"use client";

import React, { useState, useRef, useEffect } from 'react';
import { Play, Pause, Volume2, VolumeX, SkipBack, SkipForward, Maximize, Settings, Music, Video, FileText, Search } from 'lucide-react';
import Footer from '../footer';
import {
  ResizableHandle,
  ResizablePanel,
  ResizablePanelGroup,
} from "@/components/ui/resizable";

// Media type detection
const getMediaType = (url) => {
  const extension = url.split('.').pop()?.toLowerCase();
  if (['mp4', 'webm', 'ogg', 'mov', 'avi'].includes(extension || '')) return 'video';
  if (['mp3', 'wav', 'flac', 'aac', 'm4a'].includes(extension || '')) return 'audio';
  if (['pdf', 'ppt', 'pptx'].includes(extension || '')) return 'slides';
  return 'video'; // default
};
import './style.css'; // Ensure you have a styles.css file for custom styles

// Waveform Component (Winamp inspired)
const WaveformVisualizer = ({ isPlaying, currentTime = 0 }) => {
  const canvasRef = useRef(null);

  useEffect(() => {
    const canvas = canvasRef.current;
    if (!canvas) return;

    const ctx = canvas.getContext('2d');
    const width = canvas.width;
    const height = canvas.height;

    // Generate mock waveform data
    const bars = 100;
    const barWidth = width / bars;

    const animate = () => {
      ctx.clearRect(0, 0, width, height);

      for (let i = 0; i < bars; i++) {
        const barHeight = isPlaying
          ? Math.random() * height * 0.7 + height * 0.1
          : height * 0.2;

        const x = i * barWidth;
        const progress = currentTime * bars;

        // Gradient effect
        const gradient = ctx.createLinearGradient(0, 0, 0, height);
        if (i < progress) {
          gradient.addColorStop(0, 'hsl(207, 90%, 54%)'); // accent color
          gradient.addColorStop(1, 'hsl(207, 90%, 64%)');
        } else {
          gradient.addColorStop(0, 'hsl(0, 0%, 85%)'); // muted color
          gradient.addColorStop(1, 'hsl(0, 0%, 75%)');
        }

        ctx.fillStyle = gradient;
        ctx.fillRect(x, height - barHeight, barWidth - 1, barHeight);
      }

      if (isPlaying) {
        requestAnimationFrame(animate);
      }
    };

    animate();
  }, [isPlaying, currentTime]);

  return (
    <div className="bg-card border border-border rounded-lg p-4">
      <canvas
        ref={canvasRef}
        width={800}
        height={120}
        className="w-full h-20 rounded"
      />
    </div>
  );
};

// Media Player Component
const MediaPlayer = ({ media }) => {
  const [isPlaying, setIsPlaying] = useState(false);
  const [volume, setVolume] = useState(0.7);
  const [currentTime, setCurrentTime] = useState(0);
  const [duration, setDuration] = useState(0);
  const [isMuted, setIsMuted] = useState(false);
  const [playbackSpeed, setPlaybackSpeed] = useState(1);

  const videoRef = useRef(null);
  const playerContainerRef = useRef(null);

  const mediaType = getMediaType(media.url);

  const formatTime = (time) => {
    const minutes = Math.floor(time / 60);
    const seconds = Math.floor(time % 60);
    return `${minutes}:${seconds.toString().padStart(2, '0')}`;
  };

  const handlePlayPause = () => {
    if (videoRef.current) {
      if (isPlaying) {
        videoRef.current.pause();
      } else {
        videoRef.current.play();
      }
      setIsPlaying(!isPlaying);
    }
  };

  const handleVolumeChange = (e) => {
    const newVolume = parseFloat(e.target.value);
    setVolume(newVolume);
    if (videoRef.current) {
      videoRef.current.volume = newVolume;
    }
  };

  const handleProgressChange = (e) => {
    const newTime = (parseFloat(e.target.value) / 100) * duration;
    setCurrentTime(newTime);
    if (videoRef.current) {
      videoRef.current.currentTime = newTime;
    }
  };

  const toggleMute = () => {
    setIsMuted(!isMuted);
    if (videoRef.current) {
      videoRef.current.muted = !isMuted;
    }
  };

  const toggleFullscreen = () => {
    if (!document.fullscreenElement) {
      playerContainerRef.current?.requestFullscreen();
    } else {
      document.exitFullscreen();
    }
  };

  const skipTime = (seconds) => {
    if (videoRef.current) {
      videoRef.current.currentTime += seconds;
    }
  };

  return (
    <div ref={playerContainerRef} className="bg-card border border-border rounded-lg overflow-hidden shadow-lg">
      {/* Media Display Area */}
      <div className="relative bg-black aspect-video">
        {mediaType === 'video' && (
            <video
            ref={videoRef}
            className="w-full h-full object-contain"
            onTimeUpdate={(e) => setCurrentTime((e.target as HTMLVideoElement).currentTime)}
            onLoadedMetadata={(e) => setDuration((e.target as HTMLVideoElement).duration)}
            onPlay={() => setIsPlaying(true)}
            onPause={() => setIsPlaying(false)}
            >
            <source src={media.url} type="video/mp4" />
            </video>
        )}

        {mediaType === 'audio' && (
          <div className="flex items-center justify-center h-full bg-gradient-to-br from-primary/10 to-accent/10">
            <div className="text-center">
              <Music className="w-24 h-24 text-muted-foreground mx-auto mb-4" />
              <h3 className="text-xl font-semibold text-foreground">{media.title}</h3>
              <p className="text-muted-foreground">{media.artist || 'Unknown Artist'}</p>
            </div>
            <audio
              ref={videoRef}
              onTimeUpdate={(e) => setCurrentTime((e.target as HTMLAudioElement).currentTime)}
              onLoadedMetadata={(e) => setDuration((e.target as HTMLAudioElement).duration)}
              onPlay={() => setIsPlaying(true)}
              onPause={() => setIsPlaying(false)}
            >
              <source src={media.url} type="audio/mp3" />
            </audio>
          </div>
        )}

        {mediaType === 'slides' && (
          <div className="flex items-center justify-center h-full bg-gradient-to-br from-secondary/50 to-muted/30">
            <div className="text-center">
              <FileText className="w-24 h-24 text-muted-foreground mx-auto mb-4" />
              <h3 className="text-xl font-semibold text-foreground">{media.title}</h3>
              <p className="text-muted-foreground">Presentation Slides</p>
            </div>
          </div>
        )}

        {/* Overlay Controls */}
        <div className="absolute inset-0 bg-black/20 opacity-0 hover:opacity-100 transition-opacity flex items-center justify-center">
          <button
            onClick={handlePlayPause}
            className="bg-primary hover:bg-primary/90 text-primary-foreground rounded-full p-4 transition-all hover:scale-110"
          >
            {isPlaying ? <Pause className="w-8 h-8" /> : <Play className="w-8 h-8 ml-1" />}
          </button>
        </div>
      </div>

      {/* Waveform for Audio */}
      {mediaType === 'audio' && (
        <div className="p-4">
          <WaveformVisualizer isPlaying={isPlaying} currentTime={currentTime / duration} />
        </div>
      )}

      {/* Controls */}
      <div className="p-4 bg-card border-t border-border">
        {/* Progress Bar */}
        <div className="mb-4">
          <input
            type="range"
            min="0"
            max="100"
            value={(currentTime / duration) * 100 || 0}
            onChange={handleProgressChange}
            className="w-full h-2 bg-muted rounded-lg appearance-none cursor-pointer slider"
          />
          <div className="flex justify-between text-xs text-muted-foreground mt-1">
            <span>{formatTime(currentTime)}</span>
            <span>{formatTime(duration)}</span>
          </div>
        </div>

        {/* Control Buttons */}
        <div className="flex items-center justify-between">
          <div className="flex items-center space-x-3">
            <button
              onClick={() => skipTime(-10)}
              className="p-2 hover:bg-secondary rounded-lg transition-colors"
            >
              <SkipBack className="w-5 h-5" />
            </button>

            <button
              onClick={handlePlayPause}
              className="bg-primary hover:bg-primary/90 text-primary-foreground rounded-lg p-3 transition-all hover:scale-105"
            >
              {isPlaying ? <Pause className="w-5 h-5" /> : <Play className="w-5 h-5" />}
            </button>

            <button
              onClick={() => skipTime(10)}
              className="p-2 hover:bg-secondary rounded-lg transition-colors"
            >
              <SkipForward className="w-5 h-5" />
            </button>

            <div className="flex items-center space-x-2 ml-4">
              <button
                onClick={toggleMute}
                className="p-2 hover:bg-secondary rounded-lg transition-colors"
              >
                {isMuted || volume === 0 ? <VolumeX className="w-5 h-5" /> : <Volume2 className="w-5 h-5" />}
              </button>
              <input
                type="range"
                min="0"
                max="1"
                step="0.1"
                value={isMuted ? 0 : volume}
                onChange={handleVolumeChange}
                className="w-20 h-2 bg-muted rounded-lg appearance-none cursor-pointer slider"
              />
            </div>
          </div>

          <div className="flex items-center space-x-2">
            <select
              value={playbackSpeed}
              onChange={(e) => setPlaybackSpeed(parseFloat(e.target.value))}
              className="bg-secondary text-secondary-foreground px-2 py-1 rounded text-sm border border-border"
            >
              <option value={0.5}>0.5x</option>
              <option value={0.75}>0.75x</option>
              <option value={1}>Normal</option>
              <option value={1.25}>1.25x</option>
              <option value={1.5}>1.5x</option>
              <option value={2}>2x</option>
            </select>

            <button
              onClick={toggleFullscreen}
              className="p-2 hover:bg-secondary rounded-lg transition-colors"
            >
              <Maximize className="w-5 h-5" />
            </button>

            <button className="p-2 hover:bg-secondary rounded-lg transition-colors">
              <Settings className="w-5 h-5" />
            </button>
          </div>
        </div>
      </div>
    </div>
  );
};

// Media Library Component
const MediaLibrary = ({ mediaList, onSelectMedia, selectedMedia }) => {
  const [searchQuery, setSearchQuery] = useState('');

  const filteredMedia = mediaList.filter(media =>
    media.title.toLowerCase().includes(searchQuery.toLowerCase()) ||
    (media.artist && media.artist.toLowerCase().includes(searchQuery.toLowerCase()))
  );

  const getMediaIcon = (url) => {
    const type = getMediaType(url);
    switch (type) {
      case 'video': return <Video className="w-5 h-5" />;
      case 'audio': return <Music className="w-5 h-5" />;
      case 'slides': return <FileText className="w-5 h-5" />;
      default: return <Video className="w-5 h-5" />;
    }
  };

  return (
    <div className="bg-card border border-border rounded-lg p-4 h-full">
      {/* Header */}
      <div className="flex items-center justify-between mb-4">
        <h2 className="text-lg font-semibold text-foreground">Media Library</h2>
        <div className="flex items-center space-x-2">
          <div className="relative">
            <Search className="w-4 h-4 absolute left-2 top-1/2 transform -translate-y-1/2 text-muted-foreground" />
            <input
              type="text"
              placeholder="Search..."
              value={searchQuery}
              onChange={(e) => setSearchQuery(e.target.value)}
              className="pl-8 pr-2 py-1 bg-input border border-border rounded text-sm focus:outline-none focus:ring-2 focus:ring-ring w-full"
            />
          </div>
        </div>
      </div>

      {/* Media List */}
      <div className="space-y-2 overflow-y-auto max-h-[calc(100vh-200px)]">
        {filteredMedia.map((media, index) => (
          <div
            key={index}
            onClick={() => onSelectMedia(media)}
            className={`cursor-pointer transition-all hover:bg-muted rounded p-2 flex items-center space-x-2 ${
              selectedMedia?.url === media.url ? 'bg-primary/10 border-l-2 border-primary' : ''
            }`}
          >
            <div className="text-accent">
              {getMediaIcon(media.url)}
            </div>
            <div className="flex-1 min-w-0">
              <h3 className="text-sm font-medium text-foreground truncate">{media.title}</h3>
              {media.artist && (
                <p className="text-xs text-muted-foreground truncate">{media.artist}</p>
              )}
            </div>
          </div>
        ))}
      </div>
    </div>
  );
};

// Main App Component
const CorporateMediaPlayer = () => {
  const [selectedMedia, setSelectedMedia] = useState(null);

  // Sample media library
  const mediaLibrary = [
    {
      title: "Corporate Overview Video",
      url: "https://sample-videos.com/zip/10/mp4/SampleVideo_1280x720_1mb.mp4",
      type: "video"
    },
    {
      title: "Quarterly Results Presentation",
      url: "https://example.com/presentation.pdf",
      type: "slides"
    },
    {
      title: "Background Music",
      artist: "Corporate Audio",
      url: "https://www2.cs.uic.edu/~i101/SoundFiles/BabyElephantWalk60.wav",
      type: "audio"
    },
    {
      title: "Product Demo",
      url: "https://sample-videos.com/zip/10/mp4/SampleVideo_640x360_1mb.mp4",
      type: "video"
    },
    {
      title: "Conference Call Audio",
      artist: "Meeting Recording",
      url: "https://www2.cs.uic.edu/~i101/SoundFiles/StarWars60.wav",
      type: "audio"
    }
  ];

  useEffect(() => {
    // Auto-select first media item
    if (mediaLibrary.length > 0 && !selectedMedia) {
      setSelectedMedia(mediaLibrary[0]);
    }
  }, []);

  const shortcuts = [
    // Media control row
    [
      { key: 'Space', label: 'Play/Pause', action: () => console.log('Play/Pause') },
      { key: '←', label: 'Skip Back', action: () => console.log('Skip Back') },
      { key: '→', label: 'Skip Forward', action: () => console.log('Skip Forward') },
      { key: '↑', label: 'Volume Up', action: () => console.log('Volume Up') },
      { key: '↓', label: 'Volume Down', action: () => console.log('Volume Down') },
    ],
    // Navigation row
    [
      { key: 'F', label: 'Fullscreen', action: () => console.log('Fullscreen') },
      { key: 'M', label: 'Mute', action: () => console.log('Mute') },
      { key: 'L', label: 'Playlist', action: () => console.log('Playlist') },
      { key: 'S', label: 'Settings', action: () => console.log('Settings') },
      { key: 'H', label: 'Help', action: () => console.log('Help') },
    ]
  ];

  return (
    <div className="min-h-screen bg-background p-4 flex flex-col">
      <div className="text-center mb-6">
        <h1 className="text-3xl font-bold text-foreground mb-2">How to use LLMs</h1>
        <p className="text-muted-foreground">The guide to LLMs in tutorials</p>
      </div>

      <ResizablePanelGroup direction="horizontal" className="flex-grow">
        <ResizablePanel defaultSize={70}>
          <div className="flex-grow max-w-full mx-auto">
            {/* Media Player */}
            {selectedMedia && (
              <div className="mb-6">
                <MediaPlayer media={selectedMedia} />
              </div>
            )}
          </div>
        </ResizablePanel>
        <ResizableHandle withHandle />
        <ResizablePanel defaultSize={30}>
          <div className="ml-4 h-full">
            {/* Media Library */}
            <MediaLibrary
              mediaList={mediaLibrary}
              onSelectMedia={setSelectedMedia}
              selectedMedia={selectedMedia}
            />
          </div>
        </ResizablePanel>
      </ResizablePanelGroup>

      {/* Footer */}
      <Footer shortcuts={shortcuts} />

    </div>
  );
};

export default CorporateMediaPlayer;