/**
 * This file is part of Graylog.
 *
 * Graylog is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Graylog is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Graylog.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.graylog2.alarmcallbacks;

import com.google.common.collect.ImmutableMap;
import org.graylog2.alerts.AlertSender;
import org.graylog2.alerts.EmailRecipients;
import org.graylog2.configuration.EmailConfiguration;
import org.graylog2.notifications.NotificationService;
import org.graylog2.plugin.alarms.callbacks.AlarmCallback;
import org.graylog2.plugin.configuration.Configuration;
import org.graylog2.plugin.configuration.ConfigurationException;
import org.graylog2.plugin.system.NodeId;
import org.graylog2.shared.users.UserService;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

import java.util.Collections;
import java.util.Map;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class EmailAlarmCallbackTest {
    @Rule
    public ExpectedException expectedException = ExpectedException.none();

    private AlertSender alertSender = mock(AlertSender.class);
    private NotificationService notificationService = mock(NotificationService.class);
    private NodeId nodeId = mock(NodeId.class);
    private EmailRecipients.Factory emailRecipientsFactory = mock(EmailRecipients.Factory.class);
    private UserService userService = mock(UserService.class);
    private EmailConfiguration emailConfiguration = mock(EmailConfiguration.class);

    private AlarmCallback alarmCallback;

    @Before
    public void setUp() throws Exception {
        alarmCallback = new EmailAlarmCallback(alertSender, notificationService, nodeId, emailRecipientsFactory,
                userService, emailConfiguration);
    }

    @Test
    public void checkConfigurationSucceedsWithValidConfiguration() throws Exception {
        final Map<String, Object> configMap = ImmutableMap.of(
                "sender", "graylog@example.org",
                "subject", "Graylog alert",
                "body", "foobar",
                "user_receivers", Collections.emptyList(),
                "email_receivers", Collections.emptyList()
        );
        final Configuration configuration = new Configuration(configMap);
        alarmCallback.initialize(configuration);
        alarmCallback.checkConfiguration();
    }

    @Test
    public void checkConfigurationSucceedsWithFallbackSender() throws Exception {
        final Map<String, Object> configMap = ImmutableMap.of(
                "subject", "Graylog alert",
                "body", "foobar",
                "user_receivers", Collections.emptyList(),
                "email_receivers", Collections.emptyList()
        );
        final Configuration configuration = new Configuration(configMap);
        when(emailConfiguration.getFromEmail()).thenReturn("default@sender.org");

        alarmCallback.initialize(configuration);
        alarmCallback.checkConfiguration();
    }

    @Test
    public void checkConfigurationFailsWithoutSender() throws Exception {
        final Map<String, Object> configMap = ImmutableMap.of(
                "subject", "Graylog alert",
                "body", "foobar",
                "user_receivers", Collections.emptyList(),
                "email_receivers", Collections.emptyList()
        );
        final Configuration configuration = new Configuration(configMap);
        alarmCallback.initialize(configuration);

        when(emailConfiguration.getFromEmail()).thenReturn("");

        expectedException.expect(ConfigurationException.class);
        expectedException.expectMessage("Sender or subject are missing or invalid.");

        alarmCallback.checkConfiguration();
    }

    @Test
    public void checkConfigurationFailsWithoutSubject() throws Exception {
        final Map<String, Object> configMap = ImmutableMap.of(
                "sender", "graylog@example.org",
                "body", "foobar",
                "user_receivers", Collections.emptyList(),
                "email_receivers", Collections.emptyList()
        );
        final Configuration configuration = new Configuration(configMap);
        alarmCallback.initialize(configuration);

        expectedException.expect(ConfigurationException.class);
        expectedException.expectMessage("Sender or subject are missing or invalid.");

        alarmCallback.checkConfiguration();
    }
}