import { sendAnswer } from "@api/quizRelase";
import { useQuizData } from "@contexts/QuizDataContext";
import { ThemeProvider } from "@mui/material";
import { useQuizViewStore } from "@stores/quizView";
import { useQuestionFlowControl } from "@utils/hooks/useQuestionFlowControl";
import { notReachable } from "@utils/notReachable";
import { quizThemes } from "@utils/themes/Publication/themePublication";
import { enqueueSnackbar } from "notistack";
import { ReactElement, useEffect } from "react";
import { ContactForm } from "./ContactForm";
import { Question } from "./Question";
import { ResultForm } from "./ResultForm";
import { StartPageViewPublication } from "./StartPageViewPublication";
import NextButton from "./tools/NextButton";
import PrevButton from "./tools/PrevButton";

export default function ViewPublicationPage() {
    const { settings, recentlyCompleted, quizId, preview } = useQuizData();
    const answers = useQuizViewStore(state => state.answers);
    let currentQuizStep = useQuizViewStore((state) => state.currentQuizStep);
    const {
        currentQuestion,
        currentQuestionStepNumber,
        isNextButtonEnabled,
        isPreviousButtonEnabled,
        moveToPrevQuestion,
        moveToNextQuestion,
        showResultAfterContactForm,
    } = useQuestionFlowControl();

    const isAnswer = answers.some(ans => ans.questionId === currentQuestion.id);

    useEffect(
        function setFaviconAndTitle() {
            const link = document.querySelector('link[rel="icon"]');
            if (link && settings.cfg.startpage.favIcon) {
                link.setAttribute("href", settings.cfg.startpage.favIcon);
            }

            document.title = settings.name;
        },
        [settings]
    );

    if (recentlyCompleted) throw new Error("Quiz already completed");
    if (currentQuizStep === "startpage" && settings.cfg.noStartPage)
        currentQuizStep = "question";

    let quizStepElement: ReactElement;
    switch (currentQuizStep) {
        case "startpage": {
            quizStepElement = <StartPageViewPublication />;
            break;
        }
        case "question": {
            if (currentQuestion.type === "result") {
                quizStepElement = <ResultForm resultQuestion={currentQuestion} />;
                break;
            }

            quizStepElement = (
                <Question
                    currentQuestion={currentQuestion}
                    currentQuestionStepNumber={currentQuestionStepNumber}
                    prevButton={<PrevButton isPreviousButtonEnabled={isPreviousButtonEnabled} moveToPrevQuestion={moveToPrevQuestion} />}
                    nextButton={
                        <NextButton
                            isNextButtonEnabled={isNextButtonEnabled}
                            moveToNextQuestion={async () => {
                                if (!isAnswer) {
                                    try {
                                        await sendAnswer({
                                            questionId: currentQuestion.id,
                                            body: "",
                                            qid: quizId,
                                            preview
                                        });
                                    } catch (e) {
                                        enqueueSnackbar("ответ не был засчитан");
                                    }
                                }
                                moveToNextQuestion();
                            }}
                        />}
                />
            );
            break;
        }
        case "contactform": {
            quizStepElement = (
                <ContactForm
                    currentQuestion={currentQuestion}
                    onShowResult={showResultAfterContactForm}
                />
            );
            break;
        }
        default:
            notReachable(currentQuizStep);
    }

    return (
        <ThemeProvider
            theme={quizThemes[settings.cfg.theme || "StandardTheme"].theme}
        >
            {quizStepElement}
        </ThemeProvider>
    );
}