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/**
 * The MIT License
 * Copyright © 2016 - 2017 WebFolder OÜ
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package io.webfolder.micro4j;

import static org.apache.maven.plugins.annotations.LifecyclePhase.PROCESS_RESOURCES;

import java.nio.file.Path;

import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugins.annotations.Component;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.project.MavenProject;
import org.sonatype.plexus.build.incremental.BuildContext;

@Mojo(name = "babel", defaultPhase = PROCESS_RESOURCES, threadSafe = true, requiresOnline = false, requiresReports = false)
public class BabelMojo extends BaseMojo {

    @Parameter(defaultValue = "**/*.jsx, **/*.es6, **/*.es7, **/*.es")
    private String[] babelIncludes = new String[] { "**/*.jsx", "**/*.es6", "**/*.es7", "**/*.es" };

    @Parameter
    private String[] babelExcludes;

    @Parameter(defaultValue = "${project.build.sourceEncoding}")
    private String babelEncoding = "utf-8";

    @Parameter(defaultValue = "js")
    private String babelOutputExtension;

    @Parameter(defaultValue = "['es2015', 'stage-3']")
    private String babelPresets;

    @Parameter(defaultValue = "babel-standalone-6.18.1.min.js")
    private String babelLocation;

    @Parameter(defaultValue = "${project}", readonly = true, required = true)
    private MavenProject project;

    @Component
    private BuildContext buildContext;

    @Override
    protected void init() throws MojoExecutionException {
    }

    @Override
    protected String getEncoding() {
        return babelEncoding;
    }

    @Override
    protected MavenProject getProject() {
        return project;
    }

    @Override
    protected String[] getIncludes() {
        return babelIncludes;
    }

    @Override
    protected String[] getExcludes() {
        return babelExcludes;
    }

    @Override
    protected BuildContext getBuildContext() {
        return buildContext;
    }

    @Override
    protected String getOutputExtension() {
        return babelOutputExtension;
    }

    @Override
    protected boolean supportsExtensionRenaming() {
        return true;
    }

    @Override
    protected String transform(Path srcFile, Path targetFile, String content) throws MojoExecutionException {
        buildContext.removeMessages(srcFile.toFile());
        JsEngine engine = new V8Engine(babelLocation, babelPresets);
        try {
            if (engine != null) {
                engine.init();
            }
            if ( engine == null || ! engine.isInitialized() ) {
                engine = new NashornEngine(babelLocation, babelPresets);
                engine.init();
            }
            return engine.execute(srcFile, content, buildContext);
        } finally {
            if (engine != null && engine.isInitialized()) {
                engine.dispose();
            }
        }
    }
}