/*
 * Copyright (C) 2021 The Android Open Source Project
 *
 * 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 com.android.bedstead.nene.users;

import static android.Manifest.permission.CREATE_USERS;
import static android.os.Build.VERSION_CODES.Q;
import static android.os.Build.VERSION_CODES.S;

import static com.android.bedstead.harrier.OptionalBoolean.FALSE;

import static com.google.common.truth.Truth.assertThat;

import static org.testng.Assert.assertThrows;

import android.content.Context;
import android.os.Process;
import android.os.UserHandle;
import android.os.UserManager;

import com.android.bedstead.harrier.BedsteadJUnit4;
import com.android.bedstead.harrier.DeviceState;
import com.android.bedstead.harrier.annotations.EnsureHasPermission;
import com.android.bedstead.harrier.annotations.EnsureHasSecondaryUser;
import com.android.bedstead.harrier.annotations.EnsureHasWorkProfile;
import com.android.bedstead.harrier.annotations.EnsurePasswordNotSet;
import com.android.bedstead.harrier.annotations.RequireRunNotOnSecondaryUser;
import com.android.bedstead.harrier.annotations.RequireRunOnPrimaryUser;
import com.android.bedstead.harrier.annotations.RequireRunOnWorkProfile;
import com.android.bedstead.harrier.annotations.RequireSdkVersion;
import com.android.bedstead.nene.TestApis;
import com.android.bedstead.nene.exceptions.NeneException;

import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(BedsteadJUnit4.class)
public class UserReferenceTest {
    private static final int NON_EXISTING_USER_ID = 10000;
    private static final int USER_ID = NON_EXISTING_USER_ID;
    public static final UserHandle USER_HANDLE = new UserHandle(USER_ID);
    private static final String TEST_ACTIVITY_NAME = "com.android.bedstead.nene.test.Activity";
    private static final Context sContext = TestApis.context().instrumentedContext();
    private static final UserManager sUserManager = sContext.getSystemService(UserManager.class);
    private static final String PASSWORD = "1234";
    private static final String DIFFERENT_PASSWORD = "2345";

    @ClassRule @Rule
    public static final DeviceState sDeviceState = new DeviceState();

    @Test
    public void of_returnsUserReferenceWithValidId() {
        assertThat(UserReference.of(USER_HANDLE)).isEqualTo(USER_ID);
    }

    @Test
    public void id_returnsId() {
        assertThat(TestApis.users().find(USER_ID).id()).isEqualTo(USER_ID);
    }

    @Test
    public void userHandle_referencesId() {
        assertThat(TestApis.users().find(USER_ID).userHandle().getIdentifier()).isEqualTo(USER_ID);
    }

    @Test
    public void exists_doesNotExist_returnsFalse() {
        assertThat(TestApis.users().find(NON_EXISTING_USER_ID).exists()).isFalse();
    }

    @Test
    @EnsureHasSecondaryUser
    public void exists_doesExist_returnsTrue() {
        assertThat(sDeviceState.secondaryUser().exists()).isTrue();
    }

    @Test
    public void remove_userDoesNotExist_throwsException() {
        assertThrows(NeneException.class, () -> TestApis.users().find(USER_ID).remove());
    }

    @Test
    public void remove_userExists_removesUser() {
        UserReference user = TestApis.users().createUser().create();

        user.remove();

        assertThat(TestApis.users().all()).doesNotContain(user);
    }

    @Test
    public void start_userDoesNotExist_throwsException() {
        assertThrows(NeneException.class,
                () -> TestApis.users().find(NON_EXISTING_USER_ID).start());
    }

    @Test
    public void start_userNotStarted_userIsUnlocked() {
        UserReference user = TestApis.users().createUser().create().stop();

        user.start();

        try {
            assertThat(user.isUnlocked()).isTrue();
        } finally {
            user.remove();
        }
    }

    @Test
    @EnsureHasSecondaryUser
    public void start_userAlreadyStarted_doesNothing() {
        sDeviceState.secondaryUser().start();

        sDeviceState.secondaryUser().start();

        assertThat(sDeviceState.secondaryUser().isUnlocked()).isTrue();
    }

    @Test
    public void stop_userDoesNotExist_doesNothing() {
        TestApis.users().find(NON_EXISTING_USER_ID).stop();
    }

    @Test
    @EnsureHasSecondaryUser
    @RequireRunNotOnSecondaryUser
    public void stop_userStarted_userIsStopped() {
        sDeviceState.secondaryUser().stop();

        assertThat(sDeviceState.secondaryUser().isRunning()).isFalse();
    }

    @Test
    @EnsureHasSecondaryUser
    @RequireRunNotOnSecondaryUser
    public void stop_userNotStarted_doesNothing() {
        sDeviceState.secondaryUser().stop();

        sDeviceState.secondaryUser().stop();

        assertThat(sDeviceState.secondaryUser().isRunning()).isFalse();
    }

    @Test
    @EnsureHasSecondaryUser
    @RequireRunNotOnSecondaryUser
    @RequireSdkVersion(min = Q)
    public void switchTo_userIsSwitched() {
        sDeviceState.secondaryUser().switchTo();

        assertThat(TestApis.users().current()).isEqualTo(sDeviceState.secondaryUser());
    }

    @Test
    @RequireRunOnWorkProfile(switchedToParentUser = FALSE)
    public void switchTo_profile_switchesToParent() {
        sDeviceState.workProfile().switchTo();

        assertThat(TestApis.users().current()).isEqualTo(sDeviceState.workProfile().parent());
    }

    @Test
    @RequireRunOnPrimaryUser
    @EnsureHasWorkProfile
    public void stop_isWorkProfileOfCurrentUser_stops() {
        sDeviceState.workProfile().stop();

        assertThat(sDeviceState.workProfile().isRunning()).isFalse();
    }

    @Test
    public void serialNo_returnsSerialNo() {
        UserReference user = TestApis.users().instrumented();

        assertThat(user.serialNo())
                .isEqualTo(sUserManager.getSerialNumberForUser(Process.myUserHandle()));
    }

    @Test
    public void serialNo_userDoesNotExist_throwsException() {
        UserReference user = TestApis.users().find(NON_EXISTING_USER_ID);

        assertThrows(NeneException.class, user::serialNo);
    }

    @Test
    @EnsureHasPermission(CREATE_USERS)
    @RequireSdkVersion(min = S, reason = "getUserName is only available on S+")
    public void name_returnsName() {
        UserReference user = TestApis.users().instrumented();

        assertThat(user.name()).isEqualTo(sUserManager.getUserName());
    }

    @Test
    public void name_userDoesNotExist_throwsException() {
        UserReference user = TestApis.users().find(NON_EXISTING_USER_ID);

        assertThrows(NeneException.class, user::name);
    }

    @Test
    @EnsureHasPermission(CREATE_USERS)
    @RequireSdkVersion(min = S, reason = "getUserType is only available on S+")
    public void type_returnsType() {
        UserReference user = TestApis.users().instrumented();

        assertThat(user.type().name()).isEqualTo(sUserManager.getUserType());
    }

    @Test
    public void type_userDoesNotExist_throwsException() {
        UserReference user = TestApis.users().find(NON_EXISTING_USER_ID);

        assertThrows(NeneException.class, user::type);
    }

    @Test
    @RequireRunOnPrimaryUser
    public void isPrimary_isPrimary_returnsTrue() {
        UserReference user = TestApis.users().instrumented();

        assertThat(user.isPrimary()).isTrue();
    }

    @Test
    @RequireRunOnPrimaryUser
    @EnsureHasSecondaryUser
    public void isPrimary_isNotPrimary_returnsFalse() {
        UserReference user = sDeviceState.secondaryUser();

        assertThat(user.isPrimary()).isFalse();
    }

    @Test
    public void isPrimary_userDoesNotExist_throwsException() {
        UserReference user = TestApis.users().find(NON_EXISTING_USER_ID);

        assertThrows(NeneException.class, user::isPrimary);
    }

    @Test
    public void isRunning_userNotStarted_returnsFalse() {
        UserReference user = TestApis.users().createUser().create();
        user.stop();

        try {
            assertThat(user.isRunning()).isFalse();
        } finally {
            user.remove();
        }
    }

    @Test
    public void isRunning_userIsRunning_returnsTrue() {
        UserReference user = TestApis.users().createUser().create();
        user.start();

        try {
            assertThat(user.isRunning()).isTrue();
        } finally {
            user.remove();
        }
    }

    @Test
    public void isRunning_userDoesNotExist_returnsFalse() {
        UserReference user = TestApis.users().find(NON_EXISTING_USER_ID);

        assertThat(user.isRunning()).isFalse();
    }

    @Test
    public void isUnlocked_userIsUnlocked_returnsTrue() {
        UserReference user = TestApis.users().createUser().createAndStart();

        try {
            assertThat(user.isUnlocked()).isTrue();
        } finally {
            user.remove();
        }
    }

    // TODO(b/203542772): add tests for locked state

    @Test
    public void isUnlocked_userDoesNotExist_returnsFalse() {
        UserReference user = TestApis.users().find(NON_EXISTING_USER_ID);

        assertThat(user.isUnlocked()).isFalse();
    }

    @Test
    @EnsureHasWorkProfile
    public void parent_returnsParent() {
        assertThat(sDeviceState.workProfile().parent()).isNotNull();
    }

    @Test
    @RequireRunOnPrimaryUser
    public void parent_noParent_returnsNull() {
        UserReference user = TestApis.users().instrumented();

        assertThat(user.parent()).isNull();
    }

    @Test
    @RequireRunOnPrimaryUser
    public void parent_userDoesNotExist_throwsException() {
        UserReference user = TestApis.users().find(NON_EXISTING_USER_ID);

        assertThrows(NeneException.class, user::parent);
    }

    @Test
    public void autoclose_removesUser() {
        int numUsers = TestApis.users().all().size();

        try (UserReference user = TestApis.users().createUser().create()) {
            // We intentionally don't do anything here, just rely on the auto-close behaviour
        }

        assertThat(TestApis.users().all()).hasSize(numUsers);
    }

    @Test
    @EnsurePasswordNotSet
    public void setPassword_hasPassword() {
        try {
            TestApis.users().instrumented().setPassword(PASSWORD);

            assertThat(TestApis.users().instrumented().hasPassword()).isTrue();
        } finally {
            TestApis.users().instrumented().clearPassword(PASSWORD);
        }
    }

    @Test
    @EnsurePasswordNotSet
    public void clearPassword_doesNotHavePassword() {
        TestApis.users().instrumented().setPassword(PASSWORD);
        TestApis.users().instrumented().clearPassword(PASSWORD);

        assertThat(TestApis.users().instrumented().hasPassword()).isFalse();
    }

    @Test
    @EnsurePasswordNotSet
    public void clearPassword_doesNotHavePassword_doesNothing() {
        TestApis.users().instrumented().clearPassword(PASSWORD);

        assertThat(TestApis.users().instrumented().hasPassword()).isFalse();
    }

    @Test
    @EnsurePasswordNotSet
    public void clearPassword_incorrectOldPassword_throwsException() {
        try {
            TestApis.users().instrumented().setPassword(PASSWORD);

            assertThrows(NeneException.class,
                    () -> TestApis.users().instrumented().clearPassword(DIFFERENT_PASSWORD));
        } finally {
            TestApis.users().instrumented().clearPassword(PASSWORD);
        }
    }

    @Test
    @EnsurePasswordNotSet
    public void setPassword_alreadyHasPassword_throwsException() {
        try {
            TestApis.users().instrumented().setPassword(PASSWORD);

            assertThrows(NeneException.class,
                    () -> TestApis.users().instrumented().setPassword(DIFFERENT_PASSWORD));
        } finally {
            TestApis.users().instrumented().clearPassword(PASSWORD);
        }
    }
}