package main

var NoteToSemitone map[string]int
var SemitoneToNote map[int]string

func init() {
	baseNotes := []string{"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"}

	NoteToSemitone = make(map[string]int, 26)
	SemitoneToNote = make(map[int]string, 12)

	for i, note := range baseNotes {
		NoteToSemitone[note] = i
		SemitoneToNote[i] = note
	}

	enharmonics := map[string]string{
		"Cb":  "B",
		"B#":  "C",
		"Db":  "C#",
		"C##": "D",
		"Eb":  "D#",
		"D##": "E",
		"Fb":  "E",
		"E#":  "F",
		"Gb":  "F#",
		"F##": "G",
		"Ab":  "G#",
		"G##": "A",
		"Bb":  "A#",
		"A##": "B",
	}
	for enh, actual := range enharmonics {
		NoteToSemitone[enh] = NoteToSemitone[actual]
	}
}