/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.kylin.tool.upgrade;

import static org.apache.kylin.tool.util.MetadataUtil.getMetadataUrl;
import static org.apache.kylin.tool.util.ScreenPrintUtil.printlnGreen;
import static org.apache.kylin.tool.util.ScreenPrintUtil.printlnRed;
import static org.apache.kylin.tool.util.ScreenPrintUtil.systemExitWhenMainThread;

import java.util.Arrays;
import java.util.List;
import java.util.Locale;

import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.kylin.common.KylinConfig;
import org.apache.kylin.common.util.ExecutableApplication;
import org.apache.kylin.common.util.OptionBuilder;
import org.apache.kylin.common.util.OptionsHelper;
import org.apache.kylin.guava30.shaded.common.base.Preconditions;
import org.apache.kylin.guava30.shaded.common.collect.Lists;
import org.apache.kylin.metadata.project.ProjectInstance;

import lombok.extern.slf4j.Slf4j;

/**
 * 4.1 -> 4.2
 */
@Slf4j
public class CheckProjectModeCLI extends ExecutableApplication {

    private static final Option OPTION_METADATA_DIR = OptionBuilder.getInstance().hasArg().withArgName("metadata_dir")
            .withDescription("metadata dir.").isRequired(true).withLongOpt("metadata_dir").create("d");

    private static final Option OPTION_EXEC = OptionBuilder.getInstance().hasArg(false).withArgName("exec")
            .withDescription("exec the upgrade.").isRequired(false).withLongOpt("exec").create("e");

    public static void main(String[] args) {
        CheckProjectModeCLI updateProjectModelCLI = new CheckProjectModeCLI();
        try {
            updateProjectModelCLI.execute(args);
        } catch (RuntimeException e) {
            log.error("Failed to exec CheckProjectModeCLI", e);
            systemExitWhenMainThread(1);
        }

        log.info("Upgrade project mode finished!");
        systemExitWhenMainThread(0);
    }

    @Override
    protected Options getOptions() {
        Options options = new Options();
        options.addOption(OPTION_METADATA_DIR);
        options.addOption(OPTION_EXEC);
        return options;
    }

    @Override
    protected void execute(OptionsHelper optionsHelper) throws Exception {
        String metadataUrl = getMetadataUrl(optionsHelper.getOptionValue(OPTION_METADATA_DIR));
        Preconditions.checkArgument(StringUtils.isNotBlank(metadataUrl));

        KylinConfig systemKylinConfig = KylinConfig.getInstanceFromEnv();
        systemKylinConfig.setMetadataUrl(metadataUrl);

        List<ProjectInstance> projectInstanceList = Lists.newArrayList();
        if (CollectionUtils.isNotEmpty(projectInstanceList)) {
            printlnRed(String.format(Locale.ROOT, "found %d projects %s need to be changed to AI augmented mode.",
                    projectInstanceList.size(),
                    Arrays.toString(projectInstanceList.stream().map(ProjectInstance::getName).toArray())));

            if (optionsHelper.hasOption(OPTION_EXEC)) {
                throw new RuntimeException("Smart mode project exist, stop upgrade.");
            }
        } else {
            printlnGreen("found 0 projects need to be changed.");
            if (optionsHelper.hasOption(OPTION_EXEC)) {
                printlnGreen("projects mode upgrade succeeded.");
            }
        }
        log.info("Succeed to check project mode.");
    }
}
