#include "KSInstrument.h"
#include <cmath>

//Constructor
KSInstrument :: KSInstrument(int numberOfStringsIn, int numberOfVoicesIn, double lowNoteFreqIn, double feedbackGainIn, double fsIn)
{
	
	fs = fsIn;
	lowNoteFreq = lowNoteFreqIn;	
	feedbackGain = feedbackGainIn;
	numberOfStrings = numberOfStringsIn;
	numberOfVoices = numberOfVoicesIn;
	
	//Initialize strings
	ksStringsCollection = new KSString*[numberOfStrings];
	for (unsigned int i=0; i < numberOfStrings; i++)
	{
		ksStringsCollection[i] = new KSString(lowNoteFreq*pow(2,i/12.0), lowNoteFreq*pow(2,i/12.0), fs, feedbackGain);
	}
		
}

//Destructor
KSInstrument :: ~KSInstrument()
{	
	for (unsigned int i=0; i<numberOfStrings; i++)
		delete ksStringsCollection[i];
		
	delete []ksStringsCollection;	
}

//Plucks the given string and marks it as active (being played)
void KSInstrument :: pluckString(int stringNum, int velocity)
{
	if( activeStrings.size() < numberOfVoices )
	{
		markInactive(stringNum);	//In case we missed a note off signal?
		ksStringsCollection[stringNum]->pluck(velocity);
		activeStrings.push_front(stringNum);
	}

}

//Marks the given string as no longer active (no longer being played)
void KSInstrument :: markInactive(int stringNum)
{
	activeStrings.remove(stringNum);
}

//Gets the sum of the next output samples from all active strings and increments time one sample for those strings
SAMPLE KSInstrument :: tick()
{
	SAMPLE outputSum = 0.0;

	for(iter=activeStrings.begin(); iter != activeStrings.end(); ++iter)
		outputSum += ksStringsCollection[*iter]->tick();
	
	return outputSum;
}

void KSInstrument :: setFeedbackGain(double feedbackGainIn)
{
	feedbackGain = feedbackGainIn;
	
	for( unsigned int i=0; i<numberOfStrings; i++)
		ksStringsCollection[i]->setFeedbackGain(feedbackGain);
}

void KSInstrument :: clear()
{
	for(iter=activeStrings.begin(); iter != activeStrings.end(); ++iter)
		ksStringsCollection[*iter]->clear();
}