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6956 stevensc 1 
import { useEffect, useState } from 'react'
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import { axios } from '../utils'
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const useMessages = (messagesUrl) => {
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  const [oldMessages, setOldMessages] = useState([])
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  const [messages, setMessages] = useState([])
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  const [currentPage, setCurrentPage] = useState(1)
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  const [pages, setPages] = useState(1)
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  const [loading, setLoading] = useState(false)
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  const [loadingOld, setLoadingOld] = useState(false)
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  const getMessages = async () => {
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    setLoading(true)
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    axios
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      .get(messagesUrl)
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      .then(({ data: response }) => {
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        const { data, success, pagination } = response
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        if (!success) {
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          return
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        }
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        const resMessages = data.items ? [...data.items] : [...data]
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        const lastPage = pagination ? pagination.last : data.pages
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        const newMessages = resMessages.reduce((acum, newMessage) => {
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          const messageIndex = newMessage.id
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            ? messages.findIndex(({ id }) => id === newMessage.id)
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            : messages.findIndex(({ uuid }) => uuid === newMessage.uuid)
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          if (messageIndex === -1) {
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            acum = [...acum, newMessage]
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          }
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          return acum
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        }, [])
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        if (!newMessages.length) {
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          return
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        }
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        setMessages((prevMessages) => [...newMessages, ...prevMessages])
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        setPages(lastPage)
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      })
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      .finally(() => setLoading(false))
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  }
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  const loadOldMessages = () => {
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    setLoadingOld(true)
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    axios
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      .get(`${messagesUrl}?page=${currentPage}`)
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      .then(({ data: response }) => {
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        const { data, success } = response
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        if (success && data.page > 1) {
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          setOldMessages([...oldMessages, ...data.items.slice()])
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        }
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      })
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      .finally(() => setLoadingOld(false))
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  }
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  const onIntersection = (entities) => {
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    const target = entities[0]
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    if (
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      !target.isIntersecting ||
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      currentPage >= pages ||
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      loadingOld ||
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      !pages
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    ) {
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      return
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    }
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    setCurrentPage((prevState) => prevState + 1)
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    loadOldMessages()
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  }
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  const reset = () => {
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    setMessages([])
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    setOldMessages([])
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    setCurrentPage(1)
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    setPages(1)
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  }
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  useEffect(() => {
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    if (loading || !messagesUrl) return
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    const messagesInterval = setTimeout(() => {
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      getMessages()
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    }, 2000)
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    return () => {
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      clearTimeout(messagesInterval)
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    }
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  }, [loading, messagesUrl])
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  return {
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    messages: [...messages, ...oldMessages],
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    loading: loadingOld,
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    loadMore: onIntersection,
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    reset,
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  }
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}
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export default useMessages