/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: Panic.cpp
    Date: 2021-6-12
    Author: Reece
***/
#include <Source/RuntimeInternal.hpp>
#include "Debug.hpp"
#include "Panic.hpp"
//#include <intrin.h>
#include <Source/Grug/AuGrug.hpp>
#include <Source/Console/ConsoleTTY/ConsoleTTY.hpp>
#include <Source/Console/Console.hpp>

namespace Aurora::Debug
{
    void PlatformHandleFatal();
    static bool gHandlingFatal = false;
    
    AUKN_SYM void DebugBreak()
    {
    #if defined(AU_CFG_ID_INTERNAL) || defined(AU_CFG_ID_DEBUG)
        #if defined(AURORA_PLATFORM_WIN32)
            #if defined(AU_CFG_ID_INTERNAL)
            if (IsDebuggerPresent())
            #endif
            {
                ::DebugBreak();
            }
        #elif defined(AU_CFG_ID_DEBUG) // bc nix
            #if defined(AURORA_COMPILER_MSVC)
                __debugbreak();
            #elif (defined(__has_builtin) && __has_builtin(__builtin_debugtrap))
                __builtin_debugtrap();
            #elif defined(AURORA_COMPILER_GCC) ||  defined(AURORA_COMPILER_CLANG)
                // GCC is a terrible compiler, msvc is annoying at best, and LLVM + cpp frontend seems great, whats new?
                // I refuse to chuck inline assembly here, not here, not in this project, not for freetards.
            #endif
        #endif
    #endif
    }

    bool InPanic()
    {
        return gHandlingFatal;
    }

    AUKN_SYM void Panic2(AuUInt uLineHintInNonshipBinary)
    {
        // TODO: telemetry insert crashing from line uLineHintInNonshipBinary
        Panic();
    }

    AUKN_SYM void Panic()
    {
        // 
        if (gHandlingFatal)
        {
            goto failFast;
        }

        DebugBreak();
        // Edge case: internal builds should always check for a debugger before crashing
    #if defined(AU_CFG_ID_INTERNAL) && defined(__has_builtin) && __has_builtin(__builtin_debugtrap)
        __builtin_debugtrap();
    #endif
        //

        if (AuExchange(gHandlingFatal, true))
        {
            goto failFast;
        }

        try
        {
            Console::ConsoleTTY::PumpForce();
        }
        catch (...)
        {

        }

        try
        {
            Grug::GrugFlushFlushs();
            Grug::GrugFlushWrites();
        }
        catch (...)
        {

        }

        try
        {
            Console::Pump();
        }
        catch (...)
        {

        }

    failFast:

        static bool runPlatformFastFailOnce {};
        if (!AuExchange(runPlatformFastFailOnce, true))
        {
            try
            {
                Debug::PlatformHandleFatal(true);
            }
            catch (...)
            {

            }
        }
   
    #if defined(AURORA_IS_MODERNNT_DERIVED)
        Win32Terminate();
    #else
        #if defined(AURORA_COMPILER_GCC) ||  defined(AURORA_COMPILER_CLANG)
            __builtin_trap();
        #else
            std::terminate();
        #endif
    #endif
    }
}