"use client";

import { useRef, useState, useEffect } from "react";
import { Play, Pause, Volume2, VolumeX, Maximize, AlertCircle } from "lucide-react";

interface ReelPlayerProps {
  src: string;
  className?: string;
}

export function ReelPlayer({ src, className = "" }: ReelPlayerProps) {
  const videoRef = useRef<HTMLVideoElement>(null);
  const progressBarRef = useRef<HTMLDivElement>(null);
  const [isPlaying, setIsPlaying] = useState(false);
  const [isMuted, setIsMuted] = useState(false);
  const [currentTime, setCurrentTime] = useState(0);
  const [duration, setDuration] = useState(0);
  const [volume, setVolume] = useState(1);
  const [isLoading, setIsLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    const video = videoRef.current;
    if (!video) return;

    const handleLoadedMetadata = () => {
      setDuration(video.duration);
    };

    const handleTimeUpdate = () => {
      setCurrentTime(video.currentTime);
    };

    const handleEnded = () => {
      setIsPlaying(false);
    };

    const handleError = (e: Event) => {
      setIsLoading(false);
      const videoEl = e.target as HTMLVideoElement;
      const errorCode = videoEl.error?.code;
      const errorMessage = videoEl.error?.message;

      let userMessage = "Failed to load video. ";
      switch (errorCode) {
        case 1:
          userMessage += "Video loading was aborted.";
          break;
        case 2:
          userMessage += "Network error occurred.";
          break;
        case 3:
          userMessage += "Video format not supported by your browser.";
          break;
        case 4:
          userMessage += "Video source not found.";
          break;
        default:
          userMessage += errorMessage || "Unknown error.";
      }

      setError(userMessage);
      console.error("Video error:", errorCode, errorMessage);
    };

    const handleCanPlay = () => {
      console.log("Video canplay event fired");
      setIsLoading(false);
      setError(null);
    };

    const handleLoadedData = () => {
      console.log("Video loadeddata event fired");
      setIsLoading(false);
    };

    video.addEventListener("loadedmetadata", handleLoadedMetadata);
    video.addEventListener("timeupdate", handleTimeUpdate);
    video.addEventListener("ended", handleEnded);
    video.addEventListener("error", handleError);
    video.addEventListener("canplay", handleCanPlay);
    video.addEventListener("loadeddata", handleLoadedData);

    // Check if video is already loaded (in case events fired before listeners attached)
    if (video.readyState >= 3) {
      // HAVE_FUTURE_DATA or HAVE_ENOUGH_DATA
      console.log("Video already loaded, readyState:", video.readyState);
      setIsLoading(false);
      if (video.duration) {
        setDuration(video.duration);
      }
    }

    return () => {
      video.removeEventListener("loadedmetadata", handleLoadedMetadata);
      video.removeEventListener("timeupdate", handleTimeUpdate);
      video.removeEventListener("ended", handleEnded);
      video.removeEventListener("error", handleError);
      video.removeEventListener("canplay", handleCanPlay);
      video.removeEventListener("loadeddata", handleLoadedData);
    };
  }, []);

  const togglePlay = async () => {
    const video = videoRef.current;
    if (!video || error) return;

    try {
      if (isPlaying) {
        video.pause();
        setIsPlaying(false);
      } else {
        await video.play();
        setIsPlaying(true);
      }
    } catch (err) {
      console.error("Play error:", err);
      setError("Unable to play video. " + (err as Error).message);
      setIsPlaying(false);
    }
  };

  const toggleMute = () => {
    const video = videoRef.current;
    if (!video) return;

    video.muted = !isMuted;
    setIsMuted(!isMuted);
  };

  const handleProgressClick = (e: React.MouseEvent<HTMLDivElement>) => {
    const video = videoRef.current;
    const progressBar = progressBarRef.current;
    if (!video || !progressBar) return;

    const rect = progressBar.getBoundingClientRect();
    const clickX = e.clientX - rect.left;
    const percentage = clickX / rect.width;
    video.currentTime = percentage * video.duration;
  };

  const toggleFullscreen = () => {
    const video = videoRef.current;
    if (!video) return;

    if (!document.fullscreenElement) {
      video.requestFullscreen();
    } else {
      document.exitFullscreen();
    }
  };

  const formatTime = (seconds: number) => {
    const mins = Math.floor(seconds / 60);
    const secs = Math.floor(seconds % 60);
    return `${mins}:${secs.toString().padStart(2, "0")}`;
  };

  const progress = duration > 0 ? (currentTime / duration) * 100 : 0;

  return (
    <div className={`relative bg-black border border-white/10 ${className}`}>
      {/* Video Element */}
      <video
        ref={videoRef}
        className="w-full aspect-video bg-black"
        onClick={togglePlay}
        preload="auto"
        playsInline
      >
        <source src={src} type="video/mp4" />
        Your browser does not support the video tag.
      </video>

      {/* Loading State */}
      {isLoading && !error && (
        <div className="absolute inset-0 flex items-center justify-center bg-black/50">
          <div className="text-white text-sm">Loading video...</div>
        </div>
      )}

      {/* Error State */}
      {error && (
        <div className="absolute inset-0 flex flex-col items-center justify-center bg-black/80 p-4">
          <AlertCircle className="w-12 h-12 text-[#ff4d00] mb-3" />
          <div className="text-white text-sm text-center max-w-md">
            {error}
          </div>
          <div className="text-gray-400 text-xs mt-2">
            Try refreshing the page or using a different browser.
          </div>
        </div>
      )}

      {/* Custom Controls */}
      {!error && (
        <div className="absolute bottom-0 left-0 right-0 bg-gradient-to-t from-black/90 via-black/70 to-transparent p-4">
        {/* Progress Bar */}
        <div
          ref={progressBarRef}
          className="w-full h-1 bg-white/20 cursor-pointer mb-3 relative"
          onClick={handleProgressClick}
        >
          <div
            className="h-full bg-[#ff4d00] transition-all duration-100"
            style={{ width: `${progress}%` }}
          />
        </div>

        {/* Controls Row */}
        <div className="flex items-center justify-between gap-4">
          <div className="flex items-center gap-3">
            {/* Play/Pause Button */}
            <button
              onClick={togglePlay}
              className="text-white hover:text-[#ff4d00] transition-colors"
              aria-label={isPlaying ? "Pause" : "Play"}
            >
              {isPlaying ? (
                <Pause className="w-5 h-5" />
              ) : (
                <Play className="w-5 h-5" />
              )}
            </button>

            {/* Volume Button */}
            <button
              onClick={toggleMute}
              className="text-white hover:text-[#ff4d00] transition-colors"
              aria-label={isMuted ? "Unmute" : "Mute"}
            >
              {isMuted ? (
                <VolumeX className="w-5 h-5" />
              ) : (
                <Volume2 className="w-5 h-5" />
              )}
            </button>

            {/* Time Display */}
            <span className="text-white text-sm font-mono">
              {formatTime(currentTime)} / {formatTime(duration)}
            </span>
          </div>

          {/* Fullscreen Button */}
          <button
            onClick={toggleFullscreen}
            className="text-white hover:text-[#ff4d00] transition-colors"
            aria-label="Fullscreen"
          >
            <Maximize className="w-5 h-5" />
          </button>
        </div>
        </div>
      )}
    </div>
  );
}