/*
Reversound is used to get the music sheet of a piece from a music file.
Copyright (C) 2014  Gabriel AUGENDRE
Copyright (C) 2014  Gabriel DIENY
Copyright (C) 2014  Arthur GAUCHER
Copyright (C) 2014  Gabriel LEPETIT-AIMON

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 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package processing.processes;

import conteneurs.*;
import generictools.Instant;
import processing.buffer.Storage;
import processing.buffer.TemporalBuffer;
import processing.properties.FloatProperty;
import processing.properties.IntProperty;

import java.util.ArrayList;

/**
* Created by Gabriel on 21/05/2014.
 * Permet de passer de la détection des contours aux evenements, donc apparition et disparition de notes */
public class FreqEdgeToEvent extends IndexedProcess<NoteEventList> {

	IntProperty nPointRegroup;
	FloatProperty cutCoef;


	public FreqEdgeToEvent(TemporalBuffer<Spectre> input, int nPointRegroupMax, float cutCoef) {
		super("FreqEdgeToEvent", input, new TemporalBuffer<NoteEventList>(Storage.Type.ArrayList, input.getSampleRate(), Instant.fromIndex(0, input)));
		nPointRegroup = new IntProperty("nPoint regroupement", nPointRegroupMax);
		nPointRegroup.setMax(50);
		nPointRegroup.setMin(0);


		this.cutCoef = new FloatProperty("cut Coef", cutCoef);
		this.cutCoef.setMax(1);
		this.cutCoef.setMin(0);


		propertyManager().addProperty(nPointRegroup);
		propertyManager().addProperty(this.cutCoef);
	}

	@Override
	protected NoteEventList compute(Instant outputID) {

		NoteEventList listeEvent = new NoteEventList();
		int id = outputID.mapToIndex(output());
		Spectre r = maxRegroup(id);
		if(r == null)
			return new NoteEventList();


		// Si jamais ce n'est pas un spectre de notes, on le transforme pour pouvoir travailler dessus
		if(!(r.getGamme() instanceof NoteGamme)){
			r.castToGamme(NoteGamme.gamme());
		}

		ArrayList<Float> ampliEdges = r.getAmplitudes();
		Gamme frequencies = r.getGamme();
		float currentAmpli;
		for (int i = 1; i < frequencies.gammeSize(); i++) {
			currentAmpli = ampliEdges.get(i);
			//Cas d'une disparation brutale de note
			Profil profil = new Profil();
			profil.setAmplitude(Math.abs(currentAmpli), 0);

				if (currentAmpli < -200000f) {
					listeEvent.add(NoteEvent.disparitionEvent(new NoteProfiled(i, profil), -currentAmpli));
				} else if (currentAmpli > 300000f) {
					listeEvent.add(NoteEvent.apparitionEvent(new NoteProfiled(i, profil), currentAmpli));
				}

		}

		return listeEvent;
	}

	/** Supprime les maximums qui sont trop proches suivant une certaine marge de tolérance définie par cutCoeff
	 * @param inputID l'indice du buffer d'entrée */
	private Spectre maxRegroup(int inputID){
		if(input().get(inputID)==null)
			return null;

		Spectre currentSpectre = ((Spectre)input().get(inputID)).copy();
		if(currentSpectre==null)
			return null;


		for(int i=0; i<=nPointRegroup.getValue(); i++){
			Spectre previousSpectre = input().get(inputID-i)!=null?(Spectre)input().get(inputID-i):new Spectre( ((Spectre)input().get(inputID)).getGamme());
			Spectre nextSpectre = input().get(inputID+i)!=null?(Spectre)input().get(inputID+i):new Spectre( ((Spectre)input().get(inputID)).getGamme());

			for (int j = 1; j < currentSpectre.getGamme().gammeSize(); j++) {
				float currentAmpli = currentSpectre.getAmplitude(j);
				float previousAmpli = (previousSpectre.getAmplitude(j)*currentAmpli)>0?Math.abs(previousSpectre.getAmplitude(j)):0;
				float nextAmpli = (nextSpectre.getAmplitude(j)*currentAmpli)>0?Math.abs(nextSpectre.getAmplitude(j)):-1;

				currentAmpli = Math.abs(currentAmpli);
				if(currentAmpli == 0)
					continue;

				if(previousAmpli>currentAmpli/cutCoef.getValue() || nextAmpli>currentAmpli/cutCoef.getValue())
					currentSpectre.setAmplitudeAt(j, 0);
			}
		}
		return currentSpectre;
	}
	/** Renvoie le rapport entre 2 float */
	private float rapport(float f1, float f2){
		return Math.min(f1,f2)/Math.max(f1,f2);
	}

	/**
	 * À  redéfinir: Renvoie la liste des index dépendant de l'échantillon d'index inputID.
	 * @param inputID       index de l'échantillon qui est utilisé par ...
	 * @param inputBufferID
	 * @return La liste des indexs de sortie qui utilise inputID pour leur calcul.
	 */
	@Override
	protected ArrayList<Instant> idUsedBy(int inputBufferID, int inputID) {
		if(inputID!=0)
			return  new ArrayList<Instant>();

		ArrayList<Instant> r = new ArrayList<>((nPointRegroup.getValue())*2+1);
		int outputID = Instant.fromIndex(inputID, input()).mapToIndex(output());

		r.add(Instant.fromIndex(inputBufferID, input()));
		for(int k = 1; k < (nPointRegroup.getValue()); k++){
			r.add(0, Instant.fromIndex(outputID - k,output()));
			r.add(Instant.fromIndex(outputID + k, output()));
		}

		return r;
	}

	/** À  redéfinir: Renvoie, pour chaque buffer d'entrée la liste des index nécessaire au calcul de l'échantillon d'index outputID.
	 * @param outputID index de l'échantillon que l'on veut calculer
	 * @return Un tableau de même taille que getInputs(), et qui contient les liste des échantillons de chaque buffer de getInputs() nécessaire au calcul.
	 */
	@Override
	protected ArrayList<Instant>[] idNeededFor(int outputID) {
		ArrayList<Instant>[] t = new ArrayList[1];
		ArrayList<Instant> r = new ArrayList<>((nPointRegroup.getValue())*2+1);

		t[0] = r;
		if(outputID<0)
			return t;

		int inputID = Instant.fromIndex(outputID, output()).mapToIndex(input());
		r.add(Instant.fromIndex(inputID, input()));
		for(int k = 1; k < (nPointRegroup.getValue()); k++){
			r.add(0, Instant.fromIndex(inputID - k, input()));
			r.add(Instant.fromIndex(inputID + k, input()));
		}
		return t;
	}

	/** Renvoie le type du buffer de sortie
	 * @return La class des échantillones du buffer de sortie */
	@Override
	protected Class getType() {
		return NoteEventList.class;
	}

	@Override
	protected ProcessingOrder getProcessingOrder() {
		return ProcessingOrder.ASCENDING_ORDER;
	}
}