<?php
// api/tts.php
header('Content-Type: audio/mpeg');
header('Cache-Control: public, max-age=31536000');

$text = isset($_GET['text']) ? trim($_GET['text']) : '';
$lang = isset($_GET['lang']) ? trim($_GET['lang']) : 'en';

if (empty($text)) {
    http_response_code(400);
    exit;
}

$url = 'https://translate.google.com/translate_tts?ie=UTF-8&client=tw-ob&tl=' . urlencode($lang) . '&q=' . urlencode($text);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
    'Referer: https://translate.google.com/'
]);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$audioData = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

if ($httpCode === 200 && $audioData) {
    echo $audioData;
} else {
    http_response_code(500);
}
