import React from 'react';
import { Article, PlaybackStatus } from '../types';
import { Play, Pause, Loader2, AlertCircle, FileText, GripVertical, SkipForward } from 'lucide-react';

interface QueueItemProps {
  article: Article;
  isActive: boolean;
  isPlaying: boolean;
  onPlay: () => void;
  onPause: () => void;
  onRemove: () => void;
  onPlayNext?: () => void;
  draggable?: boolean;
  onDragStart?: (e: React.DragEvent<HTMLDivElement>) => void;
  onDragOver?: (e: React.DragEvent<HTMLDivElement>) => void;
  onDrop?: (e: React.DragEvent<HTMLDivElement>) => void;
  onDragEnd?: (e: React.DragEvent<HTMLDivElement>) => void;
}

export const QueueItem: React.FC<QueueItemProps> = ({
  article,
  isActive,
  isPlaying,
  onPlay,
  onPause,
  onRemove,
  onPlayNext,
  draggable,
  onDragStart,
  onDragOver,
  onDrop,
  onDragEnd
}) => {
  
  // Check if buffering: active, supposed to be playing, but current segment audio is missing
  const isBuffering = isActive && isPlaying && 
    article.segments[article.currentSegmentIndex] && 
    !article.segments[article.currentSegmentIndex].audioUrl;

  const getStatusIcon = () => {
    if (isBuffering) {
        return <Loader2 className="w-5 h-5 animate-spin text-blue-500" />;
    }

    switch (article.status) {
      case PlaybackStatus.LOADING_TEXT:
        return <Loader2 className="w-5 h-5 animate-spin text-blue-500" />;
      case PlaybackStatus.LOADING_AUDIO:
        return <Loader2 className="w-5 h-5 animate-spin text-purple-500" />;
      case PlaybackStatus.ERROR:
        return <AlertCircle className="w-5 h-5 text-red-500" />;
      case PlaybackStatus.PLAYING:
        return <div className="w-4 h-4 flex items-end space-x-0.5 h-4 overflow-hidden">
            <div className="w-1 bg-blue-500 animate-[bounce_1s_infinite] h-2"></div>
            <div className="w-1 bg-blue-500 animate-[bounce_1.2s_infinite] h-4"></div>
            <div className="w-1 bg-blue-500 animate-[bounce_0.8s_infinite] h-3"></div>
        </div>;
      default:
        return <FileText className="w-5 h-5 text-slate-400 dark:text-slate-500" />;
    }
  };

  const isReady = article.status === PlaybackStatus.READY || article.status === PlaybackStatus.PAUSED || article.status === PlaybackStatus.PLAYING || article.status === PlaybackStatus.COMPLETED;

  return (
    <div
      draggable={draggable}
      onDragStart={onDragStart}
      onDragOver={onDragOver}
      onDrop={onDrop}
      onDragEnd={onDragEnd}
      className={`
      relative group flex items-center p-4 rounded-xl border transition-all duration-200
      ${isActive
        ? 'bg-blue-50 border-blue-200 dark:bg-blue-900/20 dark:border-blue-800 shadow-sm'
        : 'bg-white border-slate-100 hover:border-slate-300 dark:bg-slate-800 dark:border-slate-700 dark:hover:border-slate-600'
      }
    `}
    >
      <div className="flex-shrink-0 mr-2 w-6 flex justify-center text-slate-300 dark:text-slate-600 cursor-grab">
        <GripVertical className="w-4 h-4" />
      </div>

      <div className="flex-shrink-0 mr-4 w-8 flex justify-center">
        {getStatusIcon()}
      </div>

      <div className="flex-grow min-w-0">
        <h3 className={`font-medium truncate ${isActive ? 'text-blue-900 dark:text-blue-300' : 'text-slate-900 dark:text-slate-200'}`}>
          {article.title || article.url}
        </h3>
        <p className="text-xs text-slate-500 dark:text-slate-400 truncate mt-0.5">
          {article.url}
        </p>
        {article.errorMessage && (
          <p className="text-xs text-red-500 mt-1">{article.errorMessage}</p>
        )}
      </div>

      <div className="flex-shrink-0 ml-4 flex items-center space-x-2 opacity-100 sm:opacity-0 sm:group-hover:opacity-100 transition-opacity">
        {isReady && (
          <button
            onClick={isActive && isPlaying ? onPause : onPlay}
            className="p-2 rounded-full bg-slate-100 hover:bg-blue-100 dark:bg-slate-700 dark:hover:bg-blue-900/50 text-slate-700 dark:text-slate-200 hover:text-blue-700 dark:hover:text-blue-400 transition-colors"
          >
            {isActive && isPlaying ? <Pause className="w-4 h-4" /> : <Play className="w-4 h-4" />}
          </button>
        )}
        {onPlayNext && (
          <button
            onClick={(e) => { e.stopPropagation(); onPlayNext(); }}
            className="p-2 rounded-full bg-slate-50 hover:bg-amber-50 dark:bg-slate-700 dark:hover:bg-amber-900/40 text-amber-600 dark:text-amber-300 transition-colors"
            title="Play this article next"
          >
            <SkipForward className="w-4 h-4" />
          </button>
        )}
        <button
          onClick={(e) => {
             e.stopPropagation(); // Prevent article selection when removing
             onRemove();
          }}
          className="text-xs text-slate-400 hover:text-red-500 dark:text-slate-500 dark:hover:text-red-400 underline px-2"
        >
          Remove
        </button>
      </div>
    </div>
  );
};