// knobodde.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "windows.h"

#include <iostream>
using namespace std;


char szAppCaption[] = "Using DDE for Communications";

char szAppName[] = "sample_server";
char szTopic[] = "edit_field_data";

HINSTANCE hInst;
DWORD idInst;
HWND hwndApp;

char szBuffer[8192];


HDDEDATA CALLBACK
DDECallBack (UINT iType, UINT iFmt, HCONV hConv, HSZ hsz1, HSZ hsz2,
	HDDEDATA hData, DWORD dwData1, DWORD dwData2)
{
	char dataMsg[] = "yo from knobo";
	DWORD cb;

	switch (iType) 
    { 
        case XTYP_REGISTER: 

			cout << "Callback: XTYP_REGISTER\n";
            return (HDDEDATA) NULL; 

        case XTYP_UNREGISTER: 

			cout << "Callback: XTYP_UNREGISTER\n";
			// TODO
            return (HDDEDATA) NULL; 
 
        case XTYP_ADVDATA: 

			cout << "Callback: XTYP_ADVDATA\n";
			// TODO
			return (HDDEDATA) DDE_FACK; 
 
        case XTYP_XACT_COMPLETE: 
            
			cout << "Callback: XTYP_XACT_cOMPLETE\n";
            //           
            return (HDDEDATA) NULL; 
 
        case XTYP_DISCONNECT: 
            
			cout << "Callback: XTYP_DISCONNECT\n";
			// hsz1 A handle to the topic name. If this parameter is NULL, the client is requesting a conversation on all topic names that the server supports.
            // hsz2 A handle to the service name. If this parameter is NULL, the client is requesting a conversation on all service names that the server supports.
						
            return (HDDEDATA) NULL; 

		case XTYP_WILDCONNECT: 
			HSZPAIR ahszp[2];

			HSZ hszSvc;
			HSZ hszTopic;
			hszSvc   = DdeCreateStringHandle(idInst, (LPCWSTR) "KNOBO", CP_WINANSI); 
			hszTopic = DdeCreateStringHandle(idInst, (LPCWSTR) "Random",   CP_WINANSI); 

			ahszp[0].hszSvc = hszSvc; 
			ahszp[0].hszTopic = hszTopic; 

			ahszp[1].hszSvc = NULL; 
			ahszp[1].hszTopic = NULL; 

			cout << "Callback: XTYP_WILDCONNECT\n";
            //           
            return (HDDEDATA) NULL;
				
				/* DdeCreateDataHandle( 
								idInst,          // instance identifier 
								(LPBYTE) &ahszp, // pointer to HSZPAIR array 
								sizeof(HSZ) * 2, // length of the array 
								0,               // start at the beginning 
								(HSZ) NULL,      // no item name string 
								0,               // return the same format 
								0);              // let the system own it ;  */

		case XTYP_CONNECT: 
			cout << "Callback: XTYP_CONNECT\n";
		
			// hsz1 A handle to the topic name.
			// hsz2 A handle to the service name.

			PSTR pszServName; 

			cb = DdeQueryString(idInst, hsz1, (LPTSTR) NULL, 0, CP_WINANSI) + 1; 
			pszServName = (PSTR) LocalAlloc(LPTR, (UINT) cb); 
			DdeQueryString(idInst, hsz1, (LPWSTR) pszServName, cb, CP_WINANSI); 
			
			wcout << "Printing pszSerName: " <<   pszServName <<  ";" <<endl;

	
            return (HDDEDATA) true; 
		case XTYP_CONNECT_CONFIRM:
			cout << "Connection confirmed\n";
			return (HDDEDATA) NULL;

		case XTYP_REQUEST:
			int len;
			cout << "XTYP_REQUEST\n";
			len = strlen(dataMsg);
			dataMsg[len] = '\0';
			return  DdeCreateDataHandle( 
								idInst,           // instance identifier 
								(LPBYTE) dataMsg, // pointer to HSZPAIR array 
								len + 1,		  // length of the array -- sizeof(HSZ) *
								0,                // start at the beginning 
								hsz2,             // no item name string 
								CF_TEXT,          // return the same format 
								0);               // let the system own it ;  */

			
        default:
			cout << "Callback: Default: " << iType << endl;
			return (HDDEDATA) NULL; 
	} 
} 


int _tmain(int argc, _TCHAR* argv[])
{
	static HSZ hszService;
	MSG msg;

	if (DdeInitialize ( &idInst, (PFNCALLBACK)DDECallBack,
					    CBF_FAIL_EXECUTES , 0)  /* | CBF_SKIP_REGISTRATIONS | CBF_FAIL_POKES  | CBF_SKIP_UNREGISTRATIONS */
						) {
		cout << "Cannot initialize the server!";
		return FALSE;
	}	/* endif */


			hszService = DdeCreateStringHandle (idInst, (LPCWSTR)"KNOBO", CP_WINANSI);
			DdeNameService (idInst, hszService, NULL, DNS_FILTEROFF);

	cout << "registred\n";


    while (GetMessage (&msg, NULL, 0, 0)) {
		cout << "Getting message\n";
		TranslateMessage (&msg);
		DispatchMessage (&msg);
	}	/* end while */


	DdeUninitialize (idInst);


	cout << "knobotest\n";
	return 0;
}