export type ScaleName =

	| 'major'

	| 'minor'

	| 'pentatonicMaj'

	| 'pentatonicMin'

	| 'dorian';

export const SCALES: Record<ScaleName, number[]> = {

	major: [0, 2, 4, 5, 7, 9, 11],

	minor: [0, 2, 3, 5, 7, 8, 10],

	pentatonicMaj: [0, 2, 4, 7, 9, 0, 2],

	pentatonicMin: [0, 3, 5, 7, 10, 0, 3],

	dorian: [0, 2, 3, 5, 7, 9, 10],

};

export const NOTE_NAMES = [

	'C',

	'C#',

	'D',

	'D#',

	'E',

	'F',

	'F#',

	'G',

	'G#',

	'A',

	'A#',

	'B',

];

export const COLS = 7;

export const ROWS = 4;

export function cellToMidi(

	col: number,

	row: number,

	rootPc: number,

	octaveBase: number,

	scale: ScaleName,

): number {

	const intervals = SCALES[scale];

	const interval = intervals[col % intervals.length];

	const octave = octaveBase + (ROWS - 1 - row);

	return 12 * (octave + 1) + rootPc + interval;

}