using RobocraftX.Common;
using RobocraftX.DOTS;
using Svelto.ECS;
using Svelto.ECS.EntityStructs;
using Unity.Mathematics;
using Unity.Transforms;

using TechbloxModdingAPI.Engines;
using TechbloxModdingAPI.Utility;

namespace TechbloxModdingAPI.Blocks.Engines
{
    /// <summary>
    /// Engine which executes block movement actions
    /// </summary>
    public class MovementEngine : IApiEngine
    {
        public string Name { get; } = "TechbloxModdingAPIMovementGameEngine";

        public EntitiesDB entitiesDB { set; private get; }

		public bool isRemovable => false;

		public bool IsInGame = false;

        public void Dispose()
        {
            IsInGame = false;
        }

        public void Ready()
        {
            IsInGame = true;
        }

        // implementations for Movement static class

        internal float3 MoveBlock(Block block, float3 vector)
        {
            ref PositionEntityStruct posStruct = ref this.entitiesDB.QueryEntityOrDefault<PositionEntityStruct>(block);
            ref GridRotationStruct gridStruct = ref this.entitiesDB.QueryEntityOrDefault<GridRotationStruct>(block);
            ref LocalTransformEntityStruct transStruct = ref this.entitiesDB.QueryEntityOrDefault<LocalTransformEntityStruct>(block);
            var phyStruct = this.entitiesDB.QueryEntityOptional<DOTSPhysicsEntityStruct>(block);
            // main (persistent) position
            posStruct.position = vector;
            // placement grid  position
            gridStruct.position = vector;
            // rendered position
            transStruct.position = vector;
            // collision position
            if (phyStruct)
            { //It exists
                FullGameFields._physicsWorld.EntityManager.SetComponentData(phyStruct.Get().dotsEntity, new Translation
                {
                    Value = posStruct.position
                });
            }

            entitiesDB.QueryEntityOrDefault<GridConnectionsEntityStruct>(block).areConnectionsAssigned = false;
            return posStruct.position;
        }

        internal float3 GetPosition(Block block)
        {
            return entitiesDB.QueryEntityOrDefault<PositionEntityStruct>(block).position;
        }
    }
}