/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.brooklyn.core.entity;

import java.net.URI;
import java.util.List;
import java.util.Map;

import org.apache.brooklyn.api.mgmt.ManagementContext;
import org.apache.brooklyn.api.sensor.AttributeSensor;
import org.apache.brooklyn.api.sensor.Sensor;
import org.apache.brooklyn.core.config.render.RendererHints;
import org.apache.brooklyn.core.entity.lifecycle.Lifecycle;
import org.apache.brooklyn.core.sensor.BasicAttributeSensor;
import org.apache.brooklyn.core.sensor.BasicAttributeSensorAndConfigKey;
import org.apache.brooklyn.core.sensor.BasicNotificationSensor;
import org.apache.brooklyn.core.sensor.PortAttributeSensorAndConfigKey;
import org.apache.brooklyn.core.sensor.Sensors;
import org.apache.brooklyn.util.net.UserAndHostAndPort;

import com.google.common.annotations.Beta;
import com.google.common.collect.ImmutableList;
import com.google.common.reflect.TypeToken;

/**
 * This interface should be used to access {@link Sensor} definitions.
 */
public interface Attributes {

    AttributeSensor<String> ENTITY_ID = Sensors.newStringSensor("entity.id");
    AttributeSensor<String> APPLICATION_ID = Sensors.newStringSensor("application.id");
    AttributeSensor<String> CATALOG_ID = Sensors.newStringSensor("catalog.id");

    BasicNotificationSensor<Void> LOCATION_CHANGED = new BasicNotificationSensor<Void>(
            Void.class, "entity.locationChanged", "Indicates that an entity's location has been changed");

    // TODO these should switch to being TemplatedStringAttributeSensorAndConfigKey
    BasicAttributeSensorAndConfigKey<String> DOWNLOAD_URL = new BasicAttributeSensorAndConfigKey<String>(
            String.class, 
            "download.url", 
            "URL for downloading the installer; uses FreeMarker templating format to substitute things like ${version} automatically");

    @SuppressWarnings({ "unchecked", "rawtypes" })
    BasicAttributeSensorAndConfigKey<Map<String,String>> DOWNLOAD_ADDON_URLS = new BasicAttributeSensorAndConfigKey(
            Map.class, 
            "download.addon.urls", 
            "URL for downloading named add-ons; uses FreeMarker templating format to substitute things like ${version} automatically");

    /*
     * Port number attributes.
     */

    @SuppressWarnings({ "unchecked", "rawtypes" })
    AttributeSensor<List<Integer>> PORT_NUMBERS = new BasicAttributeSensor(
            List.class, "port.list", "List of port numbers");
    
    @SuppressWarnings({ "unchecked", "rawtypes" })
    AttributeSensor<List<Sensor<Integer>>> PORT_SENSORS = new BasicAttributeSensor(
            List.class, "port.list.sensors", "List of port number attributes");

    PortAttributeSensorAndConfigKey HTTP_PORT = new PortAttributeSensorAndConfigKey(
            "http.port", "HTTP port", ImmutableList.of(8080,"18080+"));
    
    PortAttributeSensorAndConfigKey HTTPS_PORT = new PortAttributeSensorAndConfigKey(
            "https.port", "HTTPS port (with SSL/TLS)", ImmutableList.of(8443,"18443+"));
                    
    PortAttributeSensorAndConfigKey SSH_PORT = new PortAttributeSensorAndConfigKey("ssh.port", "SSH port", 22);
    PortAttributeSensorAndConfigKey SMTP_PORT = new PortAttributeSensorAndConfigKey("smtp.port", "SMTP port", 25);
    PortAttributeSensorAndConfigKey DNS_PORT = new PortAttributeSensorAndConfigKey("dns.port", "DNS port", 53);
    PortAttributeSensorAndConfigKey AMQP_PORT = new PortAttributeSensorAndConfigKey("amqp.port", "AMQP port", "5672+");

    /*
     * Location/connection attributes.
     */

    AttributeSensor<String> HOSTNAME = Sensors.newStringSensor( "host.name", "Host name");
    AttributeSensor<String> ADDRESS = Sensors.newStringSensor( "host.address", "Host IP address");
    AttributeSensor<UserAndHostAndPort> SSH_ADDRESS = Sensors.newSensor(
            UserAndHostAndPort.class, 
            "host.sshAddress", 
            "user@host:port for ssh'ing (or null if inappropriate)");
    AttributeSensor<UserAndHostAndPort> WINRM_ADDRESS = Sensors.newSensor(
            UserAndHostAndPort.class, 
            "host.winrmAddress", 
            "user@host:port for WinRM'ing (or null if inappropriate)");
    AttributeSensor<String> SUBNET_HOSTNAME = Sensors.newStringSensor(
            "host.subnet.hostname",
            "Host name as known internally in the subnet where it is running (if different to host.name)");
    AttributeSensor<String> SUBNET_ADDRESS = Sensors.newStringSensor(
            "host.subnet.address",
            "Host address as known internally in the subnet where it is running (if different to host.name)");

    /** @deprecated since 0.11.0 without replacement */
    @Deprecated
    AttributeSensor<String> HOST_AND_PORT = Sensors.newStringSensor( "hostandport", "host:port" );

    /*
     * Lifecycle attributes
     */
    AttributeSensor<Boolean> SERVICE_UP = Sensors.newBooleanSensor("service.isUp", 
            "Whether the service is active and availability (confirmed and monitored)");
    
    @SuppressWarnings("serial")
    AttributeSensor<Map<String,Object>> SERVICE_NOT_UP_INDICATORS = Sensors.newSensor(
        new TypeToken<Map<String,Object>>() {},
        "service.notUp.indicators", 
        "A map of namespaced indicators that the service is not up");
    
    @SuppressWarnings("serial")
    AttributeSensor<Map<String,Object>> SERVICE_PROBLEMS = Sensors.newSensor(
        new TypeToken<Map<String,Object>>() {},
        "service.problems", 
        "A map of namespaced indicators of problems with a service");

    /**
     * @since 0.8.0
     */
    @SuppressWarnings("serial")
    AttributeSensor<Map<String,Object>> SERVICE_NOT_UP_DIAGNOSTICS = Sensors.newSensor(
        new TypeToken<Map<String,Object>>() {},
        "service.notUp.diagnostics", 
        "A map of namespaced diagnostics, from when the service is not up");
    
    AttributeSensor<Lifecycle> SERVICE_STATE_ACTUAL = Sensors.newSensor(Lifecycle.class,
            "service.state", "Actual lifecycle state of the service");
    AttributeSensor<Lifecycle.Transition> SERVICE_STATE_EXPECTED = Sensors.newSensor(Lifecycle.Transition.class,
            "service.state.expected", "Last controlled change to service state, indicating what the expected state should be");
    
    /*
     * Other metadata (optional)
     */
    
    AttributeSensor<Integer> PID = Sensors.newIntegerSensor("pid", "Process ID for the previously launched instance");

    AttributeSensor<String> LOG_FILE_LOCATION = Sensors.newStringSensor("log.location", "Log file location");
    
    AttributeSensor<URI> MAIN_URI = MainUri.MAIN_URI;
    AttributeSensor<URI> MAIN_URI_MAPPED_SUBNET = MainUri.MAIN_URI_MAPPED_SUBNET;
    AttributeSensor<URI> MAIN_URI_MAPPED_PUBLIC = MainUri.MAIN_URI_MAPPED_PUBLIC;

    // this class is added because the MAIN_URI relies on a static initialization which unfortunately can't be added to an interface.
    class MainUri {
        private final static AttributeSensor<URI> MAIN_URI = Sensors.newSensor(URI.class, "main.uri", "Main URI for contacting the service/endpoint offered by this entity");
        private final static AttributeSensor<URI> MAIN_URI_MAPPED_SUBNET = Sensors.newSensor(URI.class, "main.uri.mapped.subnet", "Main URI for contacting the service/endpoint offered by this entity from the same subnet");
        private final static AttributeSensor<URI> MAIN_URI_MAPPED_PUBLIC = Sensors.newSensor(URI.class, "main.uri.mapped.public", "Main URI for contacting the service/endpoint offered by this entity from the outside world");

        static {
            RendererHints.register(MAIN_URI, RendererHints.namedActionWithUrl());
            RendererHints.register(MAIN_URI_MAPPED_SUBNET, RendererHints.namedActionWithUrl());
            RendererHints.register(MAIN_URI_MAPPED_PUBLIC, RendererHints.namedActionWithUrl());
        }
    }

    /*
     * Brooklyn management attributes (optional)
     */

    /**
     * Used by entities registering a {@link ManagementContext.PropertiesReloadListener} to store a persistent
     * reference to it, for use when unregistering the listener.
     */
    @Beta
    AttributeSensor<ManagementContext.PropertiesReloadListener> PROPERTIES_RELOAD_LISTENER = Sensors.newSensor(
            ManagementContext.PropertiesReloadListener.class,
            "brooklyn.management.propertiesReloadListener", "Properties reload listener");

}
