/*
 * Copyright (c) InWorldz Halcyon Developers
 * Copyright (c) Contributors, http://opensimulator.org/
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSim Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Framework.Communications.Messages;

namespace OpenSim.Region.Framework.Interfaces
{
    public enum ChildAgentUpdate2Response
    {
        MethodNotAvailalble,
        Error,
        Ok,
        AccessDenied
    }

    public delegate bool ChildAgentUpdateReceived(AgentData data);

    public interface IInterregionCommsOut
    {
        #region Agents

        bool SendCreateChildAgent(ulong regionHandle, AgentCircuitData aCircuit, bool authorize, out string reason);

        /// <summary>
        /// Full child agent update.
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        bool SendChildAgentUpdate(ulong regionHandle, AgentData data);

        /// <summary>
        /// Full child agent update with serialized attachments for a crossing or TP
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        ChildAgentUpdate2Response SendChildAgentUpdate2(SimpleRegionInfo regionInfo, AgentData data);


        /// <summary>
        /// Short child agent update, mostly for position.
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        bool SendChildAgentUpdate(ulong regionHandle, AgentPosition data);

        bool SendRetrieveRootAgent(ulong regionHandle, UUID id, out IAgentData agent);

        /// <summary>
        /// Message from receiving region to departing region, telling it got contacted by the client.
        /// When sent over REST, it invokes the opaque uri.
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="id"></param>
        /// <param name="uri"></param>
        /// <returns></returns>
        bool SendReleaseAgent(ulong regionHandle, UUID id, string uri);

        /// <summary>
        /// Close agent.
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="id"></param>
        /// <returns></returns>
        bool SendCloseAgent(ulong regionHandle, UUID id);

        /// <summary>
        /// Close agent.
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="id"></param>
        /// <returns></returns>
        Task<bool> SendCloseAgentAsync(SimpleRegionInfo regionInfo, UUID id);

        /// <summary>
        /// Creates a remote presence on the destination region
        /// </summary>
        /// <param name="regionInfo"></param>
        /// <param name="aCircuit"></param>
        /// <returns></returns>
        Task<Tuple<bool, string>> SendCreateRemoteChildAgentAsync(SimpleRegionInfo regionInfo, AgentCircuitData aCircuit);

        #endregion Agents

        #region Objects

        /// <summary>
        /// Create an object in the destination region. This message is used primarily for prim crossing.
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="sog"></param>
        /// <param name="isLocalCall"></param>
        /// <returns></returns>
        bool SendCreateObject(ulong regionHandle, SceneObjectGroup sog, List<UUID> avatars, bool isLocalCall, Vector3 posInOtherRegion, bool isAttachment);

        /// <summary>
        /// Create an object from the user's inventory in the destination region. 
        /// This message is used primarily by clients.
        /// </summary>
        /// <param name="regionHandle"></param>
        /// <param name="userID"></param>
        /// <param name="itemID"></param>
        /// <returns></returns>
        bool SendCreateObject(ulong regionHandle, UUID userID, UUID itemID);

        #endregion Objects

        #region Regions

        bool SendUpdateEstateInfo(UUID regionID);

        #endregion Regions
    }

    // This may not be needed, but having it here for now.
    public interface IInterregionCommsIn
    {
        event ChildAgentUpdateReceived OnChildAgentUpdate;
    }

}
