// XaymarHelper.cpp : Defines the entry point for the DLL application.
//

#include <windows.h>

#define DLL_EXPORT extern "C" _declspec(dllexport)
#define DLL_IMPORT extern "C" _declspec(dllimport)
#define DLL_CALL _stdcall

WNDPROC gBlitzProc;
HWND gBlitzWindow;
int iClose;
int MainMonitorX, MainMonitorY;
int MainMonitorW, MainMonitorH;

DLL_EXPORT int DLL_CALL InstallCloseHandler(char *BlitzWindowName);
DLL_EXPORT int DLL_CALL GetWindowClose();
DLL_EXPORT int DLL_CALL UnInstallCloseHandler();
DLL_EXPORT void DLL_CALL GetMainMonitorSize(int Bank);
DLL_EXPORT void DLL_CALL CursorBounds(int X, int Y, int W, int H);

BOOL APIENTRY DllMain( HANDLE hModule, DWORD  fdwReason, LPVOID lpReserved ) {
    return TRUE;
}

//Window Event Handler: Close
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    switch(uMsg) {
    case WM_CLOSE:
        iClose = iClose+1;
        return true;
    default:
        return CallWindowProc(gBlitzProc, hwnd, uMsg, wParam, lParam);
    }
    return 0;
}
DLL_EXPORT int DLL_CALL GetWindowClose() {
    int RetVal;RetVal = iClose;
    iClose = iClose-1;
    if (iClose < 0) iClose = 0;
    return RetVal;
}
DLL_EXPORT int DLL_CALL InstallCloseHandler(char *BlitzWindowName) {
    gBlitzWindow = FindWindow("Blitz Runtime Class", BlitzWindowName);
    if(!gBlitzWindow) return false;
    gBlitzProc = (WNDPROC)SetWindowLong(gBlitzWindow, GWL_WNDPROC, (LONG)WindowProc);
    return true;
}
DLL_EXPORT int DLL_CALL UnInstallCloseHandler() {
    SetWindowLong(gBlitzWindow, GWL_WNDPROC, (LONG)gBlitzProc);
    return true;
}

//Get Main Monitor Size
BOOL CALLBACK MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM dwData) {
    MONITORINFO *moninfo = new MONITORINFO;
    moninfo->cbSize = sizeof( MONITORINFO );
    GetMonitorInfo(hMonitor, moninfo);
    if (moninfo->dwFlags == 1) {
        MainMonitorX = moninfo->rcMonitor.left;
        MainMonitorY = moninfo->rcMonitor.top;
        MainMonitorW = moninfo->rcMonitor.right;
        MainMonitorH = moninfo->rcMonitor.bottom;
    }
}
DLL_EXPORT void DLL_CALL GetMainMonitorSize(int Bank) {
    EnumDisplayMonitors(NULL,NULL,MonitorEnumProc,0);
    *(int*)(Bank+0) = MainMonitorX;
    *(int*)(Bank+4) = MainMonitorY;
    *(int*)(Bank+8) = MainMonitorW;
    *(int*)(Bank+12) = MainMonitorH;
}

//Mouse Stuff
DLL_EXPORT void DLL_CALL CursorBounds(int X, int Y, int W, int H) {
   RECT Area;
   Area.left = X;
   Area.top = Y;
   Area.right = X+W;
   Area.bottom = Y+H;
   ClipCursor(&Area);
}