button.tsx

import { Slot } from "@radix-ui/react-slot";
import { type VariantProps, cva } from "class-variance-authority";
import { Loader2Icon } from "lucide-react";
import { type ButtonHTMLAttributes, type ReactElement, cloneElement, forwardRef } from "react";
import type { Simplify } from "type-fest";
import { cn } from "./cn";

export const buttonVariants = cva(
  "inline-flex items-center justify-center whitespace-nowrap rounded-md font-bold text-sm transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background disabled:pointer-events-none disabled:opacity-50",
  {
    variants: {
      variant: {
        default: "bg-primary font-bold text-primary-foreground hover:bg-primary/90 hover:text-primary-foreground",
        destructive: "bg-destructive text-destructive-foreground hover:bg-destructive/90",
        outline: "border border-input bg-background hover:bg-accent hover:text-accent-foreground",
        secondary: "bg-secondary text-secondary-foreground hover:bg-secondary/80",
        ghost: "hover:bg-accent hover:text-accent-foreground",
      },
      size: {
        default: "h-9 px-4 py-2",
        sm: "h-8 rounded-md px-3 text-xs",
        lg: "h-10 rounded-md px-8 text-lg",
        icon: "size-9",
        "icon-sm": "size-8",
      },
    },
    defaultVariants: {
      variant: "default",
      size: "default",
    },
  },
);

export const iconVariants = cva(undefined, {
  variants: {
    size: {
      default: "size-4 max-w-4",
      sm: "size-3 max-w-3",
      lg: "size-5 max-w-5",
      icon: "mr-0 size-4",
      "icon-sm": "mr-0 size-3",
    },
  },
  defaultVariants: {
    size: "default",
  },
});

export type ButtonProps = Simplify<
  ButtonHTMLAttributes<HTMLButtonElement> &
    VariantProps<typeof buttonVariants> & {
      asChild?: boolean;
      isLoading?: boolean;
      startIcon?: ReactElement;
      endIcon?: ReactElement;
    }
>;

const Button = forwardRef<HTMLButtonElement, ButtonProps>(
  ({ className, startIcon, isLoading = false, variant, endIcon, size, children, asChild = false, ...rest }, ref) => {
    const Component = asChild ? Slot : "button";

    return (
      <Component className={cn(buttonVariants({ variant, size, className }))} ref={ref} {...rest}>
        <div
          data-testid="loader-icon"
          aria-hidden={!isLoading}
          className={cn(!startIcon && "transition-all", "mr-2", iconVariants({ size }), !isLoading && "mr-0 max-w-0")}
        >
          {isLoading && <Loader2Icon className={cn(iconVariants({ size }), "animate-spin")} />}
        </div>
        {!isLoading &&
          startIcon &&
          cloneElement(startIcon as ReactElement, {
            className: cn("mr-2", iconVariants({ size }), startIcon.props.className),
          })}
        {children}
        {endIcon &&
          cloneElement(endIcon as ReactElement, {
            className: cn("ml-2", iconVariants({ size }), endIcon.props.className),
          })}
      </Component>
    );
  },
);

Button.displayName = "Button";

export { Button };