import React, { ReactNode, useCallback, useEffect, useState } from 'react';
import { Badge, Box, Button, Chip, Modal, Overlay, OverlayBackdrop, OverlayCenter, Spinner, Text, Tooltip, TooltipProvider, as } from 'folds';
import { Icon, Icons } from '../../icons';
import classNames from 'classnames';
import { Blurhash } from 'react-blurhash';
import FocusTrap from 'focus-trap-react';
import { EncryptedAttachmentInfo } from 'browser-encrypt-attachment';
import {
  IThumbnailContent,
  IVideoInfo,
  MATRIX_BLUR_HASH_PROPERTY_NAME,
} from '../../../../types/matrix/common';
import * as css from './style.css';
import { useMatrixClient } from '../../../hooks/useMatrixClient';
import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
import { bytesToSize, millisecondsToMinutesAndSeconds } from '../../../utils/common';
import {
  decryptFile,
  downloadEncryptedMedia,
  downloadMedia,
  mxcUrlToHttp,
} from '../../../utils/matrix';
import { getCurrentAccessToken } from '../../../utils/auth';
import { useMediaAuthentication } from '../../../hooks/useMediaAuthentication';
import { validBlurHash } from '../../../utils/blurHash';
import { ModalWide } from '../../../styles/Modal.css';
import { stopPropagation } from '../../../utils/keyboard';
import { setMediaDimensions, getMediaBlurHash, getMediaDimensions, rememberMediaBlurHash } from '../../../state/mediaDimensionCache';

type RenderViewerProps = {
  src: string;
  alt: string;
  requestClose: () => void;
};
type RenderVideoProps = {
  title: string;
  src: string;
  onLoadedMetadata: (event?: React.SyntheticEvent<HTMLVideoElement>) => void;
  onError: () => void;
  autoPlay: boolean;
  controls: boolean;
  onExpand?: () => void;
};
type VideoContentProps = {
  body: string;
  mimeType: string;
  url: string;
  info: IVideoInfo & IThumbnailContent;
  encInfo?: EncryptedAttachmentInfo;
  autoPlay?: boolean;
  markedAsSpoiler?: boolean;
  spoilerReason?: string;
  renderThumbnail?: () => ReactNode;
  renderViewer?: (props: RenderViewerProps) => ReactNode;
  renderVideo: (props: RenderVideoProps) => ReactNode;
};
export const VideoContent = as<'div', VideoContentProps>(
  (
    {
      className,
      body,
      mimeType,
      url,
      info,
      encInfo,
      autoPlay,
      markedAsSpoiler,
      spoilerReason,
      renderThumbnail,
      renderViewer,
      renderVideo,
      ...props
    },
    ref
  ) => {
    const mx = useMatrixClient();
    const useAuthentication = useMediaAuthentication();
    const eventBlurHash = validBlurHash(info.thumbnail_info?.[MATRIX_BLUR_HASH_PROPERTY_NAME]);
    const cachedBlurHash = getMediaBlurHash(url);
    const blurHash = eventBlurHash ?? cachedBlurHash;
    const cachedDims = getMediaDimensions(url);
    const blurResolutionX = 32;
    const blurW = info.w ?? info.thumbnail_info?.w ?? cachedDims?.w;
    const blurH = info.h ?? info.thumbnail_info?.h ?? cachedDims?.h;
    const blurResolutionY =
      blurW && blurH && blurW > 0
        ? Math.max(1, Math.round(blurResolutionX * (blurH / blurW)))
        : 32;

    const [load, setLoad] = useState(false);
    const [error, setError] = useState(false);
    const [viewer, setViewer] = useState(false);
    const [blurred, setBlurred] = useState(markedAsSpoiler ?? false);
    const [showPlaceholder, setShowPlaceholder] = useState(true);

    const [srcState, loadSrc] = useAsyncCallback(
      useCallback(async () => {
        const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication) ?? url;
        // Always use current session's token to avoid stale tokens during account switches
        const accessToken = getCurrentAccessToken();
        const fileContent = encInfo
          ? await downloadEncryptedMedia(mediaUrl, (encBuf) =>
              decryptFile(encBuf, mimeType, encInfo), accessToken
            )
          : await downloadMedia(mediaUrl, accessToken);
        return URL.createObjectURL(fileContent);
      }, [mx, url, useAuthentication, mimeType, encInfo])
    );

    const handleLoad = (video?: HTMLVideoElement) => {
      if (video?.videoWidth && video?.videoHeight) {
        setMediaDimensions(url, video.videoWidth, video.videoHeight);
      }
      if (video) rememberMediaBlurHash(url, video);
      setLoad(true);
    };
    const handleError = () => {
      setLoad(false);
      setError(true);
      setShowPlaceholder(true);
    };

    const handleRetry = () => {
      setError(false);
      loadSrc();
    };

    useEffect(() => {
      if (autoPlay) loadSrc();
    }, [autoPlay, loadSrc]);

    useEffect(() => {
      if (!load) {
        setShowPlaceholder(true);
        return undefined;
      }
      const timer = window.setTimeout(() => setShowPlaceholder(false), 540);
      return () => window.clearTimeout(timer);
    }, [load]);

    return (
      <Box className={classNames(css.RelativeBase, className)} {...props} ref={ref}>
        {showPlaceholder &&
          (typeof blurHash === 'string' ? (
            <div className={css.BlurhashPlaceholder}>
              <Blurhash
                hash={blurHash}
                width="100%"
                height="100%"
                resolutionX={blurResolutionX}
                resolutionY={blurResolutionY}
                punch={1.2}
                style={{ display: 'block' }}
              />
            </div>
          ) : (
            <div className={css.MediaSkeleton} />
          ))}
        {renderViewer && srcState.status === AsyncStatus.Success && (
          <Overlay open={viewer} backdrop={<OverlayBackdrop />}>
            <OverlayCenter>
              <FocusTrap
                focusTrapOptions={{
                  initialFocus: false,
                  onDeactivate: () => setViewer(false),
                  clickOutsideDeactivates: true,
                  escapeDeactivates: stopPropagation,
                }}
              >
                <Modal className={ModalWide} size="500">
                  {renderViewer({
                    src: srcState.data,
                    alt: body,
                    requestClose: () => setViewer(false),
                  })}
                </Modal>
              </FocusTrap>
            </OverlayCenter>
          </Overlay>
        )}
        {renderThumbnail && !load && (
          <Box
            className={classNames(css.AbsoluteContainer, blurred && css.Blur)}
            alignItems="Center"
            justifyContent="Center"
          >
            {renderThumbnail()}
          </Box>
        )}
        {!autoPlay && !blurred && srcState.status === AsyncStatus.Idle && (
          <Box className={css.AbsoluteContainer} alignItems="Center" justifyContent="Center">
            <Button
              variant="Secondary"
              fill="Solid"
              radii="300"
              size="300"
              onClick={loadSrc}
              before={<Icon size="Inherit" src={Icons.Play} filled />}
            >
              <Text size="B300">Watch</Text>
            </Button>
          </Box>
        )}
        {srcState.status === AsyncStatus.Success && (
          <Box
            className={classNames(
              css.AbsoluteContainer,
              css.MediaFadeIn,
              load && css.MediaFadeInLoaded,
              blurred && css.Blur
            )}
          >
            {renderVideo({
              title: body,
              src: srcState.data,
              onLoadedMetadata: (e?: React.SyntheticEvent<HTMLVideoElement>) => {
                handleLoad(e?.currentTarget);
              },
              onError: handleError,
              autoPlay: true,
              controls: true,
              onExpand: renderViewer ? () => setViewer(true) : undefined,
            })}
          </Box>
        )}
        {blurred && !error && srcState.status !== AsyncStatus.Error && (
          <Box className={css.AbsoluteContainer} alignItems="Center" justifyContent="Center">
            <TooltipProvider
              tooltip={
                typeof spoilerReason === 'string' && (
                  <Tooltip variant="Secondary">
                    <Text>{spoilerReason}</Text>
                  </Tooltip>
                )
              }
              position="Top"
              align="Center"
            >
              {(triggerRef) => (
                <Chip
                  ref={triggerRef}
                  variant="Secondary"
                  radii="Pill"
                  size="500"
                  outlined
                  onClick={() => {
                    setBlurred(false);
                  }}
                >
                  <Text size="B300">Spoiler</Text>
                </Chip>
              )}
            </TooltipProvider>
          </Box>
        )}
        {(srcState.status === AsyncStatus.Loading || srcState.status === AsyncStatus.Success) &&
          !load &&
          !blurred &&
          typeof blurHash !== 'string' && (
            <Box className={css.AbsoluteContainer} alignItems="Center" justifyContent="Center">
              <Spinner variant="Secondary" />
            </Box>
          )}
        {(error || srcState.status === AsyncStatus.Error) && (
          <Box className={css.AbsoluteContainer} alignItems="Center" justifyContent="Center">
            <TooltipProvider
              tooltip={
                <Tooltip variant="Critical">
                  <Text>Failed to load video!</Text>
                </Tooltip>
              }
              position="Top"
              align="Center"
            >
              {(triggerRef) => (
                <Button
                  ref={triggerRef}
                  size="300"
                  variant="Critical"
                  fill="Soft"
                  outlined
                  radii="300"
                  onClick={handleRetry}
                  before={<Icon size="Inherit" src={Icons.Warning} filled />}
                >
                  <Text size="B300">Retry</Text>
                </Button>
              )}
            </TooltipProvider>
          </Box>
        )}
        {!load && typeof info.size === 'number' && (
          <Box
            className={css.AbsoluteFooter}
            justifyContent="SpaceBetween"
            alignContent="Center"
            gap="200"
          >
            <Badge variant="Secondary" fill="Soft">
              <Text size="L400">{millisecondsToMinutesAndSeconds(info.duration ?? 0)}</Text>
            </Badge>
            <Badge variant="Secondary" fill="Soft">
              <Text size="L400">{bytesToSize(info.size)}</Text>
            </Badge>
          </Box>
        )}
      </Box>
    );
  }
);