//------------------------------------------------------------------------------
/*
    This file is part of Beast: https://github.com/vinniefalco/Beast
    Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>

    Portions of this file are from JUCE.
    Copyright (c) 2013 - Raw Material Software Ltd.
    Please visit http://www.juce.com

    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.

    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================

FileLogger::FileLogger (const File& file,
                        const String& welcomeMessage,
                        const int64 maxInitialFileSizeBytes)
    : logFile (file)
{
    if (maxInitialFileSizeBytes >= 0)
        trimFileSize (maxInitialFileSizeBytes);

    if (! file.exists())
        file.create();  // (to create the parent directories)

    String welcome;
    welcome << newLine
            << "**********************************************************" << newLine
            << welcomeMessage << newLine
            << "Log started: " << Time::getCurrentTime().toString (true, true) << newLine;

    FileLogger::logMessage (welcome);
}

FileLogger::~FileLogger() {}

//==============================================================================
void FileLogger::logMessage (const String& message)
{
    const ScopedLock sl (logLock);
    DBG (message);
    FileOutputStream out (logFile, 256);
    out << message << newLine;
}

void FileLogger::trimFileSize (int64 maxFileSizeBytes) const
{
    if (maxFileSizeBytes <= 0)
    {
        logFile.deleteFile();
    }
    else
    {
        const int64 fileSize = logFile.getSize();

        if (fileSize > maxFileSizeBytes)
        {
            TemporaryFile tempFile (logFile);

            {
                FileOutputStream out (tempFile.getFile());
                FileInputStream in (logFile);

                if (! (out.openedOk() && in.openedOk()))
                    return;

                in.setPosition (fileSize - maxFileSizeBytes);

                for (;;)
                {
                    const char c = in.readByte();
                    if (c == 0)
                        return;

                    if (c == '\n' || c == '\r')
                    {
                        out << c;
                        break;
                    }
                }

                out.writeFromInputStream (in, -1);
            }

            tempFile.overwriteTargetFileWithTemporary();
        }
    }
}

//==============================================================================
File FileLogger::getSystemLogFileFolder()
{
   #if BEAST_MAC
    return File ("~/Library/Logs");
   #else
    return File::getSpecialLocation (File::userApplicationDataDirectory);
   #endif
}

FileLogger* FileLogger::createDefaultAppLogger (const String& logFileSubDirectoryName,
                                                const String& logFileName,
                                                const String& welcomeMessage,
                                                const int64 maxInitialFileSizeBytes)
{
    return new FileLogger (getSystemLogFileFolder().getChildFile (logFileSubDirectoryName)
                                                   .getChildFile (logFileName),
                           welcomeMessage, maxInitialFileSizeBytes);
}

FileLogger* FileLogger::createDateStampedLogger (const String& logFileSubDirectoryName,
                                                 const String& logFileNameRoot,
                                                 const String& logFileNameSuffix,
                                                 const String& welcomeMessage)
{
    return new FileLogger (getSystemLogFileFolder().getChildFile (logFileSubDirectoryName)
                                                   .getChildFile (logFileNameRoot + Time::getCurrentTime().formatted ("%Y-%m-%d_%H-%M-%S"))
                                                   .withFileExtension (logFileNameSuffix)
                                                   .getNonexistentSibling(),
                           welcomeMessage, 0);
}