import Keycloak from 'keycloak-js';

const options = {
    url: import.meta.env.VITE_KEYCLOAK_URL,
    clientId: import.meta.env.VITE_KEYCLOAK_CLIENT_ID,
    realm: import.meta.env.VITE_KEYCLOAK_REALM
}


const keycloak = new Keycloak(options);
let authenticated: boolean | undefined;
let store = null;

async function login(){
    try {
        await keycloak.login() // https://www.keycloak.org/securing-apps/javascript-adapter#:~:text=when%20initialization%20completes.-,login(options),-Redirects%20to%20login
        return keycloak;
    } catch (error) {
        console.log(error)
    }
}

async function signup(){
    try {
        await keycloak.login(
            {action: "register"}
        ) // https://www.keycloak.org/securing-apps/javascript-adapter#:~:text=when%20initialization%20completes.-,login(options),-Redirects%20to%20login
        return keycloak;
    } catch (error) {
        console.log(error)
    }
}

/**
 * Initializes Keycloak, then run callback. This will prompt you to login.
 *
 * @param onInitCallback
 */
async function init(onInitCallback: () => void) {
    try {
        authenticated = await keycloak.init({
            onLoad: "check-sso",
            silentCheckSsoRedirectUri: `${location.origin}/silent-check-sso.htm`,
            responseMode: "query",
        })
        onInitCallback()
    } catch (error) {
        console.error("Keycloak init failed")
        console.error(error)
    }
};

/**
 * Initializes store with Keycloak user data
 *
 */
async function initStore(storeInstance: any) {
    try {
        store = storeInstance
        console.log(keycloak)
        await store.initOauth(keycloak)

        // Show alert if user is not authenticated
        if (!authenticated) { console.warn("not authenticated") }
    } catch (error) {
        console.error("Keycloak init failed")
        console.error(error)
    }
};

/**
 * Logout user
 */
function logout(url: string) {
    keycloak.logout({ redirectUri: url });
}

/**
 * Refreshes token
 */
async function refreshToken() {
    try {
        await keycloak.updateToken(480);
        return keycloak;
    } catch (error) {
        console.error('Failed to refresh token');
        console.error(error);
    }
}

const KeycloakService = {
    CallInit: init,
    CallInitStore: initStore,
    CallLogout: logout,
    CallTokenRefresh: refreshToken,
    callLogin: login,
    callSignup: signup,
};

export default KeycloakService;