/* eslint-disable @next/next/no-img-element */
import Head from "next/head";
import {withIronSessionSsr} from "iron-session/next";
import {sessionOptions} from "@/lib/session";
import useUser from "@/hooks/useUser";
import {toast, ToastContainer} from "react-toastify";
import Layout from "@/components/High/Layout";
import {RadioGroup} from "@headlessui/react";
import {MODULE_ARRAY} from "@/utils/moduleUtils";
import clsx from "clsx";
import {capitalize} from "lodash";
import {FormEvent, useState} from "react";
import {Module} from "@/interfaces";
import Input from "@/components/Low/Input";
import Button from "@/components/Low/Button";
import {getExamById} from "@/utils/exams";
import useExamStore from "@/stores/examStore";
import {useRouter} from "next/router";
import ShortUniqueId from "short-unique-id";
import {Type} from "@/interfaces/user";
import axios from "axios";

export const getServerSideProps = withIronSessionSsr(({req, res}) => {
	const user = req.session.user;

	if (!user || !user.isVerified) {
		res.setHeader("location", "/login");
		res.statusCode = 302;
		res.end();
		return {
			props: {
				user: null,
			},
		};
	}

	if (user.type !== "developer") {
		res.setHeader("location", "/");
		res.statusCode = 302;
		res.end();
		return {
			props: {
				user: null,
			},
		};
	}

	return {
		props: {user: req.session.user},
	};
}, sessionOptions);

const ExamLoader = () => {
	const [selectedModule, setSelectedModule] = useState<Module>();
	const [examId, setExamId] = useState<string>();
	const [isLoading, setIsLoading] = useState(false);

	const setExams = useExamStore((state) => state.setExams);
	const setSelectedModules = useExamStore((state) => state.setSelectedModules);

	const router = useRouter();

	const loadExam = async (e?: FormEvent) => {
		if (e) e.preventDefault();
		setIsLoading(true);

		if (selectedModule && examId) {
			const exam = await getExamById(selectedModule, examId.trim());
			if (!exam) {
				toast.error("Unknown Exam ID! Please make sure you selected the right module and entered the right exam ID", {
					toastId: "invalid-exam-id",
				});

				setIsLoading(false);
				return;
			}

			setExams([exam]);
			setSelectedModules([selectedModule]);

			router.push("/exercises");
		}

		setIsLoading(false);
	};

	return (
		<div className="flex flex-col gap-4 border p-4 border-mti-gray-platinum rounded-xl">
			<label className="font-normal text-base text-mti-gray-dim">Exam Loader</label>
			<form className="flex flex-col gap-4 w-full" onSubmit={loadExam}>
				<RadioGroup value={selectedModule} onChange={setSelectedModule} className="grid grid-cols-2 items-center gap-4 place-items-center">
					{MODULE_ARRAY.map((module) => (
						<RadioGroup.Option value={module} key={module}>
							{({checked}) => (
								<span
									className={clsx(
										"px-6 py-4 w-48 flex justify-center text-sm font-normal rounded-full border focus:outline-none cursor-pointer",
										"hover:bg-mti-purple-light hover:border-mti-purple-dark hover:text-white",
										"transition duration-300 ease-in-out",
										!checked ? "bg-white border-mti-gray-platinum" : "bg-mti-purple-light border-mti-purple-dark text-white",
									)}>
									{capitalize(module)}
								</span>
							)}
						</RadioGroup.Option>
					))}
				</RadioGroup>
				<Input type="text" name="examId" onChange={setExamId} placeholder="Exam ID" />
				<Button disabled={!selectedModule || !examId} isLoading={isLoading}>
					Load Exam
				</Button>
			</form>
		</div>
	);
};

const CodeGenerator = () => {
	const [generatedCode, setGeneratedCode] = useState<string>();

	const generateCode = (type: Type) => {
		const uid = new ShortUniqueId();
		const code = uid.randomUUID(6);

		axios
			.post("/api/code", {type, code})
			.then(({data, status}) => {
				if (data.ok) {
					toast.success(`Successfully generated a ${capitalize(type)} code!`, {toastId: "success"});
					setGeneratedCode(code);
					return;
				}

				if (status === 403) {
					toast.error(`You do not have permission to generate a ${capitalize(type)} code!`, {toastId: "forbidden"});
				}
			})
			.catch(({response: {status}}) => {
				if (status === 403) {
					toast.error(`You do not have permission to generate a ${capitalize(type)} code!`, {toastId: "forbidden"});
					return;
				}

				toast.error(`Something went wrong, please try again later!`, {toastId: "error"});
			});
	};

	return (
		<div className="flex flex-col gap-4 border p-4 border-mti-gray-platinum rounded-xl">
			<label className="font-normal text-base text-mti-gray-dim">User Code Generator</label>
			<div className="grid grid-cols-2 gap-4">
				<Button className="w-48" variant="outline" onClick={() => generateCode("student")}>
					Student
				</Button>
				<Button className="w-48" variant="outline" onClick={() => generateCode("teacher")}>
					Teacher
				</Button>
				<Button className="w-48" variant="outline" onClick={() => generateCode("admin")}>
					Admin
				</Button>
				<Button className="w-48" variant="outline" onClick={() => generateCode("owner")}>
					Owner
				</Button>
			</div>
			<label className="font-normal text-base text-mti-gray-dim">Generated Code:</label>
			<div
				className={clsx(
					"p-6 w-full min-h-[70px] flex justify-center text-sm font-normal rounded-full border focus:outline-none cursor-pointer",
					"hover:border-mti-purple tooltip",
					"transition duration-300 ease-in-out",
				)}
				data-tip="Click to copy"
				onClick={() => {
					if (generatedCode) navigator.clipboard.writeText(generatedCode);
				}}>
				{generatedCode}
			</div>
			{generatedCode && <span className="text-sm text-mti-gray-dim font-light">Give this code to the user to complete their registration</span>}
		</div>
	);
};

export default function Admin() {
	const {user} = useUser({redirectTo: "/login"});

	return (
		<>
			<Head>
				<title>Admin Panel | EnCoach</title>
				<meta
					name="description"
					content="A training platform for the IELTS exam provided by the Muscat Training Institute and developed by eCrop."
				/>
				<meta name="viewport" content="width=device-width, initial-scale=1" />
				<link rel="icon" href="/favicon.ico" />
			</Head>
			<ToastContainer />
			{user && (
				<Layout user={user}>
					<section className="w-full flex gap-8">
						<ExamLoader />
						<CodeGenerator />
					</section>
				</Layout>
			)}
		</>
	);
}
