using StgSharp.Control;
using StgSharp.Graphics;
using System;

namespace StgSharp
{
    public static unsafe partial class Graphic
    {
        public static unsafe void LoadGL()
        {
            GraphicIOPack GLpack = internalIO.InternalInitGraphicApi();
        }

        internal static byte[] loadShaderCodeStr(string str)
        {
            byte[] cahrStr; 
            try
            {
                cahrStr = System.Text.Encoding.ASCII.GetBytes(str);
                return cahrStr;
            }
            catch (Exception)
            {

                throw;
            }
        }

        /// <summary>
        /// Init a form, attach its data to GLFW program, 
        /// and return the pointer of the GLFW package of the form.
        /// </summary>
        /// <param name="form">The C# instance of the form</param>
        /// <returns>Pointer of the GLFW package of this form</returns>
        /// <exception cref="Exception">The issue that form is not successfully initilized
        /// or GLAD program fail to init</exception>
        public static unsafe IntPtr InitWindow(Form form)
        {
            IntPtr a = internalIO.InternalInitWindow(form.info);
            if ((long)a == -1)
            {
                throw new Exception("Failed to init form.");
            }
            else if ((long)a == -2)
            {
                throw new Exception("Failed to load GLAD program.");
            }
            else
            {
                return a;
            }
        }

        public static unsafe void LoadForm(Form form)
        {
            TimeLine.allForm.Add(form);
        }

        public static unsafe bool ShouldFormClose(Form form)
        {
            int a = internalIO.InternalShouldFormClose(form.windowPtr);
            return a != 0;
        }

    }
}