using System.Collections.Generic;

using RobocraftX.Blocks;
using RobocraftX.Common;
using Svelto.DataStructures;
using Svelto.ECS;

using GamecraftModdingAPI.Engines;

namespace GamecraftModdingAPI.Blocks
{
    public class BlockEngine : IApiEngine
    {
        public string Name { get; } = "GamecraftModdingAPIBlockGameEngine";

        public EntitiesDB entitiesDB { set; private get; }

        public bool isRemovable => false;

        public void Dispose()
        {
        }

        public void Ready()
        {
        }

        public Block[] GetConnectedBlocks(uint blockID)
        {
            Stack<uint> cubeStack = new Stack<uint>();
            FasterList<uint> cubesToProcess = new FasterList<uint>();
            ConnectedCubesUtility.TreeTraversal.GetConnectedCubes(entitiesDB, blockID, cubeStack, cubesToProcess, (in GridConnectionsEntityStruct g) => { return false; });
            var ret = new Block[cubesToProcess.count];
            for (int i = 0; i < cubesToProcess.count; i++)
                ret[i] = new Block(cubesToProcess[i]);
            return ret;
        }

        public ref T GetBlockInfo<T>(EGID blockID) where T : struct, IEntityComponent
        {
            return ref entitiesDB.QueryEntity<T>(blockID);
        }
    }
}