encoach_frontend/src/components/Exercises/Writing.tsx

/* eslint-disable @next/next/no-img-element */
import { WritingExercise } from "@/interfaces/exam";
import { CommonProps } from ".";
import React, { Fragment, useEffect, useRef, useState } from "react";
import { toast } from "react-toastify";
import Button from "../Low/Button";
import { Dialog, Transition } from "@headlessui/react";
import useExamStore from "@/stores/examStore";

export default function Writing({
	id,
	prompt,
	prefix,
	suffix,
	type,
	wordCounter,
	attachment,
	userSolutions,
	isPractice = false,
	onNext,
	onBack,
	enableNavigation = false
}: WritingExercise & CommonProps) {
	const [isModalOpen, setIsModalOpen] = useState(false);
	const [inputText, setInputText] = useState(userSolutions.length === 1 ? userSolutions[0].solution : "");
	const [isSubmitEnabled, setIsSubmitEnabled] = useState(false);
	const [saveTimer, setSaveTimer] = useState(0);

	const { userSolutions: storeUserSolutions, setUserSolutions } = useExamStore((state) => state);
	const hasExamEnded = useExamStore((state) => state.hasExamEnded);

	useEffect(() => {
		const saveTimerInterval = setInterval(() => {
			setSaveTimer((prev) => prev + 1);
		}, 1000);

		return () => {
			clearInterval(saveTimerInterval);
		};
	}, []);

	useEffect(() => {
		if (inputText.length > 0 && saveTimer % 10 === 0) {
			setUserSolutions([
				...storeUserSolutions.filter((x) => x.exercise !== id),
				{ exercise: id, solutions: [{ id, solution: inputText }], score: { correct: 100, total: 100, missing: 0 }, type, module: "writing" },
			]);
		}
		// eslint-disable-next-line react-hooks/exhaustive-deps
	}, [saveTimer]);

	useEffect(() => {
		if (localStorage.getItem("enable_paste")) return;

		const listener = (e: KeyboardEvent) => {
			if ((e.ctrlKey || e.metaKey) && e.key === "v") {
				e.preventDefault();
			}
		};

		document.addEventListener("keydown", listener);

		return () => {
			document.removeEventListener("keydown", listener);
		};
	}, []);

	useEffect(() => {
		if (hasExamEnded)
			onNext({ exercise: id, solutions: [{ id, solution: inputText }], score: { correct: 100, total: 100, missing: 0 }, type, module: "writing", isPractice });
		// eslint-disable-next-line react-hooks/exhaustive-deps
	}, [hasExamEnded]);

	useEffect(() => {
		const words = inputText.split(" ").filter((x) => x !== "");

		if (wordCounter.type === "min") {
			setIsSubmitEnabled(wordCounter.limit <= words.length || enableNavigation);
		} else {
			setIsSubmitEnabled(true);
			if (wordCounter.limit < words.length) {
				toast.warning(`You have reached your word limit of ${wordCounter.limit} words!`, { toastId: "word-limit" });
				setInputText(words.slice(0, words.length - 1).join(" "));
			}
		}
	}, [enableNavigation, inputText, wordCounter]);

	return (
		<div className="flex flex-col gap-4 mt-4">
			<div className="flex justify-between w-full gap-8">
				<Button
					color="purple"
					variant="outline"
					onClick={() =>
						onBack({ exercise: id, solutions: [{ id, solution: inputText }], score: { correct: 100, total: 100, missing: 0 }, type, isPractice })
					}
					className="max-w-[200px] self-end w-full">
					Back
				</Button>
				<Button
					color="purple"
					disabled={!isSubmitEnabled}
					onClick={() =>
						onNext({
							exercise: id,
							solutions: [{ id, solution: inputText.replaceAll(/\s{2,}/g, " ") }],
							score: { correct: 100, total: 100, missing: 0 },
							type,
							module: "writing", isPractice
						})
					}
					className="max-w-[200px] self-end w-full">
					Next
				</Button>
			</div>

			{attachment && (
				<Transition show={isModalOpen} as={Fragment}>
					<Dialog onClose={() => setIsModalOpen(false)} className="relative z-50">
						<Transition.Child
							as={Fragment}
							enter="ease-out duration-300"
							enterFrom="opacity-0"
							enterTo="opacity-100"
							leave="ease-in duration-200"
							leaveFrom="opacity-100"
							leaveTo="opacity-0">
							<div className="fixed inset-0 bg-black/30" />
						</Transition.Child>

						<Transition.Child
							as={Fragment}
							enter="ease-out duration-300"
							enterFrom="opacity-0 scale-95"
							enterTo="opacity-100 scale-100"
							leave="ease-in duration-200"
							leaveFrom="opacity-100 scale-100"
							leaveTo="opacity-0 scale-95">
							<div className="fixed inset-0 flex items-center justify-center p-4">
								<Dialog.Panel className="w-fit h-fit rounded-xl bg-white">
									<img src={attachment.url} alt={attachment.description} className="max-w-4xl w-full self-center rounded-xl p-4" />
								</Dialog.Panel>
							</div>
						</Transition.Child>
					</Dialog>
				</Transition>
			)}
			<div className="flex flex-col h-full w-full gap-9 mb-20">
				<div className="flex flex-col w-full gap-7 bg-mti-gray-smoke rounded-xl py-8 pb-12 px-16">
					<span className="whitespace-pre-wrap">{prefix.replaceAll("\\n", "\n")}</span>
					<span className="font-semibold whitespace-pre-wrap">{prompt.replaceAll("\\n", "\n")}</span>
					{attachment && (
						<img
							onClick={() => setIsModalOpen(true)}
							src={attachment.url}
							alt={attachment.description}
							className="max-w-md self-center rounded-xl cursor-pointer"
						/>
					)}
				</div>

				<div className="w-full h-full flex flex-col gap-4">
					<span className="whitespace-pre-wrap">{suffix}</span>
					<textarea
						onContextMenu={(e) => e.preventDefault()}
						className="w-full h-full min-h-[300px] cursor-text px-7 py-8 input border-2 border-mti-gray-platinum bg-white rounded-3xl"
						onChange={(e) => setInputText(e.target.value)}
						value={inputText}
						placeholder="Write your text here..."
						spellCheck={false}
					/>
					<span className="text-base self-end text-mti-gray-cool">Word Count: {inputText.split(" ").filter((x) => x !== "").length}</span>
				</div>
			</div>

			<div className="self-end flex justify-between w-full gap-8 absolute bottom-8 left-0 px-8">
				<Button
					color="purple"
					variant="outline"
					onClick={() =>
						onBack({ exercise: id, solutions: [{ id, solution: inputText }], score: { correct: 100, total: 100, missing: 0 }, type, isPractice })
					}
					className="max-w-[200px] self-end w-full">
					Back
				</Button>
				<Button
					color="purple"
					disabled={!isSubmitEnabled}
					onClick={() =>
						onNext({
							exercise: id,
							solutions: [{ id, solution: inputText.replaceAll(/\s{2,}/g, " ") }],
							score: { correct: 100, total: 100, missing: 0 },
							type,
							module: "writing", isPractice
						})
					}
					className="max-w-[200px] self-end w-full">
					Next
				</Button>
			</div>
		</div>
	);
}