/*

 * 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.

 *

 * 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.test;

import java.io.File;

import java.nio.file.Path;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.function.BiConsumer;

import java.util.function.Consumer;

import java.util.function.Supplier;

import java.util.stream.Collectors;

import java.util.stream.Stream;

/**

 * Instance of PackageTest is for configuring and running a single jpackage

 * command to produce platform specific package bundle.

 *

 * Provides methods hook up custom configuration of jpackage command and

 * verification of the output bundle.

 */

public final class PackageTest {

    /**

     * Default test configuration for jpackage command. Default jpackage command

     * initialization includes:

     * <li>Set --input and --output parameters.

     * <li>Set --name parameter. Value of the parameter is the name of the first

     * class with main function found in the callers stack. Defaults can be

     * overridden with custom initializers set with subsequent addInitializer()

     * function calls.

     */

    public PackageTest() {

        action = DEFAULT_ACTION;

        forTypes();

        setJPackageExitCode(0);

        handlers = new HashMap<>();

        currentTypes.forEach(v -> handlers.put(v, new Handler(v)));

    }

    public PackageTest forTypes(PackageType... types) {

        Collection<PackageType> newTypes;

        if (types == null || types.length == 0) {

            newTypes = PackageType.NATIVE;

        } else {

            newTypes = Set.of(types);

        }

        currentTypes = newTypes.stream().filter(type -> type.isSupported()).collect(

                Collectors.toUnmodifiableSet());

        return this;

    }

    public PackageTest forTypes(Collection<PackageType> types) {

        return forTypes(types.toArray(PackageType[]::new));

    }

    public PackageTest setJPackageExitCode(int v) {

        expectedJPackageExitCode = 0;

        return this;

    }

    public PackageTest addInitializer(Consumer<JPackageCommand> v) {

        currentTypes.stream().forEach(type -> handlers.get(type).addInitializer(

                v));

        return this;

    }

    public PackageTest addBundleVerifier(

            BiConsumer<JPackageCommand, Executor.Result> v) {

        currentTypes.stream().forEach(

                type -> handlers.get(type).addBundleVerifier(v));

        return this;

    }

    public PackageTest addBundleVerifier(Consumer<JPackageCommand> v) {

        return addBundleVerifier((cmd, unused) -> v.accept(cmd));

    }

    public PackageTest addBundlePropertyVerifier(String propertyName,

            BiConsumer<String, String> pred) {

        return addBundleVerifier(cmd -> {

            String propertyValue = null;

            switch (cmd.packageType()) {

                case LINUX_DEB:

                    propertyValue = LinuxHelper.getDebBundleProperty(

                            cmd.outputBundle(), propertyName);

                    break;

                case LINUX_RPM:

                    propertyValue = LinuxHelper.geRpmBundleProperty(

                            cmd.outputBundle(), propertyName);

                    break;

                default:

                    throw new UnsupportedOperationException();

            }

            pred.accept(propertyName, propertyValue);

        });

    }

    public PackageTest addBundlePropertyVerifier(String propertyName,

            String expectedPropertyValue) {

        return addBundlePropertyVerifier(propertyName, (unused, v) -> {

            Test.assertEquals(expectedPropertyValue, v, String.format(

                    "Check value of %s property is [%s]", propertyName, v));

        });

    }

    public PackageTest addInstallVerifier(Consumer<JPackageCommand> v) {

        currentTypes.stream().forEach(

                type -> handlers.get(type).addInstallVerifier(v));

        return this;

    }

    public PackageTest addUninstallVerifier(Consumer<JPackageCommand> v) {

        currentTypes.stream().forEach(

                type -> handlers.get(type).addUninstallVerifier(v));

        return this;

    }

    public PackageTest configureHelloApp() {

        addInitializer(cmd -> HelloApp.addTo(cmd));

        addInstallVerifier(cmd -> HelloApp.executeAndVerifyOutput(

                cmd.launcherInstallationPath(), cmd.getAllArgumentValues(

                "--arguments")));

        return this;

    }

    public void run() {

        List<Handler> supportedHandlers = handlers.values().stream()

                .filter(entry -> !entry.isVoid())

                .collect(Collectors.toList());

        if (supportedHandlers.isEmpty()) {

            // No handlers with initializers found. Nothing to do.

            return;

        }

        Supplier<JPackageCommand> initializer = new Supplier<>() {

            @Override

            public JPackageCommand get() {

                JPackageCommand cmd = new JPackageCommand().setDefaultInputOutput();

                if (bundleOutputDir != null) {

                    cmd.setArgumentValue("--output", bundleOutputDir.toString());

                }

                cmd.setDefaultAppName();

                return cmd;

            }

        };

        supportedHandlers.forEach(handler -> handler.accept(initializer.get()));

    }

    public PackageTest setAction(Action value) {

        action = value;

        return this;

    }

    public Action getAction() {

        return action;

    }

    private class Handler implements Consumer<JPackageCommand> {

        Handler(PackageType type) {

            if (!PackageType.NATIVE.contains(type)) {

                throw new IllegalArgumentException(

                        "Attempt to configure a test for image packaging");

            }

            this.type = type;

            initializers = new ArrayList<>();

            bundleVerifiers = new ArrayList<>();

            installVerifiers = new ArrayList<>();

            uninstallVerifiers = new ArrayList<>();

        }

        boolean isVoid() {

            return initializers.isEmpty();

        }

        void addInitializer(Consumer<JPackageCommand> v) {

            initializers.add(v);

        }

        void addBundleVerifier(BiConsumer<JPackageCommand, Executor.Result> v) {

            bundleVerifiers.add(v);

        }

        void addInstallVerifier(Consumer<JPackageCommand> v) {

            installVerifiers.add(v);

        }

        void addUninstallVerifier(Consumer<JPackageCommand> v) {

            uninstallVerifiers.add(v);

        }

        @Override

        public void accept(JPackageCommand cmd) {

            type.applyTo(cmd);

            initializers.stream().forEach(v -> v.accept(cmd));

            switch (action) {

                case CREATE:

                    Executor.Result result = cmd.execute();

                    result.assertExitCodeIs(expectedJPackageExitCode);

                    Test.assertFileExists(cmd.outputBundle(),

                            expectedJPackageExitCode == 0);

                    verifyPackageBundle(JPackageCommand.createImmutable(cmd),

                            result);

                    break;

                case VERIFY_INSTALLED:

                    verifyPackageInstalled(JPackageCommand.createImmutable(cmd));

                    break;

                case VERIFY_UNINSTALLED:

                    verifyPackageUninstalled(

                            JPackageCommand.createImmutable(cmd));

                    break;

            }

        }

        private void verifyPackageBundle(JPackageCommand cmd,

                Executor.Result result) {

            bundleVerifiers.stream().forEach(v -> v.accept(cmd, result));

        }

        private void verifyPackageInstalled(JPackageCommand cmd) {

            Test.trace(String.format("Verify installed: %s",

                    cmd.getPrintableCommandLine()));

            if (cmd.isRuntime()) {

                Test.assertDirectoryExists(

                        cmd.appInstallationDirectory().resolve("runtime"), false);

                Test.assertDirectoryExists(

                        cmd.appInstallationDirectory().resolve("app"), false);

            }

            Test.assertExecutableFileExists(cmd.launcherInstallationPath(),

                    !cmd.isRuntime());

            if (PackageType.WINDOWS.contains(cmd.packageType())) {

                new WindowsHelper.AppVerifier(cmd);

            }

            installVerifiers.stream().forEach(v -> v.accept(cmd));

        }

        private void verifyPackageUninstalled(JPackageCommand cmd) {

            Test.trace(String.format("Verify uninstalled: %s",

                    cmd.getPrintableCommandLine()));

            if (!cmd.isRuntime()) {

                Test.assertFileExists(cmd.launcherInstallationPath(), false);

                Test.assertDirectoryExists(cmd.appInstallationDirectory(), false);

            }

            if (PackageType.WINDOWS.contains(cmd.packageType())) {

                new WindowsHelper.AppVerifier(cmd);

            }

            uninstallVerifiers.stream().forEach(v -> v.accept(cmd));

        }

        private final PackageType type;

        private final List<Consumer<JPackageCommand>> initializers;

        private final List<BiConsumer<JPackageCommand, Executor.Result>> bundleVerifiers;

        private final List<Consumer<JPackageCommand>> installVerifiers;

        private final List<Consumer<JPackageCommand>> uninstallVerifiers;

    }

    private Collection<PackageType> currentTypes;

    private int expectedJPackageExitCode;

    private Map<PackageType, Handler> handlers;

    private Action action;

    /**

     * Test action.

     */

    static public enum Action {

        /**

         * Create bundle.

         */

        CREATE,

        /**

         * Verify bundle installed.

         */

        VERIFY_INSTALLED,

        /**

         * Verify bundle uninstalled.

         */

        VERIFY_UNINSTALLED

    };

    private final static Action DEFAULT_ACTION;

    private final static File bundleOutputDir;

    static {

        final String JPACKAGE_TEST_OUTPUT = "jpackage.test.output";

        String val = System.getProperty(JPACKAGE_TEST_OUTPUT);

        if (val == null) {

            bundleOutputDir = null;

        } else {

            bundleOutputDir = new File(val).getAbsoluteFile();

            Test.assertTrue(bundleOutputDir.isDirectory(), String.format(

                    "Check value of %s property [%s] references a directory",

                    JPACKAGE_TEST_OUTPUT, bundleOutputDir));

            Test.assertTrue(bundleOutputDir.canWrite(), String.format(

                    "Check value of %s property [%s] references writable directory",

                    JPACKAGE_TEST_OUTPUT, bundleOutputDir));

        }

    }

    static {

        if (System.getProperty("jpackage.verify.install") != null) {

            DEFAULT_ACTION = Action.VERIFY_INSTALLED;

        } else if (System.getProperty("jpackage.verify.uninstall") != null) {

            DEFAULT_ACTION = Action.VERIFY_UNINSTALLED;

        } else {

            DEFAULT_ACTION = Action.CREATE;

        }

    }

}