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package org.apache.james.backend.rabbitmq;

import java.io.IOException;
import java.time.Duration;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import org.rnorth.ducttape.unreliables.Unreliables;
import org.testcontainers.containers.wait.strategy.WaitStrategy;
import org.testcontainers.containers.wait.strategy.WaitStrategyTarget;

import com.google.common.primitives.Ints;
import com.rabbitmq.client.Connection;

public class RabbitMQWaitStrategy implements WaitStrategy {

    private static final Duration DEFAULT_TIMEOUT = Duration.ofMinutes(1);

    public static RabbitMQWaitStrategy withDefaultTimeout(DockerRabbitMQ rabbitMQ) {
        return new RabbitMQWaitStrategy(rabbitMQ, DEFAULT_TIMEOUT);
    }

    private final DockerRabbitMQ rabbitMQ;
    private final Duration timeout;

    public RabbitMQWaitStrategy(DockerRabbitMQ rabbitMQ, Duration timeout) {
        this.rabbitMQ = rabbitMQ;
        this.timeout = timeout;
    }

    @Override
    public void waitUntilReady(WaitStrategyTarget waitStrategyTarget) {
        int seconds = Ints.checkedCast(this.timeout.getSeconds());

        Unreliables.retryUntilTrue(seconds, TimeUnit.SECONDS, this::isConnected);
    }

    private Boolean isConnected() throws IOException, TimeoutException {
        try (Connection connection = rabbitMQ.connectionFactory().newConnection()) {
            return connection.isOpen();
        }
    }

    @Override
    public WaitStrategy withStartupTimeout(Duration startupTimeout) {
        return new RabbitMQWaitStrategy(rabbitMQ, startupTimeout);
    }
}
