// title: Re: midified arpeggiator/auto-accompaniment using patterns
// author: elgiano
// description:
// Re: Let me know if you have ideas for improvement! (code-wise or feature-wise) ->
// I used an object prototype to streamline the process of registering notes and getting sequences of them. Code looks simpler to me and easier to further develop :)
// code:
(
s.waitForBoot({
	var right, left;

	MIDIdef.freeAll;
	if (~midi_initilized.isNil) {
		MIDIClient.init;
		MIDIIn.connectAll;
		~midi_initialized = 1;
	};

	~n = (
		table: Order(),
		noteOn: {|n,note| n.table[note] = 1},
		noteOff: {|n,note| n.table.removeAt(note)},
		get: {|n,i| 
			n.table.indices[i] ?? n.table.indices.first ?? Rest(1)
		},
		seq: {|n,notes|
			notes.asArray.collect{|i| Plazy{n.get(i)}}
		}
	);
	
	MIDIdef.noteOn(
		\mynoteonhandler, // just a name for this handler
		{
			|val, num, chan, src|
			~n.noteOn(num)
		}
	);

	MIDIdef.noteOff(
		\mynoteoffhandler, // just a name for this handler
		{
			|val, num, chan, src|
			~n.noteOff(num) // update note table and update ~n
			/*
			// only enable the following lines if you want the arpeggio to stop as soon as you release the keys
			~n.table.clear
			*/
		}
	);

	right = Pbind(
		\instrument, \default,
		\midinote, Pseq(~n.seq(
			[ 0, 2, 1, 2] ++ (([ 0, 2, 1, 2] + 12)!2).flatten
		)),
		\dur, 2*Pseq([1, 1, 1, 1, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5 ].normalizeSum)
	);
	left = Pbind(
		\instrument, \default,
		\midinote, Pseq(~n.seq([ 0, 2, 0, 2, 0, 2, 0, 2] - 12)),
		\dur, 2*Pseq([1, 1, 1, 1, 1, 1, 1, 1].normalizeSum)
	);
	if (~player.notNil) { ~player.stop; };
	~player = Pn(Ppar([right,left])).play;
});
)