import {
  MutableRefObject,
  ReactNode,
  useEffect,
  useRef,
  useState,
} from "react";
import Hls from "hls.js";
import { isDesktop, isMobile } from "react-device-detect";
import { TransformComponent, TransformWrapper } from "react-zoom-pan-pinch";
import VideoControls from "./VideoControls";

const HLS_MIME_TYPE = "application/vnd.apple.mpegurl" as const;
const unsupportedErrorCodes = [
  MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED,
  MediaError.MEDIA_ERR_DECODE,
];

type HlsVideoPlayerProps = {
  className: string;
  children?: ReactNode;
  videoRef: MutableRefObject<HTMLVideoElement | null>;
  visible: boolean;
  currentSource: string;
  hotKeys: boolean;
  onClipEnded?: () => void;
  onPlayerLoaded?: () => void;
  onTimeUpdate?: (time: number) => void;
  onPlaying?: () => void;
};
export default function HlsVideoPlayer({
  className,
  children,
  videoRef,
  visible,
  currentSource,
  hotKeys,
  onClipEnded,
  onPlayerLoaded,
  onTimeUpdate,
  onPlaying,
}: HlsVideoPlayerProps) {
  // playback

  const hlsRef = useRef<Hls>();
  const [useHlsCompat, setUseHlsCompat] = useState(false);
  const [loadedMetadata, setLoadedMetadata] = useState(false);

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

    if (videoRef.current.canPlayType(HLS_MIME_TYPE)) {
      return;
    } else if (Hls.isSupported()) {
      setUseHlsCompat(true);
    }
  }, [videoRef]);

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

    const currentPlaybackRate = videoRef.current.playbackRate;

    if (!useHlsCompat) {
      videoRef.current.src = currentSource;
      videoRef.current.load();
      return;
    }

    if (!hlsRef.current) {
      hlsRef.current = new Hls();
      hlsRef.current.attachMedia(videoRef.current);
    }

    hlsRef.current.loadSource(currentSource);
    videoRef.current.playbackRate = currentPlaybackRate;
  }, [videoRef, hlsRef, useHlsCompat, currentSource]);

  // controls

  const [isPlaying, setIsPlaying] = useState(true);
  const [mobileCtrlTimeout, setMobileCtrlTimeout] = useState<NodeJS.Timeout>();
  const [controls, setControls] = useState(isMobile);
  const [controlsOpen, setControlsOpen] = useState(false);

  return (
    <TransformWrapper minScale={1.0}>
      <div
        className={`relative w-full ${className ?? ""} ${visible ? "visible" : "hidden"}`}
        onMouseOver={
          isDesktop
            ? () => {
                setControls(true);
              }
            : undefined
        }
        onMouseOut={
          isDesktop
            ? () => {
                setControls(controlsOpen);
              }
            : undefined
        }
        onClick={isDesktop ? undefined : () => setControls(!controls)}
      >
        <TransformComponent
          wrapperStyle={{
            width: "100%",
          }}
          contentStyle={{
            width: "100%",
          }}
        >
          <video
            ref={videoRef}
            className={`size-full bg-black rounded-2xl ${loadedMetadata ? "" : "invisible"}`}
            preload="auto"
            autoPlay
            controls={false}
            playsInline
            muted
            onPlay={() => {
              setIsPlaying(true);

              if (isMobile) {
                setControls(true);
                setMobileCtrlTimeout(
                  setTimeout(() => setControls(false), 4000),
                );
              }
            }}
            onPlaying={onPlaying}
            onPause={() => {
              setIsPlaying(false);

              if (isMobile && mobileCtrlTimeout) {
                clearTimeout(mobileCtrlTimeout);
              }
            }}
            onTimeUpdate={() =>
              onTimeUpdate && videoRef.current
                ? onTimeUpdate(videoRef.current.currentTime)
                : undefined
            }
            onLoadedData={onPlayerLoaded}
            onLoadedMetadata={() => setLoadedMetadata(true)}
            onEnded={onClipEnded}
            onError={(e) => {
              if (
                !hlsRef.current &&
                // @ts-expect-error code does exist
                unsupportedErrorCodes.includes(e.target.error.code) &&
                videoRef.current
              ) {
                setLoadedMetadata(false);
                setUseHlsCompat(true);
              }
            }}
          />
        </TransformComponent>
        <VideoControls
          className="absolute bottom-5 left-1/2 -translate-x-1/2"
          video={videoRef.current}
          isPlaying={isPlaying}
          show={controls}
          controlsOpen={controlsOpen}
          setControlsOpen={setControlsOpen}
          playbackRate={videoRef.current?.playbackRate ?? 1}
          hotKeys={hotKeys}
          onPlayPause={(play) => {
            if (!videoRef.current) {
              return;
            }

            if (play) {
              videoRef.current.play();
            } else {
              videoRef.current.pause();
            }
          }}
          onSeek={(diff) => {
            const currentTime = videoRef.current?.currentTime;

            if (!videoRef.current || !currentTime) {
              return;
            }

            videoRef.current.currentTime = Math.max(0, currentTime + diff);
          }}
          onSetPlaybackRate={(rate) =>
            videoRef.current ? (videoRef.current.playbackRate = rate) : null
          }
        />
        {children}
      </div>
    </TransformWrapper>
  );
}