using System;

using RobocraftX.Blocks;
using Svelto.ECS;

using TechbloxModdingAPI.Engines;
using TechbloxModdingAPI.Utility;

namespace TechbloxModdingAPI.Blocks.Engines
{
    public class BlockEventsEngine : IReactionaryEngine<BlockTagEntityStruct>
    {
        public WrappedHandler<BlockPlacedRemovedEventArgs> Placed;
        public WrappedHandler<BlockPlacedRemovedEventArgs> Removed;

        public void Ready()
        {
        }

        public EntitiesDB entitiesDB { get; set; }

        public void Dispose()
        {
        }

        public string Name { get; } = "TechbloxModdingAPIBlockEventsEngine";
        public bool isRemovable { get; } = false;

        private bool shouldAddRemove;
        public void Add(ref BlockTagEntityStruct entityComponent, EGID egid)
        {
            if (!(shouldAddRemove = !shouldAddRemove))
                return;
            Placed.Invoke(this, new BlockPlacedRemovedEventArgs {ID = egid});
        }

        public void Remove(ref BlockTagEntityStruct entityComponent, EGID egid)
        {
            if (!(shouldAddRemove = !shouldAddRemove))
                return;
            Removed.Invoke(this, new BlockPlacedRemovedEventArgs {ID = egid});
        }
    }

    public struct BlockPlacedRemovedEventArgs
    {
        public EGID ID;
        private Block block;

        public Block Block => block ??= Block.New(ID);
    }
}