import { useCallback, useRef, useState } from "react";
import type { KisRuntimeCredentials } from "@/features/dashboard/store/use-kis-runtime-store";
import type { DashboardStockSearchItem } from "@/features/dashboard/types/dashboard.types";
import { fetchStockSearch } from "@/features/dashboard/apis/kis-stock.api";

export function useStockSearch() {
  const [keyword, setKeyword] = useState("삼성전자");
  const [searchResults, setSearchResults] = useState<
    DashboardStockSearchItem[]
  >([]);
  const [error, setError] = useState<string | null>(null);
  const [isSearching, setIsSearching] = useState(false);
  const requestIdRef = useRef(0);
  const abortRef = useRef<AbortController | null>(null);

  const loadSearch = useCallback(async (query: string) => {
    const requestId = ++requestIdRef.current;
    const controller = new AbortController();
    abortRef.current?.abort();
    abortRef.current = controller;

    setIsSearching(true);
    setError(null);

    try {
      const data = await fetchStockSearch(query, controller.signal);
      if (requestId === requestIdRef.current) {
        setSearchResults(data.items);
      }
      return data.items;
    } catch (err) {
      if (controller.signal.aborted) {
        return [];
      }
      if (requestId === requestIdRef.current) {
        setError(
          err instanceof Error
            ? err.message
            : "종목 검색 중 오류가 발생했습니다.",
        );
      }
      return [];
    } finally {
      if (requestId === requestIdRef.current) {
        setIsSearching(false);
      }
    }
  }, []);

  const search = useCallback(
    (query: string, credentials: KisRuntimeCredentials | null) => {
      if (!credentials) {
        setError("API 키 검증이 필요합니다.");
        setSearchResults([]);
        setIsSearching(false);
        return;
      }

      const trimmed = query.trim();
      if (!trimmed) {
        abortRef.current?.abort();
        setSearchResults([]);
        setError(null);
        setIsSearching(false);
        return;
      }

      void loadSearch(trimmed);
    },
    [loadSearch],
  );

  const clearSearch = useCallback(() => {
    abortRef.current?.abort();
    setSearchResults([]);
    setError(null);
    setIsSearching(false);
  }, []);

  return {
    keyword,
    setKeyword,
    searchResults,
    setSearchResults,
    error,
    setError,
    isSearching,
    search,
    clearSearch,
  };
}