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package io.quarkus.devservices.db2.deployment;

import static io.quarkus.datasource.deployment.spi.DatabaseDefaultSetupConfig.DEFAULT_DATABASE_NAME;
import static io.quarkus.datasource.deployment.spi.DatabaseDefaultSetupConfig.DEFAULT_DATABASE_PASSWORD;
import static io.quarkus.datasource.deployment.spi.DatabaseDefaultSetupConfig.DEFAULT_DATABASE_USERNAME;

import java.time.Duration;
import java.util.List;
import java.util.Optional;
import java.util.OptionalInt;

import org.jboss.logging.Logger;
import org.testcontainers.containers.Db2Container;
import org.testcontainers.utility.DockerImageName;

import io.quarkus.datasource.common.runtime.DataSourceUtil;
import io.quarkus.datasource.common.runtime.DatabaseKind;
import io.quarkus.datasource.deployment.spi.DevServicesDatasourceContainerConfig;
import io.quarkus.datasource.deployment.spi.DevServicesDatasourceProvider;
import io.quarkus.datasource.deployment.spi.DevServicesDatasourceProviderBuildItem;
import io.quarkus.deployment.annotations.BuildStep;
import io.quarkus.deployment.builditem.DevServicesSharedNetworkBuildItem;
import io.quarkus.deployment.dev.devservices.GlobalDevServicesConfig;
import io.quarkus.devservices.common.ConfigureUtil;
import io.quarkus.devservices.common.ContainerShutdownCloseable;
import io.quarkus.devservices.common.JBossLoggingConsumer;
import io.quarkus.devservices.common.Labels;
import io.quarkus.devservices.common.Volumes;
import io.quarkus.runtime.LaunchMode;

public class DB2DevServicesProcessor {

    private static final Logger LOG = Logger.getLogger(DB2DevServicesProcessor.class);

    @BuildStep
    DevServicesDatasourceProviderBuildItem setupDB2(
            List devServicesSharedNetworkBuildItem,
            GlobalDevServicesConfig globalDevServicesConfig) {
        return new DevServicesDatasourceProviderBuildItem(DatabaseKind.DB2, new DevServicesDatasourceProvider() {
            @Override
            public RunningDevServicesDatasource startDatabase(Optional username, Optional password,
                    String datasourceName, DevServicesDatasourceContainerConfig containerConfig,
                    LaunchMode launchMode, Optional startupTimeout) {

                boolean useSharedNetwork = DevServicesSharedNetworkBuildItem.isSharedNetworkRequired(globalDevServicesConfig,
                        devServicesSharedNetworkBuildItem);
                QuarkusDb2Container container = new QuarkusDb2Container(containerConfig.getImageName(),
                        containerConfig.getFixedExposedPort(),
                        useSharedNetwork);
                startupTimeout.ifPresent(container::withStartupTimeout);

                String effectiveUsername = containerConfig.getUsername().orElse(username.orElse(DEFAULT_DATABASE_USERNAME));
                String effectivePassword = containerConfig.getPassword().orElse(password.orElse(DEFAULT_DATABASE_PASSWORD));
                String effectiveDbName = containerConfig.getDbName().orElse(
                        DataSourceUtil.isDefault(datasourceName) ? DEFAULT_DATABASE_NAME : datasourceName);

                container.withUsername(effectiveUsername)
                        .withPassword(effectivePassword)
                        .withDatabaseName(effectiveDbName)
                        .withReuse(containerConfig.isReuse());
                Labels.addDataSourceLabel(container, datasourceName);
                Volumes.addVolumes(container, containerConfig.getVolumes());

                container.withEnv(containerConfig.getContainerEnv());

                containerConfig.getAdditionalJdbcUrlProperties().forEach(container::withUrlParam);
                containerConfig.getCommand().ifPresent(container::setCommand);
                containerConfig.getInitScriptPath().ifPresent(container::withInitScript);
                if (containerConfig.isShowLogs()) {
                    container.withLogConsumer(new JBossLoggingConsumer(LOG));
                }
                container.start();

                LOG.info("Dev Services for IBM Db2 started.");

                return new RunningDevServicesDatasource(container.getContainerId(),
                        container.getEffectiveJdbcUrl(),
                        container.getReactiveUrl(),
                        container.getUsername(),
                        container.getPassword(),
                        new ContainerShutdownCloseable(container, "IBM Db2"));
            }
        });
    }

    private static class QuarkusDb2Container extends Db2Container {
        private final OptionalInt fixedExposedPort;
        private final boolean useSharedNetwork;

        private String hostName = null;

        public QuarkusDb2Container(Optional imageName, OptionalInt fixedExposedPort, boolean useSharedNetwork) {
            super(DockerImageName.parse(imageName.orElseGet(() -> ConfigureUtil.getDefaultImageNameFor("db2")))
                    .asCompatibleSubstituteFor(DockerImageName.parse("icr.io/db2_community/db2")));
            this.fixedExposedPort = fixedExposedPort;
            this.useSharedNetwork = useSharedNetwork;
        }

        @Override
        protected void configure() {
            super.configure();

            if (useSharedNetwork) {
                hostName = ConfigureUtil.configureSharedNetwork(this, "db2");
                return;
            }

            if (fixedExposedPort.isPresent()) {
                addFixedExposedPort(fixedExposedPort.getAsInt(), DB2_PORT);
            } else {
                addExposedPorts(DB2_PORT);
            }
        }

        // this is meant to be called by Quarkus code and is not strictly needed
        // in the DB2 case as testcontainers does not try to establish
        // a connection to determine if the container is ready, but we do it anyway to be consistent across
        // DB containers
        public String getEffectiveJdbcUrl() {
            if (useSharedNetwork) {
                // in this case we expose the URL using the network alias we created in 'configure'
                // and the container port since the application communicating with this container
                // won't be doing port mapping
                String additionalUrlParams = constructUrlParameters(":", ";", ";");
                return "jdbc:db2://" + hostName + ":" + DB2_PORT + "/" + getDatabaseName() + additionalUrlParams;
            } else {
                return super.getJdbcUrl();
            }
        }

        public String getReactiveUrl() {
            return getEffectiveJdbcUrl().replaceFirst("jdbc:", "vertx-reactive:");
        }
    }
}