/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   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, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Benjamin Grauer
   co-programmer: ...

   this file extends the framework file, so it renders what i want.
*/

#include "framework.h"

#include "physics_engine.h"
#include "particle_engine.h"
#include "fields.h"
#include "stdlibincl.h"
#include "graphics_engine.h"

#include <dirent.h>

#define PINIT_EMISSION_RATE          50
#define PINIT_EMISSION_VELOCITY      5.0
#define PINIT_SPREAD_ANGLE           0.1
#define PINIT_EMITTER_TYPE           EMITTER_DOT
#define PINIT_EMITTER_SIZE           1.0
#define PINIT_START_RADIUS           5.0
#define PINIT_END_RADIUS             0.0
#define PINIT_LIFESPAN               1.0
#define PINIT_CONSERVE_FACTOR        1.0
#define PINIT_PARTICLE_TYPE          PARTICLE_SPRITE
#define PINIT_INHERIT_SPEED          0.0
#define PINIT_PARTICLE_MASS          1.0
#define PINIT_MODEL_DIRECTORY        "models/"


Field* twirl;
Field* gravity;
Field* pointGravity;

void Framework::moduleInit(int argc, char** argv)
{
  GraphicsEngine::getInstance()->setWindowName("ParticlesFun", "particles");

  verbose = 5;
  ParticleEngine::getInstance();
  PhysicsEngine::getInstance();


  // Creating a Test Particle System

  ParticleSystem* system = new ParticleSystem(100000, PINIT_PARTICLE_TYPE);
  system->setRadius(0, PINIT_START_RADIUS, 0 );
  system->setRadius(1, PINIT_END_RADIUS, 0 );
  system->setLifeSpan(PINIT_LIFESPAN);

  system->setConserve(PINIT_CONSERVE_FACTOR);
  //system->setMass(5,3,6);

  // Creating a Test Particle Emitter
  ParticleEmitter* emitter = new ParticleEmitter(Vector(0 , 1, 0));
  emitter->setEmissionRate(PINIT_EMISSION_RATE);
  emitter->setEmissionVelocity(PINIT_EMISSION_VELOCITY ,0);
  emitter->setSpread(PINIT_SPREAD_ANGLE ,0);
  emitter->setType(PINIT_EMITTER_TYPE);
  emitter->setSize(PINIT_EMITTER_SIZE);
  emitter->setAbsCoor(Vector(3,0,0));
  // Add the Flow from the Emitter into the System
  ParticleEngine::getInstance()->addConnection(emitter, system);


  twirl = new Twirl();
  twirl->setMagnitude(0);
  gravity = new Gravity();
  gravity->setMagnitude(0);
  pointGravity = new PointGravity();
  pointGravity->setMagnitude(0);

  new PhysicsConnection(system, gravity);
  new PhysicsConnection(system, twirl);
  new PhysicsConnection(system, pointGravity);
}

void Framework::moduleEventHandler(SDL_Event* event)
{
  switch (event->type)
    {
    case SDL_KEYDOWN:
      switch (event->key.keysym.sym)
        {
        case SDLK_i:
          ParticleEngine::getInstance()->debug();
          PhysicsEngine::getInstance()->debug();
          break;
        }
    }
}

void Framework::moduleTick(float dt)
{
  PhysicsEngine::getInstance()->tick(dt);
  ParticleEngine::getInstance()->tick(dt);
}

void Framework::moduleDraw() const
{
  ParticleEngine::getInstance()->draw();
}


void Framework::moduleHelp(void) const
{
  PRINT(0)("\n");
  PRINT(0)("i - Particle-state Information\n\n");
  PRINT(0)("\n");
}

int emitterChange(GtkWidget* nonInterest, void* widget)
{
  Option* option = (Option*) widget;
  const char* name = option->getTitle();
  char* value = option->save();

  ParticleEmitter* tmpEmit = ParticleEngine::getInstance()->getEmitterByNumber(1);
  if (tmpEmit)
    {
      if (!strcmp(name, "EmissionRate"))
        {
          tmpEmit->setEmissionRate(atof(value));
          PRINT(4)("EmissionRate set to %f\n", atof(value));
        }
      else if (!strcmp(name, "Velocity"))
        {
          tmpEmit->setEmissionVelocity(atof(value));
          PRINT(4)("Velocity set to %f\n", atof(value));
        }
      else if(!strcmp(name, "SpreadAngle"))
        {
          tmpEmit->setSpread(atof(value), 0);
          PRINT(4)("SpreadAngle set to %f\n", atof(value));
        }
      else if(!strcmp(name, "EmitterType"))
        {
          if (!strcmp(value, "EMITTER_DOT"))
            tmpEmit->setType(EMITTER_DOT);
          else if (!strcmp(value, "EMITTER_PLANE"))
            tmpEmit->setType(EMITTER_PLANE);
          else if (!strcmp(value, "EMITTER_CUBE"))
            tmpEmit->setType(EMITTER_CUBE);
          PRINT(4)("EmitterType set to %s\n", value);
        }
      else if(!strcmp(name, "EmitterSize"))
        {
          tmpEmit->setSize(atof(value));
          PRINT(4)("EmitterSize set to %f\n", atof(value));
        }
        else if (!strcmp(name, "InheritSpeed"))
        {
          tmpEmit->setInheritSpeed(atof(value));
          PRINT(4)("ParticleInheritSpeed set to %f\n", atof(value));
        }
    }
  delete value;
}


int systemChange(GtkWidget* nonInterest, void* widget)
{
  Option* option = (Option*) widget;
  const char* name = option->getTitle();
  char* value = option->save();

  ParticleSystem* tmpSys = ParticleEngine::getInstance()->getSystemByNumber(1);
  if (tmpSys)
    {
      if (!strcmp(name, "StartRadius"))
        {
          tmpSys->setRadius(0, atof(value));
          PRINT(4)("ParticleStartRadius set to %f\n", atof(value));
        }
      else if (!strcmp(name, "EndRadius"))
        {
          tmpSys->setRadius( 1, atof(value));
          PRINT(4)("ParticleEndRadius set to %f\n", atof(value));
        }

      else if (!strcmp(name, "LifeSpan"))
        {
          tmpSys->setLifeSpan(atof(value));
          PRINT(4)("ParticleLifeSpan set to %f\n", atof(value));
        }

      else if (!strcmp(name, "Mass"))
        {
          tmpSys->setMass(0, atof(value));
          PRINT(4)("ParticleMass set to %f\n", atof(value));
        }

      else if (!strcmp(name, "ConserveFactor"))
        {
          tmpSys->setConserve(atof(value));
          PRINT(4)("ParticleConserveFactor set to %f\n", atof(value));
        }

      else if (!strcmp(name, "ParticleType"))
        {
          if (!strcmp(value, "PARTICLE_DOT"))
            tmpSys->setType(PARTICLE_DOT);
          else if (!strcmp(value, "PARTICLE_SPARK"))
            tmpSys->setType(PARTICLE_SPARK);
          else if (!strcmp(value, "PARTICLE_SPRITE"))
            tmpSys->setType(PARTICLE_SPRITE);

          PRINT(4)("ParticleType set to %s\n", value);
        }
        else if(!strcmp(name, "ParticleModel"))
        {
          char* modelName = new char[strlen(PINIT_MODEL_DIRECTORY) + strlen(value)+1];
          sprintf(modelName, "%s%s", PINIT_MODEL_DIRECTORY, value);
          tmpSys->setModel(ResourceManager::getFullName(modelName));
          delete modelName;
        }
      else if (!strcmp(name, "RandomColor"))
        {
          tmpSys->setColor(0, (float)rand()/RAND_MAX, (float)rand()/RAND_MAX, (float)rand()/RAND_MAX, 1);
          tmpSys->setColor(.5, (float)rand()/RAND_MAX, (float)rand()/RAND_MAX, (float)rand()/RAND_MAX, .5);
          tmpSys->setColor(.5, (float)rand()/RAND_MAX, (float)rand()/RAND_MAX, (float)rand()/RAND_MAX, 0);
        }
    }
  delete value;
}

int fieldsChange(GtkWidget* nonInterest, void* widget)
{
  Option* option = (Option*) widget;
  const char* name = option->getTitle();
  char* value = option->save();


  if (!strcmp(name, "Gravity"))
    {
      gravity->setMagnitude(atof(value));
    }

  else if (!strcmp(name, "Twirl"))
    {
      twirl->setMagnitude(atof(value));
    }

  else if (!strcmp(name, "PointGravity"))
    {
      pointGravity->setMagnitude(atof(value));
    }

}

void Framework::moduleInitGui(int argc, char** argv)
{
  Window* guiMainWindow = NULL;

  initGUI(0, NULL);

  guiMainWindow = new Window("ParticlesFUN");
  {
    Box* windowBox = new Box('h');
    {
      Frame* emitterFrame = new Frame("emitter-settings");
      {
        Box* emitterBox = new Box('v');
        {
          emitterBox->fill(new Label("EmissionRate"));
          Slider* EmissionRate = new Slider("EmissionRate", 0, 1000);
          EmissionRate->connectSignal("value_changed", (void*)EmissionRate, emitterChange );
          EmissionRate->setValue(PINIT_EMISSION_RATE);
          EmissionRate->redraw();
          emitterBox->fill(EmissionRate);

          emitterBox->fill(new Label("Velocity"));
          Slider* velocity = new Slider("Velocity", 0, 20);
          velocity->setExactness(2);
          velocity->connectSignal("value_changed", (void*)velocity, emitterChange );
          velocity->setValue(PINIT_EMISSION_VELOCITY);
          velocity->redraw();
          emitterBox->fill(velocity);

          emitterBox->fill(new Label("SpreadAngle"));
          Slider* SpreadAngle = new Slider("SpreadAngle", 0, M_PI);
          SpreadAngle->setExactness(3);
          SpreadAngle->connectSignal("value_changed", (void*)SpreadAngle, emitterChange );
          SpreadAngle->setValue(PINIT_SPREAD_ANGLE);
          SpreadAngle->redraw();
          emitterBox->fill(SpreadAngle);

          emitterBox->fill(new Label("EmitterType"));
          Menu* EmitterType = new Menu("EmitterType");
          EmitterType->addItem("EMITTER_DOT");
          EmitterType->addItem("EMITTER_PLANE");
          EmitterType->addItem("EMITTER_CUBE");
          EmitterType->connectSignal("changed", (void*)EmitterType, emitterChange );
          EmitterType->load("EMITTER_DOT");
          emitterBox->fill(EmitterType);

          emitterBox->fill(new Label("EmitterSize"));
          Slider* EmitterSize = new Slider("EmitterSize", 0, 100);
          EmitterSize->setExactness(1);
          EmitterSize->connectSignal("value_changed", (void*)EmitterSize, emitterChange );
          EmitterSize->setValue(PINIT_EMITTER_SIZE);
          EmitterSize->redraw();
          emitterBox->fill(EmitterSize);

          emitterBox->fill(new Label("InheritSpeed"));
          Slider* InheritSpeed = new Slider("InheritSpeed", 0, 1);
          InheritSpeed->setExactness(3);
          InheritSpeed->connectSignal("value_changed", (void*)InheritSpeed, emitterChange );
          emitterBox->fill(InheritSpeed);
        }
        emitterFrame->fill(emitterBox);
      }
      windowBox->fill(emitterFrame);

      Frame* systemFrame = new Frame("system-settings");
      {
        Box* systemBox = new Box('v');
        {
          systemBox->fill(new Label("StartRadius"));
          Slider* StartRadius = new Slider("StartRadius", 0, 10);
          StartRadius->setExactness(3);
          StartRadius->connectSignal("value_changed", (void*)StartRadius, systemChange );
          StartRadius->setValue(PINIT_START_RADIUS);
          StartRadius->redraw();
          systemBox->fill(StartRadius);

          systemBox->fill(new Label("EndRadius"));
          Slider* EndRadius = new Slider("EndRadius", 0, 10);
          EndRadius->setExactness(3);
          EndRadius->connectSignal("value_changed", (void*)EndRadius, systemChange );
          EndRadius->setValue(PINIT_END_RADIUS);
          EndRadius->redraw();
          systemBox->fill(EndRadius);

          systemBox->fill(new Label("ParticleMass"));
          Slider* Mass = new Slider("Mass", 0, 10);
          Mass->setExactness(2);
          Mass->connectSignal("value_changed", (void*)Mass, systemChange );
          Mass->setValue(PINIT_PARTICLE_MASS);
          Mass->redraw();
          systemBox->fill(Mass);


          systemBox->fill(new Label("LifeSpan"));
          Slider* LifeSpan = new Slider("LifeSpan", 0, 10);
          LifeSpan->setExactness(3);
          LifeSpan->connectSignal("value_changed", (void*)LifeSpan, systemChange );
          LifeSpan->setValue(PINIT_LIFESPAN);
          LifeSpan->redraw();
          systemBox->fill(LifeSpan);

          systemBox->fill(new Label("ConserveFactor"));
          Slider* ConserveFactor = new Slider("ConserveFactor", 0, 1);
          ConserveFactor->setExactness(3);
          ConserveFactor->connectSignal("value_changed", (void*)ConserveFactor, systemChange );
          ConserveFactor->setValue(PINIT_CONSERVE_FACTOR);
          ConserveFactor->redraw();
          systemBox->fill(ConserveFactor);

          systemBox->fill(new Label("ParticleType"));
          Menu* ParticleType = new Menu("ParticleType");
          ParticleType->addItem("PARTICLE_DOT");
          ParticleType->addItem("PARTICLE_SPARK");
          ParticleType->addItem("PARTICLE_SPRITE");
          ParticleType->connectSignal("changed", (void*)ParticleType, systemChange );
          ParticleType->load("PARTICLE_SPRITE");
          systemBox->fill(ParticleType);

          systemBox->fill(new Label("ParticleModel"));
          Menu* ParticleModel = new Menu("ParticleModel");
          {
            DIR* directory;
            directory = opendir(ResourceManager::getFullName(PINIT_MODEL_DIRECTORY));
            dirent* file;
            while(file = readdir(directory))
            {
              printf("%s\n", file->d_name);
              if(strstr(file->d_name, ".obj"))
                 ParticleModel->addItem(file->d_name);
            }
          }
          ParticleModel->connectSignal("changed", (void*)ParticleModel, systemChange );
          systemBox->fill(ParticleModel);


          Button* RandomColor = new Button("RandomColor");
          RandomColor->connectSignal("released", (void*)RandomColor, systemChange);
          systemBox->fill(RandomColor);

        }
        systemFrame->fill(systemBox);
      }
      windowBox->fill(systemFrame);

      Frame* fieldsFrame = new Frame("Field-Settings");
      {
        Box* fieldsBox = new Box('v');
        {
          fieldsBox->fill(new Label("Gravity"));
          Slider* Gravity = new Slider("Gravity", 0, 10);
          Gravity->setExactness(1);
          Gravity->connectSignal("value_changed", (void*)Gravity, fieldsChange );
          Gravity->setValue(0);
          Gravity->redraw();
          fieldsBox->fill(Gravity);


          fieldsBox->fill(new Label("Twirl"));
          Slider* Twirl = new Slider("Twirl", 0, 10);
          Twirl->setExactness(1);
          Twirl->connectSignal("value_changed", (void*)Twirl, fieldsChange );
          Twirl->setValue(0);
          Twirl->redraw();
          fieldsBox->fill(Twirl);


          fieldsBox->fill(new Label("PointGravity"));
          Slider* PointGravity = new Slider("PointGravity", 0, 10);
          PointGravity->setExactness(1);
          PointGravity->connectSignal("value_changed", (void*)PointGravity, fieldsChange );
          PointGravity->setValue(0);
          PointGravity->redraw();
          fieldsBox->fill(PointGravity);

        }
        fieldsFrame->fill(fieldsBox);
      }
      windowBox->fill(fieldsFrame);

      Button* quitButton = new Button("quit");

      quitButton->connectSignal("clicked", NULL, quitGui);
      //  Window::mainWindow->connectSignal("remove", this, GuiExec::quitGui);
      Window::mainWindow->connectSignal("destroy", NULL, quitGui);
      windowBox->fill(quitButton);

    }
    guiMainWindow->fill(windowBox);
  }
  Window::mainWindow->showall();
  Window::mainWindow->setSize(300, 500);
}