package electrosphere.client.entity.particle;

import java.util.Arrays;
import java.util.List;

import electrosphere.engine.signal.Signal;
import electrosphere.engine.signal.SignalServiceImpl;
import electrosphere.renderer.actor.instance.StridedInstanceData;
import electrosphere.renderer.buffer.HomogenousUniformBuffer.HomogenousBufferTypes;

/**
 * The particle service
 */
public class ParticleService extends SignalServiceImpl {

    /**
     * The maximum number of particles
     */
    static final int MAX_PARTICLES = 1000;

    /**
     * Path to the vertex shader
     */
    static final String VERTEX_SHADER_PATH = "";

    /**
     * Path to the fragment shader
     */
    static final String FRAGMENT_SHADER_PATH = "";



    /**
     * The instance data for the particles
     */
    StridedInstanceData particleInstanceData;

    /**
     * Constructor
     */
    public ParticleService() {
        super("ParticleService");
    }

    @Override
    public void destroy() {
        super.destroy();
        if(particleInstanceData != null){
            particleInstanceData.destroy();
        }
    }

    @Override
    public boolean handle(Signal signal){
        boolean rVal = false;
        switch(signal.getType()){
            case RENDERING_ENGINE_READY: {
                List<HomogenousBufferTypes> types = Arrays.asList(new HomogenousBufferTypes[]{
                    //position
                    HomogenousBufferTypes.VEC3D,
                    //rotation
                    HomogenousBufferTypes.VEC4D,
                    //scale
                    HomogenousBufferTypes.VEC3D,
                    //texture index
                    HomogenousBufferTypes.INT,
                });
                this.particleInstanceData = new StridedInstanceData(MAX_PARTICLES,types,VERTEX_SHADER_PATH,FRAGMENT_SHADER_PATH);
                rVal = true;
            } break;
            default: {
            } break;
        }
        return rVal;
    }
    
}