//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="Platform"
// 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 StgSharp.Mathematics;
using System;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace StgSharp
{
    internal enum GraphicAPI : byte
    {

        GL,
        VK

    }

    public static partial class World
    {

        /// <summary>
        ///   Version of current World platform. Main version represent in hundred's digit, and sub
        ///   version represent in ten's digit.
        /// </summary>
        public const long version = 430;

        private static bool vsyncActivated;

        private static uint markCount = 0;
        internal static GraphicAPI API = default;

        public static int DefaultSIMDAlignment => NativeIntrinsic.IntrinsicLevel switch
        {
            IntrinsicLevel.SSE => 16,
            IntrinsicLevel.AVX2 => 32,
            IntrinsicLevel.AVX512 => 64,
            IntrinsicLevel.NEON => 16,
            IntrinsicLevel.Non => 8,
            _ => 8,
        };

        public static ModuleToInitializeCollection Initialize()
        {
            return new ModuleToInitializeCollection(new Initializer());
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void LogError(Exception ex)
        {
            DefaultLog.InternalWriteLog(ex.Message, LogType.Error);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void LogInfo(string log)
        {
            DefaultLog.InternalWriteLog(log, LogType.Info);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void LogWarning(string log)
        {
            DefaultLog.InternalWriteLog(log, LogType.Warning);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void LogWarning(Exception notVerySeriesException)
        {
            DefaultLog.InternalWriteLog(notVerySeriesException.Message, LogType.Warning);
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void Mark(bool needConsole)
        {
            markCount++;
            if (needConsole) {
                Console.WriteLine(markCount);
            }
        }

        public static void Terminate(int exitCode)
        {
            MainTimeProvider.StopProvidingTime();
            GraphicFramework.glfwTerminate();
            Environment.Exit(exitCode);
        }

        public static void Track(
                           object target,
                           string message,
                           bool isConsole,
                           [CallerFilePath] string filePath = "",
                           [CallerMemberName] string callerName = "",
                           [CallerLineNumber] int lineNumber = 0)
        {
            Type t = target.GetType();
            string log = $"Tracked object: {nameof(target)}\t\tType:{t.Name}\n";
            FieldInfo[] fieldInfo = t.GetFields(
                BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
            log += "|\tFieldName\t|\tFieldType\t|\tFieldValue\t|\n";
            foreach (FieldInfo field in fieldInfo) {
                log += $"|{field.Name}\t\t|{field.FieldType}\t\t|{field.GetValue(target)}\t\t|\n";
            }
            log += $"Tracking at:\n{filePath}\t{callerName}\tline {lineNumber}\n";
            log += $"Additional information:\n{message}\n";
            if (isConsole)
            {
                Console.WriteLine(log);
            } else
            {
                DefaultLog.InternalWriteLog(log, LogType.Info);
            }
        }

        /// <summary>
        ///   Write a log message to log file, and mark the _level of this message.
        /// </summary>
        /// <param _label="message">
        ///   A string contains information of how current evironment runs.
        /// </param>
        /// <param _label="logType">
        ///   The severity of current message.
        /// </param>
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void WriteLog(string message, LogType logType)
        {
            DefaultLog.InternalWriteLog(message, logType);
        }

        internal static TDele ConvertAPI<TDele>(IntPtr funcPtr)
        {
            if (funcPtr == IntPtr.Zero) {
                throw new InvalidCastException(
                    "Failed to convert api, the function pointer is zero.");
            }
            try
            {
                return Marshal.GetDelegateForFunctionPointer<TDele>(funcPtr);
            }
            catch (Exception)
            {
                throw;
            }
        }

        internal static Delegate ConvertAPI(IntPtr funcPtr, Type T)
        {
            if (funcPtr == IntPtr.Zero) {
                throw new InvalidCastException(
                    "Failed to convert api, the function pointer is zero.");
            }
            try
            {
                return Marshal.GetDelegateForFunctionPointer(funcPtr, T);
            }
            catch (Exception)
            {
                throw;
            }
        }

        internal static unsafe void InternalInitialize()
        {
            // Initialize time provider and start providing time
            MainTimeProvider.StartProvidingTime();
            GraphicFramework.LoadGlfw();
            if (GraphicFramework.glfwInit() == 0) {
                throw new Exception("Failed to init system graphic environment.");
            }
            DefaultLog.InternalAppendLog("\n\n\n");
            DefaultLog.InternalWriteLog(
                $"Program {Assembly.GetEntryAssembly()!.FullName} on {Environment.MachineName} Started.", LogType.Info);
            MainThreadID = System.Environment.CurrentManagedThreadId;


            Dialogue.LoadDialogue();
            if (Dialogue.NeedShowWhenStartup) {
                Dialogue.CreateDialogueProcessIfNotExist();
            }

            NativeIntrinsic.InitIntrinsicContext();
        }

        internal class Initializer : IStaticModule
        {

            public string ModuleName => "StgSharp";

            [MethodImpl(MethodImplOptions.AggressiveInlining)]
            public void InitializeModule()
            {
                World.InternalInitialize();
            }

        }

    }
}