<script lang="ts">
  import { library } from "$lib/stores/library";
  import { goto } from "$app/navigation";
  import { page } from "$app/stores";
  import Search from "$lib/components/Search.svelte";
  import SearchResults from "$lib/components/search/SearchResults.svelte";
  import SearchScopeChips from "$lib/components/search/SearchScopeChips.svelte";
  import { resolveSearchScope, type SearchScope } from "$lib/utils/searchScope";
  import type { MediaItem } from "$lib/api/types";

  let searchQuery = $state("");

  // Route resolves the *initial* scope only. Deriving it reactively would snap
  // a user who widened to All back to the route's scope on any navigation.
  // TRACES: UR-049 | DR-064
  let scope = $state<SearchScope>(resolveSearchScope($page.url.pathname));

  async function handleSearch(query: string) {
    if (query.trim()) {
      await library.search(query, scope);
    } else {
      library.clearSearch();
    }
  }

  // Changing the chip re-runs the current query; changing the query keeps scope.
  async function handleScopeChange(next: SearchScope) {
    scope = next;
    if (searchQuery.trim()) {
      await library.search(searchQuery, next);
    }
  }

  function handleItemClick(item: MediaItem) {
    switch (item.type) {
      case "Audio":
        // Navigate to album page if available, otherwise detail page
        if (item.albumId) {
          goto(`/library/${item.albumId}`);
        } else {
          goto(`/library/${item.id}`);
        }
        break;
      case "MusicAlbum":
      case "MusicArtist":
      case "Series":
      case "Movie":
        // Navigate to detail page to show metadata and cast
        goto(`/library/${item.id}`);
        break;
      case "Episode":
        // Episodes play directly
        goto(`/player/${item.id}`);
        break;
      default:
        goto(`/library/${item.id}`);
        break;
    }
  }
</script>

<div class="max-w-6xl mx-auto">
  <h1 class="text-2xl font-bold mb-6">Search</h1>

  <!-- Search Input -->
  <div class="mb-6 space-y-3">
    <Search
      bind:value={searchQuery}
      placeholder="Search your library..."
      onSearch={handleSearch}
    />
    <SearchScopeChips {scope} onChange={handleScopeChange} />
  </div>

  <!-- Search Results -->
  {#if searchQuery.trim()}
    <SearchResults
      results={$library.searchResults}
      loading={$library.loadingCount > 0}
      {scope}
      onItemClick={handleItemClick}
    />
  {:else}
    <div class="text-center text-gray-400 mt-12">
      <svg class="w-16 h-16 mx-auto mb-4 text-gray-600" fill="currentColor" viewBox="0 0 24 24">
        <path d="M15.5 14h-.79l-.28-.27C15.41 12.59 16 11.11 16 9.5 16 5.91 13.09 3 9.5 3S3 5.91 3 9.5 5.91 16 9.5 16c1.61 0 3.09-.59 4.23-1.57l.27.28v.79l5 4.99L20.49 19l-4.99-5zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"/>
      </svg>
      <p>Search your entire library</p>
      <p class="text-sm text-gray-500 mt-2">Find music, movies, shows, and more</p>
    </div>
  {/if}
</div>
