERVAL, initialDelayString = INTERVAL)
        public void closeIdleAndExpiredConnections() {
            connection.closeIdleConnections(idleTime, TimeUnit.MILLISECONDS);
        }
    }
}