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/*************************************************************************
 *
 * ADOBE CONFIDENTIAL
 * ___________________
 *
 *  Copyright 2011 Adobe Systems Incorporated
 *  All Rights Reserved.
 *
 * NOTICE:  All information contained herein is, and remains
 * the property of Adobe Systems Incorporated and its suppliers,
 * if any.  The intellectual and technical concepts contained
 * herein are proprietary to Adobe Systems Incorporated and its
 * suppliers and are protected by trade secret or copyright law.
 * Dissemination of this information or reproduction of this material
 * is strictly forbidden unless prior written permission is obtained
 * from Adobe Systems Incorporated.
 **************************************************************************/
package com.adobe.granite.crx2oak;

import com.adobe.granite.crx2oak.cli.CRX2OakOption;
import com.adobe.granite.crx2oak.cli.CliTools;
import com.adobe.granite.crx2oak.cli.transformer.CommandLineTransformerEngine;
import com.adobe.granite.crx2oak.logging.LoggingLevelControllerFactory;
import com.adobe.granite.crx2oak.logging.RealSlf4jProvider;
import com.adobe.granite.crx2oak.model.Topics;
import com.adobe.granite.crx2oak.pipeline.PipeData;
import com.adobe.granite.crx2oak.pipeline.Pipeline;
import com.adobe.granite.crx2oak.pipeline.PipelineComponent;
import com.google.common.base.Optional;
import joptsimple.OptionParser;
import org.apache.jackrabbit.oak.upgrade.cli.parser.OptionParserFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

import static com.adobe.granite.crx2oak.CoreComponents.getCoreComponents;
import static com.adobe.granite.crx2oak.MigrationComponents.getMigrationComponents;
import static com.adobe.granite.crx2oak.pipeline.PipeData.put;
import static com.google.common.collect.Iterables.concat;

/**
 * The Java executable entry point (a.k.a application Main class).
 */
public class CRX2Oak {

    public static final Logger LOGGER = LoggerFactory.getLogger(CRX2Oak.class);

    public static void main(String... args) {
        processAppOutput(run(args));
    }

    /**
     * Able to invoke CRX2Oak without causing JVM termination in case the exit code needs to be returned.
     * Instead
     *
     * @param args command line argument
     * @return the pipe data that should contain exit code in a specific topic: {@linkplain Topics#EXIT_CODE}
     */
    public static PipeData run(final String[] args) {
        LOGGER.info("started with args: {}", Arrays.asList(args));
        final OptionParser parser = CRX2OakOption.passAllOptionsToParser(OptionParserFactory.create());

        final PipeData input = put(Topics.OPTION_PARSER, parser).put(Topics.CMD_LINE_ARGS, args).toPipe();
        return Pipeline.of(getAppComponents(parser)).run(input);
    }

    private static Iterable getAppComponents(final OptionParser parser) {
        final LoggingLevelControllerFactory logLevelCtrlFactory = new LoggingLevelControllerFactory(
                new RealSlf4jProvider());
        final CommandLineTransformerEngine cmdlineTransformer = CliTools.getCommandLineTransformerEngine();

        return concat(
                getCoreComponents(logLevelCtrlFactory, cmdlineTransformer, parser),
                getMigrationComponents(logLevelCtrlFactory, cmdlineTransformer)
        );
    }

    private static void processAppOutput(final PipeData output) {
        final Optional> optionalWarnings = output.get(Topics.WARNINGS);
        if (optionalWarnings.isPresent()) {
            outputWarnings(optionalWarnings.get());
        }

        final Optional exitCode = output.get(Topics.EXIT_CODE);
        if (exitCode.isPresent()) {
            System.exit(exitCode.get());
        }
    }

    private static void outputWarnings(final List strings) {
        for (String warning : strings) {
            System.out.println(warning);
            LOGGER.warn(warning);
        }
    }

}