import React, {useEffect} from 'react'
import {useHistory} from "react-router"
import {CodeSnippetlighter} from '../../../pages/CodeSnippetPage'
import './quiz.scss'
import {useDispatch} from 'react-redux'
import {useState} from 'react'
import {
   fetchGetAnswers,
   selectAnswer,
   selectedTest
} from '../../../redux/quizSlice'
import {useSelector} from 'react-redux'
import {Progressbar} from './ProgressbarQuiz'
import {fetchUserAnswersMany, fetchUserAnswerOne} from './../../../redux/quizSlice'
import {GetOptionTask} from './GetOptionTask'
import {fetchGet} from "../../../server/server";


export const TaskQuiz = () => {

   const history = useHistory();
   const dispatch = useDispatch()
   const listAnswers = useSelector(selectAnswer)
   const dataTest = useSelector(selectedTest)
   const [index, setIndex] = useState(0);
   const [checkedValues, setCheckedValues] = useState([])
   const [stripValue, setStripValue] = useState(0);
   const [inputValue, setInputValue] = useState('')
   const id = localStorage.getItem('id');
   const [questions, setQuestions] = useState([])

   useEffect(async () => {
      const response = await fetchGet({
           link: `${process.env.REACT_APP_API_URL}/api/question/get-questions?uuid=${dataTest.uuid}`,
           Origin: `${process.env.REACT_APP_BASE_URL}`,
        }
      )
      setQuestions(response)
      dispatch(fetchGetAnswers(response[0].id))
      setStripValue((+index + 1) * 100 / response.length)
   }, [dispatch])


   const nextQuestion = async (e) => {
      e.preventDefault()

      //Проверка на валидацию ответов
      if (checkedValues.length || inputValue) {
         switch (questions[index].question_type_id) {
            case '3':
               await dispatch(fetchUserAnswersMany(checkedValues))
               break;
            case '2':
            case '1':
            case '4':
               await dispatch(fetchUserAnswerOne(checkedValues))
               break;
            default:
               break;
         }

         //Проверка на существование следующего запроса
         if (index < questions.length - 1) {
            await dispatch(fetchGetAnswers(questions[index + 1].id))
            setIndex(prev => prev >= questions.length - 1 ? prev : prev + 1)
            setStripValue((prev => prev + (100 / questions.length)))
            setCheckedValues([]);
            setInputValue('')
         } else {
            history.push(`/quiz-result`)
            alert("Тест пройден!")
         }

      } else {
         alert("Вы не ответили на вопрос")
      }
   }

   const handleChange = (e) => {
      const checked = e.target.checked;
      switch (questions[index].question_type_id) {
         case '3':
            checked ? setCheckedValues(prev => [...prev, {
                 user_id: id,
                 user_questionnaire_uuid: dataTest.uuid,
                 question_id: questions[index].id,
                 response_body: e.target.value
              }]) :
              setCheckedValues(prev => [...prev.filter(item => item.response_body !== e.target.value)])
            break
         case '1':
         case '2':
         case '4':
            setCheckedValues([{
               user_id: id,
               user_questionnaire_uuid: dataTest.uuid,
               question_id: questions[index].id,
               response_body: e.target.value
            }])
      }
   };


   return (
     <React.StrictMode>
        <Progressbar indexQuestion={index + 1} width={stripValue}/>
        <div className="task">
           {!questions.length || !stripValue || !listAnswers.length ?
             <h1 className={'_container'} style={{display: "block"}}>Loading....</h1>
             :
             <div className="task__container">
                <div className="task__code code">
                   {/* <CodeSnippetlighter /> */}
                </div>
                <h3 className="task__title quiz-title_h3">{questions[index].question_body}</h3>
                <div className="task__body">
                   <form className='task__form form-task'>
                      {
                         questions[index].question_type_id === 1 ?
                           <GetOptionTask
                             type={1}
                             inputValue={checkedValues.length ? checkedValues[0].response_body : ''}
                             handleChange={handleChange}
                           />
                           :
                           listAnswers.map((answer) => (
                             <GetOptionTask
                               key={answer.id}
                               type={questions[index].question_type_id}
                               handleChange={handleChange}
                               answer={answer}
                             />
                           ))
                      }
                      <div className="form-task__buttons">
                         {questions.length !== index + 1 &&
                         <button type='submit' className='quiz-btn'
                                 onClick={(e) => nextQuestion(e)}>Далее</button>}
                         {questions.length === index + 1 && <button onClick={(e) => nextQuestion(e)}
                                                                    className='quiz-btn quiz-btn_dark-green'>Завершить</button>}
                      </div>
                   </form>
                </div>
             </div>
           }
        </div>
     </React.StrictMode>
   )
}