"use client"

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

const buttonVariants = cva(
  "inline-flex items-center justify-center gap-2 whitespace-nowrap font-body font-medium transition-all duration-150 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--accent)] disabled:pointer-events-none disabled:opacity-40 cursor-pointer",
  {
    variants: {
      variant: {
        primary:
          "bg-[var(--accent)] text-[var(--text)] hover:bg-[var(--accent-dark)] active:scale-[0.98]",
        secondary:
          "bg-[var(--surface-raised)] text-[var(--text)] hover:bg-[var(--border-subtle)] border border-[var(--border)]",
        ghost:
          "bg-transparent text-[var(--text)] hover:bg-[var(--surface)] border border-transparent hover:border-[var(--border)]",
        outline:
          "bg-transparent text-[var(--text)] border border-[var(--border)] hover:border-[var(--border-subtle)] hover:bg-[var(--surface)]",
        destructive:
          "bg-red-600 text-white hover:bg-red-700",
        link:
          "bg-transparent text-[var(--accent)] underline-offset-4 hover:underline p-0 h-auto",
      },
      size: {
        sm:   "h-8 px-3 text-sm rounded-[var(--radius)]",
        md:   "h-10 px-5 text-sm rounded-[var(--radius-md)]",
        lg:   "h-12 px-8 text-base rounded-[var(--radius-md)]",
        xl:   "h-14 px-10 text-base rounded-[var(--radius-lg)]",
        icon: "h-10 w-10 rounded-[var(--radius-md)]",
      },
    },
    defaultVariants: {
      variant: "primary",
      size: "md",
    },
  }
)

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

const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
  ({ className, variant, size, asChild, children, ...props }, ref) => {
    const classes = cn(buttonVariants({ variant, size, className }))

    if (asChild && React.isValidElement(children)) {
      const child = children as React.ReactElement<{ className?: string }>
      return React.cloneElement(child, {
        className: cn(classes, child.props.className),
      })
    }

    return (
      <button ref={ref} className={classes} {...props}>
        {children}
      </button>
    )
  }
)
Button.displayName = "Button"

export { Button, buttonVariants }