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

    This file is part of the dRowAudio JUCE module
    Copyright 2004-13 by dRowAudio.

    ------------------------------------------------------------------------------

    dRowAudio is provided under the terms of The MIT License (MIT):

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.

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

#if DROWAUDIO_USE_CURL

} //namespace drow

#if JUCE_WINDOWS
    #include "curl/include/curl/curl.h"
#else
    #include <curl/curl.h>
#endif

namespace drow
{

//==============================================================================
CURLEasySession::CURLEasySession()
    : handle (CURLManager::getInstance()->createEasyCurlHandle()),
      progress (1.0f)
{
    enableFullDebugging (true);
    curl_easy_setopt (handle, CURLOPT_NOPROGRESS, false);
}

CURLEasySession::CURLEasySession (const juce::String& localPath,
                                  const juce::String& remotePath,
                                  bool upload,
                                  const juce::String& username,
                                  const juce::String& password)
    : handle (CURLManager::getInstance()->createEasyCurlHandle())
{
    handle = CURLManager::getInstance()->createEasyCurlHandle();
    enableFullDebugging (true);
    curl_easy_setopt (handle, CURLOPT_NOPROGRESS, false);

    setLocalFile (localPath);
    setRemotePath (remotePath);
    setUserNameAndPassword (username, password);
    beginTransfer (upload);
}

CURLEasySession::~CURLEasySession()
{
    CURLManager::getInstance()->removeTimeSliceClient (this);
    if (CURLManager::getInstance()->getNumClients() == 0)
        CURLManager::getInstance()->stopThread (1000);

    CURLManager::getInstance()->cleanUpEasyCurlHandle (handle);
}

//==============================================================================
void CURLEasySession::setInputStream (InputStream* newInputStream)
{
    localFile = File();
    inputStream = rawToUniquePtr (newInputStream); 
}

void CURLEasySession::setLocalFile (const File& newLocalFile)
{
    localFile = newLocalFile;
    inputStream = localFile.createInputStream();
}

void CURLEasySession::setRemotePath (const juce::String& newRemotePath)
{
    remotePath = newRemotePath;

    if (remotePath.getLastCharacters (1) == "/")
        remotePath  = remotePath << localFile.getFileName();

    curl_easy_setopt (handle, CURLOPT_URL, remotePath.toUTF8().getAddress());
}

void CURLEasySession::setUserNameAndPassword (const juce::String& username, const juce::String& password)
{
    userNameAndPassword = username + ":" + password;
    curl_easy_setopt (handle, CURLOPT_USERPWD, userNameAndPassword.toUTF8().getAddress());
}

//==============================================================================
String CURLEasySession::getCurrentWorkingDirectory() const
{
    char url[1000];
    CURLcode res = curl_easy_getinfo (handle, CURLINFO_EFFECTIVE_URL, url);

    if (res == CURLE_OK && CharPointer_ASCII::isValidString (url, 1000))
        return juce::String (url);

    return juce::String();
}

StringArray CURLEasySession::getDirectoryListing()
{
    juce::String remoteUrl (remotePath.upToLastOccurrenceOf ("/", true, false));
    curl_easy_setopt (handle, CURLOPT_URL, remoteUrl.toUTF8().getAddress());

    directoryContentsList.setSize (0);

    curl_easy_setopt (handle, CURLOPT_PROGRESSFUNCTION, 0L);
    curl_easy_setopt (handle, CURLOPT_UPLOAD, 0L);
    curl_easy_setopt (handle, CURLOPT_DIRLISTONLY, 1L);
    curl_easy_setopt (handle, CURLOPT_WRITEDATA, this);
    curl_easy_setopt (handle, CURLOPT_WRITEFUNCTION, directoryListingCallback);

    // perform the tranfer
    progress = 0.0f;
    CURLcode result = curl_easy_perform (handle);
    reset();

    if (result == CURLE_OK)
    {
        juce::StringArray list;
        list.addLines (directoryContentsList.toString().trim());
        return list;
    }

    return juce::StringArray (curl_easy_strerror (result));
}

// not yet ready
//String CURLEasySession::getContentType()
//{
//    char *ct;
//
//    CURLcode result = curl_easy_getinfo (handle, CURLINFO_CONTENT_TYPE, &ct);
//
//    if (CURLE_OK == result)// && ct != nullptr)
//    {
//        DBG("CURLE_OK: " + remotePath);
//        return ct;
//    }
//    else
//    {
//        DBG("CURLE_NOT_OK");
//        return juce::String::empty;
//    }
//}

//==============================================================================
void CURLEasySession::enableFullDebugging (bool shouldEnableFullDebugging)
{
    curl_easy_setopt (handle, CURLOPT_VERBOSE, shouldEnableFullDebugging ? 1L : 0L);
}

void CURLEasySession::beginTransfer (bool transferIsUpload, bool performOnBackgroundThread)
{
    isUpload = transferIsUpload;
    shouldStopTransfer = false;

    if (performOnBackgroundThread)
    {
        CURLManager::getInstance()->addTimeSliceClient (this);
        CURLManager::getInstance()->startThread();
    }
    else
    {
        performTransfer (isUpload);
    }
}

void CURLEasySession::stopTransfer()
{
    shouldStopTransfer = true;
}

void CURLEasySession::reset()
{
    curl_easy_reset (handle);
    curl_easy_setopt (handle, CURLOPT_URL, remotePath.toUTF8().getAddress());
    curl_easy_setopt (handle, CURLOPT_USERPWD, userNameAndPassword.toUTF8().getAddress());
    curl_easy_setopt (handle, CURLOPT_NOPROGRESS, false);
}

//==============================================================================
void CURLEasySession::addListener (CURLEasySession::Listener* const listener)
{
    listeners.add (listener);
}

void CURLEasySession::removeListener (CURLEasySession::Listener* const listener)
{
    listeners.remove (listener);
}

//==============================================================================
int CURLEasySession::useTimeSlice()
{
    performTransfer (isUpload);

    return -1;
}

//==============================================================================
size_t CURLEasySession::writeCallback (void* sourcePointer, size_t blockSize, size_t numBlocks, CURLEasySession* session)
{
    if (session != nullptr)
    {
        if (session->outputStream->failedToOpen())
        {
            /* failure, can't open file to write */
            return ! (blockSize * numBlocks); // return a value not equal to (blockSize * numBlocks)
        }

        session->outputStream->write (sourcePointer, blockSize * numBlocks);
        return blockSize * numBlocks;
    }

    return ! (blockSize * numBlocks); // return a value not equal to (blockSize * numBlocks)
}

size_t CURLEasySession::readCallback (void* destinationPointer, size_t blockSize, size_t numBlocks, CURLEasySession* session)
{
    if (session != nullptr)
    {
        if (session->inputStream.get() == nullptr)
            return CURL_READFUNC_ABORT; /* failure, can't open file to read */

        return (size_t) session->inputStream->read (destinationPointer, (int) (blockSize * numBlocks));
    }

    return CURL_READFUNC_ABORT;
}

size_t CURLEasySession::directoryListingCallback (void* sourcePointer, size_t blockSize, size_t numBlocks, CURLEasySession* session)
{
    if (session != nullptr)
    {
        session->directoryContentsList.append (sourcePointer, (size_t) (blockSize * numBlocks));

        return blockSize * numBlocks;
    }

    return ! (blockSize * numBlocks); // return a positive value not equal to (blockSize * numBlocks)
}

int CURLEasySession::internalProgressCallback (CURLEasySession* session, double dltotal, double dlnow, double /*ultotal*/, double ulnow)
{
    session->progress = (float) (session->isUpload ? (ulnow / session->inputStream->getTotalLength()) : (dlnow / dltotal));

    session->listeners.call (&CURLEasySession::Listener::transferProgressUpdate, session);

    return (int) session->shouldStopTransfer;
}

//==============================================================================
int CURLEasySession::performTransfer (bool transferIsUpload)
{
    curl_easy_setopt (handle, CURLOPT_URL, remotePath.toUTF8().getAddress());
    curl_easy_setopt (handle, CURLOPT_UPLOAD, (long) transferIsUpload);
    curl_easy_setopt (handle, CURLOPT_PROGRESSDATA, this);
    curl_easy_setopt (handle, CURLOPT_PROGRESSFUNCTION, internalProgressCallback);

    if (transferIsUpload)
    {
        // sets the pointer to be passed to the read callback
        curl_easy_setopt (handle, CURLOPT_READDATA, this);
        curl_easy_setopt (handle, CURLOPT_READFUNCTION, readCallback);
        inputStream->setPosition (0);
    }
    else
    {
        // sets the pointer to be passed to the write callback
        curl_easy_setopt (handle, CURLOPT_WRITEDATA, this);
        curl_easy_setopt (handle, CURLOPT_WRITEFUNCTION, writeCallback);

        // create local file to recieve transfer
        if (localFile.existsAsFile())
            localFile = localFile.getNonexistentSibling();

        outputStream = localFile.createOutputStream();
    }

    //perform the transfer
    progress = 0.0f;
    listeners.call (&CURLEasySession::Listener::transferAboutToStart, this);
    CURLcode result = curl_easy_perform (handle);

    // delete the streams to flush the buffers
    outputStream = nullptr;
    listeners.call (&CURLEasySession::Listener::transferEnded, this);

    return result;
}

#endif //DROWAUDIO_USE_CURL
