import axios from 'axios'
import { assertSuccessJsonResponse } from '../../assertSuccessJsonResponse'
import { z } from 'zod'
import { getDefaultTimeoutMilliseconds } from '../../getDefaultTimeoutMilliseconds'
import { NodeProviderMethod } from '../NodeProviderMethod'
import { NoMoreNodesError } from '../NoMoreNodesError'

const limit = 100

const schema = z.array(
  z.object({
    host: z.string()
  })
)

export const retrieveInstancesPage:NodeProviderMethod = async (domain, page) => {
  const response = await axios.post('https://' + domain + '/api/federation/instances', {
    host: null,
    blocked: null,
    notResponding: null,
    suspended: null,
    federating: null,
    subscribing: null,
    publishing: null,
    limit: limit,
    offset: page * limit,
    sort: '+id'
  }, {
    timeout: getDefaultTimeoutMilliseconds()
  })
  assertSuccessJsonResponse(response)
  const responseData = schema.parse(response.data)
  if (responseData.length === 0) {
    throw new NoMoreNodesError('instance')
  }
  return responseData.map(
    item => {
      return item.host
    }
  )
}