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";
import { Loader2 } from "lucide-react";

const buttonVariants = cva(
  "inline-flex items-center justify-center whitespace-nowrap rounded-xl text-sm font-medium transition-all duration-200 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-indigo-500 focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 active:scale-95",
  {
    variants: {
      variant: {
        default: "bg-indigo-600 text-white hover:bg-indigo-700 shadow-lg shadow-indigo-500/25",
        destructive: "bg-red-500 text-white hover:bg-red-600 shadow-lg shadow-red-500/25",
        outline: "border-2 border-slate-300 dark:border-slate-600 bg-transparent hover:bg-slate-100 dark:hover:bg-slate-800",
        secondary: "bg-slate-100 text-slate-900 hover:bg-slate-200 dark:bg-slate-800 dark:text-slate-100 dark:hover:bg-slate-700",
        ghost: "hover:bg-slate-100 dark:hover:bg-slate-800",
        link: "text-indigo-600 underline-offset-4 hover:underline",
        gradient: "bg-gradient-to-r from-indigo-600 to-purple-600 text-white hover:from-indigo-700 hover:to-purple-700 shadow-lg shadow-purple-500/25",
        success: "bg-emerald-500 text-white hover:bg-emerald-600 shadow-lg shadow-emerald-500/25",
        warning: "bg-amber-500 text-white hover:bg-amber-600 shadow-lg shadow-amber-500/25",
      },
      size: {
        default: "h-10 px-4 py-2",
        sm: "h-9 rounded-lg px-3 text-xs",
        lg: "h-12 rounded-xl px-8 text-base",
        xl: "h-14 rounded-xl px-10 text-lg",
        icon: "h-10 w-10",
        "icon-sm": "h-8 w-8 rounded-lg",
      },
      fullWidth: {
        true: "w-full",
      },
    },
    defaultVariants: {
      variant: "default",
      size: "default",
      fullWidth: false,
    },
  }
);

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

const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
  ({ className, variant, size, fullWidth, asChild = false, loading, leftIcon, rightIcon, children, disabled, ...props }, ref) => {
    const Comp = asChild ? Slot : "button";
    return (
      <Comp
        className={cn(buttonVariants({ variant, size, fullWidth, className }))}
        ref={ref}
        disabled={disabled || loading}
        {...props}
      >
        {loading ? (
          <Loader2 className="mr-2 h-4 w-4 animate-spin" />
        ) : leftIcon ? (
          <span className="mr-2">{leftIcon}</span>
        ) : null}
        {children}
        {rightIcon && <span className="ml-2">{rightIcon}</span>}
      </Comp>
    );
  }
);

Button.displayName = "Button";

export { Button, buttonVariants };