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

namespace StgSharp.Graphics
{
    /// <summary>
    /// Interface of all kinds OpenGL buffer onjects
    /// </summary>
    public abstract class BufferObjectBase : IDisposable
    {
        protected glHandleSet _bufferHandle;
        protected IglFunc GL;

        /// <summary>
        /// Get the only handle to one of the Object instance
        /// </summary>
        /// <param name="index"></param>
        /// <returns></returns>
        public glHandle this[int index]
        {
            get { return _bufferHandle[index]; }
        }

        /// <summary>
        /// Bind a buffer instance to OpenGL
        /// </summary>
        /// <param name="index">Index of handle of the object in this instance to be bind</param>
        public abstract void Bind(int index);

        /// <inheritdoc/>
        public override string ToString()
        {
            return $"This is a {GetType().FullName}, containing {_bufferHandle.length} buffer handles: {_bufferHandle.ToString()}.";
        }

        protected abstract void Dispose(bool disposing);

        ~BufferObjectBase()
        {
            Dispose(disposing: false);
        }

        public void Dispose()
        {
            Dispose(disposing: true);
            GC.SuppressFinalize(this);
        }
    }
}