/*
   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: hdavid, amaechler
*/

#include "rain_effect.h"

#include "util/loading/load_param.h"
#include "util/loading/factory.h"
#include "util/loading/resource_manager.h"

#include "glincl.h"
#include "p_node.h"
#include "state.h"
#include "spark_particles.h"
#include "plane_emitter.h"
#include "shell_command.h"

#include "parser/tinyxml/tinyxml.h"

SHELL_COMMAND(activate, RainEffect, activateRain);
SHELL_COMMAND(deactivate, RainEffect, deactivateRain);

using namespace std;

CREATE_FACTORY(RainEffect, CL_RAIN_EFFECT);

// TODO: Dim Light with Rain, Finish preCaching, check out if multiple rain emitters work

RainEffect::RainEffect(const TiXmlElement* root)
{
	this->setClassID(CL_RAIN_EFFECT, "RainEffect");

	this->init();

	if (root != NULL)
		this->loadParams(root);

	//load rain sound
	if (this->rainBuffer != NULL)
		ResourceManager::getInstance()->unload(this->rainBuffer);
	this->rainBuffer = (OrxSound::SoundBuffer*)ResourceManager::getInstance()->load("sound/rain.wav", WAV);

	//load wind sound
	if (this->rainWindForce > 0) {
		if (this->windBuffer != NULL)
			ResourceManager::getInstance()->unload(this->windBuffer);
		this->windBuffer = (OrxSound::SoundBuffer*)ResourceManager::getInstance()->load("sound/wind.wav", WAV);
	}

	this->activate();
}

RainEffect::~RainEffect()
{
	this->deactivate();

	if (this->rainBuffer != NULL)
		ResourceManager::getInstance()->unload(this->rainBuffer);

	if (this->windBuffer != NULL)
		ResourceManager::getInstance()->unload(this->windBuffer);
}

void RainEffect::loadParams(const TiXmlElement* root)
{
	WeatherEffect::loadParams(root);

	LoadParam(root, "coord", this, RainEffect, setRainCoord);
	LoadParam(root, "size", this, RainEffect, setRainSize);
	LoadParam(root, "rate", this, RainEffect, setRainRate);
	LoadParam(root, "velocity", this, RainEffect, setRainVelocity);
	LoadParam(root, "life", this, RainEffect, setRainLife);
	LoadParam(root, "wind", this, RainEffect, setRainWind);
	LoadParam(root, "option", this, RainEffect, setRainOption);
}


bool RainEffect::init()
{
	//Default values
	this->rainCoord = Vector(500, 500, 500);
	this->rainSize = Vector2D(1000, 1000);
	this->rainRate = 3000;
	this->rainVelocity = -300;
	this->rainLife = 4;
	this->rainMaxParticles = this->rainRate * this->rainLife;
	this->rainWindForce  = 0;

	this->emitter = new PlaneEmitter(this->rainSize);
}


SparkParticles* RainEffect::rainParticles = NULL;

bool RainEffect::activate()
{
	PRINTF(0)( "Activating RainEffect, coord: %f, %f, %f, size: %f, %f, rate: %f, velocity: %f, moveRain: %s\n", this->rainCoord.x, this->rainCoord.y, this->rainCoord.z, this->rainSize.x, this-> rainSize.y, this->rainRate, this->rainVelocity, this->rainMove ? "true" : "false" );

	if (unlikely(RainEffect::rainParticles == NULL))
	{
		RainEffect::rainParticles = new SparkParticles((int) this->rainMaxParticles);
		RainEffect::rainParticles->setName("RainParticles");
		RainEffect::rainParticles->precache((int)this->rainLife);
		RainEffect::rainParticles->setLifeSpan(this->rainLife, 2);
		RainEffect::rainParticles->setRadius(0, 0.03);
		RainEffect::rainParticles->setRadius(0.2, 0.02);
		RainEffect::rainParticles->setRadius(1, 0.01);
		RainEffect::rainParticles->setColor(0, 0.3, 0.3, 0.5, 0.2); // grey blue 1
		RainEffect::rainParticles->setColor(0.5, 0.4, 0.4, 0.5, 0.2); // grey blue 2
		RainEffect::rainParticles->setColor(1, 0.7, 0.7, 0.7, 0.2); // light grey
	}

	this->emitter->setSystem(RainEffect::rainParticles);

	this->emitter->setRelCoor(this->rainCoord);

	this->emitter->setEmissionRate(this->rainRate);
	this->emitter->setEmissionVelocity(this->rainVelocity);

	this->emitter->setSpread(this->rainWindForce / 50, 0.2);
	
	this->soundSource.loop(this->rainBuffer);
	if (this->rainWindForce > 0)
		this->soundSource.loop(this->windBuffer);
}


bool RainEffect::deactivate()
{
	PRINTF(0)("Deactivating RainEffect\n");
	this->emitter->setSystem(NULL);

	this->soundSource.stop();
}

void RainEffect::activateRain()
{
	this->activate();
}

void RainEffect::deactivateRain()
{
	this->deactivate();
}


void RainEffect::tick (float dt)
{
	if (this->rainMove) {
		this->rainCoord = State::getCameraNode()->getAbsCoor();
		this->emitter->setRelCoor(this->rainCoord.x , this->rainCoord.y+800, this->rainCoord.z);
	}
}