"use client";

import { Button } from "@/components/ui/button";
import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "@/components/ui/card";
import { formatCurrency } from "@/lib/utils";

export interface CartItem {
  id: string;
  name: string;
  price: number;
  quantity: number;
  stock: number;
  trackStock: boolean;
}

interface CartProps {
  items: CartItem[];
  onUpdateQuantity: (productId: string, quantity: number) => void;
  onRemoveItem: (productId: string) => void;
  onClearCart: () => void;
  onCheckout: () => void;
  disabled?: boolean;
}

export function Cart({
  items,
  onUpdateQuantity,
  onRemoveItem,
  onClearCart,
  onCheckout,
  disabled = false,
}: CartProps) {
  const subtotal = items.reduce(
    (sum, item) => sum + item.price * item.quantity,
    0
  );

  const handleIncrement = (item: CartItem) => {
    // Check stock if tracking
    if (item.trackStock && item.quantity >= item.stock) {
      return;
    }
    onUpdateQuantity(item.id, item.quantity + 1);
  };

  const handleDecrement = (item: CartItem) => {
    if (item.quantity > 1) {
      onUpdateQuantity(item.id, item.quantity - 1);
    } else {
      onRemoveItem(item.id);
    }
  };

  return (
    <Card className="h-full flex flex-col">
      <CardHeader className="border-b">
        <div className="flex items-center justify-between">
          <CardTitle className="text-lg">Carrito</CardTitle>
          {items.length > 0 && (
            <Button
              variant="ghost"
              size="sm"
              onClick={onClearCart}
              disabled={disabled}
              className="text-red-500 hover:text-red-600 hover:bg-red-50"
            >
              Vaciar
            </Button>
          )}
        </div>
      </CardHeader>

      <CardContent className="flex-1 overflow-y-auto p-0">
        {items.length === 0 ? (
          <div className="flex items-center justify-center h-full text-primary-400 p-6">
            <div className="text-center">
              <div className="text-4xl mb-2">🛒</div>
              <p>El carrito esta vacio</p>
              <p className="text-sm mt-1">Selecciona productos para agregar</p>
            </div>
          </div>
        ) : (
          <ul className="divide-y divide-primary-100">
            {items.map((item) => (
              <li key={item.id} className="p-4">
                <div className="flex items-start justify-between gap-2">
                  <div className="flex-1 min-w-0">
                    <h4 className="font-medium text-primary-800 text-sm truncate">
                      {item.name}
                    </h4>
                    <p className="text-primary-500 text-xs mt-0.5">
                      {formatCurrency(item.price)} c/u
                    </p>
                  </div>
                  <Button
                    variant="ghost"
                    size="icon"
                    className="h-6 w-6 text-red-400 hover:text-red-500 hover:bg-red-50 shrink-0"
                    onClick={() => onRemoveItem(item.id)}
                    disabled={disabled}
                  >
                    <svg
                      xmlns="http://www.w3.org/2000/svg"
                      viewBox="0 0 20 20"
                      fill="currentColor"
                      className="w-4 h-4"
                    >
                      <path
                        fillRule="evenodd"
                        d="M8.75 1A2.75 2.75 0 006 3.75v.443c-.795.077-1.584.176-2.365.298a.75.75 0 10.23 1.482l.149-.022.841 10.518A2.75 2.75 0 007.596 19h4.807a2.75 2.75 0 002.742-2.53l.841-10.519.149.023a.75.75 0 00.23-1.482A41.03 41.03 0 0014 4.193V3.75A2.75 2.75 0 0011.25 1h-2.5zM10 4c.84 0 1.673.025 2.5.075V3.75c0-.69-.56-1.25-1.25-1.25h-2.5c-.69 0-1.25.56-1.25 1.25v.325C8.327 4.025 9.16 4 10 4zM8.58 7.72a.75.75 0 00-1.5.06l.3 7.5a.75.75 0 101.5-.06l-.3-7.5zm4.34.06a.75.75 0 10-1.5-.06l-.3 7.5a.75.75 0 101.5.06l.3-7.5z"
                        clipRule="evenodd"
                      />
                    </svg>
                  </Button>
                </div>

                <div className="flex items-center justify-between mt-3">
                  {/* Quantity Controls */}
                  <div className="flex items-center gap-1">
                    <Button
                      variant="outline"
                      size="icon"
                      className="h-8 w-8"
                      onClick={() => handleDecrement(item)}
                      disabled={disabled}
                    >
                      <svg
                        xmlns="http://www.w3.org/2000/svg"
                        viewBox="0 0 20 20"
                        fill="currentColor"
                        className="w-4 h-4"
                      >
                        <path d="M6.75 9.25a.75.75 0 000 1.5h6.5a.75.75 0 000-1.5h-6.5z" />
                      </svg>
                    </Button>
                    <span className="w-10 text-center font-medium text-primary-800">
                      {item.quantity}
                    </span>
                    <Button
                      variant="outline"
                      size="icon"
                      className="h-8 w-8"
                      onClick={() => handleIncrement(item)}
                      disabled={
                        disabled ||
                        (item.trackStock && item.quantity >= item.stock)
                      }
                    >
                      <svg
                        xmlns="http://www.w3.org/2000/svg"
                        viewBox="0 0 20 20"
                        fill="currentColor"
                        className="w-4 h-4"
                      >
                        <path d="M10.75 6.75a.75.75 0 00-1.5 0v2.5h-2.5a.75.75 0 000 1.5h2.5v2.5a.75.75 0 001.5 0v-2.5h2.5a.75.75 0 000-1.5h-2.5v-2.5z" />
                      </svg>
                    </Button>
                  </div>

                  {/* Subtotal */}
                  <span className="font-bold text-primary-800">
                    {formatCurrency(item.price * item.quantity)}
                  </span>
                </div>

                {/* Stock Warning */}
                {item.trackStock && item.quantity >= item.stock && (
                  <p className="text-xs text-amber-600 mt-2">
                    Stock maximo alcanzado
                  </p>
                )}
              </li>
            ))}
          </ul>
        )}
      </CardContent>

      <CardFooter className="flex-col gap-4 border-t p-4">
        {/* Total */}
        <div className="w-full flex items-center justify-between">
          <span className="text-lg font-medium text-primary-600">Total:</span>
          <span className="text-2xl font-bold text-primary-800">
            {formatCurrency(subtotal)}
          </span>
        </div>

        {/* Checkout Button */}
        <Button
          className="w-full"
          size="lg"
          disabled={items.length === 0 || disabled}
          onClick={onCheckout}
        >
          Cobrar
        </Button>
      </CardFooter>
    </Card>
  );
}