import { useActionQuery } from "@agent-native/core/client/hooks";
import { IconArrowsShuffle, IconFeather, IconSearch } from "@tabler/icons-react";
import { useMemo, useState } from "react";

import { QuoteCard } from "@/components/quotes/QuoteCard";
import { SubmitQuoteDialog } from "@/components/quotes/SubmitQuoteDialog";
import { TagFilterBar } from "@/components/quotes/TagFilterBar";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Skeleton } from "@/components/ui/skeleton";
import { useVisitorId } from "@/lib/visitor-id";

export function meta() {
  return [
    { title: "Verse — quotes drawn from poems" },
    {
      name: "description",
      content: "Discover, search, and save quotes drawn from classic and community-submitted poems.",
    },
  ];
}

export function HydrateFallback() {
  return (
    <div className="flex items-center justify-center h-screen">
      <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-foreground" />
    </div>
  );
}

function DailyQuoteHero() {
  const visitorId = useVisitorId();
  const { data: quote, isLoading, refetch, isFetching } = useActionQuery("get-random-quote", {
    visitorId,
  });

  return (
    <div className="rounded-xl border bg-card p-6 sm:p-8">
      <div className="mb-3 flex items-center justify-between">
        <div className="flex items-center gap-2 text-sm font-medium text-muted-foreground">
          <IconFeather className="size-4" />
          Quote of the moment
        </div>
        <Button
          type="button"
          variant="outline"
          size="sm"
          className="gap-1.5"
          disabled={isFetching}
          onClick={() => refetch()}
        >
          <IconArrowsShuffle className="size-4" />
          Shuffle
        </Button>
      </div>
      {isLoading ? (
        <div className="space-y-3">
          <Skeleton className="h-6 w-full" />
          <Skeleton className="h-6 w-2/3" />
          <Skeleton className="h-4 w-1/3" />
        </div>
      ) : quote ? (
        <QuoteCard quote={quote} className="border-0 p-0 shadow-none" />
      ) : (
        <p className="text-sm text-muted-foreground">
          No quotes yet — be the first to submit one below.
        </p>
      )}
    </div>
  );
}

export default function QuotesHomeRoute() {
  const visitorId = useVisitorId();
  const [search, setSearch] = useState("");
  const [activeTag, setActiveTag] = useState<string | null>(null);

  const { data: quotes, isLoading } = useActionQuery("list-quotes", { visitorId });

  const allTags = useMemo(() => {
    const set = new Set<string>();
    for (const q of quotes ?? []) for (const tag of q.tags) set.add(tag);
    return Array.from(set).sort();
  }, [quotes]);

  const filtered = useMemo(() => {
    const term = search.trim().toLowerCase();
    return (quotes ?? []).filter((q) => {
      if (activeTag && !q.tags.includes(activeTag)) return false;
      if (!term) return true;
      const haystack = `${q.text} ${q.poem.title} ${q.poem.author}`.toLowerCase();
      return haystack.includes(term);
    });
  }, [quotes, search, activeTag]);

  return (
    <div className="mx-auto flex max-w-4xl flex-col gap-6 p-4 sm:p-6">
      <div className="flex flex-col gap-1">
        <h1 className="text-2xl font-semibold tracking-tight">Verse</h1>
        <p className="text-sm text-muted-foreground">
          Quotes drawn from poems — browse, search, and save your favorites.
        </p>
      </div>

      <DailyQuoteHero />

      <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
        <div className="relative flex-1 sm:max-w-xs">
          <IconSearch className="pointer-events-none absolute left-2.5 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
          <Input
            value={search}
            onChange={(e) => setSearch(e.target.value)}
            placeholder="Search quotes, poets, poems..."
            className="pl-8"
          />
        </div>
        <SubmitQuoteDialog />
      </div>

      <TagFilterBar tags={allTags} activeTag={activeTag} onSelect={setActiveTag} />

      {isLoading ? (
        <div className="grid gap-4 sm:grid-cols-2">
          {Array.from({ length: 4 }).map((_, i) => (
            <Skeleton key={i} className="h-48 w-full" />
          ))}
        </div>
      ) : filtered.length === 0 ? (
        <p className="py-12 text-center text-sm text-muted-foreground">
          No quotes match. Try a different search or tag.
        </p>
      ) : (
        <div className="grid gap-4 sm:grid-cols-2">
          {filtered.map((quote) => (
            <QuoteCard
              key={quote.id}
              quote={quote}
              onTagClick={(tag) => setActiveTag(tag)}
            />
          ))}
        </div>
      )}
    </div>
  );
}