import { Menu as MenuIcon, ShoppingBag, Search } from "lucide-react";
import { useState } from "react";
import { Link } from "react-router";
import { useShopifyCart } from "@/hooks/use-shopify-cart";
import { Sheet, SheetContent, SheetHeader, SheetTitle } from "@/components/ui/sheet";
import { cn } from "@/lib/utils";

export type NavigationProps = {
  brand: string;
  logo?: string;
  links: Array<{ label: string; href: string }>;
  showSearch: "yes" | "no";
  showCart: "yes" | "no";
  sticky: "yes" | "no";
  tone: "default" | "muted" | "inverse";
  bannerText: string;
  bannerTone: "default" | "accent" | "inverse";
};

export function Navigation({
  brand,
  logo,
  links,
  showSearch,
  showCart,
  sticky,
  tone,
  bannerText,
  bannerTone,
}: NavigationProps) {
  const [mobileOpen, setMobileOpen] = useState(false);
  const [cartOpen, setCartOpen] = useState(false);
  const cart = useShopifyCart();
  const itemCount = cart?.itemCount ?? 0;

  const toneClass: Record<NavigationProps["tone"], string> = {
    default: "bg-background text-foreground border-b border-border",
    muted: "bg-muted/40 text-foreground border-b border-border",
    inverse: "bg-foreground text-background",
  };

  const bannerToneClass: Record<NavigationProps["bannerTone"], string> = {
    default: "bg-muted text-foreground",
    accent: "bg-primary text-primary-foreground",
    inverse: "bg-foreground text-background",
  };

  const hasBanner = typeof bannerText === "string" && bannerText.trim().length > 0;

  return (
    <>
      <div
        className={cn(
          "w-full",
          sticky === "yes" && "sticky top-0 z-40",
        )}
      >
        {hasBanner && (
          <div className={cn("w-full", bannerToneClass[bannerTone])}>
            <div className="container mx-auto max-w-7xl px-6 py-2 text-center text-xs tracking-wide md:text-sm">
              {bannerText}
            </div>
          </div>
        )}
      <header
        className={cn(
          "w-full",
          sticky === "yes" && "backdrop-blur",
          toneClass[tone],
        )}
      >
        <div className="container mx-auto flex h-16 max-w-7xl items-center justify-between px-6 md:h-20">
          <Link
            to="/"
            className="inline-flex items-center font-semibold tracking-tight"
            style={{ fontSize: "1.125rem", letterSpacing: "0.02em" }}
          >
            {logo ? (
              <img
                src={logo}
                alt={brand || "Brand Logo"}
                className="h-8 w-auto object-contain"
              />
            ) : (
              brand || "Brand Logo"
            )}
          </Link>

          <nav className="hidden items-center gap-8 md:flex">
            {links.map((l) => (
              <Link
                key={l.href + l.label}
                to={l.href}
                className="text-sm tracking-wide opacity-80 transition-opacity hover:opacity-100"
              >
                {l.label}
              </Link>
            ))}
          </nav>

          <div className="flex items-center gap-1">
            {showSearch === "yes" && (
              <button
                aria-label="Search"
                className="hidden h-10 w-10 items-center justify-center rounded-full transition-colors hover:bg-foreground/5 md:inline-flex"
              >
                <Search size={18} strokeWidth={1.5} />
              </button>
            )}
            {showCart === "yes" && (
              <button
                onClick={() => setCartOpen(true)}
                aria-label="Cart"
                className="relative inline-flex h-10 w-10 items-center justify-center rounded-full transition-colors hover:bg-foreground/5"
              >
                <ShoppingBag size={18} strokeWidth={1.5} />
                {itemCount > 0 && (
                  <span className="absolute -right-0.5 -top-0.5 inline-flex h-4 min-w-4 items-center justify-center rounded-full bg-foreground px-1 text-[10px] font-medium text-background">
                    {itemCount}
                  </span>
                )}
              </button>
            )}
            <button
              onClick={() => setMobileOpen(true)}
              aria-label="Menu"
              className="inline-flex h-10 w-10 items-center justify-center rounded-full transition-colors hover:bg-foreground/5 md:hidden"
            >
              <MenuIcon size={20} strokeWidth={1.5} />
            </button>
          </div>
        </div>
      </header>
      </div>

      {/* Mobile menu */}
      <Sheet open={mobileOpen} onOpenChange={setMobileOpen}>
        <SheetContent side="right" className="w-[88vw] max-w-sm">
          <SheetHeader>
            <SheetTitle className="text-left">{brand}</SheetTitle>
          </SheetHeader>
          <nav className="mt-6 flex flex-col gap-1">
            {links.map((l) => (
              <Link
                key={l.href + l.label}
                to={l.href}
                className="rounded-md px-3 py-3 text-base hover:bg-muted"
              >
                {l.label}
              </Link>
            ))}
          </nav>
        </SheetContent>
      </Sheet>

      {/* Cart drawer */}
      <Sheet open={cartOpen} onOpenChange={setCartOpen}>
        <SheetContent side="right" className="flex w-[92vw] max-w-md flex-col">
          <SheetHeader>
            <SheetTitle className="text-left">Cart</SheetTitle>
          </SheetHeader>

          <div className="-mx-6 mt-4 flex-1 overflow-y-auto px-6">
            {cart?.items?.length ? (
              <ul className="divide-y divide-border">
                {cart.items.map((line: any) => (
                  <li key={line.id} className="flex gap-4 py-4">
                    <div className="aspect-square h-20 flex-shrink-0 overflow-hidden rounded-md bg-muted">
                      {line.merchandise?.product?.images?.edges?.[0]?.node?.url ? (
                        <img
                          src={line.merchandise.product.images.edges[0].node.url}
                          alt={line.merchandise.product.title}
                          className="h-full w-full object-cover"
                        />
                      ) : null}
                    </div>
                    <div className="flex flex-1 flex-col">
                      <p className="text-sm font-medium">{line.merchandise?.product?.title}</p>
                      {line.merchandise?.title && line.merchandise.title !== "Default Title" ? (
                        <p className="text-xs text-muted-foreground">{line.merchandise.title}</p>
                      ) : null}
                      <div className="mt-auto flex items-center justify-between">
                        <div className="flex items-center gap-2 text-xs">
                          <button
                            onClick={() => cart.updateItemQuantity(line.id, line.quantity - 1)}
                            className="h-6 w-6 rounded-full border border-border hover:bg-muted"
                          >
                            −
                          </button>
                          <span>{line.quantity}</span>
                          <button
                            onClick={() => cart.updateItemQuantity(line.id, line.quantity + 1)}
                            className="h-6 w-6 rounded-full border border-border hover:bg-muted"
                          >
                            +
                          </button>
                        </div>
                        <span className="text-sm">
                          {line.merchandise?.price
                            ? new Intl.NumberFormat("en-US", {
                                style: "currency",
                                currency: line.merchandise.price.currencyCode,
                              }).format(parseFloat(line.merchandise.price.amount) * line.quantity)
                            : null}
                        </span>
                      </div>
                    </div>
                  </li>
                ))}
              </ul>
            ) : (
              <div className="flex h-full flex-col items-center justify-center gap-3 text-center text-sm text-muted-foreground">
                <ShoppingBag size={28} strokeWidth={1.25} />
                <p>Your cart is empty.</p>
              </div>
            )}
          </div>

          {cart?.items?.length ? (
            <div className="border-t border-border pt-4">
              <div className="mb-4 flex items-center justify-between text-sm">
                <span className="text-muted-foreground">Subtotal</span>
                <span className="font-medium">
                  {new Intl.NumberFormat("en-US", {
                    style: "currency",
                    currency: cart.cart?.cost?.totalAmount?.currencyCode ?? "USD",
                  }).format(cart.totalAmount)}
                </span>
              </div>
              <a
                href={cart.checkoutUrl ?? "#"}
                className="inline-flex w-full items-center justify-center rounded-full bg-foreground px-4 py-3 text-sm font-medium text-background transition-opacity hover:opacity-90"
              >
                Checkout
              </a>
            </div>
          ) : null}
        </SheetContent>
      </Sheet>
    </>
  );
}