/*

 * 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.Path;

import java.text.MessageFormat;

import java.util.*;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import java.util.stream.Collectors;

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

import static jdk.jpackage.internal.LinuxAppBundler.LINUX_INSTALL_DIR;

/**

 * There are two command line options to configure license information for RPM

 * packaging: --linux-rpm-license-type and --license-file. Value of

 * --linux-rpm-license-type command line option configures "License:" section

 * of RPM spec. Value of --license-file command line option specifies a license

 * file to be added to the package. License file is a sort of documentation file

 * but it will be installed even if user selects an option to install the

 * package without documentation. --linux-rpm-license-type is the primary option

 * to set license information. --license-file makes little sense in case of RPM

 * packaging.

 */

public class LinuxRpmBundler extends LinuxPackageBundler {

    // Fedora rules for package naming are used here

    // https://fedoraproject.org/wiki/Packaging:NamingGuidelines?rd=Packaging/NamingGuidelines

    //

    // all Fedora packages must be named using only the following ASCII

    // characters. These characters are displayed here:

    //

    // abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._+

    //

    private static final Pattern RPM_PACKAGE_NAME_PATTERN =

            Pattern.compile("[a-z\\d\\+\\-\\.\\_]+", Pattern.CASE_INSENSITIVE);

    public static final BundlerParamInfo<String> PACKAGE_NAME =

            new StandardBundlerParam<> (

            Arguments.CLIOptions.LINUX_BUNDLE_NAME.getId(),

            String.class,

            params -> {

                String nm = APP_NAME.fetchFrom(params);

                if (nm == null) return null;

                // make sure to lower case and spaces become dashes

                nm = nm.toLowerCase().replaceAll("[ ]", "-");

                return nm;

            },

            (s, p) -> {

                if (!RPM_PACKAGE_NAME_PATTERN.matcher(s).matches()) {

                    String msgKey = "error.invalid-value-for-package-name";

                    throw new IllegalArgumentException(

                            new ConfigException(MessageFormat.format(

                                    I18N.getString(msgKey), s),

                                    I18N.getString(msgKey + ".advice")));

                }

                return s;

            }

        );

    public static final BundlerParamInfo<String> LICENSE_TYPE =

        new StandardBundlerParam<>(

                Arguments.CLIOptions.LINUX_RPM_LICENSE_TYPE.getId(),

                String.class,

                params -> I18N.getString("param.license-type.default"),

                (s, p) -> s

        );

    public static final BundlerParamInfo<String> GROUP =

            new StandardBundlerParam<>(

            Arguments.CLIOptions.LINUX_CATEGORY.getId(),

            String.class,

            params -> null,

            (s, p) -> s);

    private final static String DEFAULT_SPEC_TEMPLATE = "template.spec";

    public final static String TOOL_RPM = "rpm";

    public final static String TOOL_RPMBUILD = "rpmbuild";

    public final static String TOOL_RPMBUILD_MIN_VERSION = "4.0";

    public LinuxRpmBundler() {

        super(PACKAGE_NAME);

    }

    @Override

    public void doValidate(Map<String, ? super Object> params)

            throws ConfigException {

    }

    private static ToolValidator createRpmbuildToolValidator() {

        Pattern pattern = Pattern.compile(" (\\d+\\.\\d+)");

        return new ToolValidator(TOOL_RPMBUILD).setMinimalVersion(

                TOOL_RPMBUILD_MIN_VERSION).setVersionParser(lines -> {

                    String versionString = lines.limit(1).collect(

                            Collectors.toList()).get(0);

                    Matcher matcher = pattern.matcher(versionString);

                    if (matcher.find()) {

                        return matcher.group(1);

                    }

                    return null;

                });

    }

    @Override

    protected List<ToolValidator> getToolValidators(

            Map<String, ? super Object> params) {

        return List.of(createRpmbuildToolValidator());

    }

    @Override

    protected File buildPackageBundle(

            Map<String, String> replacementData,

            Map<String, ? super Object> params, File outputParentDir) throws

            PackagerException, IOException {

        Path specFile = specFile(params);

        // prepare spec file

        return buildRPM(params, outputParentDir);

    }

    @Override

    protected Map<String, String> createReplacementData(

            Map<String, ? super Object> params) throws IOException {

        Map<String, String> data = new HashMap<>();

        data.put("APPLICATION_DIRECTORY", Path.of(LINUX_INSTALL_DIR.fetchFrom(

                params), PACKAGE_NAME.fetchFrom(params)).toString());

        data.put("APPLICATION_SUMMARY", APP_NAME.fetchFrom(params));

        data.put("APPLICATION_LICENSE_TYPE", LICENSE_TYPE.fetchFrom(params));

        String licenseFile = LICENSE_FILE.fetchFrom(params);

            licenseFile = Path.of(licenseFile).toAbsolutePath().normalize().toString();

        }

        data.put("APPLICATION_LICENSE_FILE", licenseFile);

        return data;

    }

    @Override

    protected void initLibProvidersLookup(

            Map<String, ? super Object> params,

            LibProvidersLookup libProvidersLookup) {

        libProvidersLookup.setPackageLookup(file -> {

            return Executor.of(TOOL_RPM,

                "-q", "--queryformat", "%{name}\\n",

                "-q", "--whatprovides", file.toString())

                .saveOutput(true).executeExpectSuccess().getOutput().stream();

        });

    }

    private Path specFile(Map<String, ? super Object> params) {

        return TEMP_ROOT.fetchFrom(params).toPath().resolve(Path.of("SPECS",

                PACKAGE_NAME.fetchFrom(params) + ".spec"));

    }

    private File buildRPM(Map<String, ? super Object> params,

            File outdir) throws IOException {

        Log.verbose(MessageFormat.format(I18N.getString(

                "message.outputting-bundle-location"),

                outdir.getAbsolutePath()));

        PlatformPackage thePackage = createMetaPackage(params);

        //run rpmbuild

        Executor.of(

                TOOL_RPMBUILD,

                "-bb", specFile(params).toAbsolutePath().toString(),

                "--define", String.format("%%_sourcedir %s",

                        thePackage.sourceRoot()),

                // save result to output dir

                "--define", String.format("%%_rpmdir %s",

                        outdir.getAbsolutePath()),

                // do not use other system directories to build as current user

                "--define", String.format("%%_topdir %s",

                        TEMP_ROOT.fetchFrom(params).toPath().toAbsolutePath())

        ).executeExpectSuccess();

        Log.verbose(MessageFormat.format(

                I18N.getString("message.output-bundle-location"),

                outdir.getAbsolutePath()));

        // presume the result is the ".rpm" file with the newest modified time

        // not the best solution, but it is the most reliable

        File result = null;

        long lastModified = 0;

        File[] list = outdir.listFiles();

        if (list != null) {

            for (File f : list) {

                if (f.getName().endsWith(".rpm") &&

                        f.lastModified() > lastModified) {

                    result = f;

                    lastModified = f.lastModified();

                }

            }

        }

        return result;

    }

    @Override

    public String getName() {

        return I18N.getString("rpm.bundler.name");

    }

    @Override

    public String getID() {

        return "rpm";

    }

    @Override

    public boolean supported(boolean runtimeInstaller) {

        return Platform.isLinux() && (createRpmbuildToolValidator().validate() == null);

    }

    @Override

    public boolean isDefault() {

        return !LinuxDebBundler.isDebian();

    }

}