package org.gcube.common.keycloak;

import java.net.URL;

import org.gcube.common.keycloak.model.ModelUtils;
import org.gcube.common.keycloak.model.TokenResponse;
import org.gcube.common.scope.api.ScopeProvider;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.FixMethodOrder;
import org.junit.Test;
import org.junit.runners.MethodSorters;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class TestKeycloakClient {

    protected static final Logger logger = LoggerFactory.getLogger(TestKeycloakClient.class);

    private static final String DEV_ENDPOINT = "https://accounts.dev.d4science.org/auth/realms/d4science/protocol/openid-connect/token";
    private static final String CLIENT_ID = "keycloak-client";
    private static final String CLIENT_SECRET = "38f76152-2b7c-418f-9b67-66f4cc2f401e";
    private static final String TEST_AUDIENCE = "conductor-server";

    private static TokenResponse oidcTR = null;
    private static TokenResponse umaTR = null;

    @Before
    public void setUp() throws Exception {
        ScopeProvider.instance.set("/gcube");
    }

    @After
    public void tearDown() throws Exception {
    }

    @Test
    public void test01EndpointDiscovery() throws Exception {
        logger.info("*** [0.1] Start testing Keycloak endpoint discovery...");
        URL url = KeycloakClientFactory.newInstance().findTokenEndpointURL();
        Assert.assertNotNull(url);
        Assert.assertTrue(url.getProtocol().equals("https"));
        Assert.assertEquals(new URL(DEV_ENDPOINT), url);
        logger.info("Discovered URL is: {}", url);
    }

    @Test
    public void test11QueryOIDCTokenWithDiscoveryInCurrentScope() throws Exception {
        logger.info("*** [1.1] Start testing query OIDC token from Keycloak with endpoint discovery and current scope...");
        oidcTR = KeycloakClientFactory.newInstance().queryOIDCToken(CLIENT_ID, CLIENT_SECRET);
        TestModels.checkTokenResponse(oidcTR);
        TestModels.checkAccessToken(ModelUtils.getAccessTokenFrom(oidcTR), "service-account-" + CLIENT_ID);
    }

    @Test
    public void test12QueryOIDCToken() throws Exception {
        logger.info("*** [1.2] Start testing query OIDC token from Keycloak with URL...");
        oidcTR = KeycloakClientFactory.newInstance().queryOIDCToken(new URL(DEV_ENDPOINT), CLIENT_ID, CLIENT_SECRET);
        TestModels.checkTokenResponse(oidcTR);
        TestModels.checkAccessToken(ModelUtils.getAccessTokenFrom(oidcTR), "service-account-" + CLIENT_ID);
    }

    @Test
    public void test13RefreshOIDCTokenWithDiscovery() throws Exception {
        logger.info("*** [1.3] Start testing refresh OIDC token from Keycloak with endpoint discovery...");
        TokenResponse refreshedTR = KeycloakClientFactory.newInstance().refreshToken(CLIENT_ID, CLIENT_SECRET, oidcTR);
        TestModels.checkTokenResponse(refreshedTR);
        TestModels.checkAccessToken(ModelUtils.getAccessTokenFrom(refreshedTR), "service-account-" + CLIENT_ID);
        TestModels.checkRefreshToken(ModelUtils.getRefreshTokenFrom(refreshedTR));
    }

    @Test
    public void test21QueryUMATokenWithDiscoveryInCurrentScope() throws Exception {
        logger.info(
                "*** [2.1] Start testing query UMA token from Keycloak with endpoint discovery and current scope as audience...");

        umaTR = KeycloakClientFactory.newInstance().queryUMAToken(CLIENT_ID, CLIENT_SECRET, null);
        TestModels.checkTokenResponse(umaTR);
        TestModels.checkAccessToken(ModelUtils.getAccessTokenFrom(umaTR), "service-account-" + CLIENT_ID);
    }

    @Test
    public void test22QueryUMATokenWithDiscovery() throws Exception {
        logger.info("*** [2.2] Start testing query UMA token from Keycloak with endpoint discovery...");
        umaTR = KeycloakClientFactory.newInstance().queryUMAToken(CLIENT_ID, CLIENT_SECRET, TEST_AUDIENCE, null);
        TestModels.checkTokenResponse(umaTR);
        TestModels.checkAccessToken(ModelUtils.getAccessTokenFrom(umaTR), "service-account-" + CLIENT_ID);
    }

    @Test
    public void test23QueryUMATokenWithDiscoveryWithOIDCAuthorization() throws Exception {
        logger.info(
                "*** [2.3] Start testing query UMA token from Keycloak with endpoint discovery and OIDC access token for authorization...");

        umaTR = KeycloakClientFactory.newInstance().queryUMAToken(oidcTR, TEST_AUDIENCE, null);
        TestModels.checkTokenResponse(umaTR);
        TestModels.checkAccessToken(ModelUtils.getAccessTokenFrom(umaTR), "service-account-" + CLIENT_ID);
    }

    @Test
    public void test24QueryUMAToken() throws Exception {
        logger.info("*** [2.4] Start testing query UMA token from Keycloak with URL...");
        umaTR = KeycloakClientFactory.newInstance().queryUMAToken(new URL(DEV_ENDPOINT), CLIENT_ID, CLIENT_SECRET,
                TEST_AUDIENCE, null);

        TestModels.checkTokenResponse(umaTR);
        TestModels.checkAccessToken(ModelUtils.getAccessTokenFrom(umaTR), "service-account-" + CLIENT_ID);
    }

    @Test
    public void test25RefreshUMATokenWithDiscovery() throws Exception {
        logger.info("*** [2.5] Start testing refresh UMA token from Keycloak with endpoint discovery...");
        TokenResponse refreshedTR = KeycloakClientFactory.newInstance().refreshToken(CLIENT_ID, CLIENT_SECRET, umaTR);
        TestModels.checkTokenResponse(refreshedTR);
        TestModels.checkAccessToken(ModelUtils.getAccessTokenFrom(refreshedTR), "service-account-" + CLIENT_ID);
        TestModels.checkRefreshToken(ModelUtils.getRefreshTokenFrom(refreshedTR));
    }

    @Test(expected = KeycloakClientException.class)
    public void test26RefreshTokenWithDiscoveryAndClientIdFromRefreshToken() throws Exception {
        logger.info("*** [2.6] Start testing refresh UMA token *with error* since is not a public client...");
        KeycloakClientFactory.newInstance().refreshToken(umaTR.getRefreshToken());
    }

}