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import os
from fastapi import FastAPI
from fastapi.responses import HTMLResponse
import edge_tts
import asyncio
import tempfile
from pathlib import Path

app = FastAPI()

@app.get("/", response_class=HTMLResponse)
def read_root():
    return """
<!DOCTYPE html>
<html>
<head>
    <title>Microsoft Neural TTS Studio</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet">
    <style>
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { 
            font-family: 'Inter', sans-serif; 
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            max-width: 800px;
            width: 90%;
        }
        h1 { 
            color: #333; 
            margin-bottom: 30px; 
            text-align: center;
            font-size: 2.5rem;
            font-weight: 700;
        }
        .subtitle {
            text-align: center;
            color: #666;
            margin-bottom: 30px;
            font-size: 1.1rem;
        }
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .feature {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            padding: 20px;
            border-radius: 15px;
            text-align: center;
        }
        .feature h3 { margin-bottom: 10px; }
        .demo {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 20px;
            margin: 20px 0;
        }
        textarea {
            width: 100%;
            height: 100px;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            padding: 15px;
            font-size: 1rem;
            margin-bottom: 15px;
        }
        .voice-select {
            width: 100%;
            padding: 12px;
            border: 2px solid #e9ecef;
            border-radius: 8px;
            font-size: 1rem;
            margin-bottom: 15px;
            background: white;
            color: #333;
            max-height: 200px;
        }
        .voice-select optgroup {
            font-weight: 600;
            color: #667eea;
            font-size: 1.1rem;
            padding: 8px 0;
            border-bottom: 1px solid #e9ecef;
        }
        .voice-select option {
            padding: 8px 12px;
            font-size: 0.95rem;
        }
        .controls {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-bottom: 15px;
        }
        .slider-group {
            background: #f8f9fa;
            padding: 15px;
            border-radius: 8px;
        }
        .slider-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #333;
        }
        .slider {
            width: 100%;
            -webkit-appearance: none;
            height: 6px;
            border-radius: 3px;
            background: #e9ecef;
            outline: none;
        }
        .slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #667eea;
            cursor: pointer;
        }
        .slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #667eea;
            cursor: pointer;
        }
        .speak-btn {
            background: linear-gradient(135deg, #28a745, #20c997);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            display: block;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        .speak-btn:hover { transform: translateY(-2px); }
        .speak-btn:disabled { 
            opacity: 0.6; 
            cursor: not-allowed; 
            transform: none;
        }
        .status {
            text-align: center;
            margin-top: 15px;
            font-weight: 500;
            color: #666;
            min-height: 24px;
            padding: 8px;
            border-radius: 6px;
            background: #f8f9fa;
        }
        .status.error {
            background: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        .status.success {
            background: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        .status.loading {
            background: #d1ecf1;
            color: #0c5460;
            border: 1px solid #bee5eb;
        }
        .audio-player {
            margin-top: 20px;
            text-align: center;
        }
        audio {
            width: 100%;
            border-radius: 8px;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>๐ŸŽ™๏ธ Microsoft Neural TTS Studio</h1>
        <p class="subtitle">Professional Text-to-Speech with 200+ Neural Voices in 30+ Languages</p>
        
        <div class="features">
            <div class="feature">
                <h3>๐ŸŒ 30+ Languages</h3>
                <p>Dutch, English, French, German, Spanish, Italian, Portuguese, Asian, European and more</p>
            </div>
            <div class="feature">
                <h3>๐ŸŽค 200+ Voices</h3>
                <p>Male, Female, Regional variants with Microsoft neural technology</p>
            </div>
            <div class="feature">
                <h3>โšก Fast & Free</h3>
                <p>No API keys required, instant synthesis, high-quality output</p>
            </div>
        </div>
        
        <div class="demo">
            <h3>Try It Now</h3>
            <textarea id="text-input" placeholder="Type your text here...">Hello, this is a demonstration of Microsoft Neural TTS Studio! This is a professional text-to-speech application with 200+ high-quality neural voices in 30+ languages. Try different voices and languages to experience the power of Microsoft neural technology!</textarea>
            
            <select id="voice-select" class="voice-select">
                <!-- Dutch Voices -->
                <optgroup label="๐Ÿ‡ณ๐Ÿ‡ฑ Dutch">
                    <option value="nl-NL-FennaNeural">Fenna (Female)</option>
                    <option value="nl-NL-ColetteNeural">Colette (Female)</option>
                    <option value="nl-NL-MaartenNeural">Maarten (Male)</option>
                    <option value="nl-BE-DenaNeural">Dena (Female, Flemish)</option>
                    <option value="nl-BE-ArnaudNeural">Arnaud (Male, Flemish)</option>
                </optgroup>
                
                <!-- English Voices -->
                <optgroup label="๐Ÿ‡บ๐Ÿ‡ธ English">
                    <option value="en-US-JennyNeural">Jenny (Female, US)</option>
                    <option value="en-US-GuyNeural">Guy (Male, US)</option>
                    <option value="en-US-AriaNeural">Aria (Female, US)</option>
                    <option value="en-US-DavisNeural">Davis (Male, US)</option>
                    <option value="en-US-SaraNeural">Sara (Female, US)</option>
                    <option value="en-US-TonyNeural">Tony (Male, US)</option>
                    <option value="en-US-NancyNeural">Nancy (Female, US)</option>
                    <option value="en-US-AmberNeural">Amber (Female, US)</option>
                    <option value="en-US-AnaNeural">Ana (Female, US)</option>
                    <option value="en-US-BrandonNeural">Brandon (Male, US)</option>
                    <option value="en-US-ChristopherNeural">Christopher (Male, US)</option>
                    <option value="en-US-CoraNeural">Cora (Female, US)</option>
                    <option value="en-US-ElizabethNeural">Elizabeth (Female, US)</option>
                    <option value="en-US-EricNeural">Eric (Male, US)</option>
                    <option value="en-US-MonicaNeural">Monica (Female, US)</option>
                    <option value="en-GB-SoniaNeural">Sonia (Female, UK)</option>
                    <option value="en-GB-RyanNeural">Ryan (Male, UK)</option>
                    <option value="en-GB-LibbyNeural">Libby (Female, UK)</option>
                    <option value="en-GB-ThomasNeural">Thomas (Male, UK)</option>
                    <option value="en-GB-MiaNeural">Mia (Female, UK)</option>
                    <option value="en-GB-EmmaNeural">Emma (Female, UK)</option>
                    <option value="en-GB-OliverNeural">Oliver (Male, UK)</option>
                    <option value="en-GB-AvaNeural">Ava (Female, UK)</option>
                    <option value="en-GB-RebeccaNeural">Rebecca (Female, UK)</option>
                    <option value="en-AU-NatashaNeural">Natasha (Female, Australian)</option>
                    <option value="en-AU-WilliamNeural">William (Male, Australian)</option>
                    <option value="en-AU-DaisyNeural">Daisy (Female, Australian)</option>
                    <option value="en-CA-ClaraNeural">Clara (Female, Canadian)</option>
                    <option value="en-CA-LiamNeural">Liam (Male, Canadian)</option>
                    <option value="en-CA-HeatherNeural">Heather (Female, Canadian)</option>
                    <option value="en-IN-NeerjaNeural">Neerja (Female, Indian)</option>
                    <option value="en-IN-PrabhatNeural">Prabhat (Male, Indian)</option>
                    <option value="en-IN-SwaraNeural">Swara (Female, Indian)</option>
                    <option value="en-ZA-LeahNeural">Leah (Female, South African)</option>
                    <option value="en-ZA-LukeNeural">Luke (Male, South African)</option>
                </optgroup>
                
                <!-- French Voices -->
                <optgroup label="๐Ÿ‡ซ๐Ÿ‡ท French">
                    <option value="fr-FR-DeniseNeural">Denise (Female)</option>
                    <option value="fr-FR-HenriNeural">Henri (Male)</option>
                    <option value="fr-FR-AlainNeural">Alain (Male)</option>
                    <option value="fr-FR-ArielleNeural">Arielle (Female)</option>
                    <option value="fr-FR-VivienneNeural">Vivienne (Female)</option>
                    <option value="fr-FR-CelesteNeural">Celeste (Female)</option>
                    <option value="fr-FR-ClaudineNeural">Claudine (Female)</option>
                    <option value="fr-FR-JacquelineNeural">Jacqueline (Female)</option>
                    <option value="fr-FR-JosephineNeural">Josephine (Female)</option>
                    <option value="fr-FR-YvesNeural">Yves (Male)</option>
                    <option value="fr-FR-PaulNeural">Paul (Male)</option>
                    <option value="fr-FR-RemyNeural">Remy (Male)</option>
                    <option value="fr-FR-MarcelNeural">Marcel (Male)</option>
                    <option value="fr-FR-LouiseNeural">Louise (Female)</option>
                    <option value="fr-FR-MargotNeural">Margot (Female)</option>
                    <option value="fr-BE-CharlineNeural">Charline (Female, Belgian)</option>
                    <option value="fr-CA-SylvieNeural">Sylvie (Female, Canadian)</option>
                    <option value="fr-CA-AntoineNeural">Antoine (Male, Canadian)</option>
                    <option value="fr-CA-JeanNeural">Jean (Male, Canadian)</option>
                    <option value="fr-CH-AliciaNeural">Alicia (Female, Swiss)</option>
                    <option value="fr-CH-FabienNeural">Fabien (Male, Swiss)</option>
                    <option value="fr-CH-RaphaelNeural">Raphael (Male, Swiss)</option>
                </optgroup>
                
                <!-- German Voices -->
                <optgroup label="๐Ÿ‡ฉ๐Ÿ‡ช German">
                    <option value="de-DE-KatjaNeural">Katja (Female)</option>
                    <option value="de-DE-ConradNeural">Conrad (Male)</option>
                    <option value="de-DE-AmalaNeural">Amala (Female)</option>
                    <option value="de-DE-BerndNeural">Bernd (Male)</option>
                    <option value="de-DE-ChristophNeural">Christoph (Male)</option>
                    <option value="de-DE-ElkeNeural">Elke (Female)</option>
                    <option value="de-DE-GiselaNeural">Gisela (Female)</option>
                    <option value="de-DE-KillianNeural">Killian (Male)</option>
                    <option value="de-DE-SeraphinaNeural">Seraphina (Female)</option>
                    <option value="de-DE-LouisaNeural">Louisa (Female)</option>
                    <option value="de-DE-MajaNeural">Maja (Female)</option>
                    <option value="de-DE-FlorianNeural">Florian (Male)</option>
                    <option value="de-DE-SabineNeural">Sabine (Female)</option>
                    <option value="de-DE-GerhardNeural">Gerhard (Male)</option>
                    <option value="de-DE-KlaraNeural">Klara (Female)</option>
                    <option value="de-DE-TanjaNeural">Tanja (Female)</option>
                    <option value="de-AT-IngridNeural">Ingrid (Female, Austrian)</option>
                    <option value="de-AT-JonasNeural">Jonas (Male, Austrian)</option>
                    <option value="de-CH-LeniNeural">Leni (Female, Swiss)</option>
                    <option value="de-CH-JanNeural">Jan (Male, Swiss)</option>
                </optgroup>
                
                <!-- Spanish Voices -->
                <optgroup label="๐Ÿ‡ช๐Ÿ‡ธ Spanish">
                    <option value="es-ES-ElviraNeural">Elvira (Female)</option>
                    <option value="es-ES-AlvaroNeural">Alvaro (Male)</option>
                    <option value="es-ES-AbrilNeural">Abril (Female)</option>
                    <option value="es-ES-ArnauNeural">Arnau (Male)</option>
                    <option value="es-ES-DarioNeural">Dario (Male)</option>
                    <option value="es-ES-EliasNeural">Elias (Male)</option>
                    <option value="es-ES-EstrellaNeural">Estrella (Female)</option>
                    <option value="es-ES-XimenaNeural">Ximena (Female)</option>
                    <option value="es-ES-LauraNeural">Laura (Female)</option>
                    <option value="es-ES-IreneNeural">Irene (Female)</option>
                    <option value="es-ES-SofiaNeural">Sofia (Female)</option>
                    <option value="es-ES-PabloNeural">Pablo (Male)</option>
                    <option value="es-ES-ManuelNeural">Manuel (Male)</option>
                    <option value="es-ES-PedroNeural">Pedro (Male)</option>
                    <option value="es-MX-DaliaNeural">Dalia (Female, Mexican)</option>
                    <option value="es-MX-JorgeNeural">Jorge (Male, Mexican)</option>
                    <option value="es-MX-LuciaNeural">Lucia (Female, Mexican)</option>
                    <option value="es-AR-AlejandraNeural">Alejandra (Female, Argentine)</option>
                    <option value="es-AR-CastiNeural">Casti (Male, Argentine)</option>
                    <option value="es-CO-SalomeNeural">Salome (Female, Colombian)</option>
                    <option value="es-CO-GonzaloNeural">Gonzalo (Male, Colombian)</option>
                </optgroup>
                
                <!-- Italian Voices -->
                <optgroup label="๐Ÿ‡ฎ๐Ÿ‡น Italian">
                    <option value="it-IT-ElsaNeural">Elsa (Female)</option>
                    <option value="it-IT-DiegoNeural">Diego (Male)</option>
                    <option value="it-IT-FabiolaNeural">Fabiola (Female)</option>
                    <option value="it-IT-GiuseppeNeural">Giuseppe (Male)</option>
                    <option value="it-IT-IsabellaNeural">Isabella (Female)</option>
                    <option value="it-IT-AlessandroNeural">Alessandro (Male)</option>
                    <option value="it-IT-BenedettaNeural">Benedetta (Female)</option>
                    <option value="it-IT-FrancescaNeural">Francesca (Female)</option>
                    <option value="it-IT-MarcoNeural">Marco (Male)</option>
                    <option value="it-IT-PaolaNeural">Paola (Female)</option>
                </optgroup>
                
                <!-- Portuguese Voices -->
                <optgroup label="๐Ÿ‡ง๐Ÿ‡ท Portuguese">
                    <option value="pt-BR-FranciscaNeural">Francisca (Female, Brazilian)</option>
                    <option value="pt-BR-AntonioNeural">Antonio (Male, Brazilian)</option>
                    <option value="pt-BR-BrendaNeural">Brenda (Female, Brazilian)</option>
                    <option value="pt-BR-ValerioNeural">Valerio (Male, Brazilian)</option>
                    <option value="pt-BR-ThalitaNeural">Thalita (Female, Brazilian)</option>
                    <option value="pt-BR-YaraNeural">Yara (Female, Brazilian)</option>
                    <option value="pt-BR-CamilaNeural">Camila (Female, Brazilian)</option>
                    <option value="pt-BR-JulianoNeural">Juliano (Male, Brazilian)</option>
                    <option value="pt-BR-LeandroNeural">Leandro (Male, Brazilian)</option>
                    <option value="pt-BR-NicolauNeural">Nicolau (Male, Brazilian)</option>
                    <option value="pt-PT-RaquelNeural">Raquel (Female, Portuguese)</option>
                    <option value="pt-PT-DuarteNeural">Duarte (Male, Portuguese)</option>
                    <option value="pt-PT-MariaNeural">Maria (Female, Portuguese)</option>
                </optgroup>
                
                <!-- Asian Languages -->
                <optgroup label="๐ŸŒ Asian Languages">
                    <option value="zh-CN-XiaoxiaoNeural">Xiaoxiao (Female, Chinese)</option>
                    <option value="zh-CN-YunyangNeural">Yunyang (Male, Chinese)</option>
                    <option value="zh-CN-XiaoyiNeural">Xiaoyi (Female, Chinese)</option>
                    <option value="zh-CN-YunjianNeural">Yunjian (Male, Chinese)</option>
                    <option value="zh-CN-XiaochenNeural">Xiaochen (Female, Chinese)</option>
                    <option value="zh-CN-XiaoxuanNeural">Xiaoxuan (Female, Chinese)</option>
                    <option value="zh-CN-XiaomengNeural">Xiaomeng (Female, Chinese)</option>
                    <option value="zh-CN-XiaoyanNeural">Xiaoyan (Female, Chinese)</option>
                    <option value="zh-CN-XiaoyouNeural">Xiaoyou (Female, Chinese)</option>
                    <option value="zh-CN-XiaoyuNeural">Xiaoyu (Female, Chinese)</option>
                    <option value="zh-CN-HsiaochenNeural">Hsiaochen (Female, Chinese)</option>
                    <option value="zh-CN-HsiaochengNeural">Hsiaocheng (Male, Chinese)</option>
                    <option value="zh-CN-HsiaoyuNeural">Hsiaoyu (Female, Chinese)</option>
                    <option value="ja-JP-NanamiNeural">Nanami (Female, Japanese)</option>
                    <option value="ja-JP-KeitaNeural">Keita (Male, Japanese)</option>
                    <option value="ja-JP-AoiNeural">Aoi (Female, Japanese)</option>
                    <option value="ja-JP-NaomiNeural">Naomi (Female, Japanese)</option>
                    <option value="ja-JP-DaichiNeural">Daichi (Male, Japanese)</option>
                    <option value="ja-JP-MasaruNeural">Masaru (Male, Japanese)</option>
                    <option value="ko-KR-SunHiNeural">SunHi (Female, Korean)</option>
                    <option value="ko-KR-InJoonNeural">InJoon (Male, Korean)</option>
                    <option value="ko-KR-BongJinNeural">BongJin (Male, Korean)</option>
                    <option value="ko-KR-GookMinNeural">GookMin (Male, Korean)</option>
                    <option value="ko-KR-JiMinNeural">JiMin (Female, Korean)</option>
                    <option value="ko-KR-SeoHyeonNeural">SeoHyeon (Female, Korean)</option>
                    <option value="ko-KR-HyunsuNeural">Hyunsu (Male, Korean)</option>
                    <option value="ko-KR-SoonBokNeural">SoonBok (Male, Korean)</option>
                    <option value="hi-IN-SwaraNeural">Swara (Female, Hindi)</option>
                    <option value="hi-IN-MadhurNeural">Madhur (Male, Hindi)</option>
                    <option value="hi-IN-AnjaliNeural">Anjali (Female, Hindi)</option>
                    <option value="hi-IN-RajNeural">Raj (Male, Hindi)</option>
                    <option value="he-IL-AvriNeural">Avri (Male, Hebrew)</option>
                    <option value="he-IL-HilaNeural">Hila (Female, Hebrew)</option>
                    <option value="ar-SA-ZariyahNeural">Zariyah (Female, Arabic)</option>
                    <option value="ar-SA-HamedNeural">Hamed (Male, Arabic)</option>
                    <option value="ar-SA-FatimaNeural">Fatima (Female, Arabic)</option>
                    <option value="ar-SA-AliNeural">Ali (Male, Arabic)</option>
                    <option value="ar-SA-OmarNeural">Omar (Male, Arabic)</option>
                </optgroup>
                
                <!-- European Languages -->
                <optgroup label="๐ŸŒ European Languages">
                    <option value="pl-PL-ZofiaNeural">Zofia (Female, Polish)</option>
                    <option value="pl-PL-JacekNeural">Jacek (Male, Polish)</option>
                    <option value="pl-PL-EwaNeural">Ewa (Female, Polish)</option>
                    <option value="pl-PL-MarekNeural">Marek (Male, Polish)</option>
                    <option value="pl-PL-JuliaNeural">Julia (Female, Polish)</option>
                    <option value="pl-PL-JanNeural">Jan (Male, Polish)</option>
                    <option value="pl-PL-MajaNeural">Maja (Female, Polish)</option>
                    <option value="ro-RO-AlinaNeural">Alina (Female, Romanian)</option>
                    <option value="ro-RO-EmilNeural">Emil (Male, Romanian)</option>
                    <option value="hu-HU-NoemiNeural">Noemi (Female, Hungarian)</option>
                    <option value="hu-HU-TamasNeural">Tamas (Male, Hungarian)</option>
                    <option value="el-GR-AthinaNeural">Athina (Female, Greek)</option>
                    <option value="el-GR-NestorasNeural">Nestoras (Male, Greek)</option>
                    <option value="fi-FI-SelmaNeural">Selma (Female, Finnish)</option>
                    <option value="fi-FI-HarriNeural">Harri (Male, Finnish)</option>
                    <option value="fi-FI-SeljaNeural">Selja (Female, Finnish)</option>
                    <option value="sv-SE-SofieNeural">Sofie (Female, Swedish)</option>
                    <option value="sv-SE-MattiasNeural">Mattias (Male, Swedish)</option>
                    <option value="sv-SE-AstridNeural">Astrid (Female, Swedish)</option>
                    <option value="da-DK-ChristelNeural">Christel (Female, Danish)</option>
                    <option value="da-DK-JeppeNeural">Jeppe (Male, Danish)</option>
                    <option value="da-DK-MetteNeural">Mette (Female, Danish)</option>
                    <option value="nb-NO-PernilleNeural">Pernille (Female, Norwegian)</option>
                    <option value="nb-NO-FinnNeural">Finn (Male, Norwegian)</option>
                    <option value="nb-NO-IselinNeural">Iselin (Female, Norwegian)</option>
                    <option value="ru-RU-SvetlanaNeural">Svetlana (Female, Russian)</option>
                    <option value="ru-RU-DmitryNeural">Dmitry (Male, Russian)</option>
                    <option value="ru-RU-DariyaNeural">Dariya (Female, Russian)</option>
                    <option value="ru-RU-PavelNeural">Pavel (Male, Russian)</option>
                    <option value="tr-TR-EmelNeural">Emel (Female, Turkish)</option>
                    <option value="tr-TR-AhmetNeural">Ahmet (Male, Turkish)</option>
                    <option value="tr-TR-SultanNeural">Sultan (Male, Turkish)</option>
                </optgroup>
            </select>
            
            <div class="controls">
                <div class="slider-group">
                    <label>Speed: <span id="speed-value">+0%</span></label>
                    <input type="range" id="speed-slider" class="slider" min="-50" max="50" value="0">
                </div>
                <div class="slider-group">
                    <label>Pitch: <span id="pitch-value">+0Hz</span></label>
                    <input type="range" id="pitch-slider" class="slider" min="-50" max="50" value="0">
                </div>
            </div>
            
            <button class="speak-btn" id="speak-btn" onclick="speak()">๐Ÿ”Š Speak Text</button>
            <div class="status" id="status">Ready to speak</div>
            
            <div class="audio-player" id="audio-player" style="display: none;">
                <audio id="audio-element" controls></audio>
            </div>
        </div>
    </div>

    <script>
        // Update slider values
        document.getElementById('speed-slider').addEventListener('input', function() {
            const value = this.value;
            document.getElementById('speed-value').textContent = value >= 0 ? `+${value}%` : `${value}%`;
        });
        
        document.getElementById('pitch-slider').addEventListener('input', function() {
            const value = this.value;
            document.getElementById('pitch-value').textContent = value >= 0 ? `+${value}Hz` : `${value}Hz`;
        });

        async function speak() {
            const text = document.getElementById('text-input').value;
            const voice = document.getElementById('voice-select').value;
            const speed = document.getElementById('speed-slider').value;
            const pitch = document.getElementById('pitch-slider').value;
            
            if (!text.trim()) {
                updateStatus('Please enter some text', 'error');
                return;
            }
            
            if (text.length > 5000) {
                updateStatus('Text too long! Maximum 5000 characters allowed.', 'error');
                return;
            }
            
            const button = document.getElementById('speak-btn');
            button.textContent = 'โณ Generating...';
            button.disabled = true;
            updateStatus('Generating speech...', 'loading');
            
            try {
                const response = await fetch('/synthesize', {
                    method: 'POST',
                    headers: { 
                        'Content-Type': 'application/json',
                        'Accept': 'audio/mpeg'
                    },
                    body: JSON.stringify({ 
                        text, 
                        voice, 
                        rate: speed >= 0 ? `+${speed}%` : `${speed}%`,
                        pitch: pitch >= 0 ? `+${pitch}Hz` : `${pitch}Hz`
                    })
                });
                
                if (response.ok) {
                    const contentType = response.headers.get('content-type');
                    if (contentType && contentType.includes('audio/mpeg')) {
                        const audioBlob = await response.blob();
                        const audioUrl = URL.createObjectURL(audioBlob);
                        
                        const audioElement = document.getElementById('audio-element');
                        audioElement.src = audioUrl;
                        
                        document.getElementById('audio-player').style.display = 'block';
                        audioElement.play();
                        
                        updateStatus('Playing audio...', 'success');
                    } else {
                        const errorData = await response.json();
                        updateStatus(`Error: ${errorData.error || 'Unknown error'}`, 'error');
                    }
                } else {
                    const errorData = await response.json();
                    updateStatus(`Speech synthesis failed: ${errorData.error || 'Unknown error'}`, 'error');
                }
            } catch (error) {
                updateStatus(`Network error: ${error.message}`, 'error');
                console.error('Synthesis error:', error);
            } finally {
                button.textContent = '๐Ÿ”Š Speak Text';
                button.disabled = false;
            }
        }
        
        function updateStatus(message, type) {
            const statusElement = document.getElementById('status');
            statusElement.textContent = message;
            statusElement.className = 'status';
            if (type) {
                statusElement.classList.add(type);
            }
        }
        
        // Auto-play when audio ends
        document.getElementById('audio-element').addEventListener('ended', function() {
            updateStatus('Ready to speak', 'normal');
        });
    </script>
</body>
</html>
"""

@app.post("/synthesize")
async def synthesize(request):
    try:
        data = await request.json()
        text = data.get("text", "")
        voice = data.get("voice", "en-US-JennyNeural")
        rate = data.get("rate", "+0%")
        pitch = data.get("pitch", "+0Hz")
        
        if not text:
            return {"error": "Text is required"}
        
        # Validate text length (Edge TTS has limits)
        if len(text) > 5000:
            return {"error": "Text too long. Maximum 5000 characters allowed."}
        
        # Validate voice format
        if not voice or not isinstance(voice, str):
            return {"error": "Invalid voice format"}
        
        # Create communicate object with error handling
        try:
            communicate = edge_tts.Communicate(text, voice, rate=rate, pitch=pitch)
        except Exception as e:
            return {"error": f"Voice initialization failed: {str(e)}"}
        
        # Generate audio with timeout and error handling
        try:
            audio_data = await communicate.get_audio_data()
            
            if not audio_data:
                return {"error": "No audio data generated"}
            
            # Return audio as response
            from fastapi.responses import Response
            return Response(
                content=audio_data,
                media_type="audio/mpeg",
                headers={
                    "Content-Disposition": "inline; filename=speech.mp3",
                    "Cache-Control": "no-cache"
                }
            )
            
        except Exception as e:
            return {"error": f"Audio generation failed: {str(e)}"}
            
    except Exception as e:
        return {"error": f"Request processing failed: {str(e)}"}

@app.get("/voices")
async def get_voices():
    """Get available voices for debugging"""
    try:
        voices = await edge_tts.list_voices()
        return {"voices": voices[:50]}  # Return first 50 voices for testing
    except Exception as e:
        return {"error": f"Failed to get voices: {str(e)}"}

@app.get("/test")
async def test_endpoint():
    """Test endpoint to verify server is working"""
    return {"status": "ok", "message": "Microsoft Neural TTS Studio is working!"}