/* eslint-disable @next/next/no-img-element */
import Layout from "@/components/High/Layout";
import UserDisplayList from "@/components/UserDisplayList";
import IconCard from "@/components/IconCard";
import { EntityWithRoles } from "@/interfaces/entity";
import { Assignment } from "@/interfaces/results";
import { Group, Stat, Type, User } from "@/interfaces/user";
import { sessionOptions } from "@/lib/session";
import { dateSorter, filterBy, mapBy, redirect, serialize } from "@/utils";
import { requestUser } from "@/utils/api";
import { countEntitiesAssignments, getAssignments } from "@/utils/assignments.be";
import { getEntitiesWithRoles } from "@/utils/entities.be";
import { countGroups, getGroups } from "@/utils/groups.be";
import { checkAccess } from "@/utils/permissions";
import { calculateAverageLevel, calculateBandScore } from "@/utils/score";
import { groupByExam } from "@/utils/stats";
import { getStatsByUsers } from "@/utils/stats.be";
import { countUsers, getUser, getUsers } from "@/utils/users.be";
import { withIronSessionSsr } from "iron-session/next";
import { uniqBy } from "lodash";
import Head from "next/head";
import { useRouter } from "next/router";
import { useMemo } from "react";
import {
	BsBank,
	BsClipboard2Data,
	BsEnvelopePaper,
	BsPencilSquare,
	BsPeople,
	BsPeopleFill,
	BsPersonFill,
	BsPersonFillGear,
} from "react-icons/bs";
import { ToastContainer } from "react-toastify";

interface Props {
	user: User;
	students: User[];
	latestStudents: User[]
	latestTeachers: User[]
	entities: EntityWithRoles[];
	usersCount: { [key in Type]: number }
	assignmentsCount: number;
	stats: Stat[];
	groupsCount: number;
}

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

	if (!checkAccess(user, ["admin", "developer"])) return redirect("/")

	const students = await getUsers({ type: 'student' });
	const usersCount = {
		student: await countUsers({ type: "student" }),
		teacher: await countUsers({ type: "teacher" }),
		corporate: await countUsers({ type: "corporate" }),
		mastercorporate: await countUsers({ type: "mastercorporate" }),
	}

	const latestStudents = await getUsers({ type: 'student' }, 10, { registrationDate: -1 })
	const latestTeachers = await getUsers({ type: 'teacher' }, 10, { registrationDate: -1 })

	const entities = await getEntitiesWithRoles();
	const assignmentsCount = await countEntitiesAssignments(mapBy(entities, 'id'), { archived: { $ne: true } });
	const groupsCount = await countGroups();

	const stats = await getStatsByUsers(mapBy(students, 'id'));

	return { props: serialize({ user, students, latestStudents, latestTeachers, usersCount, entities, assignmentsCount, stats, groupsCount }) };
}, sessionOptions);

export default function Dashboard({
	user,
	students,
	latestStudents,
	latestTeachers,
	usersCount,
	entities,
	assignmentsCount,
	stats,
	groupsCount
}: Props) {
	const router = useRouter();

	return (
		<>
			<Head>
				<title>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}>
				<section className="grid grid-cols-5 place-items-center -md:grid-cols-2 gap-4 text-center">
					<IconCard
						onClick={() => router.push("/users?type=student")}
						Icon={BsPersonFill}
						label="Students"
						value={usersCount.student}
						color="purple"
					/>
					<IconCard
						onClick={() => router.push("/users?type=teacher")}
						Icon={BsPencilSquare}
						label="Teachers"
						value={usersCount.teacher}
						color="purple"
					/>
					<IconCard
						Icon={BsBank}
						onClick={() => router.push("/users?type=corporate")}
						label="Corporates"
						value={usersCount.corporate}
						color="purple"
					/>
					<IconCard
						Icon={BsBank}
						onClick={() => router.push("/users?type=mastercorporate")}
						label="Master Corporates"
						value={usersCount.mastercorporate}
						color="purple"
					/>
					<IconCard
						Icon={BsPeople}
						onClick={() => router.push("/classrooms")}
						label="Classrooms"
						value={groupsCount}
						color="purple"
					/>
					<IconCard Icon={BsPeopleFill}
						onClick={() => router.push("/entities")}
						label="Entities"
						value={entities.length}
						color="purple"
					/>
					<IconCard Icon={BsClipboard2Data} label="Exams Performed" value={uniqBy(stats, "exam").length} color="purple" />
					<IconCard Icon={BsPersonFillGear}
						onClick={() => router.push("/statistical")}
						label="Entity Statistics"
						value={entities.length}
						color="purple"
					/>
					<IconCard Icon={BsPersonFillGear}
						onClick={() => router.push("/users/performance")}
						label="Student Performance"
						value={students.length}
						color="purple"
					/>
					<IconCard
						Icon={BsEnvelopePaper}
						onClick={() => router.push("/assignments")}
						label="Assignments"
						value={assignmentsCount}
						color="purple"
					/>
				</section>

				<section className="grid grid-cols-1 md:grid-cols-2 gap-4 w-full justify-between">
					<UserDisplayList
						users={latestStudents}
						title="Latest Students"
					/>
					<UserDisplayList
						users={latestTeachers}
						title="Latest Teachers"
					/>
					<UserDisplayList
						users={students.sort((a, b) => calculateAverageLevel(b.levels) - calculateAverageLevel(a.levels))}
						title="Highest level students"
					/>
					<UserDisplayList
						users={
							students
								.sort(
									(a, b) =>
										Object.keys(groupByExam(filterBy(stats, "user", b))).length -
										Object.keys(groupByExam(filterBy(stats, "user", a))).length,
								)
						}
						title="Highest exam count students"
					/>
				</section>
			</Layout>
		</>
	);
}
