'use client';

import { use, useEffect, useRef, useState } from 'react';
import { useDonationHub } from '@/hooks/useDonationHub';
import { fetchApi } from '@/lib/utils/client';
import { GoalProgress } from '@/types/donation';
import './style.scss';

type Props = {
	params: Promise<{ widgetToken: string }>;
	searchParams: Promise<{ [key: string]: string|string[]|undefined }>;
};

type GoalStyleConfig = {
	id: number;
	title: string;
	style: number;
	startAmount: number;
	targetAmount: number;
	isShowPercent: boolean;
	barColor: string;
	barBackgroundColor: string;
	barHeightPx: number;
	titleFontSizePx: number;
	titleFontColor: string;
	amountFontSizePx: number;
	amountFontColor: string;
	titleFontFamily: string|null;
	amountFontFamily: string|null;
	isActive: boolean;
};

const DEFAULT_STYLE: Omit<GoalStyleConfig, 'id'|'title'|'style'|'startAmount'|'targetAmount'|'isActive'> = {
	isShowPercent: true,
	barColor: '#FF6B35',
	barBackgroundColor: '#333333',
	barHeightPx: 30,
	titleFontSizePx: 18,
	titleFontColor: '#FFFFFF',
	amountFontSizePx: 14,
	amountFontColor: '#CCCCCC',
	titleFontFamily: null,
	amountFontFamily: null
};

export default function GoalPage({ params, searchParams }: Props) {
	const { widgetToken } = use(params);
	const sp = use(searchParams);
	const configID = typeof sp.configID === 'string' ? parseInt(sp.configID, 10) : null;
	const hubUrl = process.env.NEXT_PUBLIC_API_URL + '/hubs/donation';
	const { goalProgress, setGoalProgress } = useDonationHub(widgetToken, hubUrl);
	const [styleCfg, setStyleCfg] = useState<GoalStyleConfig|null>(null);
	const widgetRef = useRef<HTMLDivElement>(null);

	// 스타일 config 로드
	useEffect(() => {
		const qs = configID ? `?configID=${configID}` : '';
		fetchApi<GoalStyleConfig>(`/api/widget/goal/config/${widgetToken}${qs}`, { silent: true }).then(res => {
			if (res.data) {
				setStyleCfg(res.data);
			}
		}).catch(() => {});
	}, [widgetToken, configID]);

	// 진행률 데이터 로드 (SignalR broadcast 전 초기 표시)
	useEffect(() => {
		const qs = configID ? `?configID=${configID}` : '';
		fetchApi<GoalProgress>(`/api/widget/goal/by-token/${widgetToken}${qs}`, { silent: true }).then(res => {
			if (res.data) {
				setGoalProgress(res.data);
			}
		}).catch(() => {});
	}, [widgetToken, configID, setGoalProgress]);

	// CSS variables 적용 (goalProgress 없어도 styleCfg 기반으로 빈 진행바 스타일링)
	useEffect(() => {
		if (!widgetRef.current) {
			return;
		}
		const el = widgetRef.current;
		const cfg = styleCfg ?? null;
		const titleFontSize = cfg?.titleFontSizePx ?? DEFAULT_STYLE.titleFontSizePx;
		const titleColor = cfg?.titleFontColor ?? DEFAULT_STYLE.titleFontColor;
		const barHeight = cfg?.barHeightPx ?? DEFAULT_STYLE.barHeightPx;
		const barBgColor = cfg?.barBackgroundColor ?? DEFAULT_STYLE.barBackgroundColor;
		const barColor = cfg?.barColor ?? DEFAULT_STYLE.barColor;
		const amountSize = cfg?.amountFontSizePx ?? DEFAULT_STYLE.amountFontSizePx;
		const amountColor = cfg?.amountFontColor ?? DEFAULT_STYLE.amountFontColor;
		const titleFamily = cfg?.titleFontFamily ?? 'inherit';
		const amountFamily = cfg?.amountFontFamily ?? 'inherit';
		const fillPercent = goalProgress ? Math.min(goalProgress.percent, 100) : 0;

		el.style.setProperty('--goal-title-font-size', `${titleFontSize}px`);
		el.style.setProperty('--goal-title-color', titleColor);
		el.style.setProperty('--goal-title-font-family', titleFamily);
		el.style.setProperty('--goal-bar-height', `${barHeight}px`);
		el.style.setProperty('--goal-bar-bg-color', barBgColor);
		el.style.setProperty('--goal-bar-color', barColor);
		el.style.setProperty('--goal-bar-fill-width', `${fillPercent}%`);
		el.style.setProperty('--goal-amount-font-size', `${amountSize}px`);
		el.style.setProperty('--goal-amount-color', amountColor);
		el.style.setProperty('--goal-amount-font-family', amountFamily);
	}, [goalProgress, styleCfg]);

	// goalProgress 없어도 styleCfg 기반으로 빈 진행바 표시 (위젯 즉시 노출)
	const display = goalProgress ?? {
		title: styleCfg?.title ?? '후원 목표',
		startAmount: styleCfg?.startAmount ?? 0,
		targetAmount: styleCfg?.targetAmount ?? 0,
		currentAmount: styleCfg?.startAmount ?? 0,
		percent: 0
	};
	const { title, currentAmount, targetAmount, percent } = display;
	const isShowPercent = styleCfg?.isShowPercent ?? DEFAULT_STYLE.isShowPercent;

	return (
		<div ref={widgetRef} className="goal-widget">
			<div className="goal-title">
				{title}
			</div>

			<div className="goal-bar-wrapper">
				<div className="goal-bar-bg">
					<div className="goal-bar-fill" />
				</div>
				<div className="goal-bar-text">
					{currentAmount.toLocaleString()}원 / {targetAmount.toLocaleString()}원
					{isShowPercent && ` (${percent}%)`}
				</div>
			</div>
		</div>
	);
}