import { h } from 'preact';
import { useRef, useEffect } from 'preact/hooks';
import videojs from 'video.js';
import 'videojs-playlist';
import 'videojs-seek-buttons';
import 'video.js/dist/video-js.css';
import 'videojs-seek-buttons/dist/videojs-seek-buttons.css';

const defaultOptions = {
  controls: true,
  playbackRates: [0.5, 1, 2, 4, 8],
  fluid: true,
};
const defaultSeekOptions = {
  forward: 30,
  back: 10,
};

export default function VideoPlayer({ children, options, seekOptions = {}, onReady = () => {}, onDispose = () => {} }) {
  const playerRef = useRef();
  
  if (!videojs.browser.IS_FIREFOX) {
    defaultOptions.playbackRates.push(16);
  }
  
  useEffect(() => {
    const player = videojs(playerRef.current, { ...defaultOptions, ...options }, () => {
      onReady(player);
    });
    player.seekButtons({
      ...defaultSeekOptions,
      ...seekOptions,
    });

    // Disable fullscreen on iOS if we have children
    if (
      children &&
      videojs.browser.IS_IOS &&
      videojs.browser.IOS_VERSION > 9 &&
      !player.el_.ownerDocument.querySelector('.bc-iframe')
    ) {
      player.tech_.el_.setAttribute('playsinline', 'playsinline');
      player.tech_.supportsFullScreen = function () {
        return false;
      };
    }

    const screen = window.screen;

    const angle = () => {
      // iOS
      if (typeof window.orientation === 'number') {
        return window.orientation;
      }
      // Android
      if (screen && screen.orientation && screen.orientation.angle) {
        return window.orientation;
      }
      videojs.log('angle unknown');
      return 0;
    };

    const rotationHandler = () => {
      const currentAngle = angle();

      if (currentAngle === 90 || currentAngle === 270 || currentAngle === -90) {
        if (player.paused() === false) {
          player.requestFullscreen();
        }
      }

      if ((currentAngle === 0 || currentAngle === 180) && player.isFullscreen()) {
        player.exitFullscreen();
      }
    };

    if (videojs.browser.IS_IOS) {
      window.addEventListener('orientationchange', rotationHandler);
    } else if (videojs.browser.IS_ANDROID && screen.orientation) {
      // addEventListener('orientationchange') is not a user interaction on Android
      screen.orientation.onchange = rotationHandler;
    }

    return () => {
      if (videojs.browser.IS_IOS) {
        window.removeEventListener('orientationchange', rotationHandler);
      }
      player.dispose();
      onDispose();
    };
  }, []); // eslint-disable-line react-hooks/exhaustive-deps

  return (
    <div data-vjs-player>
      <video ref={playerRef} className="small-player video-js vjs-default-skin" controls playsinline />
      {children}
    </div>
  );
}