/**
 * TTS HTTP client — speaks text via a running tts-server.mjs instance.
 *
 * Usage:
 *   const tts = new Tts_Client()
 *   await tts.speak('Hello world.')
 *   await tts.speak('Hello.', { audio_prompt: '/path/to/voice.wav' })
 *   const { voices, current } = await tts.list_voices()
 *   await tts.set_voice('rommie')
 *
 * The server URL defaults to TTS_URL env var, then http://192.168.2.99:11500.
 */

const DEFAULT_URL = process.env.TTS_URL ?? 'http://192.168.2.99:11500'

export class Tts_Client {
	constructor({ url = DEFAULT_URL } = {}) {
		this._url = url
	}

	async speak(text, opts = {}) {
		const res = await fetch(`${this._url}/speak`, {
			method:  'POST',
			headers: { 'Content-Type': 'application/json' },
			body:    JSON.stringify({ text, ...opts }),
		})
		if (!res.ok) {
			const data = await res.json().catch(() => ({}))
			throw new Error(data.error ?? `HTTP ${res.status}`)
		}
	}

	async list_voices() {
		const res = await fetch(`${this._url}/voices`)
		if (!res.ok) throw new Error(`HTTP ${res.status}`)
		return res.json()   // { voices: [{name, description, active}], current }
	}

	async chime(name) {
		const res = await fetch(`${this._url}/chime`, {
			method:  'POST',
			headers: { 'Content-Type': 'application/json' },
			body:    JSON.stringify({ name }),
		})
		if (!res.ok) {
			const data = await res.json().catch(() => ({}))
			throw new Error(data.error ?? `HTTP ${res.status}`)
		}
	}

	async set_voice(name) {
		const res = await fetch(`${this._url}/voice`, {
			method:  'POST',
			headers: { 'Content-Type': 'application/json' },
			body:    JSON.stringify({ name }),
		})
		if (!res.ok) {
			const data = await res.json().catch(() => ({}))
			throw new Error(data.error ?? `HTTP ${res.status}`)
		}
		return res.json()   // { ok, name, path }
	}
}