import { useCallback } from 'react'

export interface RecentRepo {
  ownerName: string
  name: string
  visitedAt: number
}

const KEY = 'fb_recent_repos'
const MAX = 5

function read(): RecentRepo[] {
  try {
    return JSON.parse(localStorage.getItem(KEY) ?? '[]')
  } catch {
    return []
  }
}

export function useRecentRepos() {
  const repos = read()

  const track = useCallback((ownerName: string, name: string) => {
    const existing = read().filter(r => !(r.ownerName === ownerName && r.name === name))
    const updated: RecentRepo[] = [{ ownerName, name, visitedAt: Date.now() }, ...existing].slice(0, MAX)
    localStorage.setItem(KEY, JSON.stringify(updated))
  }, [])

  return { repos, track }
}