/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.keycloak.testsuite.forms;

import org.junit.*;
import org.keycloak.events.Details;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.PasswordPolicy;
import org.keycloak.models.RealmModel;
import org.keycloak.models.UserModel;
import org.keycloak.services.managers.RealmManager;
import org.keycloak.testsuite.AssertEvents;
import org.keycloak.testsuite.OAuthClient;
import org.keycloak.testsuite.pages.AppPage;
import org.keycloak.testsuite.pages.AppPage.RequestType;
import org.keycloak.testsuite.pages.LoginPage;
import org.keycloak.testsuite.pages.RegisterPage;
import org.keycloak.testsuite.rule.KeycloakRule;
import org.keycloak.testsuite.rule.WebResource;
import org.keycloak.testsuite.rule.WebRule;
import org.openqa.selenium.WebDriver;

import static org.junit.Assert.assertEquals;

/**
 * @author <a href="mailto:sthorger@redhat.com">Stian Thorgersen</a>
 */
public class RegisterTest {

    @ClassRule
    public static KeycloakRule keycloakRule = new KeycloakRule();

    @Rule
    public AssertEvents events = new AssertEvents(keycloakRule);

    @Rule
    public WebRule webRule = new WebRule(this);

    @WebResource
    protected WebDriver driver;

    @WebResource
    protected AppPage appPage;

    @WebResource
    protected LoginPage loginPage;

    @WebResource
    protected RegisterPage registerPage;

    @WebResource
    protected OAuthClient oauth;

    @Test
    public void registerExistingUser() {
        loginPage.open();
        loginPage.clickRegister();
        registerPage.assertCurrent();

        registerPage.register("firstName", "lastName", "registerExistingUser@email", "test-user@localhost", "password", "password");

        registerPage.assertCurrent();
        assertEquals("Username already exists.", registerPage.getError());

        // assert form keeps form fields on error
        assertEquals("firstName", registerPage.getFirstName());
        assertEquals("lastName", registerPage.getLastName());
        assertEquals("registerExistingUser@email", registerPage.getEmail());
        assertEquals("", registerPage.getUsername());
        assertEquals("", registerPage.getPassword());
        assertEquals("", registerPage.getPasswordConfirm());

        events.expectRegister("test-user@localhost", "registerExistingUser@email")
                .removeDetail(Details.EMAIL)
                .user((String) null).error("username_in_use").assertEvent();
    }

    @Test
    public void registerUserInvalidPasswordConfirm() {
        loginPage.open();
        loginPage.clickRegister();
        registerPage.assertCurrent();

        registerPage.register("firstName", "lastName", "registerUserInvalidPasswordConfirm@email", "registerUserInvalidPasswordConfirm", "password", "invalid");

        registerPage.assertCurrent();
        assertEquals("Password confirmation doesn't match.", registerPage.getError());

        // assert form keeps form fields on error
        assertEquals("firstName", registerPage.getFirstName());
        assertEquals("lastName", registerPage.getLastName());
        assertEquals("registerUserInvalidPasswordConfirm@email", registerPage.getEmail());
        assertEquals("registerUserInvalidPasswordConfirm", registerPage.getUsername());
        assertEquals("", registerPage.getPassword());
        assertEquals("", registerPage.getPasswordConfirm());

        events.expectRegister("registerUserInvalidPasswordConfirm", "registerUserInvalidPasswordConfirm@email")
                .removeDetail(Details.USERNAME)
                .removeDetail(Details.EMAIL)
                .user((String) null).error("invalid_registration").assertEvent();
    }

    @Test
    public void registerUserMissingPassword() {
        loginPage.open();
        loginPage.clickRegister();
        registerPage.assertCurrent();

        registerPage.register("firstName", "lastName", "registerUserMissingPassword@email", "registerUserMissingPassword", null, null);

        registerPage.assertCurrent();
        assertEquals("Please specify password.", registerPage.getError());

        events.expectRegister("registerUserMissingPassword", "registerUserMissingPassword@email")
                .removeDetail(Details.USERNAME)
                .removeDetail(Details.EMAIL)
                .user((String) null).error("invalid_registration").assertEvent();
    }

    @Test
    public void registerPasswordPolicy() {
        keycloakRule.configure(new KeycloakRule.KeycloakSetup() {
            @Override
            public void config(RealmManager manager, RealmModel adminstrationRealm, RealmModel appRealm) {
                appRealm.setPasswordPolicy(new PasswordPolicy("length"));
            }
        });

        try {
            loginPage.open();
            loginPage.clickRegister();
            registerPage.assertCurrent();

            registerPage.register("firstName", "lastName", "registerPasswordPolicy@email", "registerPasswordPolicy", "pass", "pass");

            registerPage.assertCurrent();
            assertEquals("Invalid password: minimum length 8.", registerPage.getError());

            events.expectRegister("registerPasswordPolicy", "registerPasswordPolicy@email")
                    .removeDetail(Details.USERNAME)
                    .removeDetail(Details.EMAIL)
                    .user((String) null).error("invalid_registration").assertEvent();

            registerPage.register("firstName", "lastName", "registerPasswordPolicy@email", "registerPasswordPolicy", "password", "password");
            assertEquals(RequestType.AUTH_RESPONSE, appPage.getRequestType());

            String userId = events.expectRegister("registerPasswordPolicy", "registerPasswordPolicy@email").assertEvent().getUserId();

            events.expectLogin().user(userId).detail(Details.USERNAME, "registerpasswordpolicy").assertEvent();
        } finally {
            keycloakRule.configure(new KeycloakRule.KeycloakSetup() {
                @Override
                public void config(RealmManager manager, RealmModel adminstrationRealm, RealmModel appRealm) {
                    appRealm.setPasswordPolicy(new PasswordPolicy(null));
                }
            });
        }
    }

    @Test
    public void registerUserMissingUsername() {
        loginPage.open();
        loginPage.clickRegister();
        registerPage.assertCurrent();

        registerPage.register("firstName", "lastName", "registerUserMissingUsername@email", null, "password", "password");

        registerPage.assertCurrent();
        assertEquals("Please specify username.", registerPage.getError());

        events.expectRegister(null, "registerUserMissingUsername@email")
                .removeDetail(Details.USERNAME)
                .removeDetail(Details.EMAIL)
                .error("invalid_registration").assertEvent();
    }

    @Test
    public void registerUserManyErrors() {
        loginPage.open();
        loginPage.clickRegister();
        registerPage.assertCurrent();

        registerPage.register(null, null, null, null, null, null);

        registerPage.assertCurrent();

        assertEquals("Please specify username.\n" +
                "Please specify first name.\n" +
                "Please specify last name.\n" +
                "Please specify email.\n" +
                "Please specify password.", registerPage.getError());

        events.expectRegister(null, "registerUserMissingUsername@email")
                .removeDetail(Details.USERNAME)
                .removeDetail(Details.EMAIL)
                .error("invalid_registration").assertEvent();
    }

    @Test
    public void registerUserMissingEmail() {
        loginPage.open();
        loginPage.clickRegister();
        registerPage.assertCurrent();

        registerPage.register("firstName", "lastName", null, "registerUserMissingEmail", "password", "password");
        registerPage.assertCurrent();
        assertEquals("Please specify email.", registerPage.getError());
        events.expectRegister("registerUserMissingEmail", null)
                .removeDetail("email")
                .error("invalid_registration").assertEvent();
    }

    @Test
    public void registerUserInvalidEmail() {
        loginPage.open();
        loginPage.clickRegister();
        registerPage.assertCurrent();

        registerPage.register("firstName", "lastName", "registerUserInvalidEmailemail", "registerUserInvalidEmail", "password", "password");
        registerPage.assertCurrent();
        assertEquals("registerUserInvalidEmailemail", registerPage.getEmail());
        assertEquals("Invalid email address.", registerPage.getError());
        events.expectRegister("registerUserInvalidEmail", "registerUserInvalidEmailemail")
                .error("invalid_registration").assertEvent();
    }

    @Test
    public void registerUserSuccess() {
        loginPage.open();
        loginPage.clickRegister();
        registerPage.assertCurrent();

        registerPage.register("firstName", "lastName", "registerUserSuccess@email", "registerUserSuccess", "password", "password");

        assertEquals(RequestType.AUTH_RESPONSE, appPage.getRequestType());

        String userId = events.expectRegister("registerUserSuccess", "registerUserSuccess@email").assertEvent().getUserId();
        events.expectLogin().detail("username", "registerusersuccess").user(userId).assertEvent();

        UserModel user = getUser(userId);
        Assert.assertNotNull(user);
        Assert.assertNotNull(user.getCreatedTimestamp());
        // test that timestamp is current with 10s tollerance
        Assert.assertTrue((System.currentTimeMillis() - user.getCreatedTimestamp()) < 10000);
        // test user info is set from form
        assertEquals("registerusersuccess", user.getUsername());
        assertEquals("registerusersuccess@email", user.getEmail());
        assertEquals("firstName", user.getFirstName());
        assertEquals("lastName", user.getLastName());
    }

    protected UserModel getUser(String userId) {
        KeycloakSession samlServerSession = keycloakRule.startSession();
        try {
            RealmModel brokerRealm = samlServerSession.realms().getRealm("test");
            return samlServerSession.users().getUserById(userId, brokerRealm);
        } finally {
            keycloakRule.stopSession(samlServerSession, false);
        }
    }

    @Test
    public void registerExistingUser_emailAsUsername() {
        configureRelamRegistrationEmailAsUsername(true);

        try {
            loginPage.open();
            loginPage.clickRegister();
            registerPage.assertCurrent();

            registerPage.registerWithEmailAsUsername("firstName", "lastName", "test-user@localhost", "password", "password");

            registerPage.assertCurrent();
            assertEquals("Email already exists.", registerPage.getError());

            events.expectRegister("test-user@localhost", "test-user@localhost").user((String) null).error("email_in_use").assertEvent();
        } finally {
            configureRelamRegistrationEmailAsUsername(false);
        }
    }

    @Test
    public void registerUserMissingOrInvalidEmail_emailAsUsername() {
        configureRelamRegistrationEmailAsUsername(true);

        try {
            loginPage.open();
            loginPage.clickRegister();
            registerPage.assertCurrent();

            registerPage.registerWithEmailAsUsername("firstName", "lastName", null, "password", "password");
            registerPage.assertCurrent();
            assertEquals("Please specify email.", registerPage.getError());
            events.expectRegister(null, null).removeDetail("username").removeDetail("email").error("invalid_registration").assertEvent();

            registerPage.registerWithEmailAsUsername("firstName", "lastName", "registerUserInvalidEmailemail", "password", "password");
            registerPage.assertCurrent();
            assertEquals("Invalid email address.", registerPage.getError());
            events.expectRegister("registerUserInvalidEmailemail", "registerUserInvalidEmailemail").error("invalid_registration").assertEvent();
        } finally {
            configureRelamRegistrationEmailAsUsername(false);
        }
    }

    @Test
    public void registerUserSuccess_emailAsUsername() {
        configureRelamRegistrationEmailAsUsername(true);
        
        try {
            loginPage.open();
            loginPage.clickRegister();
            registerPage.assertCurrent();

            registerPage.registerWithEmailAsUsername("firstName", "lastName", "registerUserSuccessE@email", "password", "password");

            assertEquals(RequestType.AUTH_RESPONSE, appPage.getRequestType());

            String userId = events.expectRegister("registerUserSuccessE@email", "registerUserSuccessE@email").assertEvent().getUserId();
            events.expectLogin().detail("username", "registerusersuccesse@email").user(userId).assertEvent();

            UserModel user = getUser(userId);
            Assert.assertNotNull(user);
            Assert.assertNotNull(user.getCreatedTimestamp());
            // test that timestamp is current with 10s tollerance
            Assert.assertTrue((System.currentTimeMillis() - user.getCreatedTimestamp()) < 10000);

        } finally {
            configureRelamRegistrationEmailAsUsername(false);
        }
    }

    protected void configureRelamRegistrationEmailAsUsername(final boolean value) {
        keycloakRule.configure(new KeycloakRule.KeycloakSetup() {
            @Override
            public void config(RealmManager manager, RealmModel adminstrationRealm, RealmModel appRealm) {
                appRealm.setRegistrationEmailAsUsername(value);
            }
        });
    }

}
