"use client";

import { useCallback, useMemo, useState } from "react";

import { performSingleCheckout } from "@/entities/payment/actions";
import { PaymentInfo, SingleCheckoutRequest } from "@/entities/payment/types";

interface UseSingleCheckoutOptions {
  returnUrl?: string;
  onSuccess?: () => void;
  onError?: (error: string) => void;
}

export function useSingleCheckout(options: UseSingleCheckoutOptions = {}) {
  const [isLoading, setIsLoading] = useState(false);

  const { returnUrl, onSuccess, onError } = options;

  const handleSingleCheckout = useCallback(
    async (paymentInfo: PaymentInfo) => {
      if (isLoading) return;

      setIsLoading(true);
      let shouldResetLoading = true;

      try {
        const payload: SingleCheckoutRequest = {
          paymentInfo,
          pageUrl: typeof window !== "undefined" ? window.location.href : "",
          return_url: returnUrl,
        };

        const response = await performSingleCheckout(payload);

        if (response.error) {
          onError?.(response.error);
          return;
        }

        if (!response.data) {
          onError?.("Payment failed");
          return;
        }

        if ("payment" in response.data) {
          const { status, paymentUrl } = response.data.payment;

          if (paymentUrl) {
            // При редиректе на внешний платеж не сбрасываем isLoading
            shouldResetLoading = false;
            window.location.replace(paymentUrl);
            return;
          }

          if (status === "paid") {
            // При успешной покупке НЕ сбрасываем isLoading
            // onSuccess callback сам будет управлять состоянием через isNavigating
            shouldResetLoading = false;
            await onSuccess?.();
            return;
          } else {
            onError?.("Payment status is not paid");
          }
        } else {
          const errorMessage = response.data.message || "Payment failed";
          onError?.(errorMessage);
        }
      } catch (error) {
        const errorMessage =
          error instanceof Error ? error.message : "Payment failed";
        onError?.(errorMessage);
      } finally {
        // Сбрасываем isLoading только если не было успешного платежа или редиректа
        if (shouldResetLoading) {
          setIsLoading(false);
        }
      }
    },
    [isLoading, returnUrl, onError, onSuccess]
  );

  return useMemo(
    () => ({
      handleSingleCheckout,
      isLoading,
    }),
    [handleSingleCheckout, isLoading]
  );
}