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using System;
using System.Collections.Generic;
using libsecondlife;
using OpenSim.Framework;
using OpenSim.Region.Environment.Interfaces;
using OpenSim.Region.Environment.Scenes;

namespace OpenSim.Region.Environment.Modules.World.Land
{
    public class LandChannel : ILandChannel
    {
        #region Constants

        //Land types set with flags in ParcelOverlay.
        //Only one of these can be used.
        public const float BAN_LINE_SAFETY_HIEGHT = 100;
        public const byte LAND_FLAG_PROPERTY_BORDER_SOUTH = 128; //Equals 10000000
        public const byte LAND_FLAG_PROPERTY_BORDER_WEST = 64; //Equals 01000000

        //RequestResults (I think these are right, they seem to work):
        public const int LAND_RESULT_MULTIPLE = 1; // The request they made contained more than a single peice of land
        public const int LAND_RESULT_SINGLE = 0; // The request they made contained only a single piece of land

        //ParcelSelectObjects
        public const int LAND_SELECT_OBJECTS_GROUP = 4;
        public const int LAND_SELECT_OBJECTS_OTHER = 8;
        public const int LAND_SELECT_OBJECTS_OWNER = 2;
        public const byte LAND_TYPE_IS_BEING_AUCTIONED = 5; //Equals 00000101
        public const byte LAND_TYPE_IS_FOR_SALE = 4; //Equals 00000100
        public const byte LAND_TYPE_OWNED_BY_GROUP = 2; //Equals 00000010
        public const byte LAND_TYPE_OWNED_BY_OTHER = 1; //Equals 00000001
        public const byte LAND_TYPE_OWNED_BY_REQUESTER = 3; //Equals 00000011
        public const byte LAND_TYPE_PUBLIC = 0; //Equals 00000000

        //These are other constants. Yay!
        public const int START_LAND_LOCAL_ID = 1;

        #endregion

        private readonly Scene m_scene;
        private readonly LandManagementModule m_landManagementModule;

        public LandChannel(Scene scene, LandManagementModule landManagementMod)
        {
            m_scene = scene;
            m_landManagementModule = landManagementMod;
        }

        #region ILandChannel Members


        /// <summary>
        /// Get the land object at the specified point
        /// </summary>
        /// <param name="x_float">Value between 0 - 256 on the x axis of the point</param>
        /// <param name="y_float">Value between 0 - 256 on the y axis of the point</param>
        /// <returns>Land object at the point supplied</returns>
        public ILandObject GetLandObject(float x_float, float y_float)
        {
            if (m_landManagementModule != null)
            {
                return m_landManagementModule.GetLandObject(x_float, y_float);
            }
            ILandObject obj = new LandObject(LLUUID.Zero, false, m_scene);
            obj.landData.landName = "NO LAND";
            return obj;
        }

        public ILandObject GetLandObject(int x, int y)
        {

            if (m_landManagementModule != null)
            {
                return m_landManagementModule.GetLandObject(x, y);
            }
            ILandObject obj = new LandObject(LLUUID.Zero, false, m_scene);
            obj.landData.landName = "NO LAND";
            return obj;
        }

        public List<ILandObject> ParcelsNearPoint(LLVector3 position)
        {
            if (m_landManagementModule != null)
            {
                return m_landManagementModule.ParcelsNearPoint(position);
            }

            return new List<ILandObject>();
        }

        public bool IsLandPrimCountTainted()
        {
            if (m_landManagementModule != null)
            {
                return m_landManagementModule.IsLandPrimCountTainted();
            }

            return false;
        }

        public bool IsForcefulBansAllowed()
        {
            if (m_landManagementModule != null)
            {
                return m_landManagementModule.AllowedForcefulBans;
            }

            return false;
        }

        public void UpdateLandObject(int localID, LandData data)
        {
            if (m_landManagementModule != null)
            {
                m_landManagementModule.UpdateLandObject(localID, data);
            }
        }
        #endregion

    }
}