import type {
  BaseItemDto,
  MediaSourceInfo,
} from "@jellyfin/sdk/lib/generated-client/models";
import { Image } from "expo-image";
import { useNavigation } from "expo-router";
import { useAtom } from "jotai";
import React, { useEffect, useMemo, useState } from "react";
import { Platform, View } from "react-native";
import { useSafeAreaInsets } from "react-native-safe-area-context";
import { type Bitrate } from "@/components/BitrateSelector";
import { ItemImage } from "@/components/common/ItemImage";
import { DownloadSingleItem } from "@/components/DownloadItem";
import { ItemPeopleSections } from "@/components/item/ItemPeopleSections";
import { MediaSourceButton } from "@/components/MediaSourceButton";
import { OverviewText } from "@/components/OverviewText";
import { ParallaxScrollView } from "@/components/ParallaxPage";
import { PlayButton } from "@/components/PlayButton";
import { PlayedStatus } from "@/components/PlayedStatus";
import { SimilarItems } from "@/components/SimilarItems";
import { CurrentSeries } from "@/components/series/CurrentSeries";
import { SeasonEpisodesCarousel } from "@/components/series/SeasonEpisodesCarousel";
import useDefaultPlaySettings from "@/hooks/useDefaultPlaySettings";
import { useImageColorsReturn } from "@/hooks/useImageColorsReturn";
import { useOrientation } from "@/hooks/useOrientation";
import * as ScreenOrientation from "@/packages/expo-screen-orientation";
import { apiAtom, userAtom } from "@/providers/JellyfinProvider";
import { useOfflineMode } from "@/providers/OfflineModeProvider";
import { useSettings } from "@/utils/atoms/settings";
import { getLogoImageUrlById } from "@/utils/jellyfin/image/getLogoImageUrlById";
import { AddToFavorites } from "./AddToFavorites";
import { AddToWatchlist } from "./AddToWatchlist";
import { ItemHeader } from "./ItemHeader";
import { ItemTechnicalDetails } from "./ItemTechnicalDetails";
import { PlayInRemoteSessionButton } from "./PlayInRemoteSession";

const Chromecast = !Platform.isTV ? require("./Chromecast") : null;
const ItemContentTV = Platform.isTV
  ? require("./ItemContent.tv").ItemContentTV
  : null;

export type SelectedOptions = {
  bitrate: Bitrate;
  mediaSource: MediaSourceInfo | undefined;
  audioIndex: number | undefined;
  subtitleIndex: number;
};

interface ItemContentProps {
  item?: BaseItemDto | null;
  itemWithSources?: BaseItemDto | null;
  isLoading?: boolean;
}

// Mobile-specific implementation
const ItemContentMobile: React.FC<ItemContentProps> = ({
  item,
  itemWithSources,
}) => {
  const [api] = useAtom(apiAtom);
  const isOffline = useOfflineMode();
  const { settings } = useSettings();
  const { orientation } = useOrientation();
  const navigation = useNavigation();
  const insets = useSafeAreaInsets();
  const [user] = useAtom(userAtom);

  const itemColors = useImageColorsReturn({ item });

  const [loadingLogo, setLoadingLogo] = useState(true);
  const [headerHeight, setHeaderHeight] = useState(350);

  const [selectedOptions, setSelectedOptions] = useState<
    SelectedOptions | undefined
  >(undefined);

  // Use itemWithSources for play settings since it has MediaSources data
  const {
    defaultAudioIndex,
    defaultBitrate,
    defaultMediaSource,
    defaultSubtitleIndex,
  } = useDefaultPlaySettings(itemWithSources ?? item, settings);

  const logoUrl = useMemo(
    () => (item ? getLogoImageUrlById({ api, item }) : null),
    [api, item],
  );

  const onLogoLoad = React.useCallback(() => {
    setLoadingLogo(false);
  }, []);

  const loading = useMemo(() => {
    return Boolean(logoUrl && loadingLogo);
  }, [loadingLogo, logoUrl]);

  // Needs to automatically change the selected to the default values for default indexes.
  useEffect(() => {
    setSelectedOptions(() => ({
      bitrate: defaultBitrate,
      mediaSource: defaultMediaSource ?? undefined,
      subtitleIndex: defaultSubtitleIndex ?? -1,
      audioIndex: defaultAudioIndex,
    }));
  }, [
    defaultAudioIndex,
    defaultBitrate,
    defaultSubtitleIndex,
    defaultMediaSource,
  ]);

  useEffect(() => {
    if (!Platform.isTV && itemWithSources) {
      navigation.setOptions({
        headerRight: () =>
          item &&
          (Platform.OS === "ios" ? (
            <View className='flex flex-row items-center pl-2'>
              <Chromecast.Chromecast width={22} height={22} />
              {item.Type !== "Program" && (
                <View className='flex flex-row items-center'>
                  {!Platform.isTV && (
                    <DownloadSingleItem item={itemWithSources} size='large' />
                  )}
                  {user?.Policy?.IsAdministrator &&
                    !settings.hideRemoteSessionButton && (
                      <PlayInRemoteSessionButton item={item} size='large' />
                    )}

                  <PlayedStatus items={[item]} size='large' />
                  <AddToFavorites item={item} />
                  {settings.streamyStatsServerUrl &&
                    !settings.hideWatchlistsTab && (
                      <AddToWatchlist item={item} />
                    )}
                </View>
              )}
            </View>
          ) : (
            <View className='flex flex-row items-center space-x-2'>
              <Chromecast.Chromecast width={22} height={22} />
              {item.Type !== "Program" && (
                <View className='flex flex-row items-center space-x-2'>
                  {!Platform.isTV && (
                    <DownloadSingleItem item={itemWithSources} size='large' />
                  )}
                  {user?.Policy?.IsAdministrator &&
                    !settings.hideRemoteSessionButton && (
                      <PlayInRemoteSessionButton item={item} size='large' />
                    )}

                  <PlayedStatus items={[item]} size='large' />
                  <AddToFavorites item={item} />
                  {settings.streamyStatsServerUrl &&
                    !settings.hideWatchlistsTab && (
                      <AddToWatchlist item={item} />
                    )}
                </View>
              )}
            </View>
          )),
      });
    }
  }, [
    item,
    navigation,
    user,
    itemWithSources,
    settings.hideRemoteSessionButton,
    settings.streamyStatsServerUrl,
    settings.hideWatchlistsTab,
  ]);

  useEffect(() => {
    if (item) {
      if (orientation !== ScreenOrientation.OrientationLock.PORTRAIT_UP)
        setHeaderHeight(230);
      else if (item.Type === "Movie") setHeaderHeight(500);
      else setHeaderHeight(350);
    }
  }, [item, orientation]);

  if (!item || !selectedOptions) return null;

  return (
    <View
      className='flex-1 relative'
      style={{
        paddingLeft: insets.left,
        paddingRight: insets.right,
      }}
    >
      <ParallaxScrollView
        className='flex-1'
        headerHeight={headerHeight}
        headerImage={
          <View style={[{ flex: 1 }]}>
            <ItemImage
              variant={
                item.Type === "Movie" && logoUrl ? "Backdrop" : "Primary"
              }
              item={item}
              style={{
                width: "100%",
                height: "100%",
              }}
            />
          </View>
        }
        logo={
          logoUrl ? (
            <Image
              source={{
                uri: logoUrl,
              }}
              style={{
                height: 130,
                width: "100%",
              }}
              contentFit='contain'
              onLoad={onLogoLoad}
              onError={onLogoLoad}
            />
          ) : (
            <View />
          )
        }
      >
        <View className='flex flex-col bg-transparent shrink'>
          <View className='flex flex-col px-4 w-full pt-2 mb-2 shrink'>
            <ItemHeader item={item} className='mb-2' />

            <View className='flex flex-row px-0 mb-2 justify-between space-x-2'>
              <PlayButton
                selectedOptions={selectedOptions}
                item={item}
                colors={itemColors}
              />
              <View className='w-1' />
              {!isOffline && (
                <MediaSourceButton
                  selectedOptions={selectedOptions}
                  setSelectedOptions={setSelectedOptions}
                  item={itemWithSources}
                  colors={itemColors}
                />
              )}
            </View>
          </View>
          {item.Type === "Episode" && (
            <SeasonEpisodesCarousel item={item} loading={loading} />
          )}

          {!isOffline &&
            selectedOptions.mediaSource?.MediaStreams &&
            selectedOptions.mediaSource.MediaStreams.length > 0 && (
              <ItemTechnicalDetails source={selectedOptions.mediaSource} />
            )}

          <OverviewText text={item.Overview} className='px-4 mb-4' />

          {item.Type !== "Program" && (
            <>
              {item.Type === "Episode" && !isOffline && (
                <CurrentSeries item={item} className='mb-2' />
              )}

              <ItemPeopleSections item={item} />

              {!isOffline && <SimilarItems itemId={item.Id} />}
            </>
          )}
        </View>
      </ParallaxScrollView>
    </View>
  );
};

// Memoize the mobile component
const MemoizedItemContentMobile = React.memo(ItemContentMobile);

// Exported component that renders TV or mobile version based on platform
export const ItemContent: React.FC<ItemContentProps> = (props) => {
  if (Platform.isTV && ItemContentTV) {
    return <ItemContentTV {...props} />;
  }
  return <MemoizedItemContentMobile {...props} />;
};
