"use client";

import { motion, useReducedMotion } from "motion/react";

type OrbitLoaderProps = {
  className?: string;
  color?: string;
  /** Loader width in pixels. */
  size?: number;
  /** 1 is the default pace; 2 is twice as fast. */
  speed?: number;
  /** Read out by screen readers. */
  label?: string;
};

/* OrbitLoader: three moons circle a glowing core on tilted rings, each at its own pace. */
export function OrbitLoader({
  className = "",
  color = "#a78bfa",
  size = 72,
  speed = 1,
  label = "Loading",
}: OrbitLoaderProps) {
  const reduce = useReducedMotion();
  const rings = [
    { tilt: 0, scale: 1, duration: 1.6 },
    { tilt: 60, scale: 0.8, duration: 2.2 },
    { tilt: -60, scale: 0.6, duration: 1.2 },
  ];
  const moon = Math.max(4, size / 12);

  return (
    <div role="status" className={`relative inline-block ${className}`} style={{ width: size, height: size }}>
      <span className="sr-only">{label}</span>
      <motion.span
        aria-hidden
        className="absolute inset-0 m-auto rounded-full"
        style={{ width: size / 5, height: size / 5, background: color, boxShadow: `0 0 ${size / 4}px ${color}` }}
        animate={reduce ? undefined : { scale: [1, 1.2, 1] }}
        transition={{ duration: 1.4 / speed, repeat: Infinity, ease: "easeInOut" }}
      />
      {rings.map((r) => {
        const rx = (size / 2) * r.scale;
        const ry = rx * 0.4;
        const steps = Array.from({ length: 25 }, (_, i) => (i / 24) * Math.PI * 2);
        return (
          <span key={r.tilt} aria-hidden className="absolute inset-0" style={{ transform: `rotate(${r.tilt}deg)` }}>
            <span
              className="absolute inset-0 m-auto rounded-[50%] border"
              style={{ width: rx * 2, height: ry * 2, borderColor: `color-mix(in srgb, ${color} 25%, transparent)` }}
            />
            <motion.span
              className="absolute left-1/2 top-1/2 rounded-full"
              style={{ width: moon, height: moon, marginLeft: -moon / 2, marginTop: -moon / 2, background: color }}
              animate={{ x: steps.map((a) => Math.cos(a) * rx), y: steps.map((a) => Math.sin(a) * ry) }}
              transition={{ duration: (reduce ? r.duration * 4 : r.duration) / speed, repeat: Infinity, ease: "linear" }}
            />
          </span>
        );
      })}
    </div>
  );
}