"use client";

import * as React from "react";
import { Slot } from "@radix-ui/react-slot";
import { cva, type VariantProps } from "class-variance-authority";
import { cn } from "@/lib/utils";

const button = cva(
  "inline-flex items-center justify-center gap-1.5 font-semibold cursor-pointer " +
    "select-none whitespace-nowrap focus-ring " +
    "transition-[background,border-color,color,transform,box-shadow] " +
    "duration-150 ease-out active:scale-[0.97] " +
    "disabled:opacity-40 disabled:cursor-default disabled:pointer-events-none " +
    "disabled:active:scale-100",
  {
    variants: {
      variant: {
        // The accent is fixed now, not sampled from artwork, so a solid button
        // has a known contrast ratio and can carry a plain white label. It
        // used to be near-black text on a colour taken from the album cover,
        // which only worked because colour.ts clamped the luminance.
        primary: "bg-accent text-[var(--accent-ink)] shadow-[var(--e1)] hover:brightness-110",
        secondary:
          "bg-[var(--surface-3)] text-ink border border-edge hover:border-edge-hi " +
          "hover:bg-[var(--surface-2)]",
        outline:
          "bg-transparent border border-edge-hi text-ink " +
          "hover:border-accent-line hover:bg-accent-soft hover:text-accent",
        quiet: "bg-transparent text-dim hover:text-ink hover:bg-[var(--faint)]",
        danger: "bg-transparent border border-err/45 text-err hover:bg-err/10",
      },
      size: {
        xs: "text-caption px-2.5 py-1 rounded-control gap-1",
        sm: "text-callout px-3 py-1.5 rounded-control",
        md: "text-callout px-4 py-2 rounded-control",
        lg: "text-body px-5 py-2.5 rounded-control font-semibold",
        icon: "h-8 w-8 rounded-control",
        pill: "text-callout px-4 py-1.5 rounded-pill",
      },
    },
    defaultVariants: { variant: "primary", size: "md" },
  },
);

export interface ButtonProps
  extends React.ButtonHTMLAttributes<HTMLButtonElement>,
    VariantProps<typeof button> {
  asChild?: boolean;
}

export const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
  ({ className, variant, size, asChild, ...props }, ref) => {
    const Comp = asChild ? Slot : "button";
    return <Comp ref={ref} className={cn(button({ variant, size }), className)} {...props} />;
  },
);
Button.displayName = "Button";