"use client";
import { motion, useScroll, useTransform } from "motion/react";
import type React from "react";
import { useEffect, useRef, useState } from "react";

interface TimelineEntry {
  title: string;
  content: React.ReactNode;
}

export const Timeline = ({ data }: { data: TimelineEntry[] }) => {
  const ref = useRef<HTMLDivElement>(null);
  const containerRef = useRef<HTMLDivElement>(null);
  const [height, setHeight] = useState(0);

  useEffect(() => {
    if (ref.current) {
      const rect = ref.current.getBoundingClientRect();
      setHeight(rect.height);
    }
  }, [ref]);

  const { scrollYProgress } = useScroll({
    target: containerRef,
    offset: ["start 10%", "end 50%"],
  });

  const heightTransform = useTransform(scrollYProgress, [0, 1], [0, height]);
  const opacityTransform = useTransform(scrollYProgress, [0, 0.1], [0, 1]);

  return (
    <div
      className="w-full bg-white font-sans md:px-10 dark:bg-neutral-950"
      ref={containerRef}
    >
      <div className="mx-auto max-w-7xl px-4 py-20 md:px-8 lg:px-10">
        <h2 className="mb-4 max-w-4xl text-black text-lg md:text-4xl dark:text-white">
          Changelog from my journey
        </h2>
        <p className="max-w-sm text-neutral-700 text-sm md:text-base dark:text-neutral-300">
          I&apos;ve been working on Aceternity for the past 2 years. Here&apos;s
          a timeline of my journey.
        </p>
      </div>

      <div className="relative mx-auto max-w-7xl pb-20" ref={ref}>
        {data.map((item, index) => (
          <div
            className="flex justify-start pt-10 md:gap-10 md:pt-40"
            key={index}
          >
            <div className="sticky top-40 z-40 flex max-w-xs flex-col items-center self-start md:w-full md:flex-row lg:max-w-sm">
              <div className="absolute left-3 flex h-10 w-10 items-center justify-center rounded-full bg-white md:left-3 dark:bg-black">
                <div className="h-4 w-4 rounded-full border border-neutral-300 bg-neutral-200 p-2 dark:border-neutral-700 dark:bg-neutral-800" />
              </div>
              <h3 className="hidden font-bold text-neutral-500 text-xl md:block md:pl-20 md:text-5xl dark:text-neutral-500">
                {item.title}
              </h3>
            </div>

            <div className="relative w-full pr-4 pl-20 md:pl-4">
              <h3 className="mb-4 block text-left font-bold text-2xl text-neutral-500 md:hidden dark:text-neutral-500">
                {item.title}
              </h3>
              {item.content}{" "}
            </div>
          </div>
        ))}
        <div
          className="absolute top-0 left-8 w-[2px] overflow-hidden bg-[linear-gradient(to_bottom,var(--tw-gradient-stops))] from-[0%] from-transparent via-neutral-200 to-[99%] to-transparent [mask-image:linear-gradient(to_bottom,transparent_0%,black_10%,black_90%,transparent_100%)] md:left-8 dark:via-neutral-700"
          style={{
            height: `${height}px`,
          }}
        >
          <motion.div
            className="absolute inset-x-0 top-0 w-[2px] rounded-full bg-gradient-to-t from-[0%] from-purple-500 via-[10%] via-blue-500 to-transparent"
            style={{
              height: heightTransform,
              opacity: opacityTransform,
            }}
          />
        </div>
      </div>
    </div>
  );
};
