"use client";

import { useEffect, useMemo, useRef, useState } from "react";
import { MarketplaceFilters } from "@/components/marketplace-filters";
import { ItemCard } from "@/components/item-card";

interface Item {
  id: string | number;
  name: string;
  category: string;
  image?: string;
  rarity?: string;
  npcPrice?: number;
  price?: { buy: number; sell: number };
  priceHistory?: { highest: number; lowest: number; average: number };
  level?: number;
  weight?: number;
  slots?: number;
  skill?: string;
}

interface InitialData {
  items: Item[];
  total: number;
  page: number;
  pageSize: number;
  totalPages: number;
}

export default function LibraryClient({ initial }: { initial: InitialData }) {
  const [items, setItems] = useState<Item[]>(initial.items);
  const [total, setTotal] = useState<number>(initial.total);
  const [page, setPage] = useState<number>(initial.page || 1);
  const [pageSize] = useState<number>(initial.pageSize || 24);
  const [totalPages, setTotalPages] = useState<number>(initial.totalPages || 1);

  const [query, setQuery] = useState<string>("");
  const [categories, setCategories] = useState<string[]>([]);
  const [rarities, setRarities] = useState<string[]>([]);
  const [sort, setSort] = useState<string>("name");
  const [categoryOptions, setCategoryOptions] = useState<{ value: string; label: string }[] | undefined>(undefined);

  const debounceRef = useRef<number | undefined>(undefined);

  const searchParams = useMemo(() => {
    const p = new URLSearchParams();
    if (query) p.set("q", query);
    if (categories.length > 0) p.set("category", categories.join(","));
    if (rarities.length > 0) p.set("rarity", rarities.join(","));
    if (sort) p.set("sort", sort);
    p.set("page", String(page));
    p.set("pageSize", String(pageSize));
    return p;
  }, [query, categories, rarities, sort, page, pageSize]);

  useEffect(() => {
    // Debounce para evitar chamadas excessivas
    window.clearTimeout(debounceRef.current);
    debounceRef.current = window.setTimeout(async () => {
      const res = await fetch(`/api/items?${searchParams.toString()}`);
      if (!res.ok) return;
      const data = await res.json();
      setItems(data.items);
      setTotal(data.total);
      setTotalPages(data.totalPages);
    }, 250);
    return () => window.clearTimeout(debounceRef.current);
  }, [searchParams]);

  // Carregar categorias dinâmicas a partir das tabelas do banco
  useEffect(() => {
    (async () => {
      try {
        const res = await fetch("/api/items/categories");
        if (!res.ok) return;
        const data = await res.json();
        if (Array.isArray(data.categories)) {
          const opts = (data.categories as string[]).map((c) => ({ value: c, label: c.charAt(0).toUpperCase() + c.slice(1) }));
          setCategoryOptions(opts);
        }
      } catch {
        // no-op
      }
    })();
  }, []);

  const onSearch = (q: string) => {
    setPage(1);
    setQuery(q);
  };
  const onFilter = (f: { rarity: string[]; category: string[]; priceRange?: { min: number; max: number } }) => {
    setPage(1);
    setCategories(f.category || []);
    setRarities(f.rarity || []);
  };
  const onSort = (s: string) => {
    setPage(1);
    setSort(s);
  };

  return (
    <div className="space-y-8">
      <MarketplaceFilters onSearch={onSearch} onFilter={onFilter} onSort={onSort} totalItems={total} showRarity={false} categoryOptionsOverride={categoryOptions} />

      <section className="grid gap-6 grid-cols-2 sm:grid-cols-3 lg:grid-cols-4 xl:grid-cols-6">
        {items.map((item) => (
          <ItemCard
            key={`${String(item.category || "")}::${String(item.id)}`}
            item={{
              id: String(item.id),
              name: item.name,
              image: item.image ?? "",
              category: (item.category as any) ?? "other",
              rarity: (item.rarity as any) ?? "common",
              stats: {
                weight: typeof item.weight === "number" ? item.weight : undefined,
                slots: typeof item.slots === "number" ? item.slots : undefined,
              } as any,
              requirements: {
                level: typeof item.level === "number" ? item.level : undefined,
                skill: typeof item.skill === "string" && item.skill !== "Nenhum." ? item.skill : undefined,
              } as any,
            } as any}
            mode="catalog"
          />)
        )}
      </section>

      <div className="flex items-center justify-center gap-2">
        <button
          className="px-3 py-1 rounded border text-sm hover:bg-muted disabled:opacity-50"
          onClick={() => setPage((p) => Math.max(1, p - 1))}
          disabled={page <= 1}
        >
          Anterior
        </button>
        <span className="text-sm text-muted-foreground">Página {page} de {totalPages}</span>
        <button
          className="px-3 py-1 rounded border text-sm hover:bg-muted disabled:opacity-50"
          onClick={() => setPage((p) => Math.min(totalPages, p + 1))}
          disabled={page >= totalPages}
        >
          Próxima
        </button>
      </div>
    </div>
  );
}