using System;

using RobocraftX.Common;
using Svelto.ECS;
using RobocraftX.Blocks;
using TechbloxModdingAPI.Engines;
using TechbloxModdingAPI.Utility;

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

        public void Ready()
        {
        }

        public EntitiesDB entitiesDB { get; set; }

        public void Dispose()
        {
        }

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

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

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

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

        public Block Block => block ?? (block = new Block(ID));
    }
}