"use client";

import {
  forwardRef,
  type ComponentPropsWithoutRef,
  type ReactNode,
} from "react";

import { cn } from "@/lib/cn";

export type ThreeDButtonVariant = "solid" | "soft" | "muted";
export type ThreeDButtonSize = "sm" | "md" | "lg" | "icon";

export type ThreeDButtonProps = Readonly<
  {
    children: ReactNode;
    variant?: ThreeDButtonVariant;
    size?: ThreeDButtonSize;
  } & ComponentPropsWithoutRef<"button">
>;

const SIZE: Record<ThreeDButtonSize, string> = {
  sm: "h-9 gap-1.5 rounded-lg px-3 text-xs",
  md: "h-10 gap-2 rounded-lg px-4 text-sm",
  lg: "h-12 gap-2 rounded-xl px-5 text-sm",
  icon: "size-10 rounded-lg p-0",
};

// Soft diffused top light + bottom shade — no hard white rim.
const BEVEL_LIGHT =
  "shadow-[0_1px_1px_rgba(0,0,0,0.08),0_2px_4px_rgba(0,0,0,0.1),0_6px_12px_rgba(0,0,0,0.08),inset_0_1px_2px_rgba(255,255,255,0.35),inset_0_-2px_4px_rgba(0,0,0,0.08)]";
const PRESSED_LIGHT =
  "active:shadow-[0_1px_1px_rgba(0,0,0,0.05),inset_0_1px_2px_rgba(0,0,0,0.08),inset_0_2px_4px_rgba(0,0,0,0.04),inset_0_-1px_2px_rgba(0,0,0,0.05)]";

// Dark key: soft top sheen (blurred, not a sharp bar) + deep lift + bottom recess.
const BEVEL_DARK =
  "shadow-[0_1px_1px_rgba(0,0,0,0.35),0_3px_6px_rgba(0,0,0,0.28),0_8px_16px_rgba(0,0,0,0.22),inset_0_1px_2px_rgba(255,255,255,0.14),inset_0_-3px_6px_rgba(0,0,0,0.55)]";
const PRESSED_DARK =
  "active:shadow-[0_1px_2px_rgba(0,0,0,0.25),inset_0_2px_6px_rgba(0,0,0,0.55),inset_0_-1px_1px_rgba(255,255,255,0.06)]";

const VARIANT: Record<ThreeDButtonVariant, string> = {
  solid: cn(
    "bg-neutral-800 text-white hover:bg-neutral-700 active:bg-neutral-900",
    BEVEL_DARK,
    PRESSED_DARK,
  ),
  soft: cn(
    "bg-neutral-50 text-neutral-800 hover:text-neutral-900 active:bg-neutral-100",
    BEVEL_LIGHT,
    PRESSED_LIGHT,
  ),
  muted: cn(
    "bg-neutral-100 text-neutral-700 hover:bg-neutral-200/80 hover:text-neutral-900 active:bg-neutral-200",
    BEVEL_LIGHT,
    PRESSED_LIGHT,
  ),
};

// Universal 3D button — pass any children (label, icon + label, icon only).
export const ThreeDButton = forwardRef<HTMLButtonElement, ThreeDButtonProps>(
  (
    {
      className,
      children,
      variant = "solid",
      size = "md",
      type = "button",
      disabled,
      ...props
    },
    ref,
  ) => {
    return (
      <button
        ref={ref}
        type={type}
        disabled={disabled}
        data-slot="3d-button"
        data-variant={variant}
        data-size={size}
        className={cn(
          "inline-flex cursor-pointer items-center justify-center font-sans font-semibold outline-none select-none",
          "transition-[background-color,box-shadow,color] duration-200 ease-[cubic-bezier(0.32,0.72,0,1)] motion-reduce:transition-none",
          "focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-neutral-900",
          "disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-40",
          SIZE[size],
          VARIANT[variant],
          size === "icon" && "shrink-0",
          className,
        )}
        {...props}
      >
        {children}
      </button>
    );
  },
);

ThreeDButton.displayName = "ThreeDButton";