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

package app

import (
	"strings"
	"unicode"

	"git.stormux.org/storm/cthulhu/internal/input"
	"git.stormux.org/storm/cthulhu/internal/presentation"
	"git.stormux.org/storm/cthulhu/internal/review"
)

// Shared by review spelling and learn mode, matching Python Cthulhu's names.
func phoneticLetter(letter 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", "xray", "yankee", "zulu"}
	letter = unicode.ToLower(letter)
	if letter < 'a' || letter > 'z' {
		return ""
	}
	return words[letter-'a']
}

func flat_review_speech(command input.Command) review.FlatSpeech {
	switch command {
	case input.ReviewSpellWord:
		return review.FlatSpell
	case input.ReviewPhoneticWord, input.ReviewPhoneticCharacter:
		return review.FlatPhonetic
	}
	return review.FlatSpeak
}

// Preserve blank/whitespace announcements. Otherwise spell Unicode runes as
// separate utterances, retaining repeated letters and character-mode speech.
func set_review_spelling(request *speechRequest, text string, style review.FlatSpeech) {
	if style == review.FlatSpeak || strings.TrimSpace(text) == "" {
		return
	}
	request.Character = style == review.FlatSpell
	for _, letter := range text {
		kind := ""
		part := presentation.FlatReviewText(string(letter), true)
		if style == review.FlatPhonetic {
			if unicode.IsUpper(letter) {
				kind = "uppercase"
			}
			if name := phoneticLetter(letter); name != "" {
				part = name
			} else if unicode.IsLetter(letter) {
				part = string(unicode.ToLower(letter))
			}
		}
		request.Spelling = append(request.Spelling, part)
		request.SpellingVoices = append(request.SpellingVoices, kind)
	}
}