'use client'

import { useCallback, useEffect, useState } from 'react'
import Link from 'next/link'
import { apiFetch } from '@/lib/csrf'
import { relativeTime } from '@/lib/utils'

type LatestRun = { id: string; flow_key: string; status: string; started_at: string }
export type AuditInitial =
  | { data: LatestRun | null; error: null }
  | { data: null; error: string }

const STATUS_STYLES: Record<string, string> = {
  pending: 'bg-zinc-100 text-zinc-600 dark:bg-zinc-800 dark:text-zinc-400',
  running: 'bg-amber-100 text-amber-700 dark:bg-amber-900/30 dark:text-amber-400',
  success: 'bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-400',
  failed: 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400',
  cancelled: 'bg-zinc-100 text-zinc-600 dark:bg-zinc-800 dark:text-zinc-400',
}

async function fetchLatestRun(): Promise<LatestRun | null> {
  const res = await apiFetch('/api/audit/latest')
  if (!res.ok) throw new Error(`${res.status}`)
  const json = (await res.json()) as { run: LatestRun | null }
  return json.run
}

export default function AuditWidget({ initial }: { initial: AuditInitial }) {
  const [data, setData] = useState<LatestRun | null>(initial.data)
  const [error, setError] = useState<string | null>(initial.error)

  const refresh = useCallback(async () => {
    try {
      const run = await fetchLatestRun()
      setData(run)
      setError(null)
    } catch (err) {
      setError(err instanceof Error ? err.message : 'refresh failed')
    }
  }, [])

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

  return (
    <Link href="/audit" className="block rounded-lg border bg-card p-5 transition-colors hover:bg-accent">
      <h2 className="text-sm font-medium text-muted-foreground">Audit</h2>
      {error ? (
        <p className="mt-2 text-sm text-destructive truncate">{error}</p>
      ) : data ? (
        <div className="mt-2 space-y-1">
          <div className="flex items-center gap-2">
            <span
              className={`inline-flex items-center rounded-full px-2 py-0.5 text-xs font-medium ${STATUS_STYLES[data.status] ?? ''}`}
            >
              {data.status}
            </span>
            <span className="text-xs text-muted-foreground">{relativeTime(new Date(data.started_at))}</span>
          </div>
          <p className="font-mono text-xs text-muted-foreground truncate">{data.flow_key}</p>
        </div>
      ) : (
        <p className="mt-2 text-sm text-muted-foreground">geen runs</p>
      )}
    </Link>
  )
}