import {renderExercise} from "@/components/Exercises";
import {renderSolution} from "@/components/Solutions";
import {infoButtonStyle} from "@/constants/buttonStyles";
import {UserSolution, WritingExam} from "@/interfaces/exam";
import {mdiArrowRight} from "@mdi/js";
import Icon from "@mdi/react";
import clsx from "clsx";
import {Fragment, useEffect, useState} from "react";
import {toast} from "react-toastify";

interface Props {
	exam: WritingExam;
	showSolutions?: boolean;
	onFinish: (userSolutions: UserSolution[]) => void;
}

export default function Writing({exam, showSolutions = false, onFinish}: Props) {
	const [exerciseIndex, setExerciseIndex] = useState(0);
	const [timer, setTimer] = useState<number>();
	const [userSolutions, setUserSolutions] = useState<UserSolution[]>([]);

	useEffect(() => {
		setTimer(exam.minTimer * 60);
		const timerInterval = setInterval(() => setTimer((prev) => prev && prev - 1), 1000);

		return () => {
			clearInterval(timerInterval);
		};
	}, [exam.minTimer]);

	const nextExercise = (solution?: UserSolution) => {
		if (solution) {
			setUserSolutions((prev) => [...prev.filter((x) => x.id !== solution.id), solution]);
		}

		if (exerciseIndex + 1 < exam.exercises.length) {
			setExerciseIndex((prev) => prev + 1);
			return;
		}

		if (solution) {
			onFinish([...userSolutions.filter((x) => x.id !== solution.id), solution].map((x) => ({...x, module: "writing", exam: exam.id})));
		} else {
			onFinish(userSolutions.map((x) => ({...x, module: "writing", exam: exam.id})));
		}
	};

	const previousExercise = () => {
		setExerciseIndex((prev) => prev - 1);
	};

	return (
		<div className="w-full h-full relative flex flex-col gap-8 items-center justify-center p-8 px-16 overflow-hidden">
			{timer && (
				<div className="absolute w-24 top-8 text-center right-8 font-semibold text-lg border-ielts-writing border-2 p-2 rounded-xl bg-ielts-writing-transparent text-white">
					{Math.floor(timer / 60) < 10 ? "0" : ""}
					{Math.floor(timer / 60)}:{timer % 60 < 10 ? "0" : ""}
					{timer % 60}
				</div>
			)}
			{exerciseIndex > -1 &&
				exerciseIndex < exam.exercises.length &&
				!showSolutions &&
				renderExercise(exam.exercises[exerciseIndex], nextExercise, previousExercise)}
			{exerciseIndex > -1 &&
				exerciseIndex < exam.exercises.length &&
				showSolutions &&
				renderSolution(exam.exercises[exerciseIndex], nextExercise, previousExercise)}
			{exerciseIndex === -1 && (
				<button className={clsx("btn btn-wide gap-4 relative text-white self-end", infoButtonStyle)} onClick={() => nextExercise()}>
					Next
					<div className="absolute right-4">
						<Icon path={mdiArrowRight} color="white" size={1} />
					</div>
				</button>
			)}
		</div>
	);
}
