import { useRouter } from 'expo-router';
import * as SecureStore from 'expo-secure-store';
import { Platform } from 'react-native';
import { API_ENDPOINT, refreshAuthToken } from './server-api-util';


export async function identityCheck(token: string) {
    const res = await fetch(`${API_ENDPOINT}/v1/iam/identity-check`, {
        method: 'POST',
        headers: {
            'Authorization': `Bearer ${token}`
        },
    });
    const data = await res.json();
    if (data.code != 0) {
        await refreshAuthToken("Token expired");
    }
    return data.code == 0;
}

/**
 * 检查登录态，未登录自动跳转到 /login，已登录可执行回调。
 * @param onAuthed 已登录时的回调（可选）
 * @param login 是否跳转登录页（可选）
 */
export async function checkAuthStatus(router: ReturnType<typeof useRouter>, onAuthed?: () => Promise<void> | void, login: boolean = true) {
    let token: string | null = '';
    if (Platform.OS === 'web') {
        token = localStorage.getItem('token') || '';
    } else {
        token = await SecureStore.getItemAsync('token') || '';
    }

    const loggedIn = !!token && await identityCheck(token);
    if (!loggedIn && login) {
        router.replace('/login');
        return false;
    }
    if (onAuthed && loggedIn) {
        await onAuthed();
    }
    return true;
}