/*
 * 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"

#ifdef MAC

#include "MacPlatform.h"
#include "Helpers.h"
#include "Package.h"
#include "PropertyFile.h"
#include "IniFile.h"

#include <sys/sysctl.h>
#include <pthread.h>
#include <vector>

#import <Foundation/Foundation.h>
#import <AppKit/NSRunningApplication.h>

#include <CoreFoundation/CoreFoundation.h>
#include <CoreFoundation/CFString.h>

#ifdef __OBJC__
#import <Cocoa/Cocoa.h>
#endif //__OBJC__

#define MAC_PACKAGER_TMP_DIR \
        "/Library/Application Support/Oracle/Java/Packager/tmp"

NSString* StringToNSString(TString Value) {
    NSString* result = [NSString stringWithCString:Value.c_str()
            encoding:[NSString defaultCStringEncoding]];
    return result;
}

MacPlatform::MacPlatform(void) : Platform(), GenericPlatform(), PosixPlatform() {
}

MacPlatform::~MacPlatform(void) {
}

bool MacPlatform::UsePListForConfigFile() {
    return FilePath::FileExists(GetConfigFileName()) == false;
}

void MacPlatform::ShowMessage(TString Title, TString Description) {
    NSString *ltitle = StringToNSString(Title);
    NSString *ldescription = StringToNSString(Description);

    NSLog(@"%@:%@", ltitle, ldescription);
}

void MacPlatform::ShowMessage(TString Description) {
    TString appname = GetModuleFileName();
    appname = FilePath::ExtractFileName(appname);
    ShowMessage(appname, Description);
}

TString MacPlatform::getTmpDirString() {
    return TString(MAC_PACKAGER_TMP_DIR);
}

void MacPlatform::reactivateAnotherInstance() {
    if (singleInstanceProcessId == 0) {
        printf("Unable to reactivate another instance, PID is undefined");
        return;
    }
    NSRunningApplication* app =
            [NSRunningApplication runningApplicationWithProcessIdentifier:
            singleInstanceProcessId];
    if (app != nil) {
        [app activateWithOptions: NSApplicationActivateIgnoringOtherApps];
    } else {
        printf("Unable to reactivate another instance PID: %d",
                singleInstanceProcessId);
    }
}

TCHAR* MacPlatform::ConvertStringToFileSystemString(TCHAR* Source,
        bool &release) {
    TCHAR* result = NULL;
    release = false;
    CFStringRef StringRef = CFStringCreateWithCString(kCFAllocatorDefault,
            Source, kCFStringEncodingUTF8);

    if (StringRef != NULL) {
        @try {
            CFIndex length =
                    CFStringGetMaximumSizeOfFileSystemRepresentation(StringRef);
            result = new char[length + 1];
            if (result != NULL) {
                if (CFStringGetFileSystemRepresentation(StringRef,
                        result, length)) {
                    release = true;
                }
                else {
                    delete[] result;
                    result = NULL;
                }
            }
        }
        @finally {
            CFRelease(StringRef);
        }
    }

    return result;
}

TCHAR* MacPlatform::ConvertFileSystemStringToString(TCHAR* Source,
        bool &release) {
    TCHAR* result = NULL;
    release = false;
    CFStringRef StringRef = CFStringCreateWithFileSystemRepresentation(
            kCFAllocatorDefault, Source);

    if (StringRef != NULL) {
        @try {
            CFIndex length = CFStringGetLength(StringRef);

            if (length > 0) {
                CFIndex maxSize = CFStringGetMaximumSizeForEncoding(
                        length, kCFStringEncodingUTF8);

                result = new char[maxSize + 1];
                if (result != NULL) {
                    if (CFStringGetCString(StringRef, result, maxSize,
                            kCFStringEncodingUTF8) == true) {
                        release = true;
                    }
                    else {
                        delete[] result;
                        result = NULL;
                    }
                }
            }
        }
        @finally {
            CFRelease(StringRef);
        }
    }

    return result;
}

void MacPlatform::SetCurrentDirectory(TString Value) {
    chdir(PlatformString(Value).toPlatformString());
}

TString MacPlatform::GetPackageRootDirectory() {
    NSBundle *mainBundle = [NSBundle mainBundle];
    NSString *mainBundlePath = [mainBundle bundlePath];
    NSString *contentsPath =
            [mainBundlePath stringByAppendingString:@"/Contents"];
    TString result = [contentsPath UTF8String];
    return result;
}

TString MacPlatform::GetAppDataDirectory() {
    TString result;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(
           NSApplicationSupportDirectory, NSUserDomainMask, YES);
    NSString *applicationSupportDirectory = [paths firstObject];
    result = [applicationSupportDirectory UTF8String];
    return result;
}

TString MacPlatform::GetBundledJVMLibraryFileName(TString RuntimePath) {
    TString result;

    // first try lib/, then lib/jli
    result = FilePath::IncludeTrailingSeparator(RuntimePath) +
             _T("Contents/Home/lib/libjli.dylib");

    if (FilePath::FileExists(result) == false) {
        result = FilePath::IncludeTrailingSeparator(RuntimePath) +
                 _T("Contents/Home/lib/jli/libjli.dylib");

        if (FilePath::FileExists(result) == false) {
            // cannot find
            NSLog(@"Cannot find libjli.dysym!");
            result = _T("");
        }
    }

    return result;
}

TString MacPlatform::GetAppName() {
    NSString *appName = [[NSProcessInfo processInfo] processName];
    TString result = [appName UTF8String];
    return result;
}

void AppendPListArrayToIniFile(NSDictionary *infoDictionary,
        IniFile *result, TString Section) {
    NSString *sectionKey =
        [NSString stringWithUTF8String:PlatformString(Section).toMultibyte()];
    NSDictionary *array = [infoDictionary objectForKey:sectionKey];

    for (id option in array) {
        if ([option isKindOfClass:[NSString class]]) {
            TString arg = [option UTF8String];

            TString name;
            TString value;

            if (Helpers::SplitOptionIntoNameValue(arg, name, value) == true) {
                result->Append(Section, name, value);
            }
        }
    }
}

void AppendPListDictionaryToIniFile(NSDictionary *infoDictionary,
        IniFile *result, TString Section, bool FollowSection = true) {
    NSDictionary *dictionary = NULL;

    if (FollowSection == true) {
        NSString *sectionKey = [NSString stringWithUTF8String:PlatformString(
                Section).toMultibyte()];
        dictionary = [infoDictionary objectForKey:sectionKey];
    }
    else {
        dictionary = infoDictionary;
    }

    for (id key in dictionary) {
        id option = [dictionary valueForKey:key];

        if ([key isKindOfClass:[NSString class]] &&
                    [option isKindOfClass:[NSString class]]) {
            TString name = [key UTF8String];
            TString value = [option UTF8String];
            result->Append(Section, name, value);
        }
    }
}

// Convert parts of the info.plist to the INI format the rest of the packager
// uses unless a packager config file exists.
ISectionalPropertyContainer* MacPlatform::GetConfigFile(TString FileName) {
    IniFile* result = new IniFile();
    if (result == NULL) {
        return NULL;
    }

    if (UsePListForConfigFile() == false) {
        if (result->LoadFromFile(FileName) == false) {
            // New property file format was not found,
            // attempt to load old property file format.
            Helpers::LoadOldConfigFile(FileName, result);
        }
    }
    else {
        NSBundle *mainBundle = [NSBundle mainBundle];
        NSDictionary *infoDictionary = [mainBundle infoDictionary];
        std::map<TString, TString> keys = GetKeys();

        // Packager options.
        AppendPListDictionaryToIniFile(infoDictionary, result,
                keys[CONFIG_SECTION_APPLICATION], false);

        // jvmargs
        AppendPListArrayToIniFile(infoDictionary, result,
                keys[CONFIG_SECTION_JVMOPTIONS]);

        // Generate AppCDS Cache
        AppendPListDictionaryToIniFile(infoDictionary, result,
                keys[CONFIG_SECTION_APPCDSJVMOPTIONS]);
        AppendPListDictionaryToIniFile(infoDictionary, result,
                keys[CONFIG_SECTION_APPCDSGENERATECACHEJVMOPTIONS]);

        // args
        AppendPListArrayToIniFile(infoDictionary, result,
                keys[CONFIG_SECTION_ARGOPTIONS]);
    }

    return result;
}

TString GetModuleFileNameOSX() {
    Dl_info module_info;
    if (dladdr(reinterpret_cast<void*>(GetModuleFileNameOSX),
            &module_info) == 0) {
        // Failed to find the symbol we asked for.
        return std::string();
    }
    return TString(module_info.dli_fname);
}

#include <mach-o/dyld.h>

TString MacPlatform::GetModuleFileName() {
    //return GetModuleFileNameOSX();

    TString result;
    DynamicBuffer<TCHAR> buffer(MAX_PATH);
    uint32_t size = buffer.GetSize();

    if (_NSGetExecutablePath(buffer.GetData(), &size) == 0) {
        result = FileSystemStringToString(buffer.GetData());
    }

    return result;
}

bool MacPlatform::IsMainThread() {
    bool result = (pthread_main_np() == 1);
    return result;
}

TPlatformNumber MacPlatform::GetMemorySize() {
    unsigned long long memory = [[NSProcessInfo processInfo] physicalMemory];

    // Convert from bytes to megabytes.
    TPlatformNumber result = memory / 1048576;

    return result;
}

std::map<TString, TString> MacPlatform::GetKeys() {
    std::map<TString, TString> keys;

    if (UsePListForConfigFile() == false) {
        return GenericPlatform::GetKeys();
    }
    else {
        keys.insert(std::map<TString, TString>::value_type(CONFIG_VERSION,
                _T("app.version")));
        keys.insert(std::map<TString, TString>::value_type(CONFIG_MAINJAR_KEY,
                _T("JVMMainJarName")));
        keys.insert(std::map<TString, TString>::value_type(CONFIG_MAINMODULE_KEY,
                _T("JVMMainModuleName")));
        keys.insert(std::map<TString, TString>::value_type(
                CONFIG_MAINCLASSNAME_KEY, _T("JVMMainClassName")));
        keys.insert(std::map<TString, TString>::value_type(
                CONFIG_CLASSPATH_KEY, _T("JVMAppClasspath")));
        keys.insert(std::map<TString, TString>::value_type(APP_NAME_KEY,
                _T("CFBundleName")));
        keys.insert(std::map<TString, TString>::value_type(CONFIG_APP_ID_KEY,
                _T("JVMPreferencesID")));
        keys.insert(std::map<TString, TString>::value_type(JVM_RUNTIME_KEY,
                _T("JVMRuntime")));
        keys.insert(std::map<TString, TString>::value_type(PACKAGER_APP_DATA_DIR,
                _T("CFBundleIdentifier")));

        keys.insert(std::map<TString, TString>::value_type(CONFIG_SPLASH_KEY,
                _T("app.splash")));
        keys.insert(std::map<TString, TString>::value_type(CONFIG_APP_MEMORY,
                _T("app.memory")));
        keys.insert(std::map<TString, TString>::value_type(CONFIG_APP_DEBUG,
                _T("app.debug")));
        keys.insert(std::map<TString, TString>::value_type(
                CONFIG_APPLICATION_INSTANCE, _T("app.application.instance")));

        keys.insert(std::map<TString, TString>::value_type(
                CONFIG_SECTION_APPLICATION, _T("Application")));
        keys.insert(std::map<TString, TString>::value_type(
                CONFIG_SECTION_JVMOPTIONS, _T("JVMOptions")));
        keys.insert(std::map<TString, TString>::value_type(
                CONFIG_SECTION_APPCDSJVMOPTIONS, _T("AppCDSJVMOptions")));
        keys.insert(std::map<TString, TString>::value_type(
                CONFIG_SECTION_APPCDSGENERATECACHEJVMOPTIONS,
                _T("AppCDSGenerateCacheJVMOptions")));
        keys.insert(std::map<TString, TString>::value_type(
                CONFIG_SECTION_ARGOPTIONS, _T("ArgOptions")));
    }

    return keys;
}

#ifdef DEBUG
bool MacPlatform::IsNativeDebuggerPresent() {
    int state;
    int mib[4];
    struct kinfo_proc info;
    size_t size;

    info.kp_proc.p_flag = 0;

    mib[0] = CTL_KERN;
    mib[1] = KERN_PROC;
    mib[2] = KERN_PROC_PID;
    mib[3] = getpid();

    size = sizeof(info);
    state = sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, NULL, 0);
    assert(state == 0);
    return ((info.kp_proc.p_flag & P_TRACED) != 0);
}

int MacPlatform::GetProcessID() {
    int pid = [[NSProcessInfo processInfo] processIdentifier];
    return pid;
}
#endif //DEBUG

#endif //MAC