import React, { useState } from 'react';

interface Props {
  videoId: string;
  onConversionDone: () => void;
}

export default function HlsConversionStatus({ videoId, onConversionDone }: Props) {
  const [status, setStatus] = useState<'idle' | 'converting' | 'done' | 'error'>('idle');
  const [percent, setPercent] = useState(0);

  const startConversion = async () => {
    setStatus('converting');
    await fetch(`/api/hls/${videoId}/convert`, { method: 'POST' });

    const es = new EventSource(`/api/hls/${videoId}/progress`);
    es.onmessage = (e) => {
      try {
        const data = JSON.parse(e.data);
        setPercent(Math.round(data.percent ?? 0));
        setStatus(data.status);
        if (data.status === 'done') {
          es.close();
          onConversionDone();
        } else if (data.status === 'error') {
          es.close();
        }
      } catch {
        // ignore parse errors
      }
    };
    es.onerror = () => {
      es.close();
      setStatus('error');
    };
  };

  return (
    <div className="flex items-center gap-2 text-sm">
      {status === 'idle' && (
        <button
          onClick={startConversion}
          className="bg-green-700 hover:bg-green-600 text-white px-3 py-1.5 rounded"
        >
          HLS 변환
        </button>
      )}
      {status === 'converting' && (
        <div className="flex items-center gap-2">
          <div className="w-24 bg-gray-700 rounded-full h-2">
            <div
              className="bg-green-500 h-2 rounded-full transition-all"
              style={{ width: `${percent}%` }}
            />
          </div>
          <span className="text-gray-400">{percent}%</span>
        </div>
      )}
      {status === 'done' && <span className="text-green-400">HLS 준비됨</span>}
      {status === 'error' && <span className="text-red-400">변환 실패</span>}
    </div>
  );
}