'use client';

import { useEffect, useState } from 'react';

interface GitHubStarsProps extends React.AnchorHTMLAttributes<HTMLAnchorElement> {
  repo?: string;
}

function formatNumber(num: number): string {
  if (num >= 1000) {
    return `${(num / 1000).toFixed(1)}k`;
  }
  return num.toString();
}

export function GitHubStars({
  repo = 'rivet-dev/sandbox-agent',
  className,
  ...props
}: GitHubStarsProps) {
  const [stars, setStars] = useState<number | null>(null);

  useEffect(() => {
    const cacheKey = `github-stars-${repo}`;
    const cachedData = sessionStorage.getItem(cacheKey);

    if (cachedData) {
      const { stars: cachedStars, timestamp } = JSON.parse(cachedData);
      // Check if cache is less than 5 minutes old
      if (Date.now() - timestamp < 5 * 60 * 1000) {
        setStars(cachedStars);
        return;
      }
    }

    fetch(`https://api.github.com/repos/${repo}`)
      .then((response) => {
        if (!response.ok) throw new Error('Failed to fetch');
        return response.json();
      })
      .then((data) => {
        const newStars = data.stargazers_count;
        setStars(newStars);
        sessionStorage.setItem(
          cacheKey,
          JSON.stringify({
            stars: newStars,
            timestamp: Date.now(),
          }),
        );
      })
      .catch((err) => {
        console.error('Failed to fetch stars', err);
      });
  }, [repo]);

  return (
    <a
      href={`https://github.com/${repo}`}
      target="_blank"
      rel="noreferrer"
      className={className}
      {...props}
    >
      <svg
        className="w-5 h-5"
        fill="currentColor"
        viewBox="0 0 24 24"
        xmlns="http://www.w3.org/2000/svg"
      >
        <path d="M12 0c-6.626 0-12 5.373-12 12 0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931 0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176 0 0 1.008-.322 3.301 1.23.957-.266 1.983-.399 3.003-.404 1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221 0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576 4.765-1.589 8.199-6.086 8.199-11.386 0-6.627-5.373-12-12-12z" />
      </svg>
      <span className="hidden md:inline">
        {stars ? `${formatNumber(stars)} Stars` : 'GitHub'}
      </span>
    </a>
  );
}
