/**
 * LoadingSpinner - Configurable loading indicator.
 *
 * Sizes: sm | md | lg | xl
 * Can display an optional message below the spinner.
 * Supports full-screen overlay mode.
 */

import PropTypes from "prop-types";

const SIZE_MAP = {
  sm: "h-5 w-5",
  md: "h-8 w-8",
  lg: "h-12 w-12",
  xl: "h-16 w-16",
};

function LoadingSpinner({
  size = "md",
  message,
  fullScreen = false,
  className = "",
}) {
  const spinner = (
    <div
      className={`flex flex-col items-center justify-center gap-3 ${className}`}
      role="status"
      aria-label={message || "Loading"}
    >
      <svg
        className={`animate-spin text-primary-600 ${SIZE_MAP[size] || SIZE_MAP.md}`}
        xmlns="http://www.w3.org/2000/svg"
        fill="none"
        viewBox="0 0 24 24"
        aria-hidden="true"
      >
        <circle
          className="opacity-25"
          cx="12"
          cy="12"
          r="10"
          stroke="currentColor"
          strokeWidth="4"
        />
        <path
          className="opacity-75"
          fill="currentColor"
          d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"
        />
      </svg>
      {message && (
        <p className="text-sm text-neutral-600">{message}</p>
      )}
    </div>
  );

  if (fullScreen) {
    return (
      <div className="fixed inset-0 z-40 flex items-center justify-center bg-white/80 backdrop-blur-sm">
        {spinner}
      </div>
    );
  }

  return spinner;
}

LoadingSpinner.propTypes = {
  size: PropTypes.oneOf(["sm", "md", "lg", "xl"]),
  message: PropTypes.string,
  fullScreen: PropTypes.bool,
  className: PropTypes.string,
};

export default LoadingSpinner;