// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

// Package phonetic supplies the common spelling alphabet.
package phonetic

import "unicode"

// Letter returns a lowercase spelling word, or empty for non-Latin letters.
func Letter(char rune) string {
	words := [...]string{"alpha", "bravo", "charlie", "delta", "echo", "foxtrot", "golf", "hotel", "india", "juliet", "kilo", "lima", "mike", "november", "oscar", "papa", "quebec", "romeo", "sierra", "tango", "uniform", "victor", "whiskey", "x ray", "yankee", "zulu"}
	char = unicode.ToLower(char)
	if char < 'a' || char > 'z' {
		return ""
	}
	return words[char-'a']
}