/**
 * Demonstrates acting and expressiveness with Bark TTS.
 *
 * Run: node acting-demo-bark.mjs [start-section]
 *
 * Bark expressive techniques:
 *   UPPERCASE          — stress/emphasis on a word
 *   ...                — hesitation, trailing off
 *   [laughs]           — laughter
 *   [sighs]            — sigh
 *   [gasps]            — sharp intake of breath
 *   [clears throat]    — throat clearing
 *   ♪ text ♪           — sung phrase
 *   —                  — abrupt break
 *   !                  — raised energy
 *
 * Voice presets (English):
 *   v2/en_speaker_0  calm female
 *   v2/en_speaker_1  calm male
 *   v2/en_speaker_3  deep male
 *   v2/en_speaker_6  neutral/warm (default)
 *   v2/en_speaker_9  expressive
 */

import { Bark_Tts } from './lib/bark-tts.mjs'

const tts = new Bark_Tts()

process.stderr.write('[bark] loading model...\n')
await tts.init()
process.stderr.write('[bark] ready\n\n')

const START = parseInt(process.argv[2] ?? '1', 10)

function section(title) {
	process.stdout.write(`\n${'─'.repeat(50)}\n${title}\n${'─'.repeat(50)}\n`)
}

async function say(text, voice = undefined) {
	const opts = { preprocess: false }
	if (voice) opts.voice = voice
	process.stdout.write(`  ${voice ?? 'default'}\n  "${text}"\n\n`)
	await tts.speak(text, opts)
}

// ─── 1. Baseline ───────────────────────────────────────
section('1. Baseline')
if (START <= 1) {
	await say('The package has arrived. Please sign here.')
}

// ─── 2. Paralinguistic tokens ──────────────────────────
section('2. Paralinguistic tokens')
if (START <= 2) {
	await say('[clears throat] Right. Where were we.')
	await say('And then he just... [sighs] gave up.')
	await say('[gasps] I had no idea you were here!')
	await say("Ha. [laughs] That's the funniest thing I've heard all week.")
}

// ─── 3. Emphasis via UPPERCASE ─────────────────────────
section('3. Emphasis via UPPERCASE')
if (START <= 3) {
	await say('You need to stop. RIGHT NOW.')
	await say('I have told you THIS BEFORE.')
	await say('This is ABSOLUTELY unacceptable.')
}

// ─── 4. Hesitation and rhythm ──────────────────────────
section('4. Hesitation and rhythm')
if (START <= 4) {
	await say('It was... quiet. Too quiet.')
	await say('I just... I don\'t know what to say.')
	await say('He said he was fine — but his eyes told a different story.')
}

// ─── 5. Sung phrase ────────────────────────────────────
section('5. Singing')
if (START <= 5) {
	await say('♪ Happy birthday to you, happy birthday to you ♪')
}

// ─── 6. Acronyms ───────────────────────────────────────
section('6. Acronyms')
if (START <= 6) {
	// Without spacing — Bark may try to pronounce as a word
	await say('The FBI is investigating.')
	await say('NASA launched a new rocket.')
	await say('I work with the CPU and GPU.')
	// With letter spacing — forces spelling out
	await say('The F B I is investigating.')
	await say('N A S A launched a new rocket.')
	await say('I work with the C P U and G P U.')
}

// ─── 7. Voice character ────────────────────────────────
section('7. Voice presets — same line')
if (START <= 7) {
	const line = "Well, that's certainly one way to look at it."
	for (const voice of ['v2/en_speaker_0', 'v2/en_speaker_3', 'v2/en_speaker_6', 'v2/en_speaker_9']) {
		await say(line, voice)
	}
}

// ─── 7. Combined scene ─────────────────────────────────
section('8. Combined — a tense scene')
if (START <= 8) {
	await say('Something is wrong.', 'v2/en_speaker_9')
	await say('I can FEEL it.', 'v2/en_speaker_9')
	await say('[gasps] Run!', 'v2/en_speaker_9')
}

// ─── 9. Paragraph — voices 7-9 ─────────────────────────
// Pass voices as CLI args to override, e.g.:
//   node acting-demo-bark.mjs 9 v2/en_speaker_0 v2/en_speaker_2 v2/en_speaker_5
const PARA_VOICES = process.argv.slice(3).length
	? process.argv.slice(3)
	: ['v2/en_speaker_7', 'v2/en_speaker_8', 'v2/en_speaker_9']

const PARAGRAPH = 'It was a cold evening when the letter FINALLY arrived. '
	+ '[sighs] She had been waiting for months... not knowing whether the news would be good — or bad. '
	+ 'Her hands trembled as she tore open the envelope. '
	+ 'Inside was a single sheet of paper with just THREE words written on it. '
	+ '[gasps] She read them twice... then sat down slowly, and stared at the wall.'

section('9. Paragraph — voice comparison')
if (START <= 9) {
	for (const voice of PARA_VOICES) {
		process.stdout.write(`\n  — ${voice} —\n`)
		await say(PARAGRAPH, voice)
	}
}

tts.stop()
section('Done')