'use client';

import { useCallback, useEffect, useMemo, useState } from 'react';
import { useRouter, useSearchParams } from 'next/navigation';
import { fetchApi } from '@/lib/utils/client';
import useAuth from '@/hooks/useAuth';
import { useMemberContext } from '@/contexts/memberProvider';
import Loading from '@/app/component/Loading';
import RankingTabs from './RankingTabs';
import PeriodFilter from './PeriodFilter';
import CategoryFilter from './CategoryFilter';
import Podium from './Podium';
import RankingList from './RankingList';
import MyRankBar from './MyRankBar';
import type { RankingResponse, RankingPeriod, RankingType } from '@/types/response/ranking';

interface Props {
	type: 'comprehensive'|'creator'|'donor';
	basePath: string;
}

export default function RankingView({ type, basePath }: Props)
{
	const router = useRouter();
	const searchParams = useSearchParams();
	const { isAuthenticated } = useAuth();
	const { member } = useMemberContext();

	const initialPeriod = (searchParams.get('period') as RankingPeriod) || 'month';
	const initialCategory = searchParams.get('category') || 'all';

	const [period, setPeriod] = useState<RankingPeriod>(initialPeriod);
	const [category, setCategory] = useState<string>(initialCategory);
	const [data, setData] = useState<RankingResponse|null>(null);
	const [loading, setLoading] = useState(true);

	const viewerMemberID = isAuthenticated ? member?.id ?? null : null;

	const loadData = useCallback(() => {
		setLoading(true);
		const qs = new URLSearchParams();
		qs.set('type', type);
		qs.set('period', period);
		qs.set('category', category);
		qs.set('page', '1');
		qs.set('perPage', '50');

		fetchApi<RankingResponse>(`/api/ranking?${qs.toString()}`, { silent: true }).then((res) => {
			setData(res.data ?? null);
		}).catch(() => {
			setData(null);
		}).finally(() => {
			setLoading(false);
		});
	}, [type, period, category]);

	useEffect(() => {
		loadData();
	}, [loadData]);

	useEffect(() => {
		const qs = new URLSearchParams();

		if (period !== 'month') {
			qs.set('period', period);
		}

		if (category !== 'all') {
			qs.set('category', category);
		}

		const query = qs.toString();
		router.replace(query ? `${basePath}?${query}` : basePath, { scroll: false });
	}, [period, category, basePath, router]);

	const asRankingType: RankingType = type;

	const snapshotLabel = useMemo(() => {
		if (!data?.snapshotAt) {
			return null;
		}
		const d = new Date(data.snapshotAt);
		return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')} 기준`;
	}, [data?.snapshotAt]);

	return (
		<div className="ranking">
			<header className="ranking__header">
				<h1>순위</h1>
			</header>

			<RankingTabs active={type} />

			<div className="ranking__filters">
				<PeriodFilter value={period} onChange={setPeriod} />
				{type !== 'donor' ? <CategoryFilter value={category} onChange={setCategory} /> : null}
			</div>

			{loading ? (
				<Loading type={2} />
			) : (
				<>
					{data && data.top3.length > 0 ? (
						<Podium top3={data.top3} type={asRankingType} />
					) : null}

					{snapshotLabel ? <p className="ranking__list-note">{snapshotLabel}</p> : null}

					<RankingList entries={data?.list ?? []} type={asRankingType} viewerMemberID={viewerMemberID} />

					{data?.myRank ? <MyRankBar info={data.myRank} type={asRankingType} /> : null}
				</>
			)}
		</div>
	);
}