/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   JUCE is an open source library subject to commercial or open-source
   licensing.

   The code included in this file is provided under the terms of the ISC license
   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
   To use, copy, modify, and/or distribute this software for any purpose with or
   without fee is hereby granted provided that the above copyright notice and
   this permission notice appear in all copies.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

/*
    Note that a lot of methods that you'd expect to find in this file actually
    live in juce_posix_SharedCode.h!
*/

//==============================================================================
bool File::copyInternal (const File& dest) const
{
    JUCE_AUTORELEASEPOOL
    {
        NSFileManager* fm = [NSFileManager defaultManager];

        return [fm fileExistsAtPath: juceStringToNS (fullPath)]
               #if defined (MAC_OS_X_VERSION_10_6) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
                && [fm copyItemAtPath: juceStringToNS (fullPath)
                               toPath: juceStringToNS (dest.getFullPathName())
                                error: nil];
               #else
                && [fm copyPath: juceStringToNS (fullPath)
                         toPath: juceStringToNS (dest.getFullPathName())
                        handler: nil];
               #endif
    }
}

void File::findFileSystemRoots (Array<File>& destArray)
{
    destArray.add (File ("/"));
}


//==============================================================================
namespace MacFileHelpers
{
    static bool isFileOnDriveType (const File& f, const char* const* types)
    {
        struct statfs buf;

        if (juce_doStatFS (f, buf))
        {
            const String type (buf.f_fstypename);

            while (*types != nullptr)
                if (type.equalsIgnoreCase (*types++))
                    return true;
        }

        return false;
    }

    static bool isHiddenFile (const String& path)
    {
       #if defined (MAC_OS_X_VERSION_10_6) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6
        JUCE_AUTORELEASEPOOL
        {
            NSNumber* hidden = nil;
            NSError* err = nil;

            return [createNSURLFromFile (path) getResourceValue: &hidden forKey: NSURLIsHiddenKey error: &err]
                     && [hidden boolValue];
        }
       #elif JUCE_IOS
        return File (path).getFileName().startsWithChar ('.');
       #else
        FSRef ref;
        LSItemInfoRecord info;

        return FSPathMakeRefWithOptions ((const UInt8*) path.toRawUTF8(), kFSPathMakeRefDoNotFollowLeafSymlink, &ref, 0) == noErr
                 && LSCopyItemInfoForRef (&ref, kLSRequestBasicFlagsOnly, &info) == noErr
                 && (info.flags & kLSItemInfoIsInvisible) != 0;
       #endif
    }

   #if JUCE_IOS
    static String getIOSSystemLocation (NSSearchPathDirectory type)
    {
        return nsStringToJuce ([NSSearchPathForDirectoriesInDomains (type, NSUserDomainMask, YES)
                                objectAtIndex: 0]);
    }
   #else
    static bool launchExecutable (const String& pathAndArguments)
    {
        auto cpid = fork();

        if (cpid == 0)
        {
            const char* const argv[4] = { "/bin/sh", "-c", pathAndArguments.toUTF8(), nullptr };

            // Child process
            if (execve (argv[0], (char**) argv, nullptr) < 0)
                exit (0);
        }
        else
        {
            if (cpid < 0)
                return false;
        }

        return true;
    }
   #endif
}

bool File::isOnCDRomDrive() const
{
    static const char* const cdTypes[] = { "cd9660", "cdfs", "cddafs", "udf", nullptr };

    return MacFileHelpers::isFileOnDriveType (*this, cdTypes);
}

bool File::isOnHardDisk() const
{
    static const char* const nonHDTypes[] = { "nfs", "smbfs", "ramfs", nullptr };

    return ! (isOnCDRomDrive() || MacFileHelpers::isFileOnDriveType (*this, nonHDTypes));
}

bool File::isOnRemovableDrive() const
{
   #if JUCE_IOS
    return false; // xxx is this possible?
   #else
    JUCE_AUTORELEASEPOOL
    {
        BOOL removable = false;

        [[NSWorkspace sharedWorkspace]
               getFileSystemInfoForPath: juceStringToNS (getFullPathName())
                            isRemovable: &removable
                             isWritable: nil
                          isUnmountable: nil
                            description: nil
                                   type: nil];

        return removable;
    }
   #endif
}

bool File::isHidden() const
{
    return MacFileHelpers::isHiddenFile (getFullPathName());
}

//==============================================================================
const char* const* juce_argv = nullptr;
int juce_argc = 0;

File File::getSpecialLocation (const SpecialLocationType type)
{
    JUCE_AUTORELEASEPOOL
    {
        String resultPath;

        switch (type)
        {
            case userHomeDirectory:                 resultPath = nsStringToJuce (NSHomeDirectory()); break;

          #if JUCE_IOS
            case userDocumentsDirectory:            resultPath = MacFileHelpers::getIOSSystemLocation (NSDocumentDirectory); break;
            case userDesktopDirectory:              resultPath = MacFileHelpers::getIOSSystemLocation (NSDesktopDirectory); break;

            case tempDirectory:
            {
                File tmp (MacFileHelpers::getIOSSystemLocation (NSCachesDirectory));
                tmp = tmp.getChildFile (juce_getExecutableFile().getFileNameWithoutExtension());
                tmp.createDirectory();
                return tmp.getFullPathName();
            }

          #else
            case userDocumentsDirectory:            resultPath = "~/Documents"; break;
            case userDesktopDirectory:              resultPath = "~/Desktop"; break;

            case tempDirectory:
            {
                File tmp ("~/Library/Caches/" + juce_getExecutableFile().getFileNameWithoutExtension());
                tmp.createDirectory();
                return File (tmp.getFullPathName());
            }
          #endif
            case userMusicDirectory:                resultPath = "~/Music"; break;
            case userMoviesDirectory:               resultPath = "~/Movies"; break;
            case userPicturesDirectory:             resultPath = "~/Pictures"; break;
            case userApplicationDataDirectory:      resultPath = "~/Library"; break;
            case commonApplicationDataDirectory:    resultPath = "/Library"; break;
            case commonDocumentsDirectory:          resultPath = "/Users/Shared"; break;
            case globalApplicationsDirectory:       resultPath = "/Applications"; break;

            case invokedExecutableFile:
                if (juce_argv != nullptr && juce_argc > 0)
                    return File::getCurrentWorkingDirectory().getChildFile (String (juce_argv[0]));
                // deliberate fall-through...

            case currentExecutableFile:
                return juce_getExecutableFile();

            case currentApplicationFile:
            {
                const File exe (juce_getExecutableFile());
                const File parent (exe.getParentDirectory());

               #if JUCE_IOS
                return parent;
               #else
                return parent.getFullPathName().endsWithIgnoreCase ("Contents/MacOS")
                        ? parent.getParentDirectory().getParentDirectory()
                        : exe;
               #endif
            }

            case hostApplicationPath:
            {
                unsigned int size = 8192;
                HeapBlock<char> buffer;
                buffer.calloc (size + 8);

                _NSGetExecutablePath (buffer.get(), &size);
                return File (String::fromUTF8 (buffer, (int) size));
            }

            default:
                jassertfalse; // unknown type?
                break;
        }

        if (resultPath.isNotEmpty())
            return File (resultPath.convertToPrecomposedUnicode());
    }

    return {};
}

//==============================================================================
String File::getVersion() const
{
    JUCE_AUTORELEASEPOOL
    {
        if (NSBundle* bundle = [NSBundle bundleWithPath: juceStringToNS (getFullPathName())])
            if (NSDictionary* info = [bundle infoDictionary])
                if (NSString* name = [info valueForKey: nsStringLiteral ("CFBundleShortVersionString")])
                    return nsStringToJuce (name);
    }

    return {};
}

//==============================================================================
static NSString* getFileLink (const String& path)
{
    return [[NSFileManager defaultManager] destinationOfSymbolicLinkAtPath: juceStringToNS (path) error: nil];
}

bool File::isSymbolicLink() const
{
    return getFileLink (fullPath) != nil;
}

String File::getNativeLinkedTarget() const
{
    if (NSString* dest = getFileLink (fullPath))
        return nsStringToJuce (dest);

    return {};
}

//==============================================================================
bool File::moveToTrash() const
{
    if (! exists())
        return true;

    JUCE_AUTORELEASEPOOL
    {
       #if (defined (__IPHONE_11_0) && __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_11_0) \
         || (defined (MAC_OS_X_VERSION_10_8) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_8)
        NSError* error = nil;
        return [[NSFileManager defaultManager] trashItemAtURL: createNSURLFromFile (*this)
                                             resultingItemURL: nil
                                                        error: &error];
       #elif JUCE_IOS
        return deleteFile();
       #else
        [[NSWorkspace sharedWorkspace] recycleURLs: [NSArray arrayWithObject: createNSURLFromFile (*this)]
                                 completionHandler: nil];

        // recycleURLs is async, so we need to block until it has finished. We can't use a
        // run-loop here because it'd dispatch unexpected messages, so have to do this very
        // nasty bodge. But this is only needed for support of pre-10.8 versions.
        for (int retries = 100; --retries >= 0;)
        {
            if (! exists())
                return true;

            Thread::sleep (5);
        }

        return false;
       #endif
    }
}

//==============================================================================
class DirectoryIterator::NativeIterator::Pimpl
{
public:
    Pimpl (const File& directory, const String& wildcard)
        : parentDir (File::addTrailingSeparator (directory.getFullPathName())),
          wildCard (wildcard)
    {
        JUCE_AUTORELEASEPOOL
        {
            enumerator = [[[NSFileManager defaultManager] enumeratorAtPath: juceStringToNS (directory.getFullPathName())] retain];
        }
    }

    ~Pimpl()
    {
        [enumerator release];
    }

    bool next (String& filenameFound,
               bool* const isDir, bool* const isHidden, int64* const fileSize,
               Time* const modTime, Time* const creationTime, bool* const isReadOnly)
    {
        JUCE_AUTORELEASEPOOL
        {
            const char* wildcardUTF8 = nullptr;

            for (;;)
            {
                if (enumerator == nil)
                    return false;

                NSString* file = [enumerator nextObject];

                if (file == nil)
                    return false;

                [enumerator skipDescendents];
                filenameFound = nsStringToJuce (file).convertToPrecomposedUnicode();

                if (wildcardUTF8 == nullptr)
                    wildcardUTF8 = wildCard.toUTF8();

                if (fnmatch (wildcardUTF8, filenameFound.toUTF8(), FNM_CASEFOLD) != 0)
                    continue;

                auto fullPath = parentDir + filenameFound;
                updateStatInfoForFile (fullPath, isDir, fileSize, modTime, creationTime, isReadOnly);

                if (isHidden != nullptr)
                    *isHidden = MacFileHelpers::isHiddenFile (fullPath);

                return true;
            }
        }
    }

private:
    String parentDir, wildCard;
    NSDirectoryEnumerator* enumerator = nil;

    JUCE_DECLARE_NON_COPYABLE (Pimpl)
};

DirectoryIterator::NativeIterator::NativeIterator (const File& directory, const String& wildcard)
    : pimpl (new DirectoryIterator::NativeIterator::Pimpl (directory, wildcard))
{
}

DirectoryIterator::NativeIterator::~NativeIterator()
{
}

bool DirectoryIterator::NativeIterator::next (String& filenameFound,
                                              bool* const isDir, bool* const isHidden, int64* const fileSize,
                                              Time* const modTime, Time* const creationTime, bool* const isReadOnly)
{
    return pimpl->next (filenameFound, isDir, isHidden, fileSize, modTime, creationTime, isReadOnly);
}


//==============================================================================
bool JUCE_CALLTYPE Process::openDocument (const String& fileName, const String& parameters)
{
    JUCE_AUTORELEASEPOOL
    {
        NSString* fileNameAsNS (juceStringToNS (fileName));
        NSURL* filenameAsURL = File::createFileWithoutCheckingPath (fileName).exists() ? [NSURL fileURLWithPath: fileNameAsNS]
                                                                                       : [NSURL URLWithString: fileNameAsNS];

      #if JUCE_IOS
        ignoreUnused (parameters);

       #if (! defined __IPHONE_OS_VERSION_MIN_REQUIRED) || (! defined __IPHONE_10_0) || (__IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_10_0)
        return [[UIApplication sharedApplication] openURL: filenameAsURL];
       #else
        [[UIApplication sharedApplication] openURL: filenameAsURL options: @{} completionHandler: nil];
        return true;
       #endif
      #else
        NSWorkspace* workspace = [NSWorkspace sharedWorkspace];

        if (parameters.isEmpty())
            // NB: the length check here is because of strange failures involving long filenames,
            // probably due to filesystem name length limitations..
            return (fileName.length() < 1024 && [workspace openFile: juceStringToNS (fileName)])
                    || [workspace openURL: filenameAsURL];

        const File file (fileName);

        if (file.isBundle())
        {
            StringArray params;
            params.addTokens (parameters, true);

            NSMutableDictionary* dict = [[NSMutableDictionary new] autorelease];

            NSMutableArray* paramArray = [[NSMutableArray new] autorelease];

            for (int i = 0; i < params.size(); ++i)
                [paramArray addObject: juceStringToNS (params[i])];

            [dict setObject: paramArray
                     forKey: nsStringLiteral ("NSWorkspaceLaunchConfigurationArguments")];

            return [workspace launchApplicationAtURL: filenameAsURL
                                             options: NSWorkspaceLaunchDefault | NSWorkspaceLaunchNewInstance
                                       configuration: dict
                                               error: nil];
        }

        if (file.exists())
            return MacFileHelpers::launchExecutable ("\"" + fileName + "\" " + parameters);

        return false;
      #endif
    }
}

void File::revealToUser() const
{
   #if ! JUCE_IOS
    if (exists())
        [[NSWorkspace sharedWorkspace] selectFile: juceStringToNS (getFullPathName()) inFileViewerRootedAtPath: nsEmptyString()];
    else if (getParentDirectory().exists())
        getParentDirectory().revealToUser();
   #endif
}

//==============================================================================
OSType File::getMacOSType() const
{
    JUCE_AUTORELEASEPOOL
    {
        NSDictionary* fileDict = [[NSFileManager defaultManager] attributesOfItemAtPath: juceStringToNS (getFullPathName()) error: nil];
        return [fileDict fileHFSTypeCode];
    }
}

bool File::isBundle() const
{
   #if JUCE_IOS
    return false; // xxx can't find a sensible way to do this without trying to open the bundle..
   #else
    JUCE_AUTORELEASEPOOL
    {
        return [[NSWorkspace sharedWorkspace] isFilePackageAtPath: juceStringToNS (getFullPathName())];
    }
   #endif
}

#if JUCE_MAC
void File::addToDock() const
{
    // check that it's not already there...
    if (! juce_getOutputFromCommand ("defaults read com.apple.dock persistent-apps").containsIgnoreCase (getFullPathName()))
    {
        juce_runSystemCommand ("defaults write com.apple.dock persistent-apps -array-add \"<dict><key>tile-data</key><dict><key>file-data</key><dict><key>_CFURLString</key><string>"
                                 + getFullPathName() + "</string><key>_CFURLStringType</key><integer>0</integer></dict></dict></dict>\"");

        juce_runSystemCommand ("osascript -e \"tell application \\\"Dock\\\" to quit\"");
    }
}
#endif

} // namespace juce