import { RefObject, useEffect, useState } from "react";
import { useIntl } from "react-intl";

import { DEFAULT_INITIAL_SEARCH_DATA } from "@saleor/config";
import { ChangeEvent, FormChange } from "@saleor/hooks/useForm";
import useModalDialogOpen from "@saleor/hooks/useModalDialogOpen";
import useNavigator from "@saleor/hooks/useNavigator";
import { maybe } from "@saleor/misc";
import { useOrderDraftCreateMutation } from "@saleor/orders/mutations";
import { orderUrl } from "@saleor/orders/urls";
import useCustomerSearch from "@saleor/searches/useCustomerSearch";
import getModeActions from "./modes";
import { getGqlOrderId, isQueryValidOrderNumber } from "./modes/orders";
import useCheckIfOrderExists from "./queries/useCheckIfOrderExists";
import { QuickSearchAction, QuickSearchMode } from "./types";

type UseQuickSearch = [
  string,
  QuickSearchMode,
  FormChange,
  QuickSearchAction[]
];
function useQuickSearch(
  open: boolean,
  input: RefObject<HTMLInputElement>
): UseQuickSearch {
  const [query, setQuery] = useState("");
  const [mode, setMode] = useState<QuickSearchMode>("default");
  const intl = useIntl();
  const navigate = useNavigator();
  const [{ data: orderData }, getOrderData] = useCheckIfOrderExists();
  const { result: customers, search: searchCustomers } = useCustomerSearch({
    variables: {
      ...DEFAULT_INITIAL_SEARCH_DATA,
      first: 5
    }
  });
  const [createOrder] = useOrderDraftCreateMutation({
    onCompleted: result => {
      if (result.draftOrderCreate.errors.length === 0) {
        navigate(orderUrl(result.draftOrderCreate.order.id));
      }
    }
  });

  useModalDialogOpen(open, {
    onClose: () => {
      setMode("default");
      setQuery("");
    }
  });

  const handleBack = (event: KeyboardEvent) => {
    // `any` type because of poorly typed `KeyboardEvent.EventTarget` which
    // has no `value` key. Which it would have if `KeyboardEvent` and
    // `EventTarget` would be generic types accepting HTMLDOM element types.
    if ((event.target as any).value === "" && event.keyCode === 8) {
      setMode("default");
    }
  };

  useEffect(() => {
    setQuery("");
    if (mode !== "default" && input.current) {
      input.current.addEventListener("keyup", handleBack);

      return () => {
        if (input.current) {
          input.current.removeEventListener("keyup", handleBack);
        }
      };
    }
  }, [mode, open]);

  const change = (event: ChangeEvent) => {
    const value = event.target.value;

    if (mode === "default") {
      switch (value) {
        case "> ":
          setMode("commands");
          break;
        case "@ ":
          setMode("customers");
          break;
        case "# ":
          setMode("orders");
          break;
        default:
          setQuery(value);
      }
    } else {
      if (mode === "orders" && isQueryValidOrderNumber(value)) {
        getOrderData(getGqlOrderId(value));
      }
      setQuery(value);
    }

    if ((["customers", "default"] as QuickSearchMode[]).includes(mode)) {
      searchCustomers(value);
    }
  };

  return [
    query,
    mode,
    change,
    getModeActions(
      mode,
      query,
      intl,
      {
        customers: maybe(
          () => customers.data.search.edges.map(edge => edge.node),
          []
        ),
        order: maybe(() => orderData.order)
      },
      {
        createOrder,
        navigate
      }
    )
  ];
}

export default useQuickSearch;