#include "compileconfig.h"
#include "winmain.h"

/*!
	\file mainwin.cpp
    \brief There's defined the entry point to the application
*/



/*!
	here our application starts
*/
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int)
{
	GetPrgRes()->SetInstance(hInstance);
	GetPrgRes()->GetLanguages()->SetCurrentLanguage(Languages::en);
	GetPrgRes()->SetNameOfConfigurationFile();
	GetPrgRes()->ReadFromFile();
	
	INITCOMMONCONTROLSEX common_ctrl;
	common_ctrl.dwSize = sizeof(common_ctrl);
	common_ctrl.dwICC  = ICC_WIN95_CLASSES;

	if( !InitCommonControlsEx(&common_ctrl) )
		return ShowError( Languages::cant_init_common_controls );

	if( !GetPrgRes()->GetThreadController()->Init() )
		return ShowError( Languages::cant_init_calculations );

	unsigned int  thread_id;
	uintptr_t thread_handle;
	if( (thread_handle = _beginthreadex(0,0,CalculationsProcedure, 0, 0, &thread_id)) == 0 )
		return ShowError( Languages::cant_create_thread );

	CreateDialog( hInstance, MAKEINTRESOURCE(IDD_MAIN_DIALOG), 0, MainWindowProc);

	if( !GetPrgRes()->GetMainWindow() )
		return ShowError( Languages::cant_create_main_window );
 

	// there's the main loop of messages here
	MainMessagesLoop();

	GetPrgRes()->SaveToFile();
	CloseHandle( (HANDLE)thread_handle );

return 0;
}


/*!
	it displays a message box with an error
	(it's only used during initiation)
*/
int ShowError( Languages::GuiMsg error_code )
{
	MessageBox(0, GetPrgRes()->GetLanguages()->GuiMessage( error_code ),
				  GetPrgRes()->GetLanguages()->GuiMessage( Languages::message_box_error_caption ),
				  MB_ICONERROR);

return static_cast<int>( error_code );
}


/*!
	the main loop of messages
*/
void MainMessagesLoop()
{
MSG msg;

	while( GetMessage(&msg,0,0,0) )
	{
		bool sended = false;

		// firt we try to send our message to dialogs
		// (the dialogs on the tab control)
		for(unsigned int i=0 ; i<GetPrgRes()->HowManyTabWindows() && !sended ; ++i)
		{
			if( IsDialogMessage(GetPrgRes()->GetTabWindow(i), &msg) )
				sended = true;
		}

		// if it's not a message to any of our dialogs we send it
		// to the main window (it's a dialog as well)
		if( !sended )
		{
			if( !IsDialogMessage(GetPrgRes()->GetMainWindow(), &msg) )
			{
				TranslateMessage(&msg);
				DispatchMessage(&msg);
			}
		}
	}
}


/*!
	the window-procedure for the main window
*/
BOOL CALLBACK MainWindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static Messages messages;

	if( messages.Empty() )
		// initiation
		MainWindowFunctions::CreateMainMessagesTable(messages);

// in the Messages class we're using the std::map
// so that we have the logarythmic time to find the special function to call
return messages.Call(message, hWnd, message, wParam, lParam);
}