//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="GlobalSetting"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
//     
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//     
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace StgSharp
{
    public static unsafe partial class World
    {

        internal const int ssdSegmentLength = 16;

        private static byte[] _currentHash = [];

        private static bool _inited;
        private static int _mainThreadID = -1;

        public static byte[] CurrentAssemblyHash
        {
            get
            {
                if (_currentHash == null)
                {
                    string route = Assembly.GetExecutingAssembly().Location;
                    string time = DateTime.UtcNow.ToString();
                    using (SHA256 sh = SHA256.Create())
                    {
                        byte[] bytes = Encoding.UTF8.GetBytes(route);
                        _currentHash = sh.ComputeHash(bytes);
                    }
                }
                return _currentHash;
            }
        }

        public static int MainThreadID
        {
            get => (_mainThreadID == -1) ?
                   throw new InvalidOperationException(
                "StgSharp environment is not inited. Main thread id is not available") :
                   _mainThreadID;
            internal set => _mainThreadID = value;
        }

        /// <summary>
        ///   CustomizeInit an instance of OpenGL program, This method should be called before any
        ///   other World api.
        /// </summary>
        public static void InitGL(int majorVersion, int minorVersion)
        {
            if (API == default) {
                API = GraphicAPI.GL;
            }
            if (API != GraphicAPI.GL) {
                return;
            }
            InternalIO.InternalInitGL(majorVersion, minorVersion);
        }

        public static class GlobalSetting
        {

            private static bool vSyncActivated;

            public static bool VSyncActivated
            {
                get => vsyncActivated;
                set
                {
                    InternalIO.glfwSwapInterval(value ? 1 : 0);
                    vsyncActivated = value;
                }
            }

        }

    }//-------------------------------------- End of Class ---------------------------------------//
}