'use client';

import '../styles/profile.scss';
import { useEffect, useState } from 'react';
import Link from 'next/link';
import { GoogleOAuthProvider, GoogleLogin, useGoogleOneTapLogin } from '@react-oauth/google';
import useAuth from '@/hooks/useAuth';
import { useConfigContext } from '@/contexts/configProvider';
import { fetchApi } from '@/lib/utils/client';
import { DropdownData } from '@/types/response/mypage/dropdown';
import { LoginResponse } from '@/types/response/auth';
import { Avatar, AvatarImage, AvatarFallback } from '@/components/ui/avatar';
import SignalSteamIcon from '@/public/icons/user/signal-steam.svg';

import {
	DropdownMenu,
	DropdownMenuContent,
	DropdownMenuItem,
	DropdownMenuLabel,
	DropdownMenuSeparator,
	DropdownMenuTrigger,
} from '@/components/ui/dropdown-menu';

import {
	Package,
	UserRoundCog,
	LogOut
} from 'lucide-react';

export default function Profile()
{
	const config = useConfigContext();
	const clientId = config?.external?.googleClientId ?? '';

	return (
		<GoogleOAuthProvider clientId={clientId} nonce="" locale="ko">
			<ProfileInner />
		</GoogleOAuthProvider>
	);
}

function ProfileInner() {
	const { member, login, logout } = useAuth();
	const [open, setOpen] = useState(false);
	const [data, setData] = useState<DropdownData|null>(null);

	// 구글 로그인 핸들러
	const handleGoogleLogin = async (credentialResponse: { credential?: string }) => {
		try {
			const res = await fetchApi<LoginResponse>('/api/auth/google-login', {
				method: 'POST',
				body: {
					credential: credentialResponse.credential
				}
			});

			login(true);
		} catch {
			// silent
		}
	};

	// Google One Tap — 비로그인 상태에서만 활성화
	useGoogleOneTapLogin({
		onSuccess: handleGoogleLogin,
		onError: () => {},
		disabled: !!member
	});

	// 드롭다운 열 때 잔액 조회
	const loadData = async () => {
		const res = await fetchApi<DropdownData>('/api/mypage/dropdown');
		if (res.data) {
			setData(res.data);
		}
	};

	useEffect(() => {
		if (!open) {
			return;
		}

		loadData();
	}, [open]);

	// 충전 완료 시 팝업에서 postMessage 수신 → 잔액 갱신
	useEffect(() => {
		const handleMessage = (e: MessageEvent) => {
			if (e.data?.type === 'CHARGE_COMPLETE') {
				loadData();
			}
		};

		window.addEventListener('message', handleMessage);
		return () => window.removeEventListener('message', handleMessage);
	}, []);

	// ── 비로그인 ──────────────────────────────────
	if (!member) {
		return (
			<DropdownMenu>
				<DropdownMenuTrigger asChild>
					<label className="profile-dropdown__trigger--guest">
						로그인
					</label>
				</DropdownMenuTrigger>
				<DropdownMenuContent className="profile-dropdown__login-content" align="end">
					<div className="profile-dropdown__login-panel">
						<GoogleLogin
							onSuccess={handleGoogleLogin}
							onError={() => {}}
							size="large"
							shape="rectangular"
							logo_alignment="center"
						/>
					</div>
				</DropdownMenuContent>
			</DropdownMenu>
		);
	}

	// ── 로그인 ────────────────────────────────────
	const displayName = member.name || member.sid;
	const initial = (member.name || member.sid || '?').charAt(0).toUpperCase();

	return (
		<DropdownMenu open={open} onOpenChange={setOpen}>
			<DropdownMenuTrigger asChild>
				<button type="button" className="profile-dropdown__trigger" title={displayName}>
					<Avatar className="h-8 w-8">
						<AvatarImage src={member.thumb || undefined} alt={displayName} />
						<AvatarFallback className="profile-dropdown__fallback">{initial}</AvatarFallback>
					</Avatar>
				</button>
			</DropdownMenuTrigger>

			<DropdownMenuContent className="profile-dropdown__content" align="end">
				{/* 프로필 헤더 */}
				<DropdownMenuLabel className="profile-dropdown__header">
					<Avatar>
						<AvatarImage src={member.thumb || undefined} alt={displayName} />
						<AvatarFallback className="profile-dropdown__fallback">{initial}</AvatarFallback>
					</Avatar>
					<div className="profile-dropdown__user-info">
						<div className="profile-dropdown__name">{displayName}</div>
						{data && (
							<>
								<div className="profile-dropdown__balance">
									<span className="profile-dropdown__balance-icon">P</span>
									<span>{data.spendableBalance.toLocaleString()}</span>
								</div>
								{data.isCreator && data.withdrawableBalance !== null && (
									<div className="profile-dropdown__withdraw">
										<span className="profile-dropdown__withdraw-icon">M</span>
										<span>{data.withdrawableBalance.toLocaleString()}</span>
									</div>
								)}
							</>
						)}
					</div>
				</DropdownMenuLabel>

				<DropdownMenuSeparator />

				{member.isCreator && (
					<DropdownMenuItem asChild>
						<Link href="/studio">
							<span className="profile-dropdown__menu-icon">
								<SignalSteamIcon width={20} height={20} aria-label='채널 관리' />
							</span>
							채널 관리
						</Link>
					</DropdownMenuItem>
				)}
				<DropdownMenuItem asChild>
					<Link href="/profile">
						<span className="profile-dropdown__menu-icon">
							<UserRoundCog width={20} height={20} aria-label='내 정보' />
						</span>
						내 정보
					</Link>
				</DropdownMenuItem>
				<DropdownMenuItem asChild>
					<Link href="/storage">
						<span className="profile-dropdown__menu-icon">
							<Package width={20} height={20} aria-label='보관함' />
						</span>
						보관함
					</Link>
				</DropdownMenuItem>

				<DropdownMenuSeparator />

				<DropdownMenuItem className="profile-dropdown__danger" onSelect={logout}>
					<span className="profile-dropdown__menu-icon">
						<LogOut width={20} height={20} aria-label='로그아웃' />
					</span>
					로그아웃
				</DropdownMenuItem>
			</DropdownMenuContent>
		</DropdownMenu>
	);
}