import { useState } from 'react';
import { Cat } from '@/api/endpoints';
import { useAuth } from '@/hooks/useAuth';
import { useLikeCat, useUnlikeCat } from '@/hooks/useLikes';
import { Avatar, AvatarFallback } from '@/components/ui/avatar';
import { Heart, MessageCircle } from 'lucide-react';
import { useToast } from '@/components/Toast';

interface CatCardProps {
  cat: Cat;
  onOpen: (id: number) => void;
}

export default function CatCard({ cat, onOpen }: CatCardProps) {
  const { user, updateUser } = useAuth();
  const [liked, setLiked] = useState(false);
  const [likeCount, setLikeCount] = useState(cat.likes_count);
  const [animating, setAnimating] = useState(false);
  const [showHeart, setShowHeart] = useState(false);
  const { toast } = useToast();
  const likeMutation = useLikeCat(cat.id);
  const unlikeMutation = useUnlikeCat(cat.id);
  const isOwner = user && cat.user_id === user.id;

  const handleDoubleClick = () => {
    setShowHeart(true);
    setTimeout(() => setShowHeart(false), 500);
    if (!liked && !isOwner) handleLikeAction();
  };

  const handleLikeAction = async () => {
    if (isOwner || !user) return;
    setAnimating(true);
    setTimeout(() => setAnimating(false), 450);

    if (liked) {
      setLiked(false);
      setLikeCount((c) => c - 1);
      try {
        const res = await unlikeMutation.mutateAsync();
        if (res.ownerPoints !== undefined && cat.user_id === user.id)
          updateUser({ ...user, points: res.ownerPoints });
      } catch { setLiked(true); setLikeCount((c) => c + 1); }
    } else {
      setLiked(true);
      setLikeCount((c) => c + 1);
      toast('Нравится ♥', 'like');
      try { await likeMutation.mutateAsync(); }
      catch { setLiked(false); setLikeCount((c) => c - 1); }
    }
  };

  const handleLike = () => handleLikeAction();

  const formatDate = (dateStr: string) => {
    const d = new Date(dateStr);
    const now = new Date();
    const diff = now.getTime() - d.getTime();
    const days = Math.floor(diff / (1000 * 60 * 60 * 24));
    if (days === 0) return 'Сегодня';
    if (days === 1) return 'Вчера';
    return d.toLocaleDateString('ru-RU', { day: 'numeric', month: 'long' });
  };

  return (
    <div className="animate-fade-in bg-white rounded-2xl shadow-sm border border-border/60 overflow-hidden mb-5">
      {/* Header */}
      <div className="flex items-center justify-between px-4 py-3">
        <div
          className="flex items-center gap-2.5 cursor-pointer"
          onClick={() => window.location.href = `/profile/${cat.user_id}`}
        >
          <Avatar className="h-8 w-8 ring-2 ring-offset-1 ring-orange-200">
            <AvatarFallback className="text-xs bg-gradient-to-br from-orange-400 to-rose-500 text-white">
              {cat.username.charAt(0).toUpperCase()}
            </AvatarFallback>
          </Avatar>
          <div>
            <span className="text-sm font-semibold text-foreground">@{cat.username}</span>
            <span className="ml-2 text-xs text-muted-foreground">{formatDate(cat.created_at)}</span>
          </div>
        </div>
      </div>

      {/* Image */}
      <div
        className="relative bg-gradient-to-b from-transparent to-muted/30 cursor-pointer"
        onDoubleClick={handleDoubleClick}
        onClick={() => onOpen(cat.id)}
      >
        <img
          src={cat.image_url}
          alt={cat.caption || 'Фото кота'}
          className="w-full max-h-[520px] object-contain select-none"
          draggable={false}
          loading="lazy"
        />
        {showHeart && (
          <div className="absolute inset-0 flex items-center justify-center pointer-events-none">
            <Heart className="heart-burst h-24 w-24 text-white drop-shadow-xl" strokeWidth={1.5} />
          </div>
        )}
      </div>

      {/* Actions */}
      <div className="px-4 pt-3 pb-1">
        <div className="flex items-center gap-4">
          <button
            onClick={handleLike}
            disabled={isOwner || !user}
            className={`like-btn ${animating ? 'heart-animate' : ''}`}
          >
            <Heart
              className={`h-6 w-6 transition-all ${
                liked ? 'fill-rose-500 text-rose-500' : 'text-foreground hover:text-rose-400'
              }`}
              strokeWidth={liked ? 2.5 : 1.5}
            />
          </button>
          <button onClick={() => onOpen(cat.id)} className="hover:text-primary transition-colors">
            <MessageCircle className="h-6 w-6" strokeWidth={1.5} />
          </button>
        </div>
      </div>

      {/* Likes */}
      <div className="px-4 pb-0.5">
        <span className="text-sm font-bold">{likeCount.toLocaleString('ru-RU')} отметок «Нравится»</span>
      </div>

      {/* Caption */}
      {cat.caption && (
        <div className="px-4 pb-0.5">
          <span className="text-sm">
            <span className="font-semibold mr-1.5">@{cat.username}</span>
            {cat.caption}
          </span>
        </div>
      )}

      {/* Comments link */}
      <div className="px-4 pb-3">
        <button
          onClick={() => onOpen(cat.id)}
          className="text-sm text-muted-foreground hover:text-foreground transition-colors"
        >
          Смотреть комментарии
        </button>
      </div>
    </div>
  );
}