'use client'

import { useEffect, useState } from 'react'
import Image from 'next/image'
import { Header } from '@/components/Header'
import { Footer } from '@/components/Footer'
import { DomainChecker } from '@/components/DomainChecker'
import { useStore } from '@/lib/store'
import { api } from '@/lib/api'
import { Eye, Bell, Clock, Shield, ArrowRight, Check, TrendingUp, TrendingDown, Minus, Lock, ChevronRight } from 'lucide-react'
import Link from 'next/link'
import clsx from 'clsx'

const features = [
  {
    icon: Eye,
    title: 'Always Watching',
    description: 'Daily scans. 886+ TLDs. You sleep, we hunt.',
  },
  {
    icon: Bell,
    title: 'Instant Alerts',
    description: 'Domain drops? You know first. Always.',
  },
  {
    icon: Clock,
    title: 'Expiry Intel',
    description: 'See when domains expire. Plan your move.',
  },
  {
    icon: Shield,
    title: 'Your Strategy, Private',
    description: 'No one sees your watchlist. Ever.',
  },
]

const tiers = [
  {
    name: 'Scout',
    price: '0',
    period: '',
    description: 'Test the waters. Zero risk.',
    features: ['5 domains', 'Daily checks', 'Email alerts', 'Basic search'],
    cta: 'Hunt Free',
    highlighted: false,
  },
  {
    name: 'Trader',
    price: '19',
    period: '/mo',
    description: 'Hunt with precision.',
    features: ['50 domains', 'Hourly checks', 'SMS alerts', 'Domain valuation', 'Portfolio tracking'],
    cta: 'Start Trading',
    highlighted: true,
  },
  {
    name: 'Tycoon',
    price: '49',
    period: '/mo',
    description: 'Dominate the market.',
    features: ['500 domains', 'Real-time checks', 'API access', 'SEO metrics', 'Bulk tools'],
    cta: 'Go Tycoon',
    highlighted: false,
  },
]

interface TldData {
  tld: string
  type: string
  description: string
  avg_registration_price: number
  min_registration_price: number
  max_registration_price: number
  trend: string
}

interface TrendingTld {
  tld: string
  reason: string
  current_price: number
  price_change: number  // API returns price_change, not price_change_percent
}

// Shimmer component for locked content
function ShimmerBlock({ className }: { className?: string }) {
  return (
    <div className={clsx(
      "relative overflow-hidden rounded bg-background-tertiary",
      className
    )}>
      <div className="absolute inset-0 -translate-x-full animate-[shimmer_2s_infinite] bg-gradient-to-r from-transparent via-foreground/5 to-transparent" />
    </div>
  )
}

export default function HomePage() {
  const { checkAuth, isLoading, isAuthenticated } = useStore()
  const [tldData, setTldData] = useState<TldData[]>([])
  const [trendingTlds, setTrendingTlds] = useState<TrendingTld[]>([])
  const [loadingTlds, setLoadingTlds] = useState(true)

  useEffect(() => {
    checkAuth()
    fetchTldData()
  }, [checkAuth])

  const fetchTldData = async () => {
    try {
      const [overview, trending] = await Promise.all([
        api.getTldOverview(8),
        api.getTrendingTlds()
      ])
      setTldData(overview.tlds)
      setTrendingTlds(trending.trending.slice(0, 4))
    } catch (error) {
      console.error('Failed to fetch TLD data:', error)
    } finally {
      setLoadingTlds(false)
    }
  }

  if (isLoading) {
    return (
      <div className="min-h-screen flex items-center justify-center">
        <div className="w-5 h-5 border-2 border-accent border-t-transparent rounded-full animate-spin" />
      </div>
    )
  }

  const getTrendIcon = (priceChange: number) => {
    if (priceChange > 0) return <TrendingUp className="w-3.5 h-3.5" />
    if (priceChange < 0) return <TrendingDown className="w-3.5 h-3.5" />
    return <Minus className="w-3.5 h-3.5" />
  }
  
  const getTrendDirection = (priceChange: number) => {
    if (priceChange > 0) return 'up'
    if (priceChange < 0) return 'down'
    return 'stable'
  }

  return (
    <div className="min-h-screen relative">
      {/* Ambient background glow */}
      <div className="fixed inset-0 pointer-events-none">
        <div className="absolute top-0 left-1/2 -translate-x-1/2 w-[800px] h-[600px] bg-accent/[0.03] rounded-full blur-3xl" />
      </div>
      
      <Header />
      
      {/* Hero Section */}
      <section className="relative pt-28 sm:pt-32 md:pt-36 lg:pt-40 pb-16 sm:pb-20 px-4 sm:px-6">
        <div className="max-w-7xl mx-auto text-center">
          {/* Puma Logo - Compact & Elegant */}
          <div className="flex justify-center mb-6 sm:mb-8 animate-fade-in">
            <Image
              src="/pounce-puma.png"
              alt="pounce"
              width={300}
              height={210}
              className="w-32 h-auto sm:w-40 md:w-48 object-contain drop-shadow-[0_0_40px_rgba(16,185,129,0.25)]"
              priority
            />
          </div>
          
          {/* Main Headline - RESPONSIVE */}
          <h1 className="font-display text-[2.25rem] leading-[1.1] sm:text-[3rem] md:text-[3.75rem] lg:text-[4.5rem] xl:text-[5.25rem] tracking-[-0.035em] mb-6 sm:mb-8 md:mb-10 animate-slide-up">
            <span className="block text-foreground">Others wait.</span>
            <span className="block text-foreground-muted">You pounce.</span>
          </h1>
          
          {/* Subheadline - RESPONSIVE */}
          <p className="text-body-md sm:text-body-lg md:text-body-xl text-foreground-muted max-w-xl sm:max-w-2xl mx-auto mb-10 sm:mb-12 md:mb-16 animate-slide-up delay-100 px-4 sm:px-0">
            Domain intelligence for the decisive. Track any domain. 
            Know the moment it drops. Move before anyone else.
          </p>
          
          {/* Domain Checker */}
          <div className="animate-slide-up delay-150">
            <DomainChecker />
          </div>
        </div>
      </section>

      {/* TLD Price Intelligence Section */}
      <section className="relative py-16 sm:py-20 md:py-24 px-4 sm:px-6 border-t border-border-subtle">
        <div className="max-w-7xl mx-auto">
          {/* Section Header */}
          <div className="text-center mb-10 sm:mb-12">
            <div className="inline-flex items-center gap-2 px-3 py-1.5 bg-accent-muted border border-accent/20 rounded-full mb-5">
              <TrendingUp className="w-4 h-4 text-accent" />
              <span className="text-ui-sm text-accent">Market Intel</span>
            </div>
            <h2 className="font-display text-[1.75rem] sm:text-[2.5rem] md:text-[3.25rem] lg:text-[4rem] leading-[1.1] tracking-[-0.03em] text-foreground mb-4 sm:mb-5 md:mb-6">
              886 TLDs. Tracked Daily.
            </h2>
            <p className="text-body-sm sm:text-body text-foreground-muted max-w-lg mx-auto">
              See price movements. Spot opportunities. Act fast.
            </p>
          </div>

          {/* Trending TLDs - Card Grid */}
          <div className="mb-8">
            <div className="flex items-center gap-2 mb-4">
              <TrendingUp className="w-4 h-4 text-accent" />
              <span className="text-ui font-medium text-foreground">Trending Now</span>
            </div>
            
            {loadingTlds ? (
              <div className="grid grid-cols-2 lg:grid-cols-4 gap-4">
                {[...Array(4)].map((_, i) => (
                  <div key={i} className="p-5 bg-background-secondary border border-border rounded-xl">
                    <ShimmerBlock className="h-6 w-16 mb-3" />
                    <ShimmerBlock className="h-4 w-full mb-2" />
                    <ShimmerBlock className="h-4 w-20" />
                  </div>
                ))}
              </div>
            ) : (
              <div className="grid grid-cols-2 lg:grid-cols-4 gap-4">
                {trendingTlds.map((item) => (
                  <Link
                    key={item.tld}
                    href={isAuthenticated ? `/tld-pricing/${item.tld}` : '/register'}
                    className="group p-5 bg-background-secondary border border-border rounded-xl
                               hover:border-border-hover transition-all duration-300"
                  >
                    <div className="flex items-center justify-between mb-3">
                      <span className="font-mono text-body-lg sm:text-heading-sm text-foreground">.{item.tld}</span>
                      <span className={clsx(
                        "flex items-center gap-1 text-ui-sm font-medium px-2 py-0.5 rounded-full",
                        (item.price_change ?? 0) > 0 
                          ? "text-[#f97316] bg-[#f9731615]"
                          : (item.price_change ?? 0) < 0
                            ? "text-accent bg-accent-muted"
                            : "text-foreground-muted bg-background-tertiary"
                      )}>
                        {getTrendIcon(item.price_change ?? 0)}
                        {(item.price_change ?? 0) > 0 ? '+' : ''}{(item.price_change ?? 0).toFixed(1)}%
                      </span>
                    </div>
                    
                    <p className="text-body-xs text-foreground-subtle mb-3 line-clamp-2">{item.reason}</p>
                    
                    <div className="flex items-center justify-between">
                      {isAuthenticated ? (
                        <span className="text-body-sm text-foreground">${(item.current_price ?? 0).toFixed(2)}/yr</span>
                      ) : (
                        <ShimmerBlock className="h-5 w-20" />
                      )}
                      <ChevronRight className="w-4 h-4 text-foreground-subtle group-hover:text-accent transition-colors" />
                    </div>
                  </Link>
                ))}
              </div>
            )}
          </div>

          {/* Login CTA for non-authenticated users */}
          {!isAuthenticated && (
            <div className="p-5 bg-background-secondary/50 border border-border rounded-xl flex flex-col sm:flex-row items-center justify-between gap-4">
              <div className="flex items-center gap-3">
                <div className="w-10 h-10 bg-accent-muted rounded-xl flex items-center justify-center">
                  <Lock className="w-4 h-4 text-accent" />
                </div>
                <div>
                  <p className="text-body-sm font-medium text-foreground">Unlock Full Data</p>
                  <p className="text-ui-sm text-foreground-subtle">
                    Sign in for prices, trends, and registrar comparisons.
                  </p>
                </div>
              </div>
              <Link
                href="/register"
                className="shrink-0 px-5 py-2.5 bg-accent text-background text-ui font-medium rounded-lg
                           hover:bg-accent-hover transition-all duration-300"
              >
                Get Started Free
              </Link>
            </div>
          )}

          {/* View All Link */}
          <div className="mt-6 text-center">
            <Link 
              href="/tld-pricing"
              className="inline-flex items-center gap-2 text-body-sm font-medium text-accent hover:text-accent-hover transition-colors"
            >
              Explore All TLDs
              <ArrowRight className="w-4 h-4" />
            </Link>
          </div>
        </div>
      </section>

      {/* Features Section */}
      <section className="relative py-20 sm:py-24 md:py-32 px-4 sm:px-6">
        <div className="max-w-7xl mx-auto">
          <div className="text-center mb-12 sm:mb-16 md:mb-20">
            <p className="label sm:label-md text-accent mb-3 sm:mb-4 md:mb-5">How It Works</p>
            <h2 className="font-display text-[1.75rem] sm:text-[2.5rem] md:text-[3.25rem] lg:text-[4rem] leading-[1.1] tracking-[-0.03em] text-foreground mb-4 sm:mb-5 md:mb-6">
              Built for hunters.
            </h2>
            <p className="text-body-sm sm:text-body md:text-body-lg text-foreground-muted max-w-md sm:max-w-lg mx-auto px-4 sm:px-0">
              The tools that give you the edge. Simple. Powerful. Decisive.
            </p>
          </div>
          
          <div className="grid sm:grid-cols-2 lg:grid-cols-4 gap-4 sm:gap-5 md:gap-6">
            {features.map((feature, i) => (
              <div
                key={feature.title}
                className="group p-5 sm:p-6 rounded-2xl border border-transparent hover:border-border hover:bg-background-secondary/50 transition-all duration-500"
                style={{ animationDelay: `${i * 100}ms` }}
              >
                <div className="w-10 sm:w-11 h-10 sm:h-11 bg-background-secondary border border-border rounded-xl flex items-center justify-center mb-4 sm:mb-5
                              group-hover:border-accent/30 group-hover:bg-accent/5 transition-all duration-500">
                  <feature.icon className="w-4 sm:w-5 h-4 sm:h-5 text-foreground-muted group-hover:text-accent transition-colors duration-500" strokeWidth={1.5} />
                </div>
                <h3 className="text-body sm:text-body-md font-medium text-foreground mb-2">{feature.title}</h3>
                <p className="text-body-xs sm:text-body-sm text-foreground-subtle leading-relaxed">{feature.description}</p>
              </div>
            ))}
          </div>
        </div>
      </section>

      {/* Pricing Section */}
      <section className="relative py-20 sm:py-24 md:py-32 px-4 sm:px-6">
        {/* Section glow */}
        <div className="absolute inset-0 pointer-events-none overflow-hidden">
          <div className="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 w-[600px] h-[400px] bg-accent/[0.02] rounded-full blur-3xl" />
        </div>
        
        <div className="relative max-w-5xl mx-auto">
          <div className="text-center mb-12 sm:mb-16 md:mb-20">
            <p className="label sm:label-md text-accent mb-3 sm:mb-4 md:mb-5">Pricing</p>
            <h2 className="font-display text-[1.75rem] sm:text-[2.5rem] md:text-[3.25rem] lg:text-[4rem] leading-[1.1] tracking-[-0.03em] text-foreground mb-4 sm:mb-5 md:mb-6">
              Pick your weapon.
            </h2>
            <p className="text-body-sm sm:text-body md:text-body-lg text-foreground-muted">
              Start free. Scale when you&apos;re ready.
            </p>
          </div>
          
          <div className="grid sm:grid-cols-2 md:grid-cols-3 gap-4 sm:gap-5">
            {tiers.map((tier, i) => (
              <div
                key={tier.name}
                className={`relative p-5 sm:p-6 md:p-7 rounded-2xl border transition-all duration-500 ${
                  tier.highlighted 
                    ? 'bg-background-secondary border-accent/20 glow-accent' 
                    : 'bg-background-secondary/50 border-border hover:border-border-hover'
                }`}
                style={{ animationDelay: `${i * 100}ms` }}
              >
                {tier.highlighted && (
                  <div className="absolute -top-3 left-1/2 -translate-x-1/2">
                    <span className="px-3 py-1 bg-accent text-background text-ui-xs sm:text-ui-sm font-medium rounded-full">
                      Popular
                    </span>
                  </div>
                )}
                
                <div className="mb-5 sm:mb-6">
                  <h3 className="text-body sm:text-body-md font-medium text-foreground mb-1">{tier.name}</h3>
                  <p className="text-ui-sm sm:text-ui text-foreground-subtle mb-4 sm:mb-5">{tier.description}</p>
                  <div className="flex items-baseline gap-1">
                    {tier.price === '0' ? (
                      <span className="text-heading-md sm:text-heading-lg font-display text-foreground">Free</span>
                    ) : (
                      <>
                        <span className="text-heading-md sm:text-heading-lg font-display text-foreground">${tier.price}</span>
                        <span className="text-body-sm text-foreground-subtle">{tier.period}</span>
                      </>
                    )}
                  </div>
                </div>
                
                <ul className="space-y-2.5 sm:space-y-3 mb-6 sm:mb-8">
                  {tier.features.map((feature) => (
                    <li key={feature} className="flex items-center gap-2.5 sm:gap-3 text-body-xs sm:text-body-sm">
                      <Check className="w-3.5 sm:w-4 h-3.5 sm:h-4 text-accent shrink-0" strokeWidth={2.5} />
                      <span className="text-foreground-muted">{feature}</span>
                    </li>
                  ))}
                </ul>
                
                <Link
                  href={isAuthenticated ? '/dashboard' : '/register'}
                  className={`w-full flex items-center justify-center gap-2 py-2.5 sm:py-3 rounded-xl text-ui-sm sm:text-ui font-medium transition-all duration-300 ${
                    tier.highlighted
                      ? 'bg-accent text-background hover:bg-accent-hover'
                      : 'bg-background-tertiary text-foreground border border-border hover:border-border-hover'
                  }`}
                >
                  {tier.cta}
                </Link>
              </div>
            ))}
          </div>
        </div>
      </section>

      {/* CTA Section */}
      <section className="relative py-20 sm:py-24 md:py-32 px-4 sm:px-6">
        <div className="max-w-2xl mx-auto text-center">
          <h2 className="font-display text-[1.75rem] sm:text-[2.5rem] md:text-[3.25rem] lg:text-[4rem] leading-[1.1] tracking-[-0.03em] text-foreground mb-4 sm:mb-5 md:mb-6">
            Start monitoring today
          </h2>
          <p className="text-body-md sm:text-body-lg md:text-body-xl text-foreground-muted mb-8 sm:mb-10">
            Create a free account and track up to 3 domains. 
            No credit card required.
          </p>
          <Link 
            href="/register" 
            className="btn-primary inline-flex items-center gap-2 sm:gap-2.5 px-6 sm:px-8 py-3 sm:py-4 text-body-sm sm:text-body"
          >
            Get Started Free
            <ArrowRight className="w-4 h-4" />
          </Link>
        </div>
      </section>

      <Footer />
    </div>
  )
}