import { Trash } from "lucide-react";
import { memo, useMemo } from "react";
import { QuantityControl } from "./QuantityControl";
import { formatPrice } from "../../utils/helpers";
import { CartItem as CartItemType } from "src/api/types";
import { isVideo } from "../MondrianProductList";
import { Button } from "../ui/button";

interface CartItemProps {
  item: CartItemType;
  onQuantityChange: (itemId: string, quantity: number) => void;
  onRemoveItem: (itemId: string) => void;
  isLoading: boolean;
  hasBorder: boolean;
}

export const CartItem = memo(function CartItem({
  item,
  onQuantityChange,
  onRemoveItem,
  isLoading,
  hasBorder,
}: CartItemProps) {
  // Memoize discount calculation
  const discountPercent = useMemo(() => {
    if (!item.productVariant?.discountPrice || !item.productVariant?.price) {
      return null;
    }
    return Math.round(
      ((Number(item.productVariant.price) -
        Number(item.productVariant.discountPrice)) /
        Number(item.productVariant.price)) *
        100
    );
  }, [item.productVariant?.discountPrice, item.productVariant?.price]);

  const isVideoMedia = useMemo(
    () => isVideo(item.productVariant?.productImage || ""),
    [item.productVariant?.productImage]
  );

  const color =
    item.productVariant?.color?.value !== "UNSELECTED"
      ? item.productVariant?.color?.info?.detail || ""
      : "";
  const size =
    item.productVariant?.size?.value !== "UNSELECTED"
      ? item.productVariant?.size?.info?.detail || ""
      : "";

  const effectivePrice =
    item.productVariant?.discountPrice || item.productVariant?.price || "";
  const inStock =
    !!item?.productVariant?.stock && item.productVariant.stock > 0;

  return (
    <div className={`flex gap-3 p-4 w-full ${hasBorder && "border-b"}`}>
      {isVideoMedia ? (
        <video
          src={item.productVariant?.productImage}
          className="rounded-[11px] w-[88px] h-[110px] object-cover shrink-0"
          muted
          loop
          autoPlay
          playsInline
        />
      ) : (
        <img
          src={item.productVariant?.productImage}
          alt={item.productVariant?.productTitle || ""}
          className="rounded-[11px] w-[88px] h-[110px] object-cover shrink-0"
          loading="lazy"
        />
      )}

      <div className="flex flex-col flex-1 min-w-0">
        <h4 className="text-B14 font-bold line-clamp-2">
          {item.productVariant?.productTitle || ""}
        </h4>

        {/* Attribute chips */}
        {(color || size) && (
          <div className="flex gap-1.5 flex-wrap mt-2">
            {color && (
              <span className="inline-flex items-center gap-1.5 text-R12 text-BLACK2 bg-WHITE3 rounded-[7px] px-2 py-1">
                <span
                  className="w-3.5 h-3.5 rounded-full border border-WHITE3"
                  style={{ backgroundColor: color }}
                />
                رنگ
              </span>
            )}
            {size && (
              <span className="text-R12 text-BLACK2 bg-WHITE3 rounded-[7px] px-2 py-1">
                سایز {size}
              </span>
            )}
          </div>
        )}

        {/* Bottom row: stepper + price */}
        {inStock ? (
          <div className="flex items-center gap-3 mt-auto pt-3">
            <QuantityControl
              isPending={isLoading}
              quantity={item.quantity}
              maxQuantity={item.productVariant?.stock || 0}
              onIncrease={() =>
                onQuantityChange(item.id || "", item.quantity + 1)
              }
              onDecrease={() =>
                onQuantityChange(item.id || "", item.quantity - 1)
              }
              onRemove={() => onRemoveItem(item.id || "")}
            />
            <div className="ms-auto text-left">
              <b className="text-B14 font-bold">
                {formatPrice(effectivePrice)}
                <span className="text-R10 font-semibold text-BLACK2"> ت</span>
              </b>
              {discountPercent ? (
                <del className="block text-R10 text-GRAY">
                  {formatPrice(item.productVariant?.price || "")}
                </del>
              ) : null}
            </div>
          </div>
        ) : (
          <div className="flex w-full items-center justify-between mt-auto pt-3">
            <p className="text-R12 font-bold text-RED">
              در حال حاضر موجود نیست
            </p>
            <Button
              variant="dark"
              className="flex items-center gap-2 bg-red-500"
              size="sm"
              onClick={() => onRemoveItem(item.id || "")}
            >
              <Trash size={16} />
            </Button>
          </div>
        )}
      </div>
    </div>
  );
});