"use client";

import { useState, useEffect } from "react";
import { useRouter } from "next/navigation";
import Link from "next/link";
import { motion } from "framer-motion";
import { useTranslation } from "react-i18next";
import { Mail, Phone, Shield, ChevronLeft, Loader2, CheckCircle, XCircle, Send, Key } from "lucide-react";
import toast, { Toaster } from "react-hot-toast";
import AuthService from "../services/AuthService";
import { sendEmailOTP, sendPhoneOTP, verifyEmail, verifyPhone } from "../utils/api";
import InteractiveBackground from "../components/Animation/Background";

export default function AccountVerificationPage() {
  const router = useRouter();
  const { t } = useTranslation();
  const [user, setUser] = useState(null);
  const [isLoading, setIsLoading] = useState(true);

  const [emailCode, setEmailCode] = useState("");
  const [phoneCode, setPhoneCode] = useState("");
  const [sendingEmailOTP, setSendingEmailOTP] = useState(false);
  const [sendingPhoneOTP, setSendingPhoneOTP] = useState(false);
  const [verifyingEmail, setVerifyingEmail] = useState(false);
  const [verifyingPhone, setVerifyingPhone] = useState(false);
  const [emailVerified, setEmailVerified] = useState(false);
  const [phoneVerified, setPhoneVerified] = useState(false);
  const [showEmailInput, setShowEmailInput] = useState(false);
  const [showPhoneInput, setShowPhoneInput] = useState(false);

  useEffect(() => {
    const authUser = AuthService.getUser();
    if (authUser) {
      setUser(authUser);
      setIsLoading(false);
    } else {
      router.push("/login");
    }
  }, [router]);

  const handleSendEmailOTP = async () => {
    setSendingEmailOTP(true);
    try {
      await sendEmailOTP();
      toast.success(t("accountVerification.emailOtpSent"));
      setShowEmailInput(true);
    } catch (err) {
      toast.error(err.message || t("accountVerification.otpSendFailed"));
    } finally {
      setSendingEmailOTP(false);
    }
  };

  const handleVerifyEmail = async () => {
    if (!emailCode.trim()) {
      toast.error(t("accountVerification.otpRequired"));
      return;
    }
    setVerifyingEmail(true);
    try {
      await verifyEmail(emailCode.trim());
      setEmailVerified(true);
      setShowEmailInput(false);
      toast.success(t("accountVerification.emailVerifiedSuccess"));
    } catch (err) {
      toast.error(err.message || t("accountVerification.otpInvalid"));
    } finally {
      setVerifyingEmail(false);
    }
  };

  const handleSendPhoneOTP = async () => {
    setSendingPhoneOTP(true);
    try {
      await sendPhoneOTP();
      toast.success(t("accountVerification.phoneOtpSent"));
      setShowPhoneInput(true);
    } catch (err) {
      toast.error(err.message || t("accountVerification.otpSendFailed"));
    } finally {
      setSendingPhoneOTP(false);
    }
  };

  const handleVerifyPhone = async () => {
    if (!phoneCode.trim()) {
      toast.error(t("accountVerification.otpRequired"));
      return;
    }
    setVerifyingPhone(true);
    try {
      await verifyPhone(phoneCode.trim());
      setPhoneVerified(true);
      setShowPhoneInput(false);
      toast.success(t("accountVerification.phoneVerifiedSuccess"));
    } catch (err) {
      toast.error(err.message || t("accountVerification.otpInvalid"));
    } finally {
      setVerifyingPhone(false);
    }
  };

  const containerVariants = {
    hidden: { opacity: 0 },
    visible: {
      opacity: 1,
      transition: { staggerChildren: 0.1 },
    },
  };

  const itemVariants = {
    hidden: { opacity: 0, y: 20 },
    visible: { opacity: 1, y: 0 },
  };

  return (
    <div className="min-h-screen   py-8" dir="rtl">
      <Toaster position="top-center" reverseOrder={false} />
      <InteractiveBackground />
      <div className="relative z-10 container mx-auto px-4 max-w-2xl">
        <motion.div initial={{ opacity: 0, y: -20 }} animate={{ opacity: 1, y: 0 }} className="flex items-center gap-3 mb-8">
          <Link href="/settings" className="p-2 rounded-xl hover:bg-gray-200 transition-colors text-gray-600">
            <ChevronLeft className="w-5 h-5" />
          </Link>
          <h1 className="text-2xl font-bold text-gray-900">{t("accountVerification.title")}</h1>
        </motion.div>

        <motion.div variants={containerVariants} initial="hidden" animate="visible" className="space-y-6">
          <motion.div variants={itemVariants} className="bg-white rounded-2xl shadow-sm overflow-hidden">
            <div className="px-6 py-4 border-b border-gray-100 flex items-center gap-3">
              <Mail className="w-5 h-5 text-amber-600" />
              <h2 className="text-lg font-semibold text-gray-800">{t("accountVerification.emailSection")}</h2>
              {emailVerified && (
                <span className="flex items-center gap-1 text-xs text-green-600 bg-green-50 px-2 py-0.5 rounded-full">
                  <CheckCircle className="w-3 h-3" />
                  {t("accountVerification.verified")}
                </span>
              )}
            </div>
            <div className="p-6">
              <div className="flex items-center justify-between mb-4">
                <div>
                  <p className="text-sm text-gray-600">{user?.email || t("accountVerification.emailNotRegistered")}</p>
                  <p className="text-xs text-gray-400 mt-1">{emailVerified ? t("accountVerification.emailVerifiedDesc") : t("accountVerification.emailVerifyDesc")}</p>
                </div>
                {!emailVerified && !showEmailInput && (
                  <button
                    onClick={handleSendEmailOTP}
                    disabled={sendingEmailOTP}
                    className="flex items-center gap-2 px-4 py-2 bg-amber-500 text-white rounded-xl hover:bg-amber-600 transition-colors text-sm disabled:opacity-50"
                  >
                    {sendingEmailOTP ? <Loader2 className="w-4 h-4 animate-spin" /> : <Send className="w-4 h-4" />}
                    {sendingEmailOTP ? t("accountVerification.sending") : t("accountVerification.sendOtp")}
                  </button>
                )}
              </div>

              {showEmailInput && (
                <motion.div initial={{ opacity: 0, height: 0 }} animate={{ opacity: 1, height: "auto" }} className="space-y-3">
                  <p className="text-xs text-gray-500">{t("accountVerification.enter6DigitCode")}</p>
                  <div className="flex gap-2">
                    <input
                      type="text"
                      value={emailCode}
                      onChange={(e) => setEmailCode(e.target.value)}
                      placeholder={t("accountVerification.otpPlaceholder")}
                      maxLength={6}
                      className="flex-1 px-4 py-3 border border-gray-300 rounded-xl focus:ring-2 focus:ring-amber-500 focus:border-transparent outline-none text-center text-lg tracking-widest"
                    />
                    <button
                      onClick={handleVerifyEmail}
                      disabled={verifyingEmail}
                      className="px-6 py-3 bg-green-500 text-white rounded-xl hover:bg-green-600 transition-colors text-sm font-medium disabled:opacity-50 flex items-center gap-2"
                    >
                      {verifyingEmail ? <Loader2 className="w-4 h-4 animate-spin" /> : <Key className="w-4 h-4" />}
                      {t("accountVerification.verify")}
                    </button>
                  </div>
                  <button onClick={handleSendEmailOTP} disabled={sendingEmailOTP} className="text-xs text-amber-600 hover:text-amber-700">
                    {t("accountVerification.resendCode")}
                  </button>
                </motion.div>
              )}

              {emailVerified && (
                <div className="flex items-center gap-2 text-green-600 bg-green-50 px-4 py-3 rounded-xl">
                  <CheckCircle className="w-5 h-5" />
                  <span className="text-sm font-medium">{t("accountVerification.emailVerifiedSuccess")}</span>
                </div>
              )}
            </div>
          </motion.div>

          <motion.div variants={itemVariants} className="bg-white rounded-2xl shadow-sm overflow-hidden">
            <div className="px-6 py-4 border-b border-gray-100 flex items-center gap-3">
              <Phone className="w-5 h-5 text-amber-600" />
              <h2 className="text-lg font-semibold text-gray-800">{t("accountVerification.phoneSection")}</h2>
              {phoneVerified && (
                <span className="flex items-center gap-1 text-xs text-green-600 bg-green-50 px-2 py-0.5 rounded-full">
                  <CheckCircle className="w-3 h-3" />
                  {t("accountVerification.verified")}
                </span>
              )}
            </div>
            <div className="p-6">
              <div className="flex items-center justify-between mb-4">
                <div>
                  <p className="text-sm text-gray-600">{user?.phone || t("accountVerification.phoneNotRegistered")}</p>
                  <p className="text-xs text-gray-400 mt-1">{phoneVerified ? t("accountVerification.phoneVerifiedDesc") : t("accountVerification.phoneVerifyDesc")}</p>
                </div>
                {!phoneVerified && !showPhoneInput && (
                  <button
                    onClick={handleSendPhoneOTP}
                    disabled={sendingPhoneOTP}
                    className="flex items-center gap-2 px-4 py-2 bg-amber-500 text-white rounded-xl hover:bg-amber-600 transition-colors text-sm disabled:opacity-50"
                  >
                    {sendingPhoneOTP ? <Loader2 className="w-4 h-4 animate-spin" /> : <Send className="w-4 h-4" />}
                    {sendingPhoneOTP ? t("accountVerification.sending") : t("accountVerification.sendOtp")}
                  </button>
                )}
              </div>

              {showPhoneInput && (
                <motion.div initial={{ opacity: 0, height: 0 }} animate={{ opacity: 1, height: "auto" }} className="space-y-3">
                  <p className="text-xs text-gray-500">{t("accountVerification.enter6DigitCodePhone")}</p>
                  <div className="flex gap-2">
                    <input
                      type="text"
                      value={phoneCode}
                      onChange={(e) => setPhoneCode(e.target.value)}
                      placeholder={t("accountVerification.otpPlaceholder")}
                      maxLength={6}
                      className="flex-1 px-4 py-3 border border-gray-300 rounded-xl focus:ring-2 focus:ring-amber-500 focus:border-transparent outline-none text-center text-lg tracking-widest"
                    />
                    <button
                      onClick={handleVerifyPhone}
                      disabled={verifyingPhone}
                      className="px-6 py-3 bg-green-500 text-white rounded-xl hover:bg-green-600 transition-colors text-sm font-medium disabled:opacity-50 flex items-center gap-2"
                    >
                      {verifyingPhone ? <Loader2 className="w-4 h-4 animate-spin" /> : <Key className="w-4 h-4" />}
                      {t("accountVerification.verify")}
                    </button>
                  </div>
                  <button onClick={handleSendPhoneOTP} disabled={sendingPhoneOTP} className="text-xs text-amber-600 hover:text-amber-700">
                    {t("accountVerification.resendCode")}
                  </button>
                </motion.div>
              )}

              {phoneVerified && (
                <div className="flex items-center gap-2 text-green-600 bg-green-50 px-4 py-3 rounded-xl">
                  <CheckCircle className="w-5 h-5" />
                  <span className="text-sm font-medium">{t("accountVerification.phoneVerifiedSuccess")}</span>
                </div>
              )}
            </div>
          </motion.div>

          <motion.div variants={itemVariants} className="bg-gradient-to-br from-amber-500 to-amber-600 rounded-2xl p-6 text-white">
            <div className="flex items-center gap-3 mb-3">
              <Shield className="w-6 h-6" />
              <h3 className="text-lg font-semibold">{t("accountVerification.whyVerify")}</h3>
            </div>
            <ul className="space-y-2 text-sm " style={{ color: "#0f172a", fontWeight: "400" }}>
              <li className="flex items-center gap-2">
                <CheckCircle className="w-4 h-4 flex-shrink-0" />
                {t("accountVerification.reason1")}
              </li>
              <li className="flex items-center gap-2">
                <CheckCircle className="w-4 h-4 flex-shrink-0" />
                {t("accountVerification.reason2")}
              </li>
              <li className="flex items-center gap-2">
                <CheckCircle className="w-4 h-4 flex-shrink-0" />
                {t("accountVerification.reason3")}
              </li>
            </ul>
          </motion.div>
        </motion.div>
      </div>
    </div>
  );
}