const BaseEngine=require('../BaseEngine');
const fetch = require('node-fetch');
const querystring = require('querystring');

module.exports= class extends BaseEngine {
	constructor() {
		super("IBM Watson TTS","ogg");
		this.voices={
			'Michael': 'en-US_MichaelV3Voice',
			'Allison': 'en-US_AllisonV3Voice',
			'Kevin': 'en-US_KevinV3Voice',
		};
	}
	getDefaultVoice() {
		return 'Michael';
	}
	async getSpeech(text, voice=this.getSpeechVoice(), params={}) {
		const url = process.env.watsonURL+"/v1/synthesize?voice="+this.getInternalVoiceName(voice);
		let buff=new Buffer('apikey:'+process.env.watsonAPIKey);
		let b64auth=buff.toString('base64');
		const authorization='Basic '+b64auth;
		const opts={
			method: "post",
			headers: {
				'Content-Type': 'application/json',
				'Authorization': authorization
			},
			body: JSON.stringify({
				text: text
			})
		};
		return fetch(url,opts);
	}
};