using System.Collections.Generic;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Region.Framework.Scenes;

namespace OpenSim.Region.OptionalModules.Scripting.Minimodule
{
    class SOPObject : IObject
    {
        private readonly Scene m_rootScene;
        private readonly uint m_localID;

        public SOPObject(Scene rootScene, uint localID)
        {
            m_rootScene = rootScene;
            m_localID = localID;
        }

        /// <summary>
        /// This needs to run very, very quickly.
        /// It is utilized in nearly every property and method.
        /// </summary>
        /// <returns></returns>
        private SceneObjectPart GetSOP()
        {
            if (m_rootScene.Entities.ContainsKey(m_localID))
                return ((SceneObjectGroup) m_rootScene.Entities[m_localID]).RootPart;

            return null;
        }

        public bool Exists
        {
            get { return GetSOP() != null; }
        }

        public uint LocalID
        {
            get { return m_localID; }
        }

        public UUID GlobalID
        {
            get { return GetSOP().UUID; }
        }

        public string Name
        {
            get { return GetSOP().Name; }
            set { GetSOP().Name = value; }
        }

        public string Description
        {
            get { return GetSOP().Description; }
            set { GetSOP().Description = value; }
        }

        public IObject[] Children
        {
            get
            {
                SceneObjectPart my = GetSOP();
                int total = my.ParentGroup.Children.Count;

                IObject[] rets = new IObject[total];

                int i = 0;
                foreach (KeyValuePair<UUID, SceneObjectPart> pair in my.ParentGroup.Children)
                {
                    rets[i++] = new SOPObject(m_rootScene, pair.Value.LocalId);
                }

                return rets;
            }
        }

        public IObject Root
        {
            get { return new SOPObject(m_rootScene, GetSOP().ParentGroup.RootPart.LocalId); }
        }

        public IObjectMaterial[] Materials
        {
            get
            {
                SceneObjectPart sop = GetSOP();
                IObjectMaterial[] rets = new IObjectMaterial[getNumberOfSides(sop)];

                for (int i = 0; i < rets.Length;i++ )
                {
                    //rets[i] = new ObjectFace 
                }

                return rets;
            }
        }

        public Vector3 Scale
        {
            get { return GetSOP().Scale; }
            set { GetSOP().Scale = value; }
        }

        public Quaternion Rotation
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public Vector3 Position
        {
            get { return GetSOP().AbsolutePosition; }
            set
            {
                SceneObjectPart pos = GetSOP();
                pos.UpdateOffSet(value - pos.AbsolutePosition);
            }
        }

        public Vector3 SitTarget
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public string SitTargetText
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public string TouchText
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public string Text
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsPhysical
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsPhantom
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsRotationLockedX
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsRotationLockedY
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsRotationLockedZ
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsSandboxed
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsImmotile
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsAlwaysReturned
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsTemporary
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public bool IsFlexible
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }

        public PrimType PrimShape
        {
            get { return (PrimType) getScriptPrimType(GetSOP().Shape); }
            set { throw new System.NotImplementedException(); }
        }

        public PhysicsMaterial PhysicsMaterial
        {
            get { throw new System.NotImplementedException(); }
            set { throw new System.NotImplementedException(); }
        }


        #region Supporting Functions

        // Helper functions to understand if object has cut, hollow, dimple, and other affecting number of faces
        private static void hasCutHollowDimpleProfileCut(int primType, PrimitiveBaseShape shape, out bool hasCut, out bool hasHollow,
            out bool hasDimple, out bool hasProfileCut)
        {
            if (primType == (int)PrimType.Box
                ||
                primType == (int)PrimType.Cylinder
                ||
                primType == (int)PrimType.Prism)

                hasCut = (shape.ProfileBegin > 0) || (shape.ProfileEnd > 0);
            else
                hasCut = (shape.PathBegin > 0) || (shape.PathEnd > 0);

            hasHollow = shape.ProfileHollow > 0;
            hasDimple = (shape.ProfileBegin > 0) || (shape.ProfileEnd > 0); // taken from llSetPrimitiveParms
            hasProfileCut = hasDimple; // is it the same thing?

        }

        private static int getScriptPrimType(PrimitiveBaseShape primShape)
        {
            if (primShape.SculptEntry)
                return (int) PrimType.Sculpt;
            if ((primShape.ProfileCurve & 0x07) == (byte) ProfileShape.Square)
            {
                if (primShape.PathCurve == (byte) Extrusion.Straight)
                    return (int) PrimType.Box;
                if (primShape.PathCurve == (byte) Extrusion.Curve1)
                    return (int) PrimType.Tube;
            }
            else if ((primShape.ProfileCurve & 0x07) == (byte) ProfileShape.Circle)
            {
                if (primShape.PathCurve == (byte) Extrusion.Straight)
                    return (int) PrimType.Cylinder;
                if (primShape.PathCurve == (byte) Extrusion.Curve1)
                    return (int) PrimType.Torus;
            }
            else if ((primShape.ProfileCurve & 0x07) == (byte) ProfileShape.HalfCircle)
            {
                if (primShape.PathCurve == (byte) Extrusion.Curve1 || primShape.PathCurve == (byte) Extrusion.Curve2)
                    return (int) PrimType.Sphere;
            }
            else if ((primShape.ProfileCurve & 0x07) == (byte) ProfileShape.EquilateralTriangle)
            {
                if (primShape.PathCurve == (byte) Extrusion.Straight)
                    return (int) PrimType.Prism;
                if (primShape.PathCurve == (byte) Extrusion.Curve1)
                    return (int) PrimType.Ring;
            }
            return (int) PrimType.NotPrimitive;
        }

        private static int getNumberOfSides(SceneObjectPart part)
        {
            int ret;
            bool hasCut;
            bool hasHollow;
            bool hasDimple;
            bool hasProfileCut;

            int primType = getScriptPrimType(part.Shape);
            hasCutHollowDimpleProfileCut(primType, part.Shape, out hasCut, out hasHollow, out hasDimple, out hasProfileCut);

            switch (primType)
            {
                default:
                case (int) PrimType.Box:
                    ret = 6;
                    if (hasCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case (int) PrimType.Cylinder:
                    ret = 3;
                    if (hasCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case (int) PrimType.Prism:
                    ret = 5;
                    if (hasCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case (int) PrimType.Sphere:
                    ret = 1;
                    if (hasCut) ret += 2;
                    if (hasDimple) ret += 2;
                    if (hasHollow)
                        ret += 1; // GOTCHA: LSL shows 2 additional sides here. 
                                  // This has been fixed, but may cause porting issues.
                    break;
                case (int) PrimType.Torus:
                    ret = 1;
                    if (hasCut) ret += 2;
                    if (hasProfileCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case (int) PrimType.Tube:
                    ret = 4;
                    if (hasCut) ret += 2;
                    if (hasProfileCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case (int) PrimType.Ring:
                    ret = 3;
                    if (hasCut) ret += 2;
                    if (hasProfileCut) ret += 2;
                    if (hasHollow) ret += 1;
                    break;
                case (int) PrimType.Sculpt:
                    ret = 1;
                    break;
            }
            return ret;
        }


        #endregion

    }
}