jellytau/src/routes/+page.svelte

<script lang="ts">
  import { onMount } from "svelte";
  import { goto } from "$app/navigation";
  import { platform } from "@tauri-apps/plugin-os";
  import { auth, isAuthenticated } from "$lib/stores/auth";
  import { home } from "$lib/stores/home";
  import { library, libraries } from "$lib/stores/library";
  import { isServerReachable } from "$lib/stores/connectivity";
  import { currentMedia } from "$lib/stores/player";
  import HeroBanner from "$lib/components/home/HeroBanner.svelte";
  import Carousel from "$lib/components/home/Carousel.svelte";
  import MosaicGrid from "$lib/components/library/MosaicGrid.svelte";
  import MosaicTile from "$lib/components/library/MosaicTile.svelte";
  import { assumedLibraryRatio } from "$lib/components/library/libraryMosaic";
  import { useScrollRestore } from "$lib/utils/scrollContainer";
  import type { MediaItem, Library } from "$lib/api/types";
  import { createLogger } from "$lib/utils/logger";

  const log = createLogger("HomePage");

  // Home scrolls in its own box rather than the shell's, and is destroyed on
  // every navigation away — so its offsets live in the module-level memory,
  // letting Back return the viewer to their row instead of the top. (DR-156)
  let homeScroller = $state<HTMLElement>();
  useScrollRestore(() => homeScroller, "home");

  // Track if we've done an initial load (plain variable, not reactive)
  let hasLoadedOnce = false;
  let previousServerReachable = false;
  let isAndroid = $state(false);

  // Redirect to login if not authenticated
  $effect(() => {
    if (!$isAuthenticated) {
      goto("/login");
    }
  });

  // Load home sections when authenticated
  onMount(async () => {
    // Detect platform
    try {
      const platformName = await platform();
      isAndroid = platformName === "android";
    } catch (err) {
      log.error("Platform detection failed:", err);
    }

    if ($isAuthenticated) {
      await home.loadHomeSections();
      if ($libraries.length === 0) {
        await library.loadLibraries();
      }
      hasLoadedOnce = true;
    }
  });

  // Reload when server becomes reachable (handles startup timing issue)
  $effect(() => {
    const serverReachable = $isServerReachable;

    // If server just became reachable and we've already done initial load, reload to get fresh data
    if (serverReachable && !previousServerReachable && hasLoadedOnce && $isAuthenticated) {
      home.loadHomeSections();
    }

    // Update tracking (outside reactive context to avoid re-triggering)
    previousServerReachable = serverReachable;
  });

  // Tap → detail page. Non-playable containers already routed to /library; now
  // movies and episodes go to their detail page too instead of playing straight
  // away. Channel leaves (no detail page) still go direct to the player.
  // TRACES: UR-058 | DR-087
  function handleItemClick(item: MediaItem) {
    switch (item.kind) {
      case "channelItem":
      case "liveChannel":
        goto(`/player/${item.id}`);
        break;
      case "episode":
        // An episode is never browsed as a bare Episode page — it opens in its
        // series' Episode Focus View so the series context loads (ux-flows §5B.1).
        if (item.seriesId) {
          goto(`/library/${item.seriesId}?episode=${item.id}`);
        } else {
          goto(`/library/${item.id}`);
        }
        break;
      default:
        goto(`/library/${item.id}`);
        break;
    }
  }

  // Long press → play immediately, confirming first so an accidental hold on a
  // half-watched item doesn't blow away the user's spot without warning.
  // TRACES: UR-058 | DR-087
  function handleItemLongPress(item: MediaItem) {
    switch (item.kind) {
      case "movie":
      case "episode":
      case "channelItem":
      case "liveChannel":
        if (confirm(`Play "${item.name}" now?`)) {
          goto(`/player/${item.id}`);
        }
        break;
      default:
        // Containers (series/season/album/…) have no single "play now" target.
        goto(`/library/${item.id}`);
        break;
    }
  }

  // Playlist libraries live inside the Music landing page, not as top-level shortcuts.
  const shortcutLibraries = $derived(
    $libraries.filter((lib) => lib.collectionType !== "playlists"),
  );

  // The shortcut strip is a mosaic row: one height, each tile as wide as its own
  // artwork. It used to force 16:9 on everything so square music covers lined up
  // with wide backdrops — which lined them up by cropping the covers.
  // TRACES: UR-075 | DR-174
  const LIBRARY_STRIP_HEIGHT = 132;
  const libraryTiles = $derived(
    shortcutLibraries.map((lib) => ({
      key: lib.id,
      ratio: assumedLibraryRatio(lib),
      library: lib,
    })),
  );

  function handleLibraryClick(lib: Library) {
    // Mirror /library routing: dedicated landing pages need currentLibrary set.
    library.setCurrentLibrary(lib);
    switch (lib.collectionType) {
      case "music":
        goto("/library/music");
        break;
      case "tvshows":
        goto("/library/tv");
        break;
      case "movies":
        goto("/library/movies");
        break;
      default:
        library.clearGenres();
        goto("/library");
        break;
    }
  }

  const heroItems = $derived($home.heroItems);
  const resumeItems = $derived(
    $home.resumeItems.filter((i) => i.kind === "movie" || i.kind === "episode"),
  );
  const nextUpItems = $derived($home.nextUpItems);
  const latestItems = $derived($home.latestItems);
  const recentlyPlayedAudio = $derived($home.recentlyPlayedAudio);
  // Favourite rows. Each is hidden when empty, so a fresh install shows none.
  // TRACES: UR-067 | DR-118
  const favoriteMovies = $derived($home.favoriteMovies);
  const favoriteShows = $derived($home.favoriteShows);
  const favoriteMusic = $derived($home.favoriteMusic);
  const resumeMovies = $derived($home.resumeMovies);
  const isLoading = $derived($home.isLoading);
</script>

{#if isLoading}
  <div class="h-full flex justify-center items-center">
    <div
      class="w-8 h-8 border-2 border-[var(--color-jellyfin)] border-t-transparent rounded-full animate-spin"
    ></div>
  </div>
{:else}
  <div
    bind:this={homeScroller}
    class="h-full overflow-y-auto p-4 pb-16 md:pb-4 {isAndroid &&
    $currentMedia &&
    $currentMedia.type !== 'Movie' &&
    $currentMedia.type !== 'Episode'
      ? 'pb-40'
      : ''}"
  >
    <div class="space-y-8">
      <!-- Hero Banner -->
      {#if heroItems.length > 0}
        <HeroBanner items={heroItems} />
      {/if}

      <!-- Your Libraries: quick jump into each dedicated landing page -->
      {#if shortcutLibraries.length > 0}
        <div>
          <h2 class="text-xl font-bold text-white mb-4 px-4">Your Libraries</h2>
          <div class="px-4">
            <MosaicGrid
              items={libraryTiles}
              layout="strip"
              targetHeight={LIBRARY_STRIP_HEIGHT}
              gap={12}
            >
              {#snippet tile(entry)}
                <MosaicTile
                  label={entry.library.name}
                  width={entry.width}
                  height={entry.height}
                  itemId={entry.library.id}
                  imageTag={entry.library.imageTag}
                  onRatio={entry.reportRatio}
                  onclick={() => handleLibraryClick(entry.library)}
                />
              {/snippet}
            </MosaicGrid>
          </div>
        </div>
      {/if}

      <!-- Next Movie -->
      {#if resumeMovies.length > 0}
        <Carousel
          title="Next Movie"
          items={resumeMovies}
          onItemClick={handleItemClick}
          onItemLongPress={handleItemLongPress}
        />
      {/if}

      <!-- Next Episode -->
      {#if nextUpItems.length > 0}
        <Carousel
          title="Next Episode"
          items={nextUpItems}
          onItemClick={handleItemClick}
          onItemLongPress={handleItemLongPress}
        />
      {/if}

      <!-- Recently Listened -->
      {#if recentlyPlayedAudio.length > 0}
        <Carousel
          title="Recently Listened"
          items={recentlyPlayedAudio}
          onItemClick={handleItemClick}
          onItemLongPress={handleItemLongPress}
        />
      {/if}

      <!-- Continue Watching -->
      {#if resumeItems.length > 0}
        <Carousel
          title="Continue Watching"
          items={resumeItems}
          onItemClick={handleItemClick}
          onItemLongPress={handleItemLongPress}
        />
      {/if}

      <!-- Recently Added -->
      {#if latestItems.length > 0}
        <Carousel
          title="Recently Added"
          items={latestItems}
          onItemClick={handleItemClick}
          onItemLongPress={handleItemLongPress}
        />
      {/if}

      <!-- Favourites. Hidden entirely when a category has nothing in it —
         empty rows on a fresh install read as broken. ux-flows §5C.2.
         TRACES: UR-067 | DR-118 -->
      {#if favoriteMovies.length > 0}
        <Carousel
          title="Favourite Movies"
          items={favoriteMovies}
          onItemClick={handleItemClick}
          onItemLongPress={handleItemLongPress}
          showAll={() => goto("/library/favorites?scope=movies")}
        />
      {/if}

      {#if favoriteShows.length > 0}
        <Carousel
          title="Favourite Shows"
          items={favoriteShows}
          onItemClick={handleItemClick}
          onItemLongPress={handleItemLongPress}
          showAll={() => goto("/library/favorites?scope=tv")}
        />
      {/if}

      {#if favoriteMusic.length > 0}
        <Carousel
          title="Favourite Music"
          items={favoriteMusic}
          onItemClick={handleItemClick}
          onItemLongPress={handleItemLongPress}
          showAll={() => goto("/library/favorites?scope=music")}
        />
      {/if}

      <!-- Quick Access -->
      <div class="pt-4 px-4">
        <button
          onclick={() => goto("/library")}
          class="text-[var(--color-jellyfin)] hover:underline text-lg"
        >
          Browse all libraries →
        </button>
      </div>
    </div>
  </div>
{/if}