/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016-2023 Objectionary.com
 *
 * 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 NON-INFRINGEMENT. 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 org.eolang.maven;

import com.jcabi.log.Logger;
import com.jcabi.xml.XML;
import com.jcabi.xml.XMLDocument;
import java.io.IOException;
import java.nio.file.Path;
import java.util.Collection;
import java.util.List;
import org.cactoos.text.Joined;
import org.eolang.maven.footprint.Footprint;
import org.eolang.maven.footprint.FtDefault;
import org.eolang.maven.util.Rel;

/**
 * Java files from XMIR.
 * @since 1.0
 */
final class JavaFiles {

    /**
     * Path to XMIR file.
     */
    private final Path source;

    /**
     * Base destination path.
     */
    private final Path dest;

    /**
     * Footprint.
     */
    private final Footprint footprint;

    /**
     * Ctor.
     *
     * @param src XML with java code
     * @param target Base destination path
     */
    JavaFiles(final Path src, final Path target) {
        this.source = src;
        this.dest = target;
        this.footprint = new FtDefault(target);
    }

    /**
     * Save java files.
     * @return List of saved java files
     * @throws IOException In case issues with I/O
     */
    public List<Path> save() throws IOException {
        final Collection<XML> nodes = new XMLDocument(this.source)
            .nodes("//class[java and not(@atom)]");
        final String ext = "java";
        for (final XML java : nodes) {
            this.footprint.save(
                java.xpath("@java-name").get(0),
                ext,
                new Joined("", java.xpath("java/text()"))::asString
            );
        }
        if (nodes.isEmpty()) {
            Logger.debug(
                this, "No .java files generated from %s",
                new Rel(this.source)
            );
        } else {
            Logger.info(
                this, "Generated %d .java file(s) from %s to %s",
                nodes.size(), new Rel(this.source), new Rel(this.dest)
            );
        }
        return this.footprint.list(ext);
    }
}
