/*

 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package toolbox;

import java.io.File;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.stream.Collectors;

public class ModuleBuilder {

    private final ToolBox tb;

    private final String name;

    private String requires = "";

    private String exports = "";

    private String uses = "";

    private String provides = "";

    private String modulePath = "";

    private List<String> content = new ArrayList<>();

    public ModuleBuilder(ToolBox tb, String name) {

        this.tb = tb;

        this.name = name;

    }

    public ModuleBuilder requiresPublic(String requires, Path... modulePath) {

        return requires("public " + requires, modulePath);

    }

    public ModuleBuilder requires(String requires, Path... modulePath) {

        this.requires += "    requires " + requires + ";\n";

        this.modulePath += Arrays.stream(modulePath)

                .map(Path::toString)

                .collect(Collectors.joining(File.pathSeparator));

        return this;

    }

    public ModuleBuilder exportsTo(String pkg, String module) {

        return exports(pkg + " to " + module);

    }

    public ModuleBuilder exports(String pkg) {

        this.exports += "    exports " + pkg + ";\n";

        return this;

    }

    public ModuleBuilder uses(String uses) {

        this.uses += "    uses " + uses + ";\n";

        return this;

    }

    public ModuleBuilder provides(String service, String implementation) {

        this.provides += "    provides " + service + " with " + implementation + ";\n";

        return this;

    }

    public ModuleBuilder classes(String... content) {

        this.content.addAll(Arrays.asList(content));

        return this;

    }

    public Path write(Path where) throws IOException {

        Files.createDirectories(where);

        List<String> sources = new ArrayList<>();

        sources.add("module " + name + "{"

                + requires

                + exports

                + uses

                + provides

                + "}");

        sources.addAll(content);

        Path moduleSrc = where.resolve(name + "/src");

        tb.writeJavaFiles(moduleSrc, sources.toArray(new String[]{}));

        return moduleSrc;

    }

    public void build(Path where) throws IOException {

        Path moduleSrc = write(where);

        new JavacTask(tb)

                .outdir(where.resolve(name))

                .options("-mp", modulePath)

                .files(tb.findJavaFiles(moduleSrc))

                .run()

                .writeAll();

    }

}