"use client";

import { motion, useReducedMotion } from "framer-motion";
import type { SynopStation, WeatherMood } from "@/types/imgw";

const windLines = Array.from({ length: 7 }, (_, index) => ({
  top: `${18 + index * 11}%`,
  delay: index * 0.22,
  width: 70 + (index % 3) * 34,
}));

const stars = Array.from({ length: 16 }, (_, index) => ({
  left: `${(index * 37 + 11) % 96}%`,
  top: `${(index * 23 + 8) % 72}%`,
  delay: (index % 6) * 0.35,
}));

const rainDrops = Array.from({ length: 22 }, (_, index) => ({
  left: `${(index * 43 + 7) % 101}%`,
  delay: (index % 9) * 0.18,
  duration: 0.8 + (index % 4) * 0.14,
}));

export function WeatherEffects({ station, mood, precipitation10m, thunderstorm = false }: { station: SynopStation; mood: WeatherMood; precipitation10m?: number | null; thunderstorm?: boolean }) {
  const reduceMotion = useReducedMotion();
  const isWindy = (station.windSpeed ?? 0) >= 8;
  const isRaining = (precipitation10m ?? 0) > 0;

  return (
    <div aria-hidden="true" className="pointer-events-none absolute inset-0 z-[1] overflow-hidden">
      {mood === "cloudy" && (
        <>
          <motion.div
            animate={reduceMotion ? undefined : { x: ["-4%", "5%", "-4%"], y: [0, 8, 0], scale: [1, 1.05, 1] }}
            transition={{ duration: 18, repeat: Infinity, ease: "easeInOut" }}
            className="absolute -left-24 -top-20 h-52 w-[78%] rounded-[50%] bg-slate-100/30 blur-3xl"
          />
          <motion.div
            animate={reduceMotion ? undefined : { x: ["8%", "-5%", "8%"], y: [0, -6, 0], scale: [1.04, 1, 1.04] }}
            transition={{ duration: 22, repeat: Infinity, ease: "easeInOut" }}
            className="absolute -right-24 top-0 h-60 w-[82%] rounded-[50%] bg-slate-300/24 blur-3xl"
          />
          <div className="absolute inset-x-0 bottom-0 h-44 bg-gradient-to-t from-slate-100/25 via-slate-200/10 to-transparent" />
          <div className="absolute inset-x-0 top-0 h-32 bg-gradient-to-b from-slate-950/15 to-transparent" />
        </>
      )}
      {mood === "warm" && (
        <motion.div
          animate={reduceMotion ? undefined : { scale: [1, 1.08, 1], opacity: [0.4, 0.58, 0.4] }}
          transition={{ duration: 7, repeat: Infinity, ease: "easeInOut" }}
          className="absolute -right-16 -top-20 size-64 rounded-full bg-amber-200/45 blur-3xl"
        />
      )}
      {mood === "night" && stars.map((star, index) => (
        <motion.span
          key={index}
          animate={reduceMotion ? undefined : { opacity: [0.2, 0.75, 0.2] }}
          transition={{ duration: 2.4, delay: star.delay, repeat: Infinity, ease: "easeInOut" }}
          className="absolute size-1 rounded-full bg-white/75"
          style={{ left: star.left, top: star.top }}
        />
      ))}
      {isWindy && windLines.map((line, index) => (
        <motion.span
          key={index}
          initial={{ x: "-30%", opacity: 0 }}
          animate={reduceMotion ? { opacity: 0.28 } : { x: ["-30%", "135%"], opacity: [0, 0.35, 0] }}
          transition={{ duration: 3.4, delay: line.delay, repeat: Infinity, ease: "linear" }}
          className="absolute h-px rounded-full bg-white/60"
          style={{ top: line.top, width: line.width }}
        />
      ))}
      {isRaining && rainDrops.map((drop, index) => (
        <motion.span
          key={`rain-${index}`}
          initial={{ y: "-12vh", opacity: 0 }}
          animate={reduceMotion ? { opacity: 0.36 } : { y: ["-12vh", "115vh"], opacity: [0, 0.55, 0] }}
          transition={{ duration: drop.duration, delay: drop.delay, repeat: Infinity, ease: "linear" }}
          className="absolute -top-8 h-14 w-px rotate-[8deg] rounded-full bg-gradient-to-b from-transparent via-white/55 to-transparent blur-[0.35px]"
          style={{ left: drop.left }}
        />
      ))}
      {thunderstorm && (
        <motion.div
          animate={reduceMotion ? { opacity: 0.12 } : { opacity: [0, 0, 0.34, 0, 0.18, 0] }}
          transition={{ duration: 6, repeat: Infinity, repeatDelay: 2.5 }}
          className="absolute inset-0 bg-white"
        />
      )}
      {mood === "cold" && (
        <div className="absolute inset-x-0 bottom-0 h-28 bg-gradient-to-t from-cyan-100/20 to-transparent" />
      )}
    </div>
  );
}