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 * Copyright (c) 2012, 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
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package jdk.jpackage.internal;

import java.io.*;
import java.nio.file.Files;
import java.text.MessageFormat;
import java.util.*;

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

public class MacDmgBundler extends MacBaseInstallerBundler {

    private static final ResourceBundle I18N = ResourceBundle.getBundle(
            "jdk.jpackage.internal.resources.MacResources");

    static final String DEFAULT_BACKGROUND_IMAGE="background_dmg.png";
    static final String DEFAULT_DMG_SETUP_SCRIPT="DMGsetup.scpt";
    static final String TEMPLATE_BUNDLE_ICON = "java.icns";

    static final String DEFAULT_LICENSE_PLIST="lic_template.plist";

    public static final BundlerParamInfo<String> INSTALLER_SUFFIX =
            new StandardBundlerParam<> (
            "mac.dmg.installerName.suffix",
            String.class,
            params -> "",
            (s, p) -> s);

    public File bundle(Map<String, ? super Object> params,
            File outdir) throws PackagerException {
        Log.verbose(MessageFormat.format(I18N.getString("message.building-dmg"),
                APP_NAME.fetchFrom(params)));

        IOUtils.writableOutputDir(outdir.toPath());

        File appImageDir = APP_IMAGE_TEMP_ROOT.fetchFrom(params);
        try {
            appImageDir.mkdirs();

            if (prepareAppBundle(params) != null &&
                    prepareConfigFiles(params)) {
                File configScript = getConfig_Script(params);
                if (configScript.exists()) {
                    Log.verbose(MessageFormat.format(
                            I18N.getString("message.running-script"),
                            configScript.getAbsolutePath()));
                    IOUtils.run("bash", configScript);
                }

                return buildDMG(params, outdir);
            }
            return null;
        } catch (IOException ex) {
            Log.verbose(ex);
            throw new PackagerException(ex);
        }
    }

    private static final String hdiutil = "/usr/bin/hdiutil";

    private void prepareDMGSetupScript(String volumeName,
            Map<String, ? super Object> params) throws IOException {
        File dmgSetup = getConfig_VolumeScript(params);
        Log.verbose(MessageFormat.format(
                I18N.getString("message.preparing-dmg-setup"),
                dmgSetup.getAbsolutePath()));

        //prepare config for exe
        Map<String, String> data = new HashMap<>();
        data.put("DEPLOY_ACTUAL_VOLUME_NAME", volumeName);
        data.put("DEPLOY_APPLICATION_NAME", APP_NAME.fetchFrom(params));

        data.put("DEPLOY_INSTALL_LOCATION", "(path to desktop folder)");
        data.put("DEPLOY_INSTALL_NAME", "Desktop");

        try (Writer w = Files.newBufferedWriter(dmgSetup.toPath())) {
            w.write(preprocessTextResource(dmgSetup.getName(),
                    I18N.getString("resource.dmg-setup-script"),
                    DEFAULT_DMG_SETUP_SCRIPT, data, VERBOSE.fetchFrom(params),
                    RESOURCE_DIR.fetchFrom(params)));
        }
    }

    private File getConfig_VolumeScript(Map<String, ? super Object> params) {
        return new File(CONFIG_ROOT.fetchFrom(params),
                APP_NAME.fetchFrom(params) + "-dmg-setup.scpt");
    }

    private File getConfig_VolumeBackground(
            Map<String, ? super Object> params) {
        return new File(CONFIG_ROOT.fetchFrom(params),
                APP_NAME.fetchFrom(params) + "-background.png");
    }

    private File getConfig_VolumeIcon(Map<String, ? super Object> params) {
        return new File(CONFIG_ROOT.fetchFrom(params),
                APP_NAME.fetchFrom(params) + "-volume.icns");
    }

    private File getConfig_LicenseFile(Map<String, ? super Object> params) {
        return new File(CONFIG_ROOT.fetchFrom(params),
                APP_NAME.fetchFrom(params) + "-license.plist");
    }

    private void prepareLicense(Map<String, ? super Object> params) {
        try {
            String licFileStr = LICENSE_FILE.fetchFrom(params);
            if (licFileStr == null) {
                return;
            }

            File licFile = new File(licFileStr);
            byte[] licenseContentOriginal = Files.readAllBytes(licFile.toPath());
            String licenseInBase64 =
                    Base64.getEncoder().encodeToString(licenseContentOriginal);

            Map<String, String> data = new HashMap<>();
            data.put("APPLICATION_LICENSE_TEXT", licenseInBase64);

            try (Writer w = Files.newBufferedWriter(
                    getConfig_LicenseFile(params).toPath())) {
                w.write(preprocessTextResource(
                        getConfig_LicenseFile(params).getName(),
                        I18N.getString("resource.license-setup"),
                        DEFAULT_LICENSE_PLIST, data, VERBOSE.fetchFrom(params),
                        RESOURCE_DIR.fetchFrom(params)));
            }

        } catch (IOException ex) {
            Log.verbose(ex);
        }
    }

    private boolean prepareConfigFiles(Map<String, ? super Object> params)
            throws IOException {
        File bgTarget = getConfig_VolumeBackground(params);
        fetchResource(bgTarget.getName(),
                I18N.getString("resource.dmg-background"),
                DEFAULT_BACKGROUND_IMAGE,
                bgTarget,
                VERBOSE.fetchFrom(params),
                RESOURCE_DIR.fetchFrom(params));

        File iconTarget = getConfig_VolumeIcon(params);
        if (MacAppBundler.ICON_ICNS.fetchFrom(params) == null ||
                !MacAppBundler.ICON_ICNS.fetchFrom(params).exists()) {
            fetchResource(iconTarget.getName(),
                    I18N.getString("resource.volume-icon"),
                    TEMPLATE_BUNDLE_ICON,
                    iconTarget,
                    VERBOSE.fetchFrom(params),
                    RESOURCE_DIR.fetchFrom(params));
        } else {
            fetchResource(iconTarget.getName(),
                    I18N.getString("resource.volume-icon"),
                    MacAppBundler.ICON_ICNS.fetchFrom(params),
                    iconTarget,
                    VERBOSE.fetchFrom(params),
                    RESOURCE_DIR.fetchFrom(params));
        }


        fetchResource(getConfig_Script(params).getName(),
                I18N.getString("resource.post-install-script"),
                (String) null,
                getConfig_Script(params),
                VERBOSE.fetchFrom(params),
                RESOURCE_DIR.fetchFrom(params));

        prepareLicense(params);

        // In theory we need to extract name from results of attach command
        // However, this will be a problem for customization as name will
        // possibly change every time and developer will not be able to fix it
        // As we are using tmp dir chance we get "different" name are low =>
        // Use fixed name we used for bundle
        prepareDMGSetupScript(APP_NAME.fetchFrom(params), params);

        return true;
    }

    // name of post-image script
    private File getConfig_Script(Map<String, ? super Object> params) {
        return new File(CONFIG_ROOT.fetchFrom(params),
                APP_NAME.fetchFrom(params) + "-post-image.sh");
    }

    // Location of SetFile utility may be different depending on MacOS version
    // We look for several known places and if none of them work will
    // try ot find it
    private String findSetFileUtility() {
        String typicalPaths[] = {"/Developer/Tools/SetFile",
                "/usr/bin/SetFile", "/Developer/usr/bin/SetFile"};

        for (String path: typicalPaths) {
            File f = new File(path);
            if (f.exists() && f.canExecute()) {
                return path;
            }
        }

        // generic find attempt
        try {
            ProcessBuilder pb = new ProcessBuilder("xcrun", "-find", "SetFile");
            Process p = pb.start();
            InputStreamReader isr = new InputStreamReader(p.getInputStream());
            BufferedReader br = new BufferedReader(isr);
            String lineRead = br.readLine();
            if (lineRead != null) {
                File f = new File(lineRead);
                if (f.exists() && f.canExecute()) {
                    return f.getAbsolutePath();
                }
            }
        } catch (IOException ignored) {}

        return null;
    }

    private File buildDMG(
            Map<String, ? super Object> params, File outdir)
            throws IOException {
        File imagesRoot = IMAGES_ROOT.fetchFrom(params);
        if (!imagesRoot.exists()) imagesRoot.mkdirs();

        File protoDMG = new File(imagesRoot,
                APP_NAME.fetchFrom(params) +"-tmp.dmg");
        File finalDMG = new File(outdir, INSTALLER_NAME.fetchFrom(params)
                + INSTALLER_SUFFIX.fetchFrom(params) + ".dmg");

        File srcFolder = APP_IMAGE_TEMP_ROOT.fetchFrom(params);
        File predefinedImage =
                StandardBundlerParam.getPredefinedAppImage(params);
        if (predefinedImage != null) {
            srcFolder = predefinedImage;
        }

        Log.verbose(MessageFormat.format(I18N.getString(
                "message.creating-dmg-file"), finalDMG.getAbsolutePath()));

        protoDMG.delete();
        if (finalDMG.exists() && !finalDMG.delete()) {
            throw new IOException(MessageFormat.format(I18N.getString(
                    "message.dmg-cannot-be-overwritten"),
                    finalDMG.getAbsolutePath()));
        }

        protoDMG.getParentFile().mkdirs();
        finalDMG.getParentFile().mkdirs();

        String hdiUtilVerbosityFlag = VERBOSE.fetchFrom(params) ?
                "-verbose" : "-quiet";

        // create temp image
        ProcessBuilder pb = new ProcessBuilder(
                hdiutil,
                "create",
                hdiUtilVerbosityFlag,
                "-srcfolder", srcFolder.getAbsolutePath(),
                "-volname", APP_NAME.fetchFrom(params),
                "-ov", protoDMG.getAbsolutePath(),
                "-fs", "HFS+",
                "-format", "UDRW");
        IOUtils.exec(pb);

        // mount temp image
        pb = new ProcessBuilder(
                hdiutil,
                "attach",
                protoDMG.getAbsolutePath(),
                hdiUtilVerbosityFlag,
                "-mountroot", imagesRoot.getAbsolutePath());
        IOUtils.exec(pb);

        File mountedRoot = new File(imagesRoot.getAbsolutePath(),
                APP_NAME.fetchFrom(params));

        // volume icon
        File volumeIconFile = new File(mountedRoot, ".VolumeIcon.icns");
        IOUtils.copyFile(getConfig_VolumeIcon(params),
                volumeIconFile);

        pb = new ProcessBuilder("osascript",
                getConfig_VolumeScript(params).getAbsolutePath());
        IOUtils.exec(pb);

        // Indicate that we want a custom icon
        // NB: attributes of the root directory are ignored
        // when creating the volume
        // Therefore we have to do this after we mount image
        String setFileUtility = findSetFileUtility();
        if (setFileUtility != null) {
                //can not find utility => keep going without icon
            try {
                volumeIconFile.setWritable(true);
                // The "creator" attribute on a file is a legacy attribute
                // but it seems Finder excepts these bytes to be
                // "icnC" for the volume icon
                // http://endrift.com/blog/2010/06/14/dmg-files-volume-icons-cli
                // (might not work on Mac 10.13 with old XCode)
                pb = new ProcessBuilder(
                        setFileUtility,
                        "-c", "icnC",
                        volumeIconFile.getAbsolutePath());
                IOUtils.exec(pb);
                volumeIconFile.setReadOnly();

                pb = new ProcessBuilder(
                        setFileUtility,
                        "-a", "C",
                        mountedRoot.getAbsolutePath());
                IOUtils.exec(pb);
            } catch (IOException ex) {
                Log.error(ex.getMessage());
                Log.verbose("Cannot enable custom icon using SetFile utility");
            }
        } else {
            Log.verbose(
                "Skip enabling custom icon as SetFile utility is not found");
        }

        // Detach the temporary image
        pb = new ProcessBuilder(
                hdiutil,
                "detach",
                "-force",
                hdiUtilVerbosityFlag,
                mountedRoot.getAbsolutePath());
        IOUtils.exec(pb);

        // Compress it to a new image
        pb = new ProcessBuilder(
                hdiutil,
                "convert",
                protoDMG.getAbsolutePath(),
                hdiUtilVerbosityFlag,
                "-format", "UDZO",
                "-o", finalDMG.getAbsolutePath());
        IOUtils.exec(pb);

        //add license if needed
        if (getConfig_LicenseFile(params).exists()) {
            //hdiutil unflatten your_image_file.dmg
            pb = new ProcessBuilder(
                    hdiutil,
                    "unflatten",
                    finalDMG.getAbsolutePath()
            );
            IOUtils.exec(pb);

            //add license
            pb = new ProcessBuilder(
                    hdiutil,
                    "udifrez",
                    finalDMG.getAbsolutePath(),
                    "-xml",
                    getConfig_LicenseFile(params).getAbsolutePath()
            );
            IOUtils.exec(pb);

            //hdiutil flatten your_image_file.dmg
            pb = new ProcessBuilder(
                    hdiutil,
                    "flatten",
                    finalDMG.getAbsolutePath()
            );
            IOUtils.exec(pb);

        }

        //Delete the temporary image
        protoDMG.delete();

        Log.verbose(MessageFormat.format(I18N.getString(
                "message.output-to-location"),
                APP_NAME.fetchFrom(params), finalDMG.getAbsolutePath()));

        return finalDMG;
    }


    //////////////////////////////////////////////////////////////////////////
    // Implement Bundler
    //////////////////////////////////////////////////////////////////////////

    @Override
    public String getName() {
        return I18N.getString("dmg.bundler.name");
    }

    @Override
    public String getID() {
        return "dmg";
    }

    @Override
    public boolean validate(Map<String, ? super Object> params)
            throws ConfigException {
        try {
            if (params == null) throw new ConfigException(
                    I18N.getString("error.parameters-null"),
                    I18N.getString("error.parameters-null.advice"));

            //run basic validation to ensure requirements are met
            //we are not interested in return code, only possible exception
            validateAppImageAndBundeler(params);

            return true;
        } catch (RuntimeException re) {
            if (re.getCause() instanceof ConfigException) {
                throw (ConfigException) re.getCause();
            } else {
                throw new ConfigException(re);
            }
        }
    }

    @Override
    public File execute(Map<String, ? super Object> params,
            File outputParentDir) throws PackagerException {
        return bundle(params, outputParentDir);
    }

    @Override
    public boolean supported(boolean runtimeInstaller) {
        return isSupported();
    }

    public final static String[] required =
            {"/usr/bin/hdiutil", "/usr/bin/osascript"};
    public static boolean isSupported() {
        try {
            for (String s : required) {
                File f = new File(s);
                if (!f.exists() || !f.canExecute()) {
                    return false;
                }
            }
            return true;
        } catch (Exception e) {
            return false;
        }
    }
}