/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   License notice:
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   as published by the Free Software Foundation; either version 2
 *   of the License, or (at your option) any later version.
 *
 *   This program 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 for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Erwin 'vaiursch' Herrsche
 *   Co-authors:
 *      Reto Grieder
 *
 */

#include "BaseSound.h"

#include <vector>
#include <AL/alut.h>
#include <vorbis/vorbisfile.h>

#include "core/CoreIncludes.h"
#include "core/GameMode.h"
#include "core/Resource.h"

namespace orxonox
{
    BaseSound::BaseSound()
        : audioSource_(0)
        , audioBuffer_(0)
        , bPlayOnLoad_(false)
        , bLoop_(false)
    {
        RegisterRootObject(BaseSound);
    }

    BaseSound::~BaseSound()
    {
        this->setSource("");
    }

    void BaseSound::play()
    {
        if (alIsSource(this->audioSource_))
        {
            if (this->bLoop_)
                alSourcei(this->audioSource_, AL_LOOPING, AL_TRUE);
            else
                alSourcei(this->audioSource_, AL_LOOPING, AL_FALSE);
            alSourcePlay(this->audioSource_);

            if (alGetError() != AL_NO_ERROR)
            {
                 COUT(2) << "Sound: OpenAL: Error playin sound " << this->audioSource_ << std::endl;
            }
        }
    }

    void BaseSound::stop()
    {
        if (alIsSource(this->audioSource_))
            alSourceStop(this->audioSource_);
    }

    void BaseSound::pause()
    {
        if (alIsSource(this->audioSource_))
            alSourcePause(this->audioSource_);
    }

    bool BaseSound::isPlaying()
    {
        if (alIsSource(this->audioSource_))
            return getSourceState() == AL_PLAYING;
        return false;
    }

    bool BaseSound::isPaused()
    {
        if (alIsSource(this->audioSource_))
            return getSourceState() == AL_PAUSED;
        return true;
    }

    bool BaseSound::isStopped()
    {
        if (alIsSource(this->audioSource_))
            return getSourceState() == AL_INITIAL || getSourceState() == AL_STOPPED;
        return true;
    }

    void BaseSound::setPlayOnLoad(bool val)
    {
        this->bPlayOnLoad_ = true;
        this->play();
    }

    void BaseSound::setSource(const std::string& source)
    {
        this->source_ = source;
        if (!GameMode::playsSound())
            return;

        if (source.empty() && alIsSource(this->audioSource_))
        {
            // Unload sound
            alSourcei(this->audioSource_, AL_BUFFER, 0);
            alDeleteSources(1, &this->audioSource_);
            alDeleteBuffers(1, &this->audioBuffer_);
            return;
        }

        COUT(3) << "Sound: OpenAL ALUT: loading file " << source << std::endl;
        // Get DataStream from the resources
        shared_ptr<ResourceInfo> fileInfo = Resource::getInfo(source);
        if (fileInfo == NULL)
        {
            COUT(2) << "Warning: Sound file '" << source << "' not found" << std::endl;
            return;
        }
        DataStreamPtr stream = Resource::open(source);
        // Read everything into a temporary buffer
        char* buffer = new char[fileInfo->size];
        stream->read(buffer, fileInfo->size);

        this->audioBuffer_ = alutCreateBufferFromFileImage(buffer, fileInfo->size);
        delete[] buffer;

        if (this->audioBuffer_ == AL_NONE)
        {
            COUT(2) << "Sound: OpenAL ALUT: " << alutGetErrorString(alutGetError()) << std::endl;
            return;
            //if (filename.find("ogg", 0) != std::string::npos)
            //{
            //    COUT(2) << "Sound: Trying fallback ogg loader" << std::endl;
            //    this->audioBuffer_ = loadOggFile(filename);
            //}

            //if (this->audioBuffer_ == AL_NONE)
            //{
            //    COUT(2) << "Sound: fallback ogg loader failed: " << alutGetErrorString(alutGetError()) << std::endl;
            //    return;
            //}
        }

        alGenSources(1, &this->audioSource_);
        alSourcei(this->audioSource_, AL_BUFFER, this->audioBuffer_);
        if (alGetError() != AL_NO_ERROR)
        {
            COUT(2) << "Sound: OpenAL: Error loading sample file: " << source << std::endl;
            return;
        }

        alSource3f(this->audioSource_, AL_POSITION,  0, 0, 0);

        if (this->bPlayOnLoad_)
            this->play();
    }

    ALint BaseSound::getSourceState()
    {
        ALint state;
        alGetSourcei(this->audioSource_, AL_SOURCE_STATE, &state);
        return state;
    }

#if 0 // Not yet supported because of missing resource implementation
    ALuint BaseSound::loadOggFile(const std::string& filename)
    {
        char inbuffer[4096];
        std::vector<char> outbuffer;
        OggVorbis_File vf;
        vorbis_info* vorbisInfo;
        int eof = false;
        int current_section;
        ALuint buffer;
        ALenum format;

        FILE* f = fopen(filename.c_str(), "rb");

        if (ov_open(f, &vf, NULL, 0) < 0)
        {
            COUT(2) << "Sound: libvorbisfile: File does not seem to be an Ogg Vorbis bitstream" << std::endl;
            ov_clear(&vf);
            return AL_NONE;
        }

        while (!eof)
        {
            long ret = ov_read(&vf, inbuffer, sizeof(inbuffer), 0, 2, 1, &current_section);
            if (ret == 0)
            {
                eof = true;
            }
            else if (ret < 0)
            {
                COUT(2) << "Sound: libvorbisfile: error reading the file" << std::endl;
                ov_clear(&vf);
                return AL_NONE;
            }
            else
            {
                outbuffer.insert(outbuffer.end(), inbuffer, inbuffer + sizeof(inbuffer));
            }
        }

        vorbisInfo = ov_info(&vf, -1);
        if (vorbisInfo->channels == 1)
            format = AL_FORMAT_MONO16;
        else
            format = AL_FORMAT_STEREO16;

        alGenBuffers(1, &buffer);
        alBufferData(buffer, format, &outbuffer[0], outbuffer.size(), vorbisInfo->rate);
        ov_clear(&vf);

        return buffer;
    }
#endif

} // namespace: orxonox