frontend/src/App.jsx

import { useState } from "react";
import Recorder from "./components/Recorder";
import EmotionBars from "./components/EmotionBars";
import History from "./components/History";

const EMOTION_EMOJIS = {
  neutral: "😐",
  happy:   "😄",
  sad:     "😢",
  angry:   "😠",
};

export default function App() {
  const [result, setResult] = useState(null);   // { emotion, probs }
  const [history, setHistory] = useState([]);   // [{ emotion, timestamp }]

  const handleResult = (data) => {
    setResult(data);
    setHistory((prev) => [
      ...prev,
      {
        emotion: data.emotion,
        timestamp: new Date().toLocaleTimeString(),
      },
    ]);
  };

  return (
    <div style={styles.page}>
      <div style={styles.card}>
        {/* Header */}
        <div style={styles.header}>
          <h1 style={styles.title}>🎤 Speech Emotion Recognition</h1>
          <p style={styles.subtitle}>
            Record your voice and detect the emotion in real time
          </p>
        </div>

        {/* Current result */}
        {result && (
          <div style={styles.resultBox}>
            <span style={styles.resultEmoji}>
              {EMOTION_EMOJIS[result.emotion] || "🎤"}
            </span>
            <span style={styles.resultEmotion}>{result.emotion}</span>
          </div>
        )}

        {/* Recorder — mic button + waveform */}
        <Recorder onResult={handleResult} />

        {/* Probability bars */}
        <EmotionBars probs={result?.probs} />

        {/* Divider */}
        <hr style={styles.divider} />

        {/* Session history */}
        <History history={history} />
      </div>
    </div>
  );
}

const styles = {
  page: {
    minHeight: "100vh",
    backgroundColor: "#0f172a",
    display: "flex",
    alignItems: "center",
    justifyContent: "center",
    padding: "24px",
    fontFamily: "'Segoe UI', sans-serif",
  },
  card: {
    backgroundColor: "#1e293b",
    borderRadius: "20px",
    padding: "36px",
    width: "100%",
    maxWidth: "480px",
    boxShadow: "0 20px 60px rgba(0,0,0,0.5)",
  },
  header: {
    textAlign: "center",
    marginBottom: "28px",
  },
  title: {
    color: "#f1f5f9",
    fontSize: "22px",
    margin: "0 0 6px 0",
  },
  subtitle: {
    color: "#64748b",
    fontSize: "14px",
    margin: 0,
  },
  resultBox: {
    display: "flex",
    alignItems: "center",
    justifyContent: "center",
    gap: "10px",
    backgroundColor: "#0f172a",
    borderRadius: "12px",
    padding: "14px",
    marginBottom: "20px",
  },
  resultEmoji: {
    fontSize: "32px",
  },
  resultEmotion: {
    fontSize: "24px",
    fontWeight: 700,
    textTransform: "capitalize",
    color: "#6366f1",
  },
  divider: {
    border: "none",
    borderTop: "1px solid #334155",
    margin: "24px 0",
  },
};