import { useState } from "react";
import toast from "react-hot-toast";
import { IoCopyOutline, IoWifiOutline } from "react-icons/io5";
import { MdOutlineDns } from "react-icons/md";
import { FaBolt } from "react-icons/fa6";
import { BsShieldExclamation } from "react-icons/bs";
import { useMutation } from "@tanstack/react-query";
import { AxiosError } from "axios";
import MuiModal from "../../../../common/modal";
import Button from "../../../../components/button";
import Input from "../../../../components/input";
import Alert from "../../../../components/alert/Alert";
import { ModalDnsConfigProps } from "../../../../types/props";
import useAxios from "../../../../hooks/useAxios";
import { queryClient } from "../../../../main";

const IP_ADDRESS_REGEX =
  /^(((\d{1,3}\.){3}\d{1,3})|([0-9a-fA-F:]+:+[0-9a-fA-F:]+))$/;

const CLIENT_IP_ENDPOINTS = [
  {
    url: "https://api64.ipify.org?format=json",
    parse: async (res: Response) => (await res.json())?.ip,
  },
  {
    url: "https://api.ipify.org?format=json",
    parse: async (res: Response) => (await res.json())?.ip,
  },
  {
    url: "https://icanhazip.com",
    parse: async (res: Response) => (await res.text()).trim(),
  },
];

const getErrorMessage = (err: AxiosError) => {
  const responseData = err.response?.data;
  if (
    responseData &&
    typeof responseData === "object" &&
    "alert" in responseData
  ) {
    return (responseData as { alert: string }).alert;
  }
  return "یک خطای غیرمنتظره رخ داد";
};

const ModalDnsConfig = ({
  isOpen,
  setIsOpen,
  nameConfig,
  orderId,
  primaryIpv4,
  secondaryIpv4,
  primaryIpv6,
  secondaryIpv6,
  dnsIpPending,
  dnsRegistrationExpired,
}: ModalDnsConfigProps) => {
  const axios = useAxios();
  const [ip, setIp] = useState("");
  const [isDetecting, setIsDetecting] = useState(false);

  const copyToClipboard = async (label: string, textToCopy?: string | null) => {
    if (!textToCopy) return;
    try {
      await navigator.clipboard.writeText(textToCopy);
      toast.success(`${label} کپی شد!`);
    } catch (err) {
      toast.error(`کپی انجام نشد: ${err}`);
    }
  };

  const registerIpMutation = useMutation({
    mutationKey: ["registerDnsIp", orderId],
    mutationFn: (ipToRegister: string) => {
      return axios.post(`/profile/dns/${orderId}/register-ip`, {
        ip: ipToRegister,
      });
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ["profile"] });
    },
  });

  const registerIp = async (ipToRegister: string) => {
    const normalizedIp = ipToRegister.trim();
    if (!orderId) {
      toast.error("شناسه سفارش نامعتبر است");
      return;
    }
    if (!IP_ADDRESS_REGEX.test(normalizedIp)) {
      toast.error("آی‌پی وارد شده معتبر نیست");
      return;
    }
    setIp(normalizedIp);
    try {
      await toast.promise(registerIpMutation.mutateAsync(normalizedIp), {
        loading: "درحال ذخیره آی‌پی...",
        success: (res) => res?.data?.alert || "آی‌پی با موفقیت ذخیره شد",
        error: (err: AxiosError) => getErrorMessage(err),
      });
    } catch {
      return;
    }
  };

  const handleAutoDetectIp = async () => {
    setIsDetecting(true);
    try {
      for (const endpoint of CLIENT_IP_ENDPOINTS) {
        try {
          const res = await fetch(endpoint.url, { cache: "no-store" });
          if (!res.ok) continue;

          const detectedIp = await endpoint.parse(res);
          if (detectedIp && IP_ADDRESS_REGEX.test(detectedIp)) {
            setIp(detectedIp);
            toast.success("آی‌پی کاربر دریافت شد");
            return;
          }
        } catch {
          continue;
        }
      }

      toast.error("دریافت آی‌پی خودکار ممکن نشد");
    } catch (err) {
      toast.error(`دریافت آی‌پی خودکار با خطا مواجه شد: ${err}`);
    } finally {
      setIsDetecting(false);
    }
  };

  const ipRows: { label: string; badge: string; value?: string | null }[] = [
    { label: "DNS نسل 4", badge: "v4", value: primaryIpv4 },
    { label: "DNS نسل 4", badge: "v4", value: secondaryIpv4 },
    { label: "DNS نسل 6", badge: "v6", value: primaryIpv6 },
    { label: "DNS نسل 6", badge: "v6", value: secondaryIpv6 },
  ].filter((row) => row.value);

  return (
    <MuiModal isOpenModal={isOpen} setIsOpenModal={setIsOpen} nameService={nameConfig}>
      <div className="w-full h-full flex flex-col gap-4 max-sm:text-xs max-md:text-sm text-base">
        {dnsRegistrationExpired && (
          <Alert type="danger" extra="!mb-0 !rounded-lg">
            مهلت ثبت آی‌پی برای این سرویس به پایان رسیده است
          </Alert>
        )}
        {dnsIpPending && !dnsRegistrationExpired && (
          <Alert type="warning" extra="!mb-0 !rounded-lg">
            ثبت آی‌پی این سرویس در انتظار تایید است
          </Alert>
        )}

        {ipRows.length > 0 && (
          <div className="w-full flex flex-col gap-2">
            <div className="flex flex-row-reverse items-center gap-1.5 text-secondTheme font-bold">
              <MdOutlineDns className="w-4 h-4" />
              <span>آدرس‌های DNS</span>
            </div>
            <div className="w-full flex flex-col gap-2">
              {ipRows.map((row, index) => (
                <div
                  key={`${row.badge}-${row.value}-${index}`}
                  className="group w-full flex flex-col gap-1.5 bg-gray-900/60 border border-gray-700 hover:border-secondTheme/50 transition-colors rounded-lg p-2.5"
                >
                  <div className="w-full flex flex-row-reverse items-center justify-between gap-2">
                    <div className="flex flex-row-reverse items-center gap-2 min-w-0">
                      <span className="shrink-0 text-[10px] md:text-xs font-bold px-2 py-0.5 rounded-full bg-secondTheme/10 text-secondTheme border border-secondTheme/30">
                        {row.badge}
                      </span>
                      <span className="text-gray-300 whitespace-nowrap">{row.label}</span>
                    </div>
                    <button
                      onClick={() => copyToClipboard(row.label, row.value)}
                      className="shrink-0 p-2 rounded-md bg-gray-800 text-gray-300 hover:bg-secondTheme hover:text-gray-900 transition-colors"
                      title="کپی"
                    >
                      <IoCopyOutline className="w-4 h-4" />
                    </button>
                  </div>
                  <div
                    className="w-full text-start break-all font-mono text-secondTheme/90"
                    dir="ltr"
                  >
                    {row.value}
                  </div>
                </div>
              ))}
            </div>
          </div>
        )}

        <div className="w-full flex flex-row-reverse items-start gap-2 bg-yellow-500/10 border border-yellow-500/30 text-yellow-300 rounded-lg p-3">
          <BsShieldExclamation className="w-8 h-8 md:w-5 md:h-5 shrink-0 mt-0.5" />
          <span className="text-start leading-6">
            در صورت روشن بودن فیلترشکن (VPN)، برای ثبت صحیح آی‌پی، لطفا ابتدا آن را خاموش کنید.
          </span>
        </div>

        <div className="w-full flex flex-col gap-2.5 bg-gray-900/60 border border-gray-700 rounded-lg p-3">
          <div className="flex flex-row-reverse items-center gap-1.5 text-secondTheme font-bold">
            <IoWifiOutline className="w-4 h-4" />
            <span>ثبت آی‌پی</span>
          </div>
          <div className="w-full flex flex-row-reverse gap-2">
            <div className="flex-1 min-w-0">
              <Input
                type="text"
                dir="ltr"
                placeholder="آی‌پی خود را وارد کنید"
                value={ip}
                onChange={(e) => setIp(e.target.value)}
                extra="!text-start"
              />
            </div>
            <Button
              onClick={() => registerIp(ip)}
              disabled={registerIpMutation.isPending || !ip.trim()}
              extra="!m-0 !px-3 shadow-md shrink-0 disabled:!opacity-50"
            >
              ذخیره آی‌پی
            </Button>
          </div>
          <Button
            onClick={handleAutoDetectIp}
            disabled={isDetecting || registerIpMutation.isPending}
            extra="!m-0 !px-3 !bg-secondTheme !text-gray-900 font-bold shadow-md shadow-secondTheme/30 hover:!bg-secondTheme/80 flex flex-row-reverse justify-center items-center gap-2 disabled:!opacity-50"
          >
            <FaBolt className={`w-4 h-4 ${isDetecting ? "animate-pulse" : ""}`} />
            {isDetecting ? "در حال تشخیص..." : "دریافت آی‌پی کاربر"}
          </Button>
        </div>
      </div>
    </MuiModal>
  );
};

export default ModalDnsConfig;