import { LoginResponse, LoginToken, LoginUser, UserToken } from "../types";
import Storage from "../utils/Storage";
import UserAPI from "../api/UserAPI";

const loginUser = reactive<LoginUser>({
	token: undefined,
	user: undefined
});

function isLogged(): boolean {
	return !!loginUser.user;
}

async function login4Token(token: LoginToken): Promise<LoginResponse | null> {
	loginUser.token = token;
	// 未过期
	try {
		const resp = await UserAPI.login4Token();
		await updateToken(resp);
		return resp;
	} catch (e) {
		await logout();
	}
	return null;
}

async function login4Storage(): Promise<LoginResponse | null> {
	if (!loginUser.user && (loginUser.token || Storage.has("token"))) {
		// 未登录，储存有令牌
		const token = Storage.getJSON("token") as UserToken;
		if (new Date().getTime() < token.expireAt) {
			return await login4Token(token);
		}
	}
	return null;
}

async function updateToken(loginResponse: LoginResponse): Promise<void> {
	loginUser.token = {
		id: loginResponse.id,
		value: loginResponse.token,
		expireAt: loginResponse.expireAt
	};
	loginUser.user = await UserAPI.view(loginResponse.id);

	Storage.setJSON("token", {
		value: loginUser.token.value,
		expireAt: loginUser.token.expireAt
	} as UserToken);
}

async function logout(): Promise<void> {
	await UserAPI.logout();

	loginUser.token = undefined;
	loginUser.user = undefined;

	Storage.remove("token");
}

async function reloadProfile() {
	if (loginUser.token && loginUser.token.id) {
		loginUser.user = await UserAPI.view(loginUser.token.id);
	}
}

const userStore = {
	loginUser,
	isLogged,
	login4Token,
	login4Storage,
	updateToken,
	logout,
	reloadProfile
};

export {
	userStore
};