/*

 * Copyright (c) 2014, 2018, 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.

 */

#include "Platform.h"

#include "PlatformString.h"

#include "FilePath.h"

#include "PropertyFile.h"

#include "JavaVirtualMachine.h"

#include "Package.h"

#include "PlatformThread.h"

#include "Macros.h"

#include "Messages.h"

#ifdef WINDOWS

#include <Shellapi.h>

#endif

#include <stdio.h>

#include <signal.h>

#include <stdlib.h>

/*

This is the launcher program for application packaging on Windows, Mac and Linux.

Basic approach:

  - Launcher executable loads packager.dll/libpackager.dylib/libpackager.so and calls start_launcher below.

  - Reads app/package.cfg or Info.plist or app/<appname>.cfg for application launch configuration

     (package.cfg is property file).

  - Load JVM with requested JVM settings (bundled client JVM if availble, server or installed JVM otherwise).

  - Wait for JVM to exit and then exit from Main

  - To debug application by passing command line argument.

  - Application folder is added to the library path (so LoadLibrary()) works.

Limitations and future work:

  - Running Java code in primordial thread may cause problems

    (example: can not use custom stack size).

    Solution used by java launcher is to create a new thread to invoke JVM.

    See CR 6316197 for more information.

*/

extern "C" {

#ifdef WINDOWS

    BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) {

        return true;

    }

        bool result = false;

        bool parentProcess = true;

        // Platform must be initialize first.

        Platform& platform = Platform::GetInstance();

        try {

            for (int index = 0; index < argc; index++) {

                TString argument = argv[index];

                if (argument == _T("-Xappcds:generatecache")) {

                    platform.SetAppCDSState(cdsGenCache);

                }

                else if (argument == _T("-Xappcds:off")) {

                    platform.SetAppCDSState(cdsDisabled);

                }

                else if (argument == _T("-Xapp:child")) {

                    parentProcess = false;

                }

#ifdef DEBUG

                // There is a compiler bug on Mac when overloading ShowResponseMessage.

                else if (argument == _T("-nativedebug")) {

                    if (platform.ShowResponseMessage(_T("Test"),

                                                     TString(_T("Would you like to debug?\n\nProcessID: ")) +

                                                     PlatformString(platform.GetProcessID()).toString()) == mrOK) {

                        while (platform.IsNativeDebuggerPresent() == false) {

                        }

                    }

                }

#endif //DEBUG

            }

            // Package must be initialized after Platform is fully initialized.

            Package& package = Package::GetInstance();

            Macros::Initialize();

            package.SetCommandLineArguments(argc, argv);

            platform.SetCurrentDirectory(package.GetPackageAppDirectory());

            if (package.CheckForSingleInstance()) {

                // reactivate the first instance if the process Id is valid

                platform.reactivateAnotherInstance();

                if (package.GetArgs().size() > 0 && platform.GetSingleInstanceProcessId() != 0) {

                    // if user specified args, try to pass them to the first instance

                    return RunVM(SINGLE_INSTANCE_NOTIFICATION_LAUNCH);

                }

                return true;

            }

            switch (platform.GetAppCDSState()) {

                case cdsDisabled:

                case cdsUninitialized:

                case cdsEnabled: {

                    break;

                }

                case cdsGenCache: {

                        TString cacheDirectory = package.GetAppCDSCacheDirectory();

                        if (FilePath::DirectoryExists(cacheDirectory) == false) {

                            FilePath::CreateDirectory(cacheDirectory, true);

                        }

                        else {

                            TString cacheFileName = package.GetAppCDSCacheFileName();

                            if (FilePath::FileExists(cacheFileName) == true) {

                                FilePath::DeleteFile(cacheFileName);

                            }

                        }

                        break;

                    }

                case cdsAuto: {

                    TString cacheFileName = package.GetAppCDSCacheFileName();

                    if (parentProcess == true && FilePath::FileExists(cacheFileName) == false) {

                        AutoFreePtr<Process> process = platform.CreateProcess();

                        std::vector<TString> args;

                        args.push_back(_T("-Xappcds:generatecache"));

                        args.push_back(_T("-Xapp:child"));

                        process->Execute(platform.GetModuleFileName(), args, true);

                        if (FilePath::FileExists(cacheFileName) == false) {

                            // Cache does not exist after trying to generate it,

                            // so run without cache.

                            platform.SetAppCDSState(cdsDisabled);

                            package.Clear();

                            package.Initialize();

                        }

                    }

                    break;

                }

            }

            // Validation

            {

                switch (platform.GetAppCDSState()) {

                    case cdsDisabled:

                    case cdsGenCache: {

                        // Do nothing.

                        break;

                    }

                    case cdsEnabled:

                    case cdsAuto: {

                            TString cacheFileName = package.GetAppCDSCacheFileName();

                            if (FilePath::FileExists(cacheFileName) == false) {

                                Messages& messages = Messages::GetInstance();

                                TString message = PlatformString::Format(messages.GetMessage(APPCDS_CACHE_FILE_NOT_FOUND), cacheFileName.data());

                                throw FileNotFoundException(message);

                            }

                            break;

                        }

                    case cdsUninitialized: {

                        // throw Exception(_T("Internal Error")); // VS2017

                        platform.ShowMessage(_T("Internal Error"));

                        break;

                    }

                }

            }

            // Run App

            result = RunVM(USER_APP_LAUNCH);

        }

        catch (FileNotFoundException &e) {

            platform.ShowMessage(e.GetMessage());

        }

        return result;

    }

    }

}