'use client';

import React, { useState, useEffect } from 'react';
import { usePathname } from 'next/navigation';
import { motion, AnimatePresence } from 'framer-motion';
import { Scan, GlassWater, Users, Settings, ArrowRight, X, Sparkles } from 'lucide-react';
import { useI18n } from '@/i18n/I18nContext';
import { useAuth } from '@/context/AuthContext';

const ONBOARDING_KEY = 'dramlog_onboarding_complete';

interface OnboardingStep {
    id: string;
    icon: React.ReactNode;
    title: string;
    description: string;
}

const getSteps = (t: (path: string) => string): OnboardingStep[] => [
    {
        id: 'welcome',
        icon: <Sparkles size={32} className="text-orange-500" />,
        title: t('tutorial.steps.welcome.title'),
        description: t('tutorial.steps.welcome.desc'),
    },
    {
        id: 'scan',
        icon: <Scan size={32} className="text-orange-500" />,
        title: t('tutorial.steps.scan.title'),
        description: t('tutorial.steps.scan.desc'),
    },
    {
        id: 'taste',
        icon: <GlassWater size={32} className="text-orange-500" />,
        title: t('tutorial.steps.taste.title'),
        description: t('tutorial.steps.taste.desc'),
    },
    {
        id: 'activity',
        icon: <Users size={32} className="text-orange-500" />,
        title: t('tutorial.steps.activity.title'),
        description: t('tutorial.steps.activity.desc'),
    },
    {
        id: 'ready',
        icon: <Settings size={32} className="text-orange-500" />,
        title: t('tutorial.steps.ready.title'),
        description: t('tutorial.steps.ready.desc'),
    },
];

export default function OnboardingTutorial() {
    const { t } = useI18n();
    const { user, isLoading } = useAuth();
    const STEPS = getSteps(t);
    const [isOpen, setIsOpen] = useState(false);
    const [currentStep, setCurrentStep] = useState(0);
    const pathname = usePathname();

    useEffect(() => {
        // Don't show if auth is still loading
        if (isLoading) return;

        // Don't show if no user is logged in
        if (!user) {
            setIsOpen(false);
            return;
        }

        // Don't show on login/auth pages
        if (pathname === '/login' || pathname === '/auth' || pathname === '/register') {
            return;
        }

        // Check if onboarding was completed
        const completed = localStorage.getItem(ONBOARDING_KEY);
        if (!completed) {
            // Small delay to not overwhelm on first load
            const timer = setTimeout(() => setIsOpen(true), 1000);
            return () => clearTimeout(timer);
        }
    }, [pathname]);

    const handleNext = () => {
        if (currentStep < STEPS.length - 1) {
            setCurrentStep(prev => prev + 1);
        } else {
            handleComplete();
        }
    };

    const handleComplete = () => {
        localStorage.setItem(ONBOARDING_KEY, 'true');
        setIsOpen(false);
    };

    const handleSkip = () => {
        localStorage.setItem(ONBOARDING_KEY, 'true');
        setIsOpen(false);
    };

    if (!isOpen) return null;

    const step = STEPS[currentStep];
    const isLastStep = currentStep === STEPS.length - 1;

    return (
        <AnimatePresence>
            <motion.div
                initial={{ opacity: 0 }}
                animate={{ opacity: 1 }}
                exit={{ opacity: 0 }}
                className="fixed inset-0 z-200 bg-black/90 backdrop-blur-xs flex items-center justify-center p-6"
            >
                {/* Close button */}
                <button
                    onClick={handleSkip}
                    className="absolute top-6 right-6 p-2 text-zinc-500 hover:text-white transition-colors"
                >
                    <X size={24} />
                </button>

                <motion.div
                    key={step.id}
                    initial={{ opacity: 0, y: 20 }}
                    animate={{ opacity: 1, y: 0 }}
                    exit={{ opacity: 0, y: -20 }}
                    className="max-w-sm w-full"
                >
                    {/* Icon */}
                    <div className="w-20 h-20 mx-auto rounded-3xl bg-zinc-900 border border-zinc-800 flex items-center justify-center mb-8">
                        {step.icon}
                    </div>

                    {/* Content */}
                    <h2 className="text-2xl font-bold text-white text-center mb-3">
                        {step.title}
                    </h2>
                    <p className="text-zinc-400 text-center text-sm leading-relaxed mb-8">
                        {step.description}
                    </p>

                    {/* Progress dots */}
                    <div className="flex justify-center gap-2 mb-8">
                        {STEPS.map((_, index) => (
                            <div
                                key={index}
                                className={`w-2 h-2 rounded-full transition-all ${index === currentStep
                                    ? 'w-6 bg-orange-500'
                                    : index < currentStep
                                        ? 'bg-orange-500/50'
                                        : 'bg-zinc-700'
                                    }`}
                            />
                        ))}
                    </div>

                    {/* Buttons */}
                    <div className="flex gap-3">
                        {!isLastStep && (
                            <button
                                onClick={handleSkip}
                                className="flex-1 py-3 px-4 text-sm font-bold text-zinc-500 hover:text-white transition-colors"
                            >
                                {t('tutorial.skip')}
                            </button>
                        )}
                        <button
                            onClick={handleNext}
                            className="flex-1 py-3 px-4 bg-orange-600 hover:bg-orange-500 text-white font-bold text-sm rounded-xl flex items-center justify-center gap-2 transition-colors"
                        >
                            {isLastStep ? t('tutorial.finish') : t('tutorial.next')}
                            <ArrowRight size={16} />
                        </button>
                    </div>
                </motion.div>
            </motion.div>
        </AnimatePresence>
    );
}