import { useState, useCallback, useRef } from 'react';
import JarvisOrb from './components/JarvisOrb';
import ConversationOverlay from './components/ConversationOverlay';
import ProjectCardsDrawer from './components/ProjectCardsDrawer';
import useOperatorSSE from './hooks/useOperatorSSE';
import useWakeWord from './hooks/useWakeWord';
import useSpeechRecognition from './hooks/useSpeechRecognition';
import useTTS from './hooks/useTTS';

const PROJECTS = [
  { id: 'school', name: 'Master IA \u2014 Sorbonne', contact: 'prof.martinez@sorbonne.fr', color: '#4285f4' },
  { id: 'company', name: 'Alternance \u2014 BNP Paribas', contact: 'sophie.renard@bnpparibas.com', color: '#ea4335' },
  { id: 'startup', name: 'Side Project \u2014 NoctaAI', contact: 'yassine@noctaai.com', color: '#fbbc04' },
];

export default function App() {
  const { sendChat } = useOperatorSSE();
  const { speak } = useTTS();

  // Start directly in IDLE — no scan needed
  const [phase, setPhase] = useState('IDLE');
  const [messages, setMessages] = useState([]);
  const phaseRef = useRef(phase);
  phaseRef.current = phase;

  const [inputText, setInputText] = useState('');
  const [showTranscript, setShowTranscript] = useState(false);

  const handleWakeWord = useCallback(() => {
    if (phaseRef.current === 'IDLE') setPhase('LISTENING');
  }, []);

  const { micActive, micError, requestMic } = useWakeWord({
    enabled: phase === 'IDLE',
    onDetected: handleWakeWord,
  });

  const handleOrbClick = useCallback(() => {
    if (phaseRef.current === 'IDLE') {
      setPhase('LISTENING');
    }
  }, []);

  const handleUserSaid = useCallback(async (text) => {
    if (!text.trim()) return;

    const bye = text.toLowerCase();
    if (bye.includes('merci') || bye.includes("c'est bon") || bye.includes('a plus') || bye.includes('au revoir')) {
      setMessages(prev => [...prev, { role: 'user', text }]);
      const farewell = "Ok, je reste la si tu as besoin. Dis 'Oppy' quand tu veux.";
      setMessages(prev => [...prev, { role: 'assistant', text: farewell }]);
      setPhase('SPEAKING');
      await speak(farewell);
      setPhase('IDLE');
      return;
    }

    setMessages(prev => [...prev, { role: 'user', text }]);
    setPhase('SPEAKING');
    const acks = [
      "D'accord, donne-moi un petit instant.",
      "Je regarde ca tout de suite.",
      "Laisse-moi verifier.",
      "Une seconde, je cherche.",
    ];
    const ack = acks[Math.floor(Math.random() * acks.length)];
    const ackDone = speak(ack);
    const replyPromise = sendChat(text);
    await ackDone;
    setPhase('THINKING');

    try {
      const reply = await replyPromise;
      if (reply) {
        setMessages(prev => [...prev, { role: 'assistant', text: reply }]);
        setPhase('SPEAKING');
        await speak(reply);
        if (phaseRef.current === 'SPEAKING') setPhase('LISTENING');
      } else {
        setPhase('LISTENING');
      }
    } catch (err) {
      console.error('Chat error:', err);
      setPhase('LISTENING');
    }
  }, [sendChat, speak]);

  const handleTimeout = useCallback(() => {
    if (phaseRef.current === 'LISTENING') setPhase('IDLE');
  }, []);

  const { transcript } = useSpeechRecognition({
    enabled: phase === 'LISTENING',
    onResult: handleUserSaid,
    onTimeout: handleTimeout,
    timeoutMs: 20000,
  });

  const handleSubmit = (e) => {
    e.preventDefault();
    const text = inputText.trim();
    if (!text || phase === 'THINKING' || phase === 'SPEAKING') return;
    setInputText('');
    handleUserSaid(text);
  };

  let label = '';
  if (phase === 'IDLE') {
    if (micError) label = "Clique sur l'orbe pour autoriser le micro";
    else if (!micActive) label = "Clique sur l'orbe pour activer le micro";
    else label = "Micro actif — dis 'Oppy' pour commencer";
  }
  else if (phase === 'LISTENING') label = transcript || "Je t'ecoute...";
  else if (phase === 'THINKING') label = 'Oppy reflechit...';
  else if (phase === 'SPEAKING') label = '';

  const micDotColor = phase === 'IDLE' && micActive ? '#34a853' : phase === 'IDLE' && micError ? '#ea4335' : null;

  return (
    <div style={{
      minHeight: '100vh',
      display: 'flex',
      flexDirection: 'column',
      alignItems: 'center',
      justifyContent: 'center',
      padding: '40px 20px 100px',
      position: 'relative',
    }}>
      {/* Logo */}
      <div style={{
        position: 'fixed',
        top: 0,
        left: 0,
        padding: '20px 24px',
        zIndex: 10,
        display: 'flex',
        alignItems: 'center',
        gap: '10px',
      }}>
        <span style={{
          fontSize: '20px',
          background: 'linear-gradient(135deg, #4285f4, #a142f4, #f439a0)',
          WebkitBackgroundClip: 'text',
          WebkitTextFillColor: 'transparent',
        }}>
          &#10022;
        </span>
        <h1 style={{
          fontSize: '16px',
          fontWeight: 500,
          color: '#1f1f1f',
          margin: 0,
          letterSpacing: '0.5px',
        }}>
          Oppy
        </h1>
      </div>

      {/* Orb */}
      <JarvisOrb phase={phase} onClick={handleOrbClick} isLoading={false} />

      {/* Mic status dot */}
      {micDotColor && (
        <div style={{
          marginTop: '12px',
          display: 'flex',
          alignItems: 'center',
          gap: '6px',
        }}>
          <div style={{
            width: '8px', height: '8px', borderRadius: '50%',
            background: micDotColor,
            animation: micActive ? 'pulse 2s infinite' : 'none',
          }} />
          <span style={{ fontSize: '11px', color: micDotColor, letterSpacing: '0.5px' }}>
            {micActive ? 'Micro actif' : 'Micro bloque'}
          </span>
        </div>
      )}

      {/* Phase label */}
      <div style={{
        marginTop: micDotColor ? '8px' : '24px',
        fontSize: '14px',
        color: phase === 'LISTENING' && transcript ? '#4285f4' : '#5f6368',
        textAlign: 'center',
        minHeight: '20px',
        animation: phase === 'THINKING' ? 'pulse 1.5s infinite' : 'none',
        fontWeight: phase === 'LISTENING' && transcript ? 500 : 400,
      }}>
        {label}
      </div>

      {/* Transcript toggle */}
      {messages.length > 0 && (
        <div style={{ marginTop: '16px', textAlign: 'center' }}>
          <button
            onClick={() => setShowTranscript(!showTranscript)}
            style={{
              background: showTranscript ? '#f1f3f4' : 'transparent',
              border: '1px solid #e0e0e0',
              color: '#5f6368',
              padding: '6px 16px',
              borderRadius: '16px',
              fontFamily: 'inherit',
              fontSize: '12px',
              cursor: 'pointer',
              transition: 'all 0.2s',
            }}
          >
            {showTranscript ? 'Masquer la transcription' : 'Afficher la transcription'}
          </button>
        </div>
      )}
      {showTranscript && (
        <div style={{ marginTop: '12px', width: '100%', maxWidth: '600px' }}>
          <ConversationOverlay messages={messages} isThinking={phase === 'THINKING'} />
        </div>
      )}

      {/* Text input */}
      <form
        onSubmit={handleSubmit}
        style={{
          position: 'fixed',
          bottom: '50px',
          left: '50%',
          transform: 'translateX(-50%)',
          width: '100%',
          maxWidth: '500px',
          display: 'flex',
          gap: '8px',
          padding: '0 20px',
          zIndex: 15,
        }}
      >
        <input
          type="text"
          value={inputText}
          onChange={(e) => setInputText(e.target.value)}
          placeholder="Ecris ta question ici..."
          style={{
            flex: 1,
            background: '#f8f9fa',
            border: '1px solid #e0e0e0',
            borderRadius: '24px',
            padding: '12px 20px',
            color: '#1f1f1f',
            fontFamily: 'inherit',
            fontSize: '14px',
            outline: 'none',
          }}
        />
        <button
          type="submit"
          disabled={!inputText.trim() || phase === 'THINKING'}
          style={{
            background: inputText.trim() ? '#4285f4' : '#f1f3f4',
            color: inputText.trim() ? '#fff' : '#9aa0a6',
            border: 'none',
            borderRadius: '24px',
            padding: '12px 20px',
            fontFamily: 'inherit',
            fontSize: '13px',
            fontWeight: 500,
            cursor: !inputText.trim() ? 'not-allowed' : 'pointer',
            transition: 'all 0.2s',
          }}
        >
          Envoyer
        </button>
      </form>

      {/* Project cards drawer */}
      <ProjectCardsDrawer projects={PROJECTS} statuses={{}} />
    </div>
  );
}