using System;
using System.Diagnostics;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Threading;
using HarmonyLib;

namespace CLre.Fixes
{
    [Bugfix(name = "InitLogSooner",
        description = "Start the logger slightly sooner than Cardlife does",
        component = BugfixType.Initialiser, id = 0)]
    public static class InitLogSooner
    {
        public static int millisecondsTimeout = 5000;
        
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static void Init()
        {
            try
            {
                CustomLoggerThread_CreateGameObject_Patch.allowed = true;
                CustomLoggerThread.CreateGameObject();
                CustomLoggerThread_CreateGameObject_Patch.allowed = false;
                API.Utility.Logging.Log("Completed early log init");
                //System.IO.File.WriteAllText("InitLogSooner.log", $"Done at " + System.DateTime.Now.ToString());
            }
            catch (Exception e)
            {
                API.App.Client.LogInitComplete += (_, __) =>
                {
                    API.Utility.Logging.Log($"Failed to initialise log sooner, reason:\n" + e);
                };
                System.IO.File.WriteAllText("InitLogSooner.log", e.ToString());
            }
            
        }

        [Bugfix(name = "InitLogSooner", 
            target = typeof(CustomLoggerThread),
            component = BugfixType.HarmonyPatch, id = 0)]
        [HarmonyPatch(typeof(CustomLoggerThread), "CreateGameObject")]
        class CustomLoggerThread_CreateGameObject_Patch
        {
            internal static bool allowed = false;

            public static bool Prefix()
            {
                return allowed;
            }
        }
        
        [Bugfix(name = "InitLogSooner",
            component = BugfixType.HarmonyPatch, id = 0)]
        [HarmonyPatch(typeof(CustomLoggerThread), "StartQueue")]
        class CustomLoggerThread_StartQueue_Patch
        {
            internal static volatile bool IsLogStarted = false;
            
            private delegate void Flusher();

            public static bool Prefix()
            {
                // setup thru reflection
                FieldInfo quitThreadField = AccessTools.Field(typeof(CustomLoggerThread), "_quitThread");
                
                MethodInfo flushLoggerMethod = AccessTools.Method(typeof(CustomLoggerThread), "FlushLogger");
                Flusher flushLogger = API.Utility.Reflection.BuildDelegate<Flusher>(flushLoggerMethod, null);
                //Flusher flushLogger = (Flusher) Delegate.CreateDelegate(typeof(Action), null, flushLoggerMethod);

                MethodInfo forceFlushMethod = AccessTools.Method("CustomLogger:ForceFlush");
                Flusher forceFlush = API.Utility.Reflection.BuildDelegate<Flusher>(forceFlushMethod, null);
                //Flusher forceFlush = (Flusher) Delegate.CreateDelegate(typeof(Action), null, forceFlushMethod);
                
                Thread.MemoryBarrier();
                IsLogStarted = true;
                while (!(bool) quitThreadField.GetValue(null))
                {
                    flushLogger();
                    forceFlush();
                    Thread.Sleep(millisecondsTimeout);
                }

                IsLogStarted = false;
                return false;
            }
        }
    }
}