"use client";

import React, { useState, useEffect } from "react";
import { Button } from "@/components/ui/button";
import { useTranslations } from "next-intl";
import {
  InputOTP,
  InputOTPGroup,
  InputOTPSeparator,
  InputOTPSlot,
} from "@/components/ui/input-otp";
import { RegistrationOTPFormProps, UserCategory } from "@/types/registration";
import { useOTP } from "@/hooks/use-registration";

export const RegistrationOTPForm: React.FC<RegistrationOTPFormProps> = ({
  email,
  category,
  memberIdentity,
  onSuccess,
  onError,
  onResend,
  className,
}) => {
  const t = useTranslations("LandingPage");
  const { verifyOTP, resendOTP, loading, error, formattedTime, canResend } =
    useOTP();
  const [otpValue, setOtpValue] = useState("");

  const handleOTPChange = (value: string) => {
    setOtpValue(value);
  };

  const handleVerifyOTP = async () => {
    if (otpValue.length !== 6) {
      onError?.("Please enter a complete 6-digit OTP");
      return;
    }

    try {
      const userData = await verifyOTP(
        email,
        otpValue,
        category,
        memberIdentity
      );
      if (userData?.error) return false;
      onSuccess(email);
    } catch (error: any) {
      onError?.(error.message || "OTP verification failed");
    }
  };

  const handleResendOTP = async () => {
    if (!canResend) {
      onError?.("Please wait before requesting a new OTP");
      return;
    }

    try {
      const success = await resendOTP(email, category, memberIdentity);
      if (success) {
        onResend?.();
      }
    } catch (error: any) {
      onError?.(error.message || "Failed to resend OTP");
    }
  };

  const handleTypeOTP = (event: React.KeyboardEvent<HTMLInputElement>) => {
    const { key } = event;
    const target = event.currentTarget;

    if (key === "Enter") {
      event.preventDefault();
      handleVerifyOTP();
    }
  };

  return (
    <div className={className}>
      <div className="space-y-6">
        {/* OTP Instructions */}
        {/* <div className="px-8 lg:px-20 mb-6">
          <p className="text-black dark:text-white text-2xl px-0 lg:px-20 font-semibold">
            {t("enterOTP", { defaultValue: "Masukkan kode OTP" })}
          </p>
          <p className="text-red-500 text-sm px-0 lg:px-20">
            {t("checkInbox", { defaultValue: "Silahkan cek inbox atau kotak spam pada email Anda." })}
          </p>
          <p className="text-gray-600 text-sm px-0 lg:px-20 mt-2">
            OTP sent to: <span className="font-medium">{email}</span>
          </p>
        </div> */}

        {/* OTP Input */}
        <div className="flex justify-center mb-6">
          <InputOTP
            maxLength={6}
            value={otpValue}
            onChange={handleOTPChange}
            disabled={loading}
            className="gap-2"
          >
            <InputOTPGroup>
              <InputOTPSlot
                index={0}
                onKeyDown={handleTypeOTP}
                className="w-12 h-12 text-lg"
              />
              <InputOTPSlot
                index={1}
                onKeyDown={handleTypeOTP}
                className="w-12 h-12 text-lg"
              />
            </InputOTPGroup>
            <InputOTPSeparator />
            <InputOTPGroup>
              <InputOTPSlot
                index={2}
                onKeyDown={handleTypeOTP}
                className="w-12 h-12 text-lg"
              />
              <InputOTPSlot
                index={3}
                onKeyDown={handleTypeOTP}
                className="w-12 h-12 text-lg"
              />
            </InputOTPGroup>
            <InputOTPSeparator />
            <InputOTPGroup>
              <InputOTPSlot
                index={4}
                onKeyDown={handleTypeOTP}
                className="w-12 h-12 text-lg"
              />
              <InputOTPSlot
                index={5}
                onKeyDown={handleTypeOTP}
                className="w-12 h-12 text-lg"
              />
            </InputOTPGroup>
          </InputOTP>
        </div>

        {/* Error Message */}
        {error && (
          <p className="text-red-500 text-center">
            <b>{error}</b>
          </p>
        )}

        {/* Action Buttons */}
        <div className="flex flex-row px-0 lg:px-28 justify-between items-center my-4">
          <Button
            type="button"
            variant="outline"
            onClick={handleResendOTP}
            disabled={!canResend || loading}
            className="bg-slate-300 dark:bg-black text-center rounded-lg mr-1 w-[200px] py-2 text-base"
          >
            {canResend
              ? t("resend", { defaultValue: "Resend OTP" })
              : `${t("resending", {
                  defaultValue: "Resending",
                })} (${formattedTime})`}
          </Button>
          <Button
            type="button"
            onClick={handleVerifyOTP}
            disabled={otpValue.length !== 6 || loading}
            className="bg-red-700 w-[200px] py-2 text-center text-white rounded-lg ml-1 hover:bg-red-800"
          >
            {loading ? (
              <div className="flex items-center gap-2">
                <div className="w-4 h-4 border-2 border-white border-t-transparent rounded-full animate-spin" />
                Verifying...
              </div>
            ) : (
              t("next", { defaultValue: "Next" })
            )}
          </Button>
        </div>

        {/* Help Text */}
        <div className="text-center px-8">
          <p className="text-sm text-gray-600">
            {t("otpHelp", {
              defaultValue:
                "Didn't receive the code? Check your spam folder or",
            })}{" "}
            <button
              type="button"
              onClick={handleResendOTP}
              disabled={!canResend || loading}
              className="text-blue-600 hover:text-blue-800 underline disabled:opacity-50 disabled:cursor-not-allowed"
            >
              {t("resend", { defaultValue: "resend OTP" })}
            </button>
          </p>
        </div>
      </div>
    </div>
  );
};