#include <windows.h>
#include "modelessDialogue.h"

const char className[] = "modelessDialogue";
const char APP_TITLE[] = "Modeless Dialogue Test";

const unsigned short int APP_WIDTH = 240;
const unsigned short int APP_HEIGHT = 120;

const unsigned short int ADD_NUM = 10;
unsigned long int numAdd = 0;

HWND handleDigTool = NULL;

BOOL CALLBACK digToolEventListener (HWND hwnd, UINT event, WPARAM object, LPARAM lParam);
LRESULT CALLBACK mainEventListener (HWND hwnd, UINT event, WPARAM object, LPARAM lParam);

BOOL CALLBACK digToolEventListener (HWND hwnd, UINT event, WPARAM object, LPARAM lParam)
{
	
	if (event == WM_COMMAND) //Action performed (e.g. button click)
	{
		
		int objectID = LOWORD(object);
		
		if (objectID == cmdToolAdd)
		{
			
			numAdd += ADD_NUM;
			MessageBox(hwnd, "Added 10 to the answer", className, MB_OK | MB_ICONINFORMATION);
			
		}
		else if (objectID == cmdToolShow)
		{
			
			char buffer[33]; //Create a buffer array of char
			itoa(numAdd, buffer, 10); //Convert the integer into chars and put them into the char array
			MessageBox(hwnd, buffer, className, MB_OK | MB_ICONEXCLAMATION);
			
		}
		
	}	
	else
	{
		return false;
	}
	
	return true;
	
}

LRESULT CALLBACK mainEventListener (HWND hwnd, UINT event, WPARAM object, LPARAM lParam)
{
	
	if (event == WM_CREATE)
	{
		
		handleDigTool = CreateDialog(GetModuleHandle(NULL), MAKEINTRESOURCE(digTool), hwnd, digToolEventListener);
		
		if (handleDigTool != NULL)
		{
			ShowWindow(handleDigTool, SW_SHOW);
		}
		else
		{
			MessageBox(hwnd, "Could not create modeless dialogue box", className, MB_OK | MB_ICONINFORMATION);
		}
		
	}
	else if (event == WM_COMMAND)
	{
		
		int objectID = LOWORD(object);
		
		if (objectID == mItemToolShow)
		{
			ShowWindow(handleDigTool, SW_SHOW);
		}
		else if (objectID == mItemToolHide)
		{
			ShowWindow(handleDigTool, SW_HIDE);
		}
		else if (objectID == mItemFileExit)
		{
			PostMessage(hwnd, WM_CLOSE, 0, 0);
		}
		
	}
	else if (event == WM_CLOSE)
	{
		DestroyWindow(hwnd);
	}
	else if (event == WM_DESTROY)
	{
		
		DestroyWindow(handleDigTool);
		PostQuitMessage(0);
		
	}
	else
	{
		return DefWindowProc(hwnd, event, object, lParam);
	}
	
	return 0;
	
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR args, int nCmdShow)
{
	
    WNDCLASSEX wc; //The class settings
    HWND hwnd; //Main window handler
    MSG Msg; //Here messages to the application are saved

    //Step 1: Registering the Window Class
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.lpfnWndProc = mainEventListener;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(imgMainIcon));
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
    wc.lpszMenuName = MAKEINTRESOURCE(menuSystem);
    wc.lpszClassName = className;
    wc.hIconSm = (HICON)LoadImage(GetModuleHandle(NULL), MAKEINTRESOURCE(imgMainIcon), IMAGE_ICON, 16, 16, 0);

    if(!RegisterClassEx(&wc)) //If the class was not registered successfully
    {

        MessageBox(NULL, "Window Registration Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);
        return 0;
        
    }

    //Create the window
    hwnd = CreateWindowEx(WS_EX_CLIENTEDGE, className, APP_TITLE, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, APP_WIDTH, APP_HEIGHT, NULL, NULL, hInstance, NULL);

    if(hwnd == NULL) //If a problem occured with creating the window
    {
	    
        MessageBox(NULL, "Window Creation Failed!", "Error!", MB_ICONEXCLAMATION | MB_OK);        
        return 0;
        
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    //This keeps looping and processing messages when they become available
    //The while loop ends when a destroy message is sent
    while(GetMessage(&Msg, NULL, 0, 0) > 0)
    {
	    
	    if (!IsDialogMessage(handleDigTool, &Msg))
	    {
		    	    
	        TranslateMessage(&Msg);
	        DispatchMessage(&Msg);
	        
        }
        
    }
    
    return Msg.wParam;
    
}