import React, { useState, useEffect, useRef } from "react";
import { useSearchParams, useParams } from "react-router-dom";
import "./style.css";
import ChatBox from "./ChatBox.js";
import FeedbackForm from "./FeedbackForm.js";

const ChatPage = () => {
  const [needForm, setNeedForm] = useState(false);
  
  //const { token } = useParams();
  const backendUrl = '/api';
  const [searchParams, setSearchParams] = useSearchParams();
  const token = searchParams.get("gcube-token") || '';
  const [messages, setMessages] = useState([]);
  const tick = useRef() 
  const [timer, setTimer] = useState(0);
  const [stat, setStat] = useState("start");
  const [err, setErr] = useState("");
  
  const version = process.env.REACT_APP_VERSION_INFO;
  if (!version) {
    console.info("No version information present at build time.");
  }else{console.info('version: ${version}');}
  

  useEffect(() => {
     if (stat === "waiting"){
	let x = "set"
	fetch(backendUrl + '/dm', {
            method: 'POST',
            body: JSON.stringify({stat: x, token: token }),
            mode: 'cors',
            headers: {
           'Content-Type': 'application/json'
           },
         }).then(r => r.json()).then(r => {
           setStat(r.stat);
           setErr(r.err);
           }).catch((error) => {
             console.error('Error:', error);
           });
     }
       if (stat==="start"){
         tick.current = setInterval(() => {  
           setTimer((timer) => timer + 1);
         }, 1000);
         
         if(timer%30 == 0){
            fetch(backendUrl + '/dm', {
            method: 'POST',
            body: JSON.stringify({ stat: stat, token: token }),
            mode: 'cors',
            headers: {
           'Content-Type': 'application/json'
           },
           }).then(r => r.json()).then(r => {
           setStat(r.stat);
           setErr(r.err);
           }).catch((error) => {
             console.error('Error:', error);
           });
           setTimer((timer) => 0);
           clearInterval(tick.current);
         }
     } 

     return () => clearInterval(tick.current);
   }, [stat, timer]);
 
  function updateNeedForm(value) {
    setNeedForm(value);
  }

 
  function updateMessages(msg) {
    setMessages((prevMessages) => [msg, ...prevMessages]);
  }
  return (
    <div>
  {stat==="waiting" &&  <p>Loading resources + {token} ...</p>}
  {stat==="start" &&  <p>Connecting to Server + {token} ...</p>}
  {stat==="rejected" &&  <p>Unauthorized Use + {token} ...</p>}
  {stat==="init_dm_error" && <p> {err} + {token} </p>}

  {stat==="done" && <ChatBox props={{ updateNeedForm, messages, updateMessages,  token}} /> }
  {stat==="done" && needForm && <FeedbackForm props={{ updateNeedForm, messages }} /> }
    </div>
  );
};

export default ChatPage;