/*

 * Copyright (c) Contributors, http://aurora-sim.org/, 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 Aurora-Sim 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.Linq;

using Aurora.Framework.Modules;

using Aurora.Framework.PresenceInfo;

using OpenMetaverse;



namespace Aurora.Framework.SceneInfo

{

    public class UndoState

    {

        public Vector3 Position = Vector3.Zero;

        public Quaternion Rotation = Quaternion.Identity;

        public Vector3 Scale = Vector3.Zero;



        public UndoState(ISceneChildEntity part)

        {

            if (part != null)

            {

                if (part.UUID == part.ParentEntity.UUID)

                {

                    Position = part.ParentEntity.AbsolutePosition;

                    Rotation = part.GetRotationOffset();

                    Scale = part.Shape.Scale;

                }

                else

                {

                    Position = part.OffsetPosition;

                    Rotation = part.GetRotationOffset();

                    Scale = part.Shape.Scale;

                }

            }

        }



        public bool Compare(ISceneChildEntity part)

        {

            if (part != null)

            {

                if (part.UUID == part.ParentEntity.UUID)

                {

                    if (Position == part.AbsolutePosition && Rotation == part.GetRotationOffset() &&

                        Scale == part.Shape.Scale)

                        return true;

                    else

                        return false;

                }

                else

                {

                    if (Position == part.OffsetPosition && Rotation == part.GetRotationOffset() &&

                        Scale == part.Shape.Scale)

                        return true;

                    else

                        return false;

                }

            }

            return false;

        }



        public void PlaybackState(ISceneChildEntity part)

        {

            if (part != null)

            {

                part.Undoing = true;



                bool ChangedScale = false;

                bool ChangedRot = false;

                bool ChangedPos = false;



                if (part.UUID == part.ParentEntity.UUID)

                {

                    if (Position != Vector3.Zero)

                    {

                        ChangedPos = true;

                        part.ParentEntity.AbsolutePosition = Position;

                    }

                    ChangedRot = true;

                    part.SetRotationOffset(true, Rotation, true);

                    if (Scale != Vector3.Zero)

                    {

                        ChangedScale = true;

                        part.Scale = Scale;

                    }



                    foreach (

                        ISceneChildEntity child in

                            part.ParentEntity.ChildrenEntities().Where(child => child.UUID != part.UUID))

                    {

                        child.Undo(); //No updates here, child undo will do it on their own

                    }

                }

                else

                {

                    if (Position != Vector3.Zero)

                    {

                        ChangedPos = true;

                        part.FixOffsetPosition(Position, false);

                    }

                    ChangedRot = true;

                    part.UpdateRotation(Rotation);

                    if (Scale != Vector3.Zero)

                    {

                        ChangedScale = true;

                        part.Resize(Scale);

                    }

                }

                part.Undoing = false;

                part.ScheduleUpdate((ChangedScale ? PrimUpdateFlags.Shape : PrimUpdateFlags.None) |

                                    (ChangedPos ? PrimUpdateFlags.Position : PrimUpdateFlags.None) |

                                    (ChangedRot ? PrimUpdateFlags.Rotation : PrimUpdateFlags.None));

            }

        }



        public void PlayfwdState(ISceneChildEntity part)

        {

            if (part != null)

            {

                bool ChangedScale = false;

                bool ChangedRot = false;

                bool ChangedPos = false;

                part.Undoing = true;



                if (part.UUID == part.ParentEntity.UUID)

                {

                    if (Position != Vector3.Zero)

                    {

                        ChangedPos = true;

                        part.ParentEntity.AbsolutePosition = Position;

                    }

                    if (Rotation != Quaternion.Identity)

                    {

                        ChangedRot = true;

                        part.UpdateRotation(Rotation);

                    }

                    if (Scale != Vector3.Zero)

                    {

                        ChangedScale = true;

                        part.Resize(Scale);

                    }



                    foreach (

                        ISceneChildEntity child in

                            part.ParentEntity.ChildrenEntities().Where(child => child.UUID != part.UUID))

                    {

                        child.Redo(); //No updates here, child redo will do it on their own

                    }

                }

                else

                {

                    if (Position != Vector3.Zero)

                    {

                        ChangedPos = true;

                        part.FixOffsetPosition(Position, false);

                    }

                    if (Rotation != Quaternion.Identity)

                    {

                        ChangedRot = true;

                        part.ParentEntity.Rotation = (Rotation);

                    }

                    if (Scale != Vector3.Zero)

                    {

                        ChangedScale = true;

                        part.Resize(Scale);

                    }

                }



                part.ScheduleUpdate((ChangedScale ? PrimUpdateFlags.Shape : PrimUpdateFlags.None) |

                                    (ChangedPos ? PrimUpdateFlags.Position : PrimUpdateFlags.None) |

                                    (ChangedRot ? PrimUpdateFlags.Rotation : PrimUpdateFlags.None));

                part.Undoing = false;

            }

        }

    }



    public class LandUndoState

    {

        public ITerrainChannel m_terrainChannel;

        public ITerrainModule m_terrainModule;



        public LandUndoState(ITerrainModule terrainModule, ITerrainChannel terrainChannel)

        {

            m_terrainModule = terrainModule;

            m_terrainChannel = terrainChannel;

        }



        public bool Compare(ITerrainChannel terrainChannel)

        {

            if (m_terrainChannel != terrainChannel)

                return false;

            else

                return false;

        }



        public void PlaybackState()

        {

            m_terrainModule.UndoTerrain(m_terrainChannel);

        }

    }

}