"use client";

import { motion, useReducedMotion } from "framer-motion";
import clsx from "clsx";

type Props = {
  className?: string;
  accent?: string;
  bg?: string;
};

const W = 760;
const H = 420;

/** Node = local data cluster */
const Node = ({
  x,
  y,
  r = 10,
  accent = "#00b8db",
  pulse = false,
  delay = 0,
}: {
  x: number;
  y: number;
  r?: number;
  accent?: string;
  pulse?: boolean;
  delay?: number;
}) => {
  const prefers = useReducedMotion();
  return (
    <>
      {/* outer glow */}
      <motion.circle
        cx={x}
        cy={y}
        r={r + 8}
        stroke="#1F2937"
        strokeWidth={2}
        fill="none"
        initial={{ opacity: 0 }}
        animate={{ opacity: 0.9 }}
        transition={{ delay, duration: 0.6 }}
      />
      {/* data core */}
      <motion.circle
        cx={x}
        cy={y}
        r={r}
        fill={accent}
        initial={{ opacity: 0, scale: 0.8 }}
        animate={{
          opacity: 1,
          scale: pulse && !prefers ? [1, 1.15, 1] : 1,
        }}
        transition={{
          delay,
          duration: pulse && !prefers ? 1.6 : 0.6,
          repeat: pulse && !prefers ? Infinity : 0,
          repeatType: "mirror",
          ease: [0.22, 1, 0.36, 1],
        }}
      />
    </>
  );
};

/** A data particle traveling along a given path */
const Particle = ({
  path,
  delay = 0,
  accent = "#00b8db",
  duration = 2,
  reverse = false,
}: {
  path: string;
  delay?: number;
  accent?: string;
  duration?: number;
  reverse?: boolean;
}) => {
  const prefers = useReducedMotion();
  return (
    <motion.circle
      r={4}
      fill={accent}
      initial={{ offsetDistance: reverse ? "100%" : "0%", opacity: 0 }}
      animate={{
        offsetDistance: reverse ? ["100%", "0%"] : ["0%", "100%"],
        opacity: [0, 1, 0],
      }}
      transition={{
        delay,
        duration,
        repeat: !prefers ? Infinity : 0,
        repeatType: "mirror",
        ease: "easeInOut",
      }}
      style={{
        offsetPath: `path('${path}')`,
      }}
    />
  );
};

export default function NoExtraction({
  className,
  accent = "#00b8db",
  bg = "#0a0a0a",
}: Props) {
  const center = { x: 380, y: 210 };
  const WBOX = 360;
  const HBOX = 220;
  const boxX = center.x - WBOX / 2;
  const boxY = center.y - HBOX / 2;

  // local nodes within boundary
  const nodes = [
    { x: center.x - 80, y: center.y - 40 },
    { x: center.x + 60, y: center.y - 50 },
    { x: center.x, y: center.y + 50 },
    { x: center.x - 50, y: center.y + 30 },
  ];

  // internal circulation paths
  const internalPaths = [
    `M ${center.x - 80} ${center.y - 40} Q ${center.x} ${center.y - 80} ${center.x + 60} ${center.y - 50}`,
    `M ${center.x - 50} ${center.y + 30} Q ${center.x} ${center.y + 70} ${center.x} ${center.y + 50}`,
  ];

  // escape attempt path
  const attemptPath = `M ${center.x} ${center.y} Q ${center.x + 200} ${center.y - 50} ${center.x + 130} ${center.y}`;

  return (
    <div
      className={clsx("relative overflow-hidden", className)}
      aria-hidden="true"
      role="img"
      aria-label="No data extraction illustration"
      style={{ background: bg }}
    >
      <svg viewBox={`0 0 ${W} ${H}`} className="w-full h-full">
        {/* Background grid */}
        <defs>
          <pattern id="grid-dark" width="28" height="28" patternUnits="userSpaceOnUse">
            <path d="M 28 0 L 0 0 0 28" fill="none" stroke="#0f0f0f" strokeWidth="1" />
          </pattern>

          {/* Cyan glow gradient */}
          <radialGradient id="glow" cx="50%" cy="50%" r="50%">
            <stop offset="0%" stopColor={accent} stopOpacity="0.15" />
            <stop offset="100%" stopColor={accent} stopOpacity="0" />
          </radialGradient>
        </defs>
        <rect width={W} height={H} fill="url(#grid-dark)" />

        {/* Cyan ambient glow field */}
        <circle
          cx={center.x}
          cy={center.y}
          r={160}
          fill="url(#glow)"
          opacity={0.3}
        />

        {/* Secure boundary box */}
        <motion.rect
          x={boxX}
          y={boxY}
          width={WBOX}
          height={HBOX}
          rx={16}
          stroke="#1F2937"
          strokeWidth={3}
          fill="none"
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          transition={{ duration: 0.6 }}
        />

        {/* Cyan encryption border */}
        <motion.rect
          x={boxX + 4}
          y={boxY + 4}
          width={WBOX - 8}
          height={HBOX - 8}
          rx={14}
          stroke={accent}
          strokeWidth={2}
          strokeDasharray="10 6"
          fill="none"
          animate={{ opacity: [0.4, 0.9, 0.4] }}
          transition={{
            duration: 2,
            repeat: Infinity,
            ease: "easeInOut",
          }}
        />

        {/* Internal data circulation */}
        {internalPaths.map((p, i) => (
          <Particle
            key={`int-${i}`}
            path={p}
            delay={i * 0.6}
            accent={accent}
            duration={3}
          />
        ))}

        {/* Local data nodes */}
        {nodes.map((n, i) => (
          <Node
            key={i}
            x={n.x}
            y={n.y}
            r={10}
            accent={accent}
            pulse={i === 2}
            delay={i * 0.2}
          />
        ))}

        {/* Data packet attempting to leave */}
        <Particle path={attemptPath} delay={0.5} accent={accent} duration={2.2} />

        {/* Impact glow at boundary */}
        <motion.circle
          cx={center.x + 130}
          cy={center.y - 10}
          r={10}
          fill="#FF4D4D"
          initial={{ scale: 0, opacity: 0 }}
          animate={{ scale: [0, 1.2, 0.8], opacity: [0, 1, 0] }}
          transition={{
            delay: 0.9,
            duration: 1.4,
            repeat: Infinity,
            repeatDelay: 1.5,
            ease: "easeOut",
          }}
        />
      </svg>
    </div>
  );
}