import { useState, useRef } from 'react';
import { Volume2, Play, Download } from 'lucide-react';

export default function PocketTTS() {
  const [text, setText] = useState('Hello, this is a test of PocketTTS integration.');
  const [audioUrl, setAudioUrl] = useState('');
  const [loading, setLoading] = useState(false);
  const audioRef = useRef(null);

  const handleSynthesize = async () => {
    if (!text.trim()) return;
    setLoading(true);
    setAudioUrl('');

    try {
      const response = await fetch('/api/tts', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ text }),
      });

      if (!response.ok) throw new Error('TTS Generation failed');

      const blob = await response.blob();
      const url = URL.createObjectURL(blob);
      setAudioUrl(url);
    } catch (err) {
      console.error(err);
      alert('Failed to generate audio');
    } finally {
      setLoading(false);
    }
  };

  const playAudio = () => {
    if (audioRef.current) {
      audioRef.current.play();
    }
  };

  return (
    <div className="bg-slate-800 rounded-xl p-6 shadow-xl border border-slate-700">
      <div className="flex items-center gap-2 mb-4">
        <Volume2 className="w-5 h-5 text-blue-500" />
        <h2 className="text-lg font-semibold text-white">Pocket TTS</h2>
      </div>

      <div className="space-y-4">
        <div>
          <label className="block text-sm font-medium text-slate-400 mb-1">
            Text to Speech
          </label>
          <textarea
            value={text}
            onChange={(e) => setText(e.target.value)}
            className="w-full bg-slate-900 border border-slate-600 rounded-lg p-3 text-white placeholder-slate-500 focus:ring-2 focus:ring-blue-500 focus:border-transparent outline-none transition-all resize-none h-24"
          />
        </div>

        <div className="flex gap-2">
          <button
            onClick={handleSynthesize}
            disabled={loading}
            className="flex-1 bg-blue-600 hover:bg-blue-500 text-white font-medium py-2 rounded-lg transition-colors disabled:opacity-50 flex items-center justify-center gap-2"
          >
            {loading ? (
              <>
                <div className="w-4 h-4 border-2 border-white/30 border-t-white rounded-full animate-spin" />
                Synthesizing...
              </>
            ) : (
              'Generate Audio'
            )}
          </button>
          
          {audioUrl && (
            <button
              onClick={playAudio}
              className="bg-slate-700 hover:bg-slate-600 text-white p-2 rounded-lg transition-colors"
              title="Play Audio"
            >
              <Play className="w-5 h-5 fill-current" />
            </button>
          )}
        </div>

        {audioUrl && (
          <div className="bg-slate-900 p-3 rounded-lg border border-slate-700 flex items-center gap-3">
            <audio 
              ref={audioRef} 
              src={audioUrl} 
              controls 
              className="w-full h-8"
            />
             <a 
              href={audioUrl} 
              download="speech.wav"
              className="text-slate-400 hover:text-white transition-colors p-1"
              title="Download Audio"
            >
              <Download className="w-4 h-4" />
            </a>
          </div>
        )}
      </div>
    </div>
  );
}