var EnglishToSpanish = function(){}

EnglishToSpanish.A="LA";
EnglishToSpanish.B="SI";
EnglishToSpanish.C="DO";
EnglishToSpanish.D="RE";
EnglishToSpanish.E="MI";
EnglishToSpanish.F="FA";
EnglishToSpanish.G="SOL";

var SpanishToEnglish = function(){}

SpanishToEnglish.LA="A";
SpanishToEnglish.SI="B";
SpanishToEnglish.DO="C";
SpanishToEnglish.RE="D";
SpanishToEnglish.MI="E";
SpanishToEnglish.FA="F";
SpanishToEnglish.SO="G";


function changeNotation(){
	var actualNotation = $('notation');
	var chords = document.getElementsByClassName('chord');
	var arrayChords = $A(chords);
	
	if(actualNotation.value == "spanish")
	{
		arrayChords.each(function changeSpanToEng(chordName){
			var chordsToChange = chordName.innerHTML.split('/');
			var finalChord = "";
			for(i=0;i<chordsToChange.length;i++)
			{
				if(i>0)
					finalChord+='/';
				var simpleChordName = chordsToChange[i];
				var chordLetter = simpleChordName.substring(0,2);
				var newChordName = SpanishToEnglish[chordLetter];
				if(newChordName!=undefined)
				{
					if(newChordName=="G")
						finalChord+=newChordName+simpleChordName.substring(3);
					else
						finalChord+=newChordName+simpleChordName.substring(2);
				}
				else{
					alert ('Se ha detectado un error al parsear el acorde '+chordLetter+'.Puedes editar el tab para corregirlo.');
				}
			}
			
			chordName.innerHTML = finalChord;
		});
		actualNotation.value= 'english';
	}
	else
	{
		arrayChords.each(function changeEngToSpan(chordName){
			var chordsToChange = chordName.innerHTML.split('/');
			var finalChord = "";
			for(i=0;i<chordsToChange.length;i++)
			{
				if(i>0)
					finalChord+='/';
				var simpleChordName = new String(chordsToChange[i]);
				var chordLetter = simpleChordName.charAt(0);
				var newChordName = EnglishToSpanish[chordLetter];
				if(newChordName!=undefined)
				{
					finalChord+=newChordName+simpleChordName.substring(1);
				}	
				else{
					alert ('Se ha detectado un error al parsear el acorde '+chordLetter+'. Puedes editar el tab para corregirlo.');
				}	
			}	
			chordName.innerHTML = finalChord;
		});
		actualNotation.value = 'spanish';
	}
}