/*

 * Copyright (c) 2019, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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 jdk.jpackage.internal;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.Map;

import java.util.Objects;

import java.util.Optional;

import static jdk.jpackage.internal.OverridableResource.createResource;

import static jdk.jpackage.internal.StandardBundlerParam.APP_NAME;

import static jdk.jpackage.internal.StandardBundlerParam.CONFIG_ROOT;

/**

 * Runs custom script from resource directory.

 */

class ScriptRunner {

    ScriptRunner() {

        environment = new ProcessBuilder().environment();

    }

    ScriptRunner setResourceCategoryId(String v) {

        resourceCategoryId = v;

        return this;

    }

    ScriptRunner setDirectory(Path v) {

        directory = v;

        return this;

    }

    ScriptRunner setScriptNameSuffix(String v) {

        scriptNameSuffix = v;

        return this;

    }

    ScriptRunner addEnvironment(Map<String, String> v) {

        environment.putAll(v);

        return this;

    }

    ScriptRunner setEnvironmentVariable(String envVarName, String envVarValue) {

        Objects.requireNonNull(envVarName);

        if (envVarValue == null) {

            environment.remove(envVarName);

        } else {

            environment.put(envVarName, envVarValue);

        }

        return this;

    }

    public void run(Map<String, ? super Object> params) throws IOException {

        String scriptName = String.format("%s-%s%s", APP_NAME.fetchFrom(params),

                scriptNameSuffix, scriptSuffix());

        Path scriptPath = CONFIG_ROOT.fetchFrom(params).toPath().resolve(

                scriptName);

        createResource(null, params)

                .setCategory(I18N.getString(resourceCategoryId))

                .saveToFile(scriptPath);

        if (!Files.exists(scriptPath)) {

            return;

        }

        ProcessBuilder pb = new ProcessBuilder(shell(),

                scriptPath.toAbsolutePath().toString());

        Map<String, String> workEnvironment = pb.environment();

        workEnvironment.clear();

        workEnvironment.putAll(environment);

        if (directory != null) {

            pb.directory(directory.toFile());

        }

        Executor.of(pb).executeExpectSuccess();

    }

    private static String shell() {

        if (Platform.isWindows()) {

            return "cscript";

        }

        return Optional.ofNullable(System.getenv("SHELL")).orElseGet(() -> "sh");

    }

    private static String scriptSuffix() {

        if (Platform.isWindows()) {

            return ".wsf";

        }

        return ".sh";

    }

    private String scriptNameSuffix;

    private String resourceCategoryId;

    private Path directory;

    private Map<String, String> environment;

}