import { Button } from '../ui/button';
import { Card } from '../ui/card';
import { EmptyState } from '../ui/empty-state';
import { Skeleton } from '../ui/skeleton';
import { useCartStore } from '../../stores/cartStore';
import { Product } from '../../types';
import { Heart, Pause, Play, ShoppingCart, Trash2, Zap } from 'lucide-react';
import React, { useState } from 'react';
import { motion } from 'framer-motion';
import { useToast } from '../../components/feedback/ToastProvider';
import { useAuthStore } from '@/features/auth/store/authStore';
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import { marketplaceService } from '@/services/marketplaceService';

const gridVariants = {
  visible: { transition: { staggerChildren: 0.06, delayChildren: 0.04 } },
};
const cardVariants = {
  hidden: { opacity: 0, y: 16, scale: 0.97 },
  visible: {
    opacity: 1,
    y: 0,
    scale: 1,
    transition: { duration: 0.35, ease: [0.33, 1, 0.68, 1] as const },
  },
};

const WISHLIST_QUERY_KEY = ['wishlist'];

export const WishlistView: React.FC = () => {
  const addToCart = useCartStore((state) => state.addItem);
  const { addToast } = useToast();
  const queryClient = useQueryClient();
  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
  const [playingPreview, setPlayingPreview] = useState<string | null>(null);

  const {
    data: wishlist = [],
    isLoading,
    isError,
    error,
  } = useQuery({
    queryKey: WISHLIST_QUERY_KEY,
    queryFn: () => marketplaceService.getWishlist(),
    enabled: isAuthenticated,
  });

  const removeMutation = useMutation({
    mutationFn: (productId: string) => marketplaceService.removeFromWishlist(productId),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: WISHLIST_QUERY_KEY });
      addToast('Removed from wishlist', 'info');
    },
    onError: (err: Error) => {
      addToast(err.message || 'Failed to remove from wishlist', 'error');
    },
  });

  const handleRemove = (id: string) => {
    if (!isAuthenticated) return;
    removeMutation.mutate(id);
  };

  const handleAddToCart = (product: Product) => {
    addToCart(product);
    handleRemove(product.id);
  };

  const handleAddAll = () => {
    wishlist.forEach((p) => addToCart(p));
    wishlist.forEach((p) => handleRemove(p.id));
    addToast('All items moved to cart', 'success');
  };

  if (!isAuthenticated) {
    return (
      <EmptyState
        variant="centered"
        icon={<Heart className="w-full h-full" />}
        title="Sign in to view your wishlist"
        description="Create an account or log in to save items you love."
        action={{
          label: 'Sign in',
          onClick: () => (window.location.href = '/login'),
        }}
        size="lg"
        className="min-h-96"
      />
    );
  }

  if (isError) {
    return (
      <EmptyState
        variant="centered"
        icon={<Heart className="w-full h-full" />}
        title="Could not load wishlist"
        description={error instanceof Error ? error.message : 'Something went wrong.'}
        action={{
          label: 'Try again',
          onClick: () => queryClient.invalidateQueries({ queryKey: WISHLIST_QUERY_KEY }),
        }}
        size="lg"
        className="min-h-96"
      />
    );
  }

  if (isLoading) {
    return (
      <div className="max-w-6xl mx-auto pb-20">
        <div className="flex flex-col md:flex-row justify-between items-end border-b border-border/50 pb-6 gap-4 mb-8">
          <div>
            <Skeleton className="h-9 w-48 mb-2" />
            <Skeleton variant="text" className="w-32" />
          </div>
          <Skeleton className="h-10 w-44" />
        </div>
        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
          {[1, 2, 3].map((i) => (
            <Skeleton key={i} className="h-96 w-full rounded-lg" />
          ))}
        </div>
      </div>
    );
  }

  if (wishlist.length === 0) {
    return (
      <EmptyState
        variant="centered"
        icon={<Heart className="w-full h-full" />}
        title="Your wishlist is empty"
        description="Explore the marketplace and save items you love."
        action={{
          label: 'Browse Marketplace',
          onClick: () => (window.location.href = '/marketplace'),
        }}
        size="lg"
        className="min-h-96"
      />
    );
  }

  return (
    <div className="animate-fadeIn max-w-6xl mx-auto pb-20">
      <div className="flex flex-col md:flex-row justify-between items-end border-b border-border/50 pb-6 gap-4 mb-8">
        <div>
          <h1 className="text-3xl font-heading font-bold text-foreground mb-2 tracking-tight">
            WISHLIST
          </h1>
          <p className="text-muted-foreground font-mono text-sm">
            {wishlist.length} saved items
          </p>
        </div>
        <Button
          variant="primary"
          icon={<ShoppingCart className="w-4 h-4" />}
          onClick={handleAddAll}
        >
          ADD ALL TO CART
        </Button>
      </div>

      <motion.div
        className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6"
        variants={gridVariants}
        initial="hidden"
        animate="visible"
      >
        {wishlist.map((product) => (
          <motion.div key={product.id} variants={cardVariants}>
          <Card
            variant="default"
            className="p-4 group hover:shadow-[0_0_12px_rgba(26,26,30,0.08)] transition-all duration-[var(--sumi-duration-normal)]"
          >
            <div className="flex gap-4">
              <div className="relative w-24 h-24 bg-muted rounded-lg overflow-hidden flex-shrink-0">
                <img
                  src={product.coverUrl}
                  className="w-full h-full object-cover group-hover:scale-110 transition-transform duration-[var(--sumi-duration-slow)]"
                />
                <div
                  className="absolute inset-0 bg-black/40 flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity cursor-pointer"
                  onClick={() =>
                    setPlayingPreview(
                      playingPreview === product.id ? null : product.id,
                    )
                  }
                >
                  {playingPreview === product.id ? (
                    <Pause className="w-8 h-8 text-foreground" />
                  ) : (
                    <Play className="w-8 h-8 text-foreground fill-current" />
                  )}
                </div>
                {product.isHot && (
                  <div className="absolute top-1 left-1 bg-warning text-warning-foreground text-xs font-bold px-1.5 py-0.5 rounded">
                    <Zap className="w-2 h-2 inline" /> HOT
                  </div>
                )}
              </div>

              <div className="flex-1 min-w-0 flex flex-col justify-between">
                <div>
                  <h3 className="font-bold text-foreground truncate">
                    {product.title}
                  </h3>
                  <p className="text-xs text-muted-foreground truncate">
                    {product.author}
                  </p>
                  <p className="text-xs text-muted-foreground mt-1 capitalize">
                    {product.type}
                  </p>
                </div>
                <div className="text-lg font-mono font-bold text-muted-foreground">
                  ${product.price}
                </div>
              </div>
            </div>

            <div className="flex gap-2 mt-4 pt-4 border-t border-border/30">
              <Button
                variant="secondary"
                size="sm"
                className="flex-1"
                onClick={() => handleAddToCart(product)}
              >
                Add to Cart
              </Button>
              <Button
                variant="ghost"
                size="icon"
                className="text-muted-foreground hover:text-destructive"
                onClick={() => handleRemove(product.id)}
              >
                <Trash2 className="w-4 h-4" />
              </Button>
            </div>
          </Card>
          </motion.div>
        ))}
      </motion.div>
    </div>
  );
};