import Link from "next/link";
import clsx from "clsx";
import { cn } from "@/lib/utils";

const baseStyles = {
	solid:
		"group inline-flex items-center justify-center rounded-full py-2 px-4 text-sm font-semibold focus:outline-none focus-visible:outline-2 focus-visible:outline-offset-2",
	outline:
		"group inline-flex ring-1 items-center justify-center rounded-full py-2 px-4 text-sm focus:outline-none",
};

const variantStyles = {
	solid: {
		slate:
			"bg-slate-900 text-white hover:bg-slate-700 hover:text-slate-100 active:bg-slate-800 active:text-slate-300 focus-visible:outline-slate-900",
		blue: "bg-blue-600 text-white hover:text-slate-100 hover:bg-blue-500 active:bg-blue-800 active:text-blue-100 focus-visible:outline-blue-600",
		white:
			"bg-white text-slate-900 hover:bg-blue-50 active:bg-blue-200 active:text-slate-600 focus-visible:outline-white",
	},
	outline: {
		slate:
			"ring-slate-200 text-slate-700 hover:text-slate-900 hover:ring-slate-300 active:bg-slate-100 active:text-slate-600 focus-visible:outline-blue-600 focus-visible:ring-slate-300",
		white:
			"ring-slate-700 text-white hover:ring-slate-500 active:ring-slate-700 active:text-slate-400 focus-visible:outline-white",
	},
};

type VariantKey = keyof typeof variantStyles;
type ColorKey<Variant extends VariantKey> =
	keyof (typeof variantStyles)[Variant];

type ButtonProps<
	Variant extends VariantKey,
	Color extends ColorKey<Variant>,
> = {
	variant?: Variant;
	color?: Color;
} & (
	| Omit<React.ComponentPropsWithoutRef<typeof Link>, "color">
	| (Omit<React.ComponentPropsWithoutRef<"button">, "color"> & {
			href?: undefined;
	  })
);

export function Button<
	Color extends ColorKey<Variant>,
	Variant extends VariantKey = "solid",
>({ variant, color, className, ...props }: ButtonProps<Variant, Color>) {
	variant = variant ?? ("solid" as Variant);
	color = color ?? ("slate" as Color);

	className = cn(baseStyles[variant], variantStyles[variant][color], className);

	return typeof props.href === "undefined" ? (
		<button className={className} {...props} />
	) : (
		<Link className={className} {...props} />
	);
}