using FFXIVClassic_Map_Server.dataobjects;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FFXIVClassic_Map_Server
{
    class Zone
    {
        public uint mapId;
        public ushort weatherNormal, weatherCommon, weatherRare;
        public ushort bgmDay, bgmNight, bgmBattle;
        public int boundingGridSize = 200;
        public int minX = -1000, minY = -1000, maxX = 1000, maxY = 1000;
        private int numXBlocks, numYBlocks;
        private int halfWidth, halfHeight;
        private List<Actor>[,] actorBlock;

        public Zone()
        {
            numXBlocks = (maxX - minX) / boundingGridSize;
            numYBlocks = (maxY - minY) / boundingGridSize;
            actorBlock = new List<Actor>[numXBlocks, numYBlocks];
            halfWidth = numXBlocks / 2;
            halfHeight = numYBlocks / 2;
        }

        #region Actor Management

        public void addActorToZone(Actor actor)
        {
            int gridX = (int)actor.positionX / boundingGridSize;
            int gridY = (int)actor.positionY / boundingGridSize;

            gridX += halfWidth;
            gridY += halfHeight;

            //Boundries
            if (gridX < 0)
                gridX = 0;
            if (gridX >= numXBlocks)
                gridX = numXBlocks - 1;
            if (gridY < 0)
                gridY = 0;
            if (gridY >= numYBlocks)
                gridY = numYBlocks - 1;

            lock (actorBlock)
                actorBlock[gridX, gridY].Add(actor);
        }

        public void removeActorToZone(Actor actor)
        {
            int gridX = (int)actor.positionX / boundingGridSize;
            int gridY = (int)actor.positionY / boundingGridSize;

            gridX += halfWidth;
            gridY += halfHeight;

            //Boundries
            if (gridX < 0)
                gridX = 0;
            if (gridX >= numXBlocks)
                gridX = numXBlocks - 1;
            if (gridY < 0)
                gridY = 0;
            if (gridY >= numYBlocks)
                gridY = numYBlocks - 1;

            lock (actorBlock)
                actorBlock[gridX, gridY].Remove(actor);
        }

        public void updateActorPosition(Actor actor)
        {
            int gridX = (int)actor.positionX / boundingGridSize;
            int gridY = (int)actor.positionY / boundingGridSize;

            gridX += halfWidth;
            gridY += halfHeight;

            //Boundries
            if (gridX < 0)
                gridX = 0;
            if (gridX >= numXBlocks)
                gridX = numXBlocks - 1;
            if (gridY < 0)
                gridY = 0;
            if (gridY >= numYBlocks)
                gridY = numYBlocks - 1;

            int gridOldX = (int)actor.oldPositionX / boundingGridSize;
            int gridOldY = (int)actor.oldPositionY / boundingGridSize;

            gridOldX += halfWidth;
            gridOldY += halfHeight;

            //Boundries
            if (gridOldX < 0)
                gridOldX = 0;
            if (gridOldX >= numXBlocks)
                gridOldX = numXBlocks - 1;
            if (gridOldY < 0)
                gridOldY = 0;
            if (gridOldY >= numYBlocks)
                gridOldY = numYBlocks - 1;

            //Still in same block
            if (gridX == gridOldX && gridY == gridOldY)
                return;

            lock (actorBlock)
                actorBlock[gridOldX, gridOldY].Remove(actor);
            lock (actorBlock)
                actorBlock[gridX, gridY].Add(actor);
        }

        public List<Actor> getActorsAroundPoint(float x, float y, int checkDistance)
        {
            int gridX = (int)x/boundingGridSize;
            int gridY = (int)y/boundingGridSize;

            gridX += halfWidth;
            gridY += halfHeight;

            //Boundries
            if (gridX < 0)
                gridX = 0;
            if (gridX >= numXBlocks)
                gridX = numXBlocks - 1;
            if (gridY < 0)
                gridY = 0;
            if (gridY >= numYBlocks)
                gridY = numYBlocks - 1;

            List<Actor> result = new List<Actor>();

            for (int gx = gridX - checkDistance; gx <= gridX + checkDistance; gx++)
            {
                for (int gy = gridY - checkDistance; gy <= gridY + checkDistance; gy++)
                {
                    result.AddRange(actorBlock[gx, gy]);
                }
            }

            return result;
        }

        public List<Actor> getActorsAroundActor(Actor actor, int checkDistance)
        {
            int gridX = (int)actor.positionX / boundingGridSize;
            int gridY = (int)actor.positionY / boundingGridSize;

            gridX += halfWidth;
            gridY += halfHeight;

            //Boundries
            if (gridX < 0)
                gridX = 0;
            if (gridX >= numXBlocks)
                gridX = numXBlocks - 1;
            if (gridY < 0)
                gridY = 0;
            if (gridY >= numYBlocks)
                gridY = numYBlocks - 1;

            List<Actor> result = new List<Actor>();

            for (int gx = gridX - checkDistance; gx <= gridX + checkDistance; gx++)
            {
                for (int gy = gridY - checkDistance; gy <= gridY + checkDistance; gy++)
                {
                    result.AddRange(actorBlock[gx, gy]);
                }
            }

            return result;
        }

        #endregion
    }
}