'use client';

import { useState, useEffect } from 'react';
import { motion, AnimatePresence } from 'framer-motion';
import { useRouter } from 'next/navigation';
import Link from 'next/link';
import { Home, Search, Rocket, ArrowLeft, ArrowRight } from 'lucide-react';
import { useTranslation } from 'react-i18next';

const STORAGE_KEY = 'sweethome_onboarding_completed';

export default function OnboardingPage() {
  const { t, i18n } = useTranslation();
  const router = useRouter();
  const [currentStep, setCurrentStep] = useState(0);

  const steps = [
    {
      icon: Home,
      title: t('onboarding.step1.title'),
      description: t('onboarding.step1.description'),
      gradient: 'from-amber-500 to-orange-600',
    },
    {
      icon: Search,
      title: t('onboarding.step2.title'),
      description: t('onboarding.step2.description'),
      gradient: 'from-blue-500 to-indigo-600',
    },
    {
      icon: Rocket,
      title: t('onboarding.step3.title'),
      description: t('onboarding.step3.description'),
      gradient: 'from-emerald-500 to-teal-600',
    },
  ];
  const [direction, setDirection] = useState(0);

  useEffect(() => {
    const completed = localStorage.getItem(STORAGE_KEY);
    if (completed === 'true') {
      router.replace('/');
    }
  }, [router]);

  const goToStep = (index) => {
    setDirection(index > currentStep ? 1 : -1);
    setCurrentStep(index);
  };

  const nextStep = () => {
    if (currentStep < steps.length - 1) {
      goToStep(currentStep + 1);
    }
  };

  const prevStep = () => {
    if (currentStep > 0) {
      goToStep(currentStep - 1);
    }
  };

  const handleFinish = () => {
    localStorage.setItem(STORAGE_KEY, 'true');
  };

  const step = steps[currentStep];
  const isLastStep = currentStep === steps.length - 1;
  const isFirstStep = currentStep === 0;
  const IconComponent = step.icon;

  const slideVariants = {
    enter: (dir) => ({ x: dir > 0 ? 300 : -300, opacity: 0 }),
    center: { x: 0, opacity: 1 },
    exit: (dir) => ({ x: dir > 0 ? -300 : 300, opacity: 0 }),
  };

  return (
    <div dir={i18n.language === 'ar' ? 'rtl' : 'ltr'} className="min-h-screen bg-gradient-to-br from-gray-950 via-gray-900 to-gray-950 flex items-center justify-center p-4 relative overflow-hidden">
      <div className="absolute inset-0 overflow-hidden">
        {[...Array(30)].map((_, i) => (
          <motion.div
            key={i}
            className="absolute rounded-full bg-white/5"
            style={{
              left: `${Math.random() * 100}%`,
              top: `${Math.random() * 100}%`,
              width: Math.random() * 6 + 2,
              height: Math.random() * 6 + 2,
            }}
            animate={{
              y: [0, -30, 0],
              opacity: [0.1, 0.4, 0.1],
            }}
            transition={{
              duration: Math.random() * 8 + 6,
              repeat: Infinity,
              delay: Math.random() * 4,
              ease: 'easeInOut',
            }}
          />
        ))}
      </div>

      <motion.div
        className={`absolute top-1/4 -left-20 w-72 h-72 bg-${step.gradient.split(' ')[0].replace('from-', '')}/10 rounded-full blur-3xl`}
        animate={{ scale: [1, 1.3, 1], x: [0, 40, 0] }}
        transition={{ duration: 10, repeat: Infinity }}
      />
      <motion.div
        className={`absolute bottom-1/4 -right-20 w-80 h-80 bg-${step.gradient.split(' ')[1]}/10 rounded-full blur-3xl`}
        animate={{ scale: [1, 1.2, 1], x: [0, -30, 0] }}
        transition={{ duration: 12, repeat: Infinity }}
      />

      <div className="relative w-full max-w-lg z-10">
        <div className="bg-white/10 backdrop-blur-2xl rounded-3xl shadow-2xl border border-white/10 overflow-hidden">
          <AnimatePresence mode="wait" custom={direction}>
            <motion.div
              key={currentStep}
              custom={direction}
              variants={slideVariants}
              initial="enter"
              animate="center"
              exit="exit"
              transition={{ type: 'spring', stiffness: 300, damping: 30 }}
              className="p-10"
            >
              <div className={`bg-gradient-to-br ${step.gradient} rounded-2xl p-8 text-center mb-8 relative overflow-hidden`}>
                <motion.div
                  className="absolute -top-12 -right-12 w-32 h-32 bg-white/10 rounded-full"
                  animate={{ scale: [1, 1.2, 1] }}
                  transition={{ duration: 4, repeat: Infinity }}
                />
                <motion.div
                  className="absolute -bottom-8 -left-8 w-24 h-24 bg-white/10 rounded-full"
                  animate={{ scale: [1, 1.3, 1] }}
                  transition={{ duration: 5, repeat: Infinity }}
                />
                <div className="relative z-10">
                  <motion.div
                    initial={{ scale: 0, rotate: -180 }}
                    animate={{ scale: 1, rotate: 0 }}
                    transition={{ type: 'spring', stiffness: 200, delay: 0.1 }}
                    className="w-24 h-24 mx-auto bg-white/20 rounded-3xl flex items-center justify-center backdrop-blur-sm"
                  >
                    <IconComponent className="w-12 h-12 text-white" />
                  </motion.div>
                </div>
              </div>

              <div className="text-center mb-8">
                <motion.h1
                  initial={{ opacity: 0, y: 20 }}
                  animate={{ opacity: 1, y: 0 }}
                  transition={{ delay: 0.15 }}
                  className="text-3xl font-bold text-white mb-4"
                >
                  {step.title}
                </motion.h1>
                <motion.p
                  initial={{ opacity: 0, y: 20 }}
                  animate={{ opacity: 1, y: 0 }}
                  transition={{ delay: 0.25 }}
                  className="text-gray-300 leading-relaxed text-base"
                >
                  {step.description}
                </motion.p>
              </div>

              <motion.div
                initial={{ opacity: 0 }}
                animate={{ opacity: 1 }}
                transition={{ delay: 0.35 }}
                className="flex items-center justify-center gap-2 mb-8"
              >
                {steps.map((_, index) => (
                  <button
                    key={index}
                    onClick={() => goToStep(index)}
                    className={`rounded-full transition-all duration-300 ${
                      index === currentStep
                        ? 'w-8 h-3 bg-gradient-to-r ' + step.gradient
                        : 'w-3 h-3 bg-white/20 hover:bg-white/40'
                    }`}
                  />
                ))}
              </motion.div>

              <motion.div
                initial={{ opacity: 0, y: 10 }}
                animate={{ opacity: 1, y: 0 }}
                transition={{ delay: 0.4 }}
                className="flex items-center justify-between gap-4"
              >
                {!isFirstStep ? (
                  <motion.button
                    whileHover={{ scale: 1.05 }}
                    whileTap={{ scale: 0.95 }}
                    onClick={prevStep}
                    className="flex items-center gap-2 px-5 py-3 rounded-xl text-gray-300 hover:text-white hover:bg-white/10 transition-all border border-white/10"
                  >
                    <ArrowRight className="w-5 h-5" />
                    <span>{t('onboarding.prev')}</span>
                  </motion.button>
                ) : (
                  <div />
                )}

                {!isLastStep ? (
                  <motion.button
                    whileHover={{ scale: 1.05 }}
                    whileTap={{ scale: 0.95 }}
                    onClick={nextStep}
                    className={`flex items-center gap-2 px-6 py-3 rounded-xl text-white font-medium bg-gradient-to-r ${step.gradient} hover:shadow-lg transition-all`}
                  >
                    <span>{t('onboarding.next')}</span>
                    <ArrowLeft className="w-5 h-5" />
                  </motion.button>
                ) : (
                  <div className="flex gap-3">
                    <Link href="/auth/choose-role" onClick={handleFinish}>
                      <motion.button
                        whileHover={{ scale: 1.05 }}
                        whileTap={{ scale: 0.95 }}
                        className="px-6 py-3 rounded-xl bg-white text-gray-900 font-bold hover:bg-gray-100 transition-all"
                      >
                        {t('onboarding.register')}
                      </motion.button>
                    </Link>
                    <Link href="/login" onClick={handleFinish}>
                      <motion.button
                        whileHover={{ scale: 1.05 }}
                        whileTap={{ scale: 0.95 }}
                        className="px-6 py-3 rounded-xl bg-gradient-to-r from-emerald-500 to-teal-600 text-white font-bold hover:shadow-lg transition-all"
                      >
                        {t('onboarding.login')}
                      </motion.button>
                    </Link>
                  </div>
                )}
              </motion.div>
            </motion.div>
          </AnimatePresence>
        </div>

        <motion.p
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          transition={{ delay: 0.8 }}
          className="text-center text-gray-500 text-xs mt-4"
        >
          {currentStep + 1} / {steps.length}
        </motion.p>
      </div>
    </div>
  );
}