import * as React from 'react'
import { Slot } from '@radix-ui/react-slot'
import { cva, type VariantProps } from 'class-variance-authority'

import { cn } from '@/utils/cn'

const buttonVariants = cva(
  [
    'inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium',
    'ring-offset-background focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2',
    'disabled:pointer-events-none disabled:opacity-50',
    '[&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0',
    // Modern animations
    'transition-all duration-200 ease-out',
    'active:scale-[0.98]',
  ],
  {
    variants: {
      variant: {
        default: [
          'bg-primary text-primary-foreground',
          'hover:bg-primary/90 hover:shadow-md',
          'dark:hover:shadow-lg dark:hover:shadow-primary/5',
        ],
        destructive: [
          'bg-destructive text-white',
          'hover:bg-destructive/90 hover:shadow-md',
        ],
        outline: [
          'border border-input bg-background',
          'hover:bg-accent hover:text-accent-foreground hover:border-accent-foreground/20',
          'dark:hover:bg-accent/50',
        ],
        secondary: [
          'bg-secondary text-secondary-foreground',
          'hover:bg-secondary/80 hover:shadow-sm',
        ],
        ghost: [
          'hover:bg-accent hover:text-accent-foreground',
          'dark:hover:bg-accent/50',
        ],
        link: [
          'text-primary underline-offset-4',
          'hover:underline',
        ],
        // Modern tech style variants
        glow: [
          'bg-primary text-primary-foreground',
          'hover:shadow-lg hover:shadow-primary/25',
          'dark:hover:shadow-primary/10',
        ],
        gradient: [
          'bg-gradient-to-r from-primary to-primary/80 text-primary-foreground',
          'hover:from-primary/90 hover:to-primary/70 hover:shadow-md',
        ],
      },
      size: {
        default: 'h-10 px-4 py-2',
        sm: 'h-9 rounded-md px-3',
        lg: 'h-11 rounded-md px-8',
        xl: 'h-12 rounded-lg px-10 text-base',
        icon: 'h-10 w-10',
      },
    },
    defaultVariants: {
      variant: 'default',
      size: 'default',
    },
  }
)

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

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

export { Button, buttonVariants }
