'use client'

import { useCallback, useEffect, useState } from 'react'
import Link from 'next/link'
import { parseGitStatus } from '@/lib/parse-git'
import { fetchAgentOutput } from '@/lib/agent-fetch'

type GitData = { dirty: number; total: number }
export type GitInitial =
  | { configured: false }
  | { data: GitData; error: null }
  | { data: null; error: string }

async function refreshGit(repos: string[]): Promise<GitData> {
  const results = await Promise.allSettled(
    repos.map(async (path) => {
      const output = await fetchAgentOutput('git_status', [path])
      return parseGitStatus(output)
    }),
  )
  const dirty = results.filter(
    (r) => r.status === 'fulfilled' && r.value.dirty,
  ).length
  return { dirty, total: repos.length }
}

export default function GitWidget({ initial, repos }: { initial: GitInitial; repos: string[] }) {
  const notConfigured = 'configured' in initial && initial.configured === false
  const [data, setData] = useState<GitData | null>(
    !notConfigured && 'data' in initial ? initial.data : null,
  )
  const [error, setError] = useState<string | null>(
    !notConfigured && 'error' in initial ? initial.error : null,
  )

  const refresh = useCallback(async () => {
    if (notConfigured || repos.length === 0) return
    try {
      const d = await refreshGit(repos)
      setData(d)
      setError(null)
    } catch (err) {
      setError(err instanceof Error ? err.message : 'refresh failed')
    }
  }, [notConfigured, repos])

  useEffect(() => {
    if (notConfigured) return
    const id = setInterval(refresh, 30_000)
    return () => clearInterval(id)
  }, [refresh, notConfigured])

  return (
    <Link href="/git" className="block rounded-lg border bg-card p-5 transition-colors hover:bg-accent">
      <h2 className="text-sm font-medium text-muted-foreground">Git</h2>
      {notConfigured ? (
        <p className="mt-2 text-sm text-muted-foreground">niet geconfigureerd</p>
      ) : error ? (
        <p className="mt-2 text-sm text-destructive truncate">{error}</p>
      ) : data ? (
        <p className="mt-2 text-2xl font-semibold">
          {data.dirty}
          <span className="text-sm font-normal text-muted-foreground">
            {' '}repo{data.dirty !== 1 ? 's' : ''} dirty
          </span>
        </p>
      ) : (
        <p className="mt-2 text-sm text-muted-foreground">—</p>
      )}
    </Link>
  )
}