//  created:    2013/03/27
//  filename:   Gui.cpp
//
//  author:     Guillaume Sanahuja
//              Copyright Heudiasyc UMR UTC/CNRS 7253
//
//  version:    $Id: $
//
//  purpose:    classe definissant une Gui
//
/*********************************************************************/
#ifdef GL

#include "Gui.h"
#include "Gui_impl.h"
#include "Simulator.h"
#include "Simulator_impl.h"
#include "Model.h"
#include "Model_impl.h"
#include "AnimPoursuite.h"
#include <Euler.h>
#include <Object.h>
#include <IMeshSceneNode.h>
#include <IVideoDriver.h>
#include <ISceneManager.h>
#include <unistd.h>
#include <algorithm>
#include <GL/gl.h>

using namespace irr;
using namespace irr::video;
using namespace irr::core;
using namespace irr::scene;
using namespace irr::gui;
using namespace flair::core;

namespace {
    flair::simulator::Gui* gui_=NULL;
    std::vector <std::string> extensions;
    bool getGlInfo();
}

namespace flair { namespace simulator {

Gui* getGui(void) {
    return gui_;
}

bool noGui(void) {
    if(gui_==NULL) {
        return true;
    } else {
        return false;
    }
}

//getGlinfo, code from Song Ho Ahn (song.ahn@gmail.com)
bool getGlInfo() {
    char* str = 0;
    char* tok = 0;

    // get all extensions as a string
    str = (char*)glGetString(GL_EXTENSIONS);

    // split extensions
    if(str) {
        tok = strtok((char*)str, " ");
        while(tok) {
            extensions.push_back(tok);    // put a extension into struct
            tok = strtok(0, " ");               // next token
        }
    } else {
        printf("cannot get gl extensions\n");
    }

    // sort extension by alphabetical order
    std::sort(extensions.begin(), extensions.end());
}

//isGlExtensionSupported, code from Song Ho Ahn (song.ahn@gmail.com)
bool isGlExtensionSupported(const std::string& ext) {
    if(extensions.size()==0) getGlInfo();

    // search corresponding extension
    std::vector<std::string>::const_iterator iter = extensions.begin();
    std::vector<std::string>::const_iterator endIter = extensions.end();

    while(iter != endIter) {
        if(ext == *iter)
            return true;
        else
            ++iter;
    }
    return false;
}

float ToIrrlichtScale(float value) {
    return value*100.;
}

float ToSimulatorScale(float value) {
    return value/100.;
}

vector3df ToIrrlichtCoordinates(vector3df vect) {
    return ToIrrlichtScale(1)*vector3df(vect.X,vect.Y,-vect.Z);
}

vector3df ToIrrlichtCoordinates(Vector3D vect) {
    return ToIrrlichtScale(1)*vector3df(vect.x,vect.y,-vect.z);
}

Vector3D ToSimulatorCoordinates(vector3df vect) {
    return ToSimulatorScale(1)*Vector3D(vect.X,vect.Y,-vect.Z);
}

Quaternion ToIrrlichtOrientation(Quaternion quat) {
    /* original code
    Euler euler;
    quat.ToEuler(euler);
    matrix4 m;
    m.setRotationRadians(vector3df(0, 0, euler.yaw));
    matrix4 n;
    n.setRotationRadians(vector3df(0, -euler.pitch,0));
    m *= n;
    n.setRotationRadians(vector3df(-euler.roll, 0, 0));
    m *= n;
    */
    //seems to be equivalent to:
    return Quaternion(quat.q0,-quat.q1,-quat.q2,quat.q3);
}

Gui::Gui(const Simulator* parent,std::string name,int app_width, int app_height,int scene_width, int scene_height,std::string media_path,E_DRIVER_TYPE driver_type): Object(parent,name,"Gui") {
    if(gui_!=NULL) Err("Gui should be instanced only one time\n");
    pimpl_=new Gui_impl(this,app_width,app_height,scene_width,scene_height,media_path,driver_type);
    gui_=this;
}

Gui::~Gui() {
    delete pimpl_;
}

float Gui::getAspectRatio(void) const {
    return (float)pimpl_->scene_width/(float)pimpl_->scene_height;
}

ISceneManager* Gui::getSceneManager(void) const {
    return pimpl_->smgr;
}

void Gui::setMesh(std::string file,vector3df position,vector3df rotation,vector3df scale) {
    pimpl_->setMesh(file,position,rotation,scale);
}

vector3df Gui::getRotation(void) const {
    return pimpl_->node->getRotation();
}

IrrlichtDevice *Gui::getDevice(void) const {
    return pimpl_->device;
}

ITexture* Gui::getTexture(std::string filename) const {
    filename=pimpl_->media_path+ "/" +filename;
    return pimpl_->driver->getTexture(filename.c_str());
}

IAnimatedMesh* Gui::getMesh(std::string filename) const {
    filename=pimpl_->media_path+ "/" +filename;
    return pimpl_->smgr->getMesh(filename.c_str());
}

} // end namespace simulator
} // end namespace flair
#endif //GL