import { useEffect, useState } from 'react'
import ipfsClient from 'ipfs-http-client'
import { parseHTML } from '../utils'

let ipfs: any = null
let ipfsVersion = ''

export interface IpfsConfig {
  protocol: string
  host: string
  port: string
}

export default function useIpfsApi(config: IpfsConfig) {
  const [isIpfsReady, setIpfsReady] = useState(Boolean(ipfs))
  const [ipfsError, setIpfsError] = useState('')

  useEffect(() => {
    async function initIpfs() {
      if (ipfs !== null) return
      // eslint-disable-next-line
      ipfs = await ipfsClient(config)

      try {
        const version = await ipfs.version()
        ipfsVersion = version.version
      } catch (error) {
        let { message } = error

        if (!error.status) {
          const htmlData = parseHTML(error)
          message = htmlData.item(0)
          message = message.textContent
        }

        setIpfsError(`IPFS connection error: ${message}`)
        setIpfsReady(false)
        return
      }
      setIpfsReady(Boolean(await ipfs.id()))
    }

    initIpfs()
  }, [config])

  useEffect(() => {
    // just like componentWillUnmount()
    return function cleanup() {
      if (ipfs) {
        setIpfsReady(false)
        ipfs = null
        ipfsVersion = ''
        setIpfsError('')
      }
    }
  }, [])

  return { ipfs, ipfsVersion, isIpfsReady, ipfsError }
}