/* (C) 2003 XDA Developers
 * Author: Willem Jan Hengeveld <itsme@xs4all.nl>
 * Web: http://www.xda-developers.com/
 *
 * $Header$
 */
#include "stdafx.h"
#include "switcher.h"
#include "debug.h"

BandSwitcher::BandSwitcher()
{
	g_gsm.open();

	g_gsm.send(CString(L"ATV1E1\r"));

	CString reply;
	g_gsm.receive(reply);

	// ignore reply
}
BandSwitcher::~BandSwitcher()
{
	g_gsm.close();
}

Band BandSwitcher::GetCurrentBand()
{
	g_gsm.flush();

	if (!g_gsm.send(CString(L"AT%BAND\r")))
	{
		debug("error getting band\n");
		return BAND_UNKNOWN;
	}
	Sleep(200);
	CString reply;
	if (!g_gsm.receive(reply))
	{
		debug("error getting band - no reply\n");
		return BAND_UNKNOWN;
	}
	int bandpos= reply.Find(L"+BAND:");
	if (bandpos<0)
	{
		debug("error getting band - unknown reply: %ls\n", reply.GetBuffer(0));
		return BAND_UNKNOWN;
	}
	long curband= _tcstol(reply.Mid(bandpos+7).GetBuffer(0), 0, 0); 
	switch (curband)
	{
		case 1: return BAND_900;
		case 3: return BAND_1900;
		case 6: return BAND_900_1800;
		default:
			debug("current band: unknown reply: %ls\n", reply.GetBuffer(0));
			return BAND_UNKNOWN;
	}
}

bool BandSwitcher::SwitchTo(Band band)
{
	TCHAR *req= NULL;
	switch(band)
	{
	case BAND_900:		req= L"AT%CHG900\r"; break;
	case BAND_1900:		req= L"AT%CHG1900\r"; break;
	case BAND_900_1800: req= L"AT%CHGDUAL\r"; break;
	}

	if (req==NULL)
		return false;
	g_gsm.flush();
	if (!g_gsm.send(CString(req)))
		return false;

	CString reply;
	if (!g_gsm.receive(reply))
		return false;

	int okpos= reply.Find(L"OK");
	if (okpos<0)
		return false;

	return true;
}