import { useQuery } from "@tanstack/react-query";

import { customersService } from "@/services/customers.service";

/**
 * Registered customer companies, as Autocomplete options. The picker is an
 * Autocomplete rather than a Select on purpose: a company that is not on the
 * system yet is typed in, and only the name is kept.
 */
export function useCompanyOptions() {
  const { data, isLoading } = useQuery({
    queryKey: ["companies-autocomplete"],
    queryFn: () => customersService.list({ page: 1, pageSize: 1000 }),
    staleTime: 5 * 60 * 1000,
  });

  const companies = data?.items ?? [];

  // Company names are not unique — Mantine throws on duplicate option values,
  // so the list is deduped by the trimmed name.
  const names = [...new Set(companies.map((c) => c.name.trim()).filter(Boolean))];

  return {
    loading: isLoading,
    names,
    /**
     * Name → company id, only when exactly one company carries that name. An
     * ambiguous name resolves to nothing rather than to an arbitrary company:
     * the container keeps the typed name and no wrong customer is attached.
     */
    resolveId: (name: string): string | undefined => {
      const key = name.trim().toLowerCase();
      const matches = companies.filter((c) => c.name.trim().toLowerCase() === key);
      return matches.length === 1 ? matches[0].id : undefined;
    },
  };
}