/*
   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,  Think about what happens with building poss. to hang movewithcam off, sound volume, benchmark, possible to activate lightening, turn off visibility when in a building, variable emitter size depending on playable, also rain velocity

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);
	}
}