import { IqserAppConfig, UI_ROOT } from '../utils';
import { KeycloakOptions, KeycloakService } from 'keycloak-angular';
import { KeycloakStatusService } from './services/keycloak-status.service';
import { inject } from '@angular/core';
import { getConfig } from '../services';
import { NGXLogger } from 'ngx-logger';
import { Router } from '@angular/router';

export function getKeycloakOptions(baseUrl: string, config: IqserAppConfig, tenant: string): KeycloakOptions {
    let oauthUrl = config.OAUTH_URL;
    if (!oauthUrl.startsWith('http')) {
        oauthUrl = oauthUrl.startsWith('/') ? oauthUrl : '/' + oauthUrl;
        oauthUrl = window.location.origin + oauthUrl;
    }

    return {
        config: {
            url: oauthUrl,
            realm: tenant,
            clientId: config.OAUTH_CLIENT_ID,
        },
        initOptions: {
            checkLoginIframe: false,
            onLoad: 'check-sso',
            silentCheckSsoRedirectUri: window.location.origin + baseUrl + '/assets/oauth/silent-refresh.html',
            flow: 'standard',
            enableLogging: true,
        },
        enableBearerInterceptor: true,
        loadUserProfileAtStartUp: true,
    };
}

function configureAutomaticRedirectToLoginScreen(keyCloakService: KeycloakService, keycloakStatusService: KeycloakStatusService) {
    const keycloakInstance = keyCloakService.getKeycloakInstance();
    keycloakInstance.onAuthRefreshError = () => {
        console.log('onAuthRefreshError');
        keycloakStatusService.createLoginUrlAndExecute();
    };

    keycloakInstance.onAuthError = err => {
        console.log('onAuthError', err);
    };
}

export async function keycloakInitializer(tenant: string) {
    const logger = inject(NGXLogger);
    const router = inject(Router);
    const keycloakService = inject(KeycloakService);
    const keycloakStatusService = inject(KeycloakStatusService);
    const uiRoot = inject(UI_ROOT);
    const config = getConfig();

    const keycloakOptions = getKeycloakOptions(uiRoot, config, tenant);
    try {
        await keycloakService.init(keycloakOptions);
    } catch (error) {
        logger.error('[KEYCLOAK] Unable to initialize Keycloak', error);
        await router.navigate(['/']);
        return;
    }
    configureAutomaticRedirectToLoginScreen(keycloakService, keycloakStatusService);
}