/* eslint-disable @next/next/no-img-element */
import Head from "next/head";
import {withIronSessionSsr} from "iron-session/next";
import {sessionOptions} from "@/lib/session";
import {ToastContainer} from "react-toastify";
import Layout from "@/components/High/Layout";
import {GroupWithUsers, User} from "@/interfaces/user";
import {shouldRedirectHome} from "@/utils/navigation.disabled";
import {getUserName, isAdmin} from "@/utils/users";
import {convertToUsers, getGroupsForEntities} from "@/utils/groups.be";
import {getSpecificUsers} from "@/utils/users.be";
import Link from "next/link";
import {uniq} from "lodash";
import {BsPlus} from "react-icons/bs";
import CardList from "@/components/High/CardList";
import Separator from "@/components/Low/Separator";
import {mapBy, redirect, serialize} from "@/utils";
import { requestUser } from "@/utils/api";
import { findAllowedEntities } from "@/utils/permissions";
import { getEntities, getEntitiesWithRoles } from "@/utils/entities.be";
import { useAllowedEntities } from "@/hooks/useEntityPermissions";
import { EntityWithRoles } from "@/interfaces/entity";

export const getServerSideProps = withIronSessionSsr(async ({req, res}) => {
	const user = await requestUser(req, res)
	if (!user) return redirect("/login")

	if (shouldRedirectHome(user)) return redirect("/")

	const entityIDS = mapBy(user.entities, "id");
	const entities = await getEntitiesWithRoles(isAdmin(user) ? undefined : entityIDS)
	const allowedEntities = findAllowedEntities(user, entities, "view_classrooms")

	const groups = await getGroupsForEntities(mapBy(allowedEntities, 'id'));

	const users = await getSpecificUsers(uniq(groups.flatMap((g) => [...g.participants.slice(0, 5), g.admin])));
	const groupsWithUsers: GroupWithUsers[] = groups.map((g) => convertToUsers(g, users));

	return {
		props: serialize({user, groups: groupsWithUsers, entities: allowedEntities}),
	};
}, sessionOptions);

const SEARCH_FIELDS = [
	["name"],
	["admin", "name"],
	["admin", "email"],
	["admin", "corporateInformation", "companyInformation", "name"],
	["participants", "name"],
	["participants", "email"],
	["participants", "corporateInformation", "companyInformation", "name"],
];

interface Props {
	user: User;
	groups: GroupWithUsers[];
	entities: EntityWithRoles[]
}
export default function Home({user, groups, entities}: Props) {
	const entitiesAllowCreate = useAllowedEntities(user, entities, 'create_classroom')

	const renderCard = (group: GroupWithUsers) => (
		<Link
			href={`/classrooms/${group.id}`}
			key={group.id}
			className="p-4 border rounded-xl flex flex-col gap-2 hover:border-mti-purple transition ease-in-out duration-300 text-left cursor-pointer">
			<span>
				<b>Group: </b>
				{group.name}
			</span>
			<span>
				<b>Admin: </b>
				{getUserName(group.admin)}
			</span>
			<b>Participants ({group.participants.length}): </b>
			<span>
				{group.participants.slice(0, 5).map(getUserName).join(", ")}
				{group.participants.length > 5 ? <span className="opacity-60"> and {group.participants.length - 5} more</span> : ""}
			</span>
		</Link>
	);

	const firstCard = () => (
		<Link
			href={`/classrooms/create`}
			className="p-4 border hover:text-mti-purple rounded-xl flex flex-col items-center justify-center gap-0 hover:border-mti-purple transition ease-in-out duration-300 text-left cursor-pointer">
			<BsPlus size={40} />
			<span className="font-semibold">Create Group</span>
		</Link>
	);

	return (
		<>
			<Head>
				<title>Classrooms | 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 />
			<Layout user={user} className="!gap-4">
				<section className="flex flex-col gap-4 w-full h-full">
					<div className="flex flex-col gap-4">
						<h2 className="font-bold text-2xl">Classrooms</h2>
						<Separator />
					</div>

					<CardList<GroupWithUsers>
						list={groups}
						searchFields={SEARCH_FIELDS}
						renderCard={renderCard}
						firstCard={entitiesAllowCreate.length === 0 ? undefined : firstCard}
					/>
				</section>
			</Layout>
		</>
	);
}
