import { Box, Button, LinearProgress, Paper, Typography } from "@mui/material";
import { useQuestionsStore } from "@root/questions/store";
import {
    decrementCurrentQuestionIndex,
    incrementCurrentQuestionIndex,
    useQuizPreviewStore,
} from "@root/quizPreview";
import { AnyTypedQuizQuestion, UntypedQuizQuestion } from "model/questionTypes/shared";
import { useEffect } from "react";
import ArrowLeft from "../../assets/icons/questionsPage/arrowLeft";
import Date from "./QuizPreviewQuestionTypes/Date";
import Emoji from "./QuizPreviewQuestionTypes/Emoji";
import File from "./QuizPreviewQuestionTypes/File";
import Images from "./QuizPreviewQuestionTypes/Images";
import Number from "./QuizPreviewQuestionTypes/Number";
import Page from "./QuizPreviewQuestionTypes/Page";
import Rating from "./QuizPreviewQuestionTypes/Rating";
import Select from "./QuizPreviewQuestionTypes/Select";
import Text from "./QuizPreviewQuestionTypes/Text";
import Variant from "./QuizPreviewQuestionTypes/Variant";
import Varimg from "./QuizPreviewQuestionTypes/Varimg";
import { notReachable } from "../../utils/notReachable";


export default function QuizPreviewLayout() {
    const questions = useQuestionsStore(state => state.questions);
    const currentQuizStep = useQuizPreviewStore(
        (state) => state.currentQuestionIndex
    );

    const nonDeletedQuizQuestions = questions.filter(
        (question) => !question.deleted
    );
    const maxCurrentQuizStep =
        nonDeletedQuizQuestions.length > 0 ? nonDeletedQuizQuestions.length - 1 : 0;
    const currentProgress = Math.floor(
        (currentQuizStep / maxCurrentQuizStep) * 100
    );

    const currentQuestion = nonDeletedQuizQuestions[currentQuizStep];

    useEffect(
        function resetCurrentQuizStep() {
            if (currentQuizStep > maxCurrentQuizStep) {
                decrementCurrentQuestionIndex();
            }
        },
        [currentQuizStep, maxCurrentQuizStep]
    );

    return (
        <Paper
            className="quiz-preview-draghandle"
            data-cy="quiz-preview-layout"
            sx={{
                height: "100%",
                display: "flex",
                flexDirection: "column",
                flexGrow: 1,
                borderRadius: "12px",
                pointerEvents: "auto",
            }}
        >
            <Box
                sx={{
                    p: "16px",
                    whiteSpace: "break-spaces",
                    overflowY: "auto",
                    flexGrow: 1,
                    "&::-webkit-scrollbar": { width: 0 },
                }}
            >
                <QuestionPreviewComponent question={currentQuestion} />
            </Box>
            <Box
                sx={{
                    mt: "auto",
                    p: "16px",
                    display: "flex",
                    borderTop: "1px solid #E3E3E3",
                    alignItems: "center",
                }}
            >
                <Box
                    sx={{
                        flexGrow: 1,
                        display: "flex",
                        flexDirection: "column",
                        gap: 1,
                    }}
                >
                    <Typography>
                        {nonDeletedQuizQuestions.length > 0
                            ? `Вопрос ${currentQuizStep + 1} из ${nonDeletedQuizQuestions.length
                            }`
                            : "Нет вопросов"}
                    </Typography>
                    {nonDeletedQuizQuestions.length > 0 && (
                        <LinearProgress
                            variant="determinate"
                            value={currentProgress}
                            sx={{
                                "&.MuiLinearProgress-colorPrimary": {
                                    backgroundColor: "fadePurple.main",
                                },
                                "& .MuiLinearProgress-barColorPrimary": {
                                    backgroundColor: "brightPurple.main",
                                },
                            }}
                        />
                    )}
                </Box>
                <Box
                    sx={{
                        ml: 2,
                        display: "flex",
                        gap: 1,
                    }}
                >
                    <Button
                        variant="outlined"
                        onClick={decrementCurrentQuestionIndex}
                        disabled={currentQuizStep === 0}
                        sx={{ px: 1, minWidth: 0 }}
                    >
                        <ArrowLeft />
                    </Button>
                    <Button
                        variant="contained"
                        onClick={() => incrementCurrentQuestionIndex(maxCurrentQuizStep)}
                        disabled={currentQuizStep >= maxCurrentQuizStep}
                    >
                        Далее
                    </Button>
                </Box>
            </Box>
        </Paper>
    );
}

function QuestionPreviewComponent({ question }: {
    question: AnyTypedQuizQuestion | UntypedQuizQuestion;
}) {
    if (question.type === null) return null;

    switch (question.type) {
        case "variant": return <Variant question={question} />;
        case "images": return <Images question={question} />;
        case "varimg": return <Varimg question={question} />;
        case "emoji": return <Emoji question={question} />;
        case "text": return <Text question={question} />;
        case "select": return <Select question={question} />;
        case "date": return <Date question={question} />;
        case "number": return <Number question={question} />;
        case "file": return <File question={question} />;
        case "page": return <Page question={question} />;
        case "rating": return <Rating question={question} />;
        default: notReachable(question);
    }
}