import { workerConfig } from "@/uptime.config"
import { MonitorState } from "@/uptime.types"
import { NextRequest } from "next/server"

export const runtime = 'edge'

export default async function handler(req: NextRequest): Promise<Response> {

  const { UPTIMEFLARE_STATE } = process.env as unknown as {
    UPTIMEFLARE_STATE: KVNamespace
  }

  const stateStr = await UPTIMEFLARE_STATE?.get('state')
  if (!stateStr) {
    return new Response(JSON.stringify({ error: 'No data available' }), {
      status: 500,
      headers: {
        'Content-Type': 'application/json'
      }
    })
  }
  const state = (JSON.parse(stateStr)) as unknown as MonitorState

  let monitors: any = {}

  for (let monitor of workerConfig.monitors) {
    const isUp = state.incident[monitor.id].slice(-1)[0].end !== undefined
    monitors[monitor.id] = {
      up: isUp,
      latency: state.latency[monitor.id].recent.slice(-1)[0].ping,
      location: state.latency[monitor.id].recent.slice(-1)[0].loc,
      message: isUp ? "OK" : state.incident[monitor.id].slice(-1)[0].error.slice(-1)[0]
    }
  }

  let ret = {
    up: state.overallUp,
    down: state.overallDown,
    updatedAt: state.lastUpdate,
    monitors: monitors
  }

  return new Response(JSON.stringify(ret), {
    headers: {
      'Content-Type': 'application/json'
    }
  })
}