import { useState, useEffect } from 'react';
import { useRouter } from 'next/router';
import Link from 'next/link';
import { useAuth } from '../lib/use-auth.js';
import AnimatedFireLogo from '../components/AnimatedFireLogo';

export default function Home() {
  const { user, loading } = useAuth();
  const router = useRouter();
  const [featuredCollections, setFeaturedCollections] = useState([]);
  const [collectionsLoading, setCollectionsLoading] = useState(true);

  // If user is logged in, redirect to dashboard
  useEffect(() => {
    if (!loading && user) {
      router.push('/dashboard');
    }
  }, [user, loading, router]);

  // Fetch featured collections for public display
  useEffect(() => {
    const fetchFeaturedCollections = async () => {
      try {
        const response = await fetch('/api/public/collections?limit=6');
        if (response.ok) {
          const collections = await response.json();
          setFeaturedCollections(collections);
        }
      } catch (error) {
        console.error('Error fetching featured collections:', error);
      } finally {
        setCollectionsLoading(false);
      }
    };

    fetchFeaturedCollections();
  }, []);

  // Show loading while checking auth
  if (loading) {
    return (
      <div className="min-h-screen flex items-center justify-center" style={{ backgroundColor: 'var(--bg-primary)' }}>
        <div className="text-center">
          <div className="animate-spin rounded-full h-12 w-12 border-b-2 mx-auto mb-4" style={{ borderColor: 'var(--accent-ember)' }}></div>
          <p style={{ color: 'var(--text-secondary)' }}>Loading...</p>
        </div>
      </div>
    );
  }

  // If user is logged in, don't show landing page (redirect handled above)
  if (user) {
    return null;
  }

  return (
    <div className="min-h-screen" style={{ backgroundColor: 'var(--bg-primary)' }}>
      {/* Navigation Bar */}
      <nav className="border-b" style={{ backgroundColor: 'var(--bg-secondary)', borderColor: 'var(--border)' }}>
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex justify-between items-center py-4">
            <div className="flex items-center space-x-3">
              <AnimatedFireLogo size={40} />
              <h1 className="text-2xl font-bold gradient-text-flame">Deck Hearth</h1>
            </div>
            <div className="flex items-center space-x-4">
              <Link 
                href="/login"
                className="px-4 py-2 text-sm font-medium rounded-xl transition-all duration-200 hover:opacity-80"
                style={{ color: 'var(--text-secondary)' }}
              >
                Sign In
              </Link>
              <Link 
                href="/signup"
                className="px-6 py-2 text-sm font-medium rounded-xl transition-all duration-200 hover:opacity-90"
                style={{ 
                  backgroundColor: 'var(--accent-ember)', 
                  color: 'white'
                }}
              >
                Get Started
              </Link>
            </div>
          </div>
        </div>
      </nav>

      {/* Hero Section */}
      <section className="relative py-20 px-4">
        <div className="max-w-6xl mx-auto text-center">
          <div className="mb-8">
            <AnimatedFireLogo size={120} />
          </div>
          <h1 className="text-5xl md:text-7xl font-bold mb-6">
            <span className="gradient-text-flame">Deck Hearth</span>
          </h1>
          <p className="text-xl md:text-2xl mb-8 max-w-3xl mx-auto leading-relaxed" style={{ color: 'var(--text-secondary)' }}>
            The ultimate hub for trading card collectors. Organize your cards into lists,
            discover rare cards, and connect with fellow enthusiasts in one beautiful platform.
          </p>
          <div className="flex flex-col sm:flex-row gap-4 justify-center items-center">
            <Link 
              href="/signup"
              className="px-8 py-4 text-lg font-medium rounded-2xl transition-all duration-200 hover:opacity-90 hover:scale-105"
              style={{ 
                backgroundColor: 'var(--accent-ember)', 
                color: 'white'
              }}
            >
              Start Your Collection
            </Link>
            <Link 
              href="/community/collections"
              className="px-8 py-4 text-lg font-medium rounded-2xl border-2 transition-all duration-200 hover:opacity-80"
              style={{ 
                color: 'var(--text-primary)',
                borderColor: 'var(--accent-ember)'
              }}
            >
              Explore Lists
            </Link>
          </div>
        </div>
      </section>

      {/* Features Section */}
      <section className="py-20 px-4" style={{ backgroundColor: 'var(--bg-secondary)' }}>
        <div className="max-w-6xl mx-auto">
          <h2 className="text-4xl font-bold text-center mb-16 gradient-text-gold">
            Everything You Need to Manage Your Cards
          </h2>
          <div className="grid md:grid-cols-3 gap-8">
            <div className="text-center p-8 rounded-2xl" style={{ backgroundColor: 'var(--bg-primary)' }}>
              <div className="w-16 h-16 mx-auto mb-6 rounded-2xl flex items-center justify-center" style={{ backgroundColor: 'var(--accent-ember)' }}>
                <svg className="w-8 h-8 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 11H5m14 0a2 2 0 012 2v6a2 2 0 01-2 2H5a2 2 0 01-2-2v-6a2 2 0 012-2m14 0V9a2 2 0 00-2-2M5 9a2 2 0 012-2m0 0V5a2 2 0 012-2h6a2 2 0 012 2v2M7 7h10" />
                </svg>
              </div>
              <h3 className="text-xl font-bold mb-4 gradient-text-flame">Organize Lists</h3>
              <p style={{ color: 'var(--text-secondary)' }}>
                Create custom lists, track card values, and organize by sets, rarity, or any system that works for you.
              </p>
            </div>
            <div className="text-center p-8 rounded-2xl" style={{ backgroundColor: 'var(--bg-primary)' }}>
              <div className="w-16 h-16 mx-auto mb-6 rounded-2xl flex items-center justify-center" style={{ backgroundColor: 'var(--accent-gold)' }}>
                <svg className="w-8 h-8 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z" />
                </svg>
              </div>
              <h3 className="text-xl font-bold mb-4 gradient-text-gold">Discover Cards</h3>
              <p style={{ color: 'var(--text-secondary)' }}>
                Search through thousands of cards across multiple TCGs. Find that missing piece for your binder.
              </p>
            </div>
            <div className="text-center p-8 rounded-2xl" style={{ backgroundColor: 'var(--bg-primary)' }}>
              <div className="w-16 h-16 mx-auto mb-6 rounded-2xl flex items-center justify-center" style={{ backgroundColor: 'var(--accent-flame)' }}>
                <svg className="w-8 h-8 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M17 20h5v-2a3 3 0 00-5.356-1.857M17 20H7m10 0v-2c0-.656-.126-1.283-.356-1.857M7 20H2v-2a3 3 0 015.356-1.857M7 20v-2c0-.656.126-1.283.356-1.857m0 0a5.002 5.002 0 019.288 0M15 7a3 3 0 11-6 0 3 3 0 016 0zm6 3a2 2 0 11-4 0 2 2 0 014 0zM7 10a2 2 0 11-4 0 2 2 0 014 0z" />
                </svg>
              </div>
              <h3 className="text-xl font-bold mb-4 gradient-text-ember">Connect & Share</h3>
              <p style={{ color: 'var(--text-secondary)' }}>
                Share your lists with the community, collaborate with friends, and discover amazing lists from other collectors.
              </p>
            </div>
          </div>
        </div>
      </section>

      {/* Featured Collections Section */}
      <section className="py-20 px-4">
        <div className="max-w-6xl mx-auto">
          <div className="text-center mb-16">
            <h2 className="text-4xl font-bold mb-4 gradient-text-flame">
              Featured Lists
            </h2>
            <p className="text-xl" style={{ color: 'var(--text-secondary)' }}>
              Discover amazing lists from our community
            </p>
          </div>

          {collectionsLoading ? (
            <div className="grid md:grid-cols-2 lg:grid-cols-3 gap-6">
              {[...Array(6)].map((_, i) => (
                <div key={i} className="rounded-2xl p-6 animate-pulse" style={{ backgroundColor: 'var(--bg-secondary)' }}>
                  <div className="h-32 rounded-xl mb-4" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
                  <div className="h-6 rounded mb-2" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
                  <div className="h-4 rounded mb-4" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
                  <div className="flex justify-between">
                    <div className="h-4 w-16 rounded" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
                    <div className="h-4 w-20 rounded" style={{ backgroundColor: 'var(--bg-tertiary)' }}></div>
                  </div>
                </div>
              ))}
            </div>
          ) : (
            <div className="grid md:grid-cols-2 lg:grid-cols-3 gap-6">
              {featuredCollections.map((collection) => (
                <Link 
                  key={collection.id} 
                  href={`/collection/${collection.slug || collection.id}`}
                  className="block rounded-2xl p-6 transition-all duration-200 hover:scale-105 hover:shadow-xl"
                  style={{ backgroundColor: 'var(--bg-secondary)' }}
                >
                  <div className="h-32 rounded-xl mb-4 flex items-center justify-center" style={{ backgroundColor: 'var(--bg-tertiary)' }}>
                    {collection.image ? (
                      <img 
                        src={collection.image} 
                        alt={collection.name}
                        className="w-full h-full object-cover rounded-xl"
                      />
                    ) : (
                      <div className="text-center">
                        <div className="w-12 h-12 mx-auto mb-2 rounded-xl flex items-center justify-center" style={{ backgroundColor: 'var(--accent-ember)' }}>
                          <svg className="w-6 h-6 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 11H5m14 0a2 2 0 012 2v6a2 2 0 01-2 2H5a2 2 0 01-2-2v-6a2 2 0 012-2m14 0V9a2 2 0 00-2-2M5 9a2 2 0 012-2m0 0V5a2 2 0 012-2h6a2 2 0 012 2v2M7 7h10" />
                          </svg>
                        </div>
                        <p className="text-sm" style={{ color: 'var(--text-secondary)' }}>{collection.cardCount} cards</p>
                      </div>
                    )}
                  </div>
                  <h3 className="text-xl font-bold mb-2 gradient-text-flame">{collection.name}</h3>
                  <p className="text-sm mb-4 line-clamp-2" style={{ color: 'var(--text-secondary)' }}>
                    {collection.description || 'A carefully curated list'}
                  </p>
                  <div className="flex justify-between items-center">
                    <span className="text-sm font-medium" style={{ color: 'var(--text-primary)' }}>
                      {collection.cardCount} cards
                    </span>
                    <span className="text-sm" style={{ color: 'var(--text-secondary)' }}>
                      by {collection.creator}
                    </span>
                  </div>
                </Link>
              ))}
            </div>
          )}

          <div className="text-center mt-12">
            <Link 
              href="/community/collections"
              className="inline-flex items-center px-6 py-3 text-lg font-medium rounded-xl transition-all duration-200 hover:opacity-80"
              style={{ 
                color: 'var(--accent-ember)',
                border: '2px solid var(--accent-ember)'
              }}
            >
              View All Lists
              <svg className="w-5 h-5 ml-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M17 8l4 4m0 0l-4 4m4-4H3" />
              </svg>
            </Link>
          </div>
        </div>
      </section>

      {/* CTA Section */}
      <section className="py-20 px-4" style={{ backgroundColor: 'var(--bg-secondary)' }}>
        <div className="max-w-4xl mx-auto text-center">
          <h2 className="text-4xl font-bold mb-6 gradient-text-flame">
            Ready to Start Your Journey?
          </h2>
          <p className="text-xl mb-8" style={{ color: 'var(--text-secondary)' }}>
            Join thousands of collectors who trust Deck Hearth to manage their cards and lists.
          </p>
          <div className="flex flex-col sm:flex-row gap-4 justify-center items-center">
            <Link 
              href="/signup"
              className="px-8 py-4 text-lg font-medium rounded-2xl transition-all duration-200 hover:opacity-90 hover:scale-105"
              style={{ 
                backgroundColor: 'var(--accent-ember)', 
                color: 'white'
              }}
            >
              Create Free Account
            </Link>
            <Link 
              href="/cards"
              className="px-8 py-4 text-lg font-medium rounded-2xl border-2 transition-all duration-200 hover:opacity-80"
              style={{ 
                color: 'var(--text-primary)',
                borderColor: 'var(--accent-ember)'
              }}
            >
              Browse Cards
            </Link>
          </div>
        </div>
      </section>

      {/* Footer */}
      <footer className="py-12 px-4 border-t" style={{ backgroundColor: 'var(--bg-primary)', borderColor: 'var(--border)' }}>
        <div className="max-w-6xl mx-auto">
          <div className="flex flex-col md:flex-row justify-between items-center">
            <div className="flex items-center space-x-3 mb-4 md:mb-0">
              <AnimatedFireLogo size={32} />
              <span className="text-xl font-bold gradient-text-flame">Deck Hearth</span>
            </div>
            <div className="flex space-x-6">
              <Link href="/community/collections" className="hover:opacity-80 transition-opacity" style={{ color: 'var(--text-secondary)' }}>
                Community
              </Link>
              <Link href="/cards" className="hover:opacity-80 transition-opacity" style={{ color: 'var(--text-secondary)' }}>
                Cards
              </Link>
              <Link href="/login" className="hover:opacity-80 transition-opacity" style={{ color: 'var(--text-secondary)' }}>
                Sign In
              </Link>
            </div>
          </div>
          <div className="mt-8 pt-8 border-t text-center" style={{ borderColor: 'var(--border)' }}>
            <p style={{ color: 'var(--text-secondary)' }}>
              © 2024 Deck Hearth. Built for collectors, by collectors.
            </p>
          </div>
        </div>
      </footer>
    </div>
  );
}