import { RiHeart3Line as BookHeart, RiBookOpenLine as BookOpen, RiCalendarLine as CalendarRange, RiRestaurantLine as UtensilsCrossed } from "@remixicon/react";
import Link from "next/link";
import type { ReactNode } from "react";
import { buttonStyles } from "@/components/base/buttons/button";
import { ThemeToggle } from "@/components/application/theme/theme-toggle";
import { cx } from "@/utils/cx";

type ActiveNav = "home" | "recipes" | "caydens-corner" | "plan";

export function Logo({ small = false, subtitle }: { small?: boolean; subtitle?: ReactNode }) {
  return (
    <div className="flex shrink-0 items-center gap-2.5">
      <Link
        href="/"
        aria-label="Plan my Meals home"
        className={`grid shrink-0 place-items-center rounded-lg border border-brand-border bg-brand-950 text-brand-300 transition-colors hover:bg-selected ${
          small ? "size-7" : "size-9"
        }`}
      >
        <UtensilsCrossed className={small ? "size-3.5" : "size-4"} strokeWidth={2} aria-hidden />
      </Link>
      <div className="min-w-0">
        <Link
          href="/"
          className={`block font-serif leading-tight font-semibold tracking-tight whitespace-nowrap hover:text-brand-300 ${
            small ? "text-sm text-ink-muted" : "text-lg text-ink"
          }`}
        >
          Plan my Meals
        </Link>
        <div className="flex items-center gap-1.5 text-xs leading-tight text-ink-faint whitespace-nowrap">
          <span>
            by{" "}
            <a
              href="https://caydens.dev"
              target="_blank"
              rel="noopener noreferrer"
              className="font-medium text-ink-muted transition-colors hover:text-brand-300 hover:underline"
            >
              Cayden Codes
            </a>
          </span>
          {subtitle && (
            <>
              <span aria-hidden>·</span>
              {subtitle}
            </>
          )}
        </div>
      </div>
    </div>
  );
}

interface SiteHeaderProps {
  active?: ActiveNav;
  subtitle?: ReactNode;
  rightSlot?: ReactNode;
}

export function SiteHeader({ active = "home", subtitle, rightSlot }: SiteHeaderProps) {
  const linkClass = (isCurrent: boolean) =>
    cx(
      "inline-flex h-9 items-center gap-1.5 rounded-2lg px-2.5 text-body-medium transition-colors duration-150 sm:px-3",
      isCurrent
        ? "bg-background-secondary-default text-text-primary"
        : "text-text-secondary hover:bg-background-secondary-hover hover:text-text-primary",
    );

  return (
    <header className="sticky top-0 z-30 border-b border-separator-border bg-background-primary-default/90 backdrop-blur-md">
      <div className="mx-auto flex max-w-7xl items-center gap-2 px-4 py-2.5 sm:gap-4 sm:px-6">
        <Logo subtitle={subtitle} />

        <nav aria-label="Primary" className="ml-auto flex items-center gap-1 whitespace-nowrap">
          <Link
            href="/recipes"
            aria-current={active === "recipes" ? "page" : undefined}
            className={linkClass(active === "recipes")}
            title="Recipe library"
          >
            <BookOpen className="size-4 shrink-0" strokeWidth={1.75} aria-hidden />
            <span className="sr-only md:not-sr-only">Recipes</span>
          </Link>

          <Link
            href="/caydens-corner"
            aria-current={active === "caydens-corner" ? "page" : undefined}
            className={linkClass(active === "caydens-corner")}
            title="Cayden's Corner"
          >
            <BookHeart className="size-4 shrink-0" strokeWidth={1.75} aria-hidden />
            <span className="sr-only md:not-sr-only">Cayden&apos;s Corner</span>
          </Link>

          {active !== "plan" && (
            <Link
              href="/plan"
              className={cx(buttonStyles.base, buttonStyles.size.medium, buttonStyles.variant.primary, "ml-1 gap-1.5 px-3")}
            >
              <CalendarRange className={buttonStyles.icon.medium} aria-hidden />
              <span className="sm:hidden">Planner</span>
              <span className="hidden sm:inline">Open planner</span>
            </Link>
          )}
        </nav>

        {rightSlot}

        <ThemeToggle appearance="segmented" size="small" />
      </div>
    </header>
  );
}