#include "HGCrash.h"
#include "HGInc.h"
#if defined(HG_CMP_MSC)
#include <Dbghelp.h>
#endif

static HGCrashFunc g_crashFunc = NULL;
static HGPointer g_crashParam = NULL;
#if defined(HG_CMP_MSC)
static _EXCEPTION_POINTERS* g_exceptionInfo = NULL;
#endif

#if defined(HG_CMP_MSC)
static LONG WINAPI UnhandledExceptionFilterEx(struct _EXCEPTION_POINTERS* exceptionInfo)
{
    g_exceptionInfo = exceptionInfo;
    if (NULL != g_crashFunc)
        g_crashFunc(exceptionInfo->ExceptionRecord->ExceptionAddress, g_crashParam);
    g_exceptionInfo = NULL;

    return EXCEPTION_EXECUTE_HANDLER;
}
#endif

HGResult HGAPI HGBase_RegisterCrashFunc(HGCrashFunc func, HGPointer param)
{
	if (NULL == func)
	{
		return HGBASE_ERR_INVALIDARG;
	}

#if defined(HG_CMP_MSC)
    g_crashFunc = func;
    g_crashParam = param;
    SetUnhandledExceptionFilter(UnhandledExceptionFilterEx);
    return HGBASE_ERR_OK;
#else
    return HGBASE_ERR_NOTIMPL;
#endif
}

HGResult HGAPI HGBase_MakeCrashFile(const HGChar* filePath)
{
#if defined(HG_CMP_MSC)
    if (NULL == g_exceptionInfo)
    {
        return HGBASE_ERR_FAIL;
    }

    HANDLE hFile = CreateFileA(filePath, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if (INVALID_HANDLE_VALUE == hFile)
    {
        return HGBASE_ERR_ACCESSDENIED;
    }

    MINIDUMP_EXCEPTION_INFORMATION mdei;
    mdei.ThreadId = GetCurrentThreadId();
    mdei.ExceptionPointers = g_exceptionInfo;
    mdei.ClientPointers = TRUE;
    MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(), hFile, MiniDumpNormal, &mdei, NULL, NULL);
    CloseHandle(hFile);
    return HGBASE_ERR_OK;
#else
    return HGBASE_ERR_NOTIMPL;
#endif
}