/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * 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;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * 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.Collections.Generic;
using OpenMetaverse;
using OpenMetaverse.Packets;
using OpenSim.Framework;

namespace OpenSim.Region.Environment.Scenes
{
    public partial class Scene
    {
        protected void SimChat(byte[] message, ChatTypeEnum type, int channel, Vector3 fromPos, string fromName,
                               UUID fromID, bool fromAgent, bool broadcast)
        {
            OSChatMessage args = new OSChatMessage();

            args.Message = Utils.BytesToString(message);
            args.Channel = channel;
            args.Type = type;
            args.Position = fromPos;
            args.SenderUUID = fromID;
            args.Scene = this;

            if (fromAgent)
            {
                ScenePresence user = GetScenePresence(fromID);
                if (user != null)
                    args.Sender = user.ControllingClient;
            }
            else
            {
                SceneObjectPart obj = GetSceneObjectPart(fromID);
                args.SenderObject = obj;
            }

            args.From = fromName;
            //args.

            if (broadcast)
                EventManager.TriggerOnChatBroadcast(this, args);
            else
                EventManager.TriggerOnChatFromWorld(this, args);

        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="message"></param>
        /// <param name="type"></param>
        /// <param name="fromPos"></param>
        /// <param name="fromName"></param>
        /// <param name="fromAgentID"></param>
        public void SimChat(byte[] message, ChatTypeEnum type, int channel, Vector3 fromPos, string fromName,
                            UUID fromID, bool fromAgent)
        {
            SimChat(message, type, channel, fromPos, fromName, fromID, fromAgent, false);
        }

        /// <summary>
        ///
        /// </summary>
        /// <param name="message"></param>
        /// <param name="type"></param>
        /// <param name="fromPos"></param>
        /// <param name="fromName"></param>
        /// <param name="fromAgentID"></param>
        public void SimChatBroadcast(byte[] message, ChatTypeEnum type, int channel, Vector3 fromPos, string fromName,
                                     UUID fromID, bool fromAgent)
        {
            SimChat(message, type, channel, fromPos, fromName, fromID, fromAgent, true);
        }

        /// <summary>
        /// Invoked when the client selects a prim.
        /// </summary>
        /// <param name="primLocalID"></param>
        /// <param name="remoteClient"></param>
        public void SelectPrim(uint primLocalID, IClientAPI remoteClient)
        {
            List<EntityBase> EntityList = GetEntities();

            foreach (EntityBase ent in EntityList)
            {
                if (ent is SceneObjectGroup)
                {
                    if (((SceneObjectGroup) ent).LocalId == primLocalID)
                    {
                        ((SceneObjectGroup) ent).GetProperties(remoteClient);
                        ((SceneObjectGroup) ent).IsSelected = true;
                        // A prim is only tainted if it's allowed to be edited by the person clicking it.
                        if (ExternalChecks.ExternalChecksCanEditObject(((SceneObjectGroup)ent).UUID, remoteClient.AgentId) 
                            || ExternalChecks.ExternalChecksCanMoveObject(((SceneObjectGroup)ent).UUID, remoteClient.AgentId))
                        {
                            EventManager.TriggerParcelPrimCountTainted();
                        }
                        break;
                    }
                   else 
                   {
                       // We also need to check the children of this prim as they
                       // can be selected as well and send property information
                       bool foundPrim = false;
                       foreach (KeyValuePair<UUID, SceneObjectPart> child in ((SceneObjectGroup) ent).Children)
                       {
                           if (child.Value.LocalId == primLocalID) 
                           {
                               child.Value.GetProperties(remoteClient);
                               foundPrim = true;
                               break;
                           }
                       }
                       if (foundPrim) break;
                   }
                }
            }
        }

        /// <summary>
        /// Handle the deselection of a prim from the client.
        /// </summary>
        /// <param name="primLocalID"></param>
        /// <param name="remoteClient"></param>
        public void DeselectPrim(uint primLocalID, IClientAPI remoteClient)
        {
            SceneObjectPart part = GetSceneObjectPart(primLocalID);
            if (part == null)
                return;
            
            // The prim is in the process of being deleted.
            if (null == part.ParentGroup.RootPart)
                return;
            
            // A deselect packet contains all the local prims being deselected.  However, since selection is still
            // group based we only want the root prim to trigger a full update - otherwise on objects with many prims
            // we end up sending many duplicate ObjectUpdates
            if (part.ParentGroup.RootPart.LocalId != part.LocalId)
                return;

            bool isAttachment = false;
            
            // This is wrong, wrong, wrong. Selection should not be
            // handled by group, but by prim. Legacy cruft.
            // TODO: Make selection flagging per prim!
            //
            part.ParentGroup.IsSelected = false;
            
            if (part.ParentGroup.RootPart.IsAttachment)
                isAttachment = true;
            else
                part.ParentGroup.ScheduleGroupForFullUpdate();

            // If it's not an attachment, and we are allowed to move it,
            // then we might have done so. If we moved across a parcel
            // boundary, we will need to recount prims on the parcels.
            // For attachments, that makes no sense.
            //
            if (!isAttachment)
            {
                if (ExternalChecks.ExternalChecksCanEditObject(
                        part.UUID, remoteClient.AgentId) 
                        || ExternalChecks.ExternalChecksCanMoveObject(
                        part.UUID, remoteClient.AgentId))
                    EventManager.TriggerParcelPrimCountTainted();
            }
        }

        public virtual void ProcessMoneyTransferRequest(UUID source, UUID destination, int amount, 
                                                        int transactiontype, string description)
        {
            EventManager.MoneyTransferArgs args = new EventManager.MoneyTransferArgs(source, destination, amount, 
                                                                                     transactiontype, description);

            EventManager.TriggerMoneyTransfer(this, args);
        }

        public virtual void ProcessParcelBuy(UUID agentId, UUID groupId, bool final, bool groupOwned,
                bool removeContribution, int parcelLocalID, int parcelArea, int parcelPrice, bool authenticated)
        {
            EventManager.LandBuyArgs args = new EventManager.LandBuyArgs(agentId, groupId, final, groupOwned, 
                                                                         removeContribution, parcelLocalID, parcelArea, 
                                                                         parcelPrice, authenticated);

            // First, allow all validators a stab at it
            m_eventManager.TriggerValidateLandBuy(this, args);

            // Then, check validation and transfer
            m_eventManager.TriggerLandBuy(this, args);
        }

        public virtual void ProcessObjectGrab(uint localID, Vector3 offsetPos, IClientAPI remoteClient)
        {

            List<EntityBase> EntityList = GetEntities();

            foreach (EntityBase ent in EntityList)
            {
                if (ent is SceneObjectGroup)
                {
                    SceneObjectGroup obj = ent as SceneObjectGroup;
                    if (obj != null)
                    {
                        // Is this prim part of the group
                        if (obj.HasChildPrim(localID))
                        {
                            // Currently only grab/touch for the single prim
                            // the client handles rez correctly
                            obj.ObjectGrabHandler(localID, offsetPos, remoteClient);

                            SceneObjectPart part = obj.GetChildPart(localID);

                            // If the touched prim handles touches, deliver it
                            // If not, deliver to root prim
                            if ((part.ScriptEvents & scriptEvents.touch_start) != 0)
                                EventManager.TriggerObjectGrab(part.LocalId, 0, part.OffsetPosition, remoteClient);
                            else
                                EventManager.TriggerObjectGrab(obj.RootPart.LocalId, part.LocalId, part.OffsetPosition, remoteClient);

                            return;
                        }
                    }
                }
            }
        }

        public virtual void ProcessObjectDeGrab(uint localID, IClientAPI remoteClient)
        {

            List<EntityBase> EntityList = GetEntities();

            foreach (EntityBase ent in EntityList)
            {
                if (ent is SceneObjectGroup)
                {
                    SceneObjectGroup obj = ent as SceneObjectGroup;

                    // Is this prim part of the group
                    if (obj.HasChildPrim(localID))
                    {
                        SceneObjectPart part=obj.GetChildPart(localID);
                        if (part != null)
                        {
                            // If the touched prim handles touches, deliver it
                            // If not, deliver to root prim
                            if ((part.ScriptEvents & scriptEvents.touch_end) != 0)
                                EventManager.TriggerObjectDeGrab(part.LocalId, 0, remoteClient);
                            else
                                EventManager.TriggerObjectDeGrab(obj.RootPart.LocalId, part.LocalId, remoteClient);

                            return;
                        }
                        return;
                    }
                }
            }
        }

        public void ProcessAvatarPickerRequest(IClientAPI client, UUID avatarID, UUID RequestID, string query)
        {
            //EventManager.TriggerAvatarPickerRequest();

            List<AvatarPickerAvatar> AvatarResponses = new List<AvatarPickerAvatar>();
            AvatarResponses = m_sceneGridService.GenerateAgentPickerRequestResponse(RequestID, query);

            AvatarPickerReplyPacket replyPacket = (AvatarPickerReplyPacket) PacketPool.Instance.GetPacket(PacketType.AvatarPickerReply);
            // TODO: don't create new blocks if recycling an old packet

            AvatarPickerReplyPacket.DataBlock[] searchData =
                new AvatarPickerReplyPacket.DataBlock[AvatarResponses.Count];
            AvatarPickerReplyPacket.AgentDataBlock agentData = new AvatarPickerReplyPacket.AgentDataBlock();

            agentData.AgentID = avatarID;
            agentData.QueryID = RequestID;
            replyPacket.AgentData = agentData;
            //byte[] bytes = new byte[AvatarResponses.Count*32];

            int i = 0;
            foreach (AvatarPickerAvatar item in AvatarResponses)
            {
                UUID translatedIDtem = item.AvatarID;
                searchData[i] = new AvatarPickerReplyPacket.DataBlock();
                searchData[i].AvatarID = translatedIDtem;
                searchData[i].FirstName = Utils.StringToBytes((string) item.firstName);
                searchData[i].LastName = Utils.StringToBytes((string) item.lastName);
                i++;
            }
            if (AvatarResponses.Count == 0)
            {
                searchData = new AvatarPickerReplyPacket.DataBlock[0];
            }
            replyPacket.Data = searchData;

            AvatarPickerReplyAgentDataArgs agent_data = new AvatarPickerReplyAgentDataArgs();
            agent_data.AgentID = replyPacket.AgentData.AgentID;
            agent_data.QueryID = replyPacket.AgentData.QueryID;

            List<AvatarPickerReplyDataArgs> data_args = new List<AvatarPickerReplyDataArgs>();
            for (i = 0; i < replyPacket.Data.Length; i++)
            {
                AvatarPickerReplyDataArgs data_arg = new AvatarPickerReplyDataArgs();
                data_arg.AvatarID = replyPacket.Data[i].AvatarID;
                data_arg.FirstName = replyPacket.Data[i].FirstName;
                data_arg.LastName = replyPacket.Data[i].LastName;
                data_args.Add(data_arg);
            }
            client.SendAvatarPickerReply(agent_data, data_args);
        }

        public void ProcessScriptReset(IClientAPI remoteClient, UUID objectID,
                UUID itemID)
        {
            SceneObjectPart part=GetSceneObjectPart(objectID);
            if (part == null)
                return;

            if (ExternalChecks.ExternalChecksCanResetScript(itemID, remoteClient.AgentId))
            {
                EventManager.TriggerScriptReset(part.LocalId, itemID);
            }
        }
    }
}