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

using RobocraftX;
using RobocraftX.Blocks;
using RobocraftX.Blocks.Ghost;
using RobocraftX.Common;
using RobocraftX.Multiplayer;
using RobocraftX.SimulationModeState;
using RobocraftX.UECS;
using Unity.Entities;
using Svelto.Context;
using Svelto.ECS;
using Svelto.ECS.EntityStructs;
using Unity.Transforms;
using Unity.Mathematics;
using UnityEngine;

using GamecraftModdingAPI.Utility;
using GamecraftModdingAPI.Engines;

namespace GamecraftModdingAPI.Blocks
{
    /// <summary>
    /// Engine which executes block movement actions
    /// </summary>
    public class RotationEngine : IApiEngine
    {
        public string Name { get; } = "GamecraftModdingAPIRotationGameEngine";

        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 Rotation static class

        public float3 RotateBlock(uint blockID, Vector3 vector)
        {
            ref RotationEntityStruct rotStruct = ref this.entitiesDB.QueryEntity<RotationEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            ref GridRotationStruct gridStruct = ref this.entitiesDB.QueryEntity<GridRotationStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            ref LocalTransformEntityStruct transStruct = ref this.entitiesDB.QueryEntity<LocalTransformEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            ref UECSPhysicsEntityStruct phyStruct = ref this.entitiesDB.QueryEntity<UECSPhysicsEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            // main (persistent) position
            Quaternion newRotation = (Quaternion)rotStruct.rotation;
            newRotation.eulerAngles += vector;
            rotStruct.rotation = (quaternion)newRotation;
            // placement grid rotation
            Quaternion newGridRotation = (Quaternion)gridStruct.rotation;
            newGridRotation.eulerAngles += vector;
            gridStruct.rotation = (quaternion)newGridRotation;
            // rendered position
            Quaternion newTransRotation = (Quaternion)rotStruct.rotation;
            newTransRotation.eulerAngles += vector;
            transStruct.rotation = newTransRotation;
            // collision position
            FullGameFields._physicsWorld.EntityManager.SetComponentData(phyStruct.uecsEntity, new Unity.Transforms.Rotation
            {
                Value = rotStruct.rotation
            });
            entitiesDB.QueryEntity<GridConnectionsEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP).isProcessed = false;
            return ((Quaternion)rotStruct.rotation).eulerAngles;

        }

        public float3 GetRotation(uint blockID)
        {
            ref RotationEntityStruct rotStruct = ref entitiesDB.QueryEntity<RotationEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            return ((Quaternion) rotStruct.rotation).eulerAngles;
        }
    }
}