/* Copyright (c) 2002-2012 Croteam Ltd.
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License as published by
the Free Software Foundation

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */

#include "StdH.h"
#include <Engine/CurrentVersion.h>
#include "MenuPrinting.h"
#include "LevelInfo.h"
#include "MLevels.h"


void CLevelsMenu::Initialize_t(void)
{
	gm_mgTitle.mg_boxOnScreen = BoxTitle();
	gm_mgTitle.mg_strText = TRANS("CHOOSE LEVEL");
	gm_lhGadgets.AddTail(gm_mgTitle.mg_lnNode);

	for (INDEX iLabel = 0; iLabel<LEVELS_ON_SCREEN; iLabel++)
	{
		INDEX iPrev = (LEVELS_ON_SCREEN + iLabel - 1) % LEVELS_ON_SCREEN;
		INDEX iNext = (iLabel + 1) % LEVELS_ON_SCREEN;
		// initialize label gadgets
		gm_mgManualLevel[iLabel].mg_pmgUp = &gm_mgManualLevel[iPrev];
		gm_mgManualLevel[iLabel].mg_pmgDown = &gm_mgManualLevel[iNext];
		gm_mgManualLevel[iLabel].mg_boxOnScreen = BoxMediumRow(iLabel);
		gm_mgManualLevel[iLabel].mg_pActivatedFunction = NULL; // never called!
		gm_lhGadgets.AddTail(gm_mgManualLevel[iLabel].mg_lnNode);
	}

	gm_lhGadgets.AddTail(gm_mgArrowUp.mg_lnNode);
	gm_lhGadgets.AddTail(gm_mgArrowDn.mg_lnNode);
	gm_mgArrowUp.mg_adDirection = AD_UP;
	gm_mgArrowDn.mg_adDirection = AD_DOWN;
	gm_mgArrowUp.mg_boxOnScreen = BoxArrow(AD_UP);
	gm_mgArrowDn.mg_boxOnScreen = BoxArrow(AD_DOWN);
	gm_mgArrowUp.mg_pmgRight = gm_mgArrowUp.mg_pmgDown =
		&gm_mgManualLevel[0];
	gm_mgArrowDn.mg_pmgRight = gm_mgArrowDn.mg_pmgUp =
		&gm_mgManualLevel[LEVELS_ON_SCREEN - 1];

	gm_ctListVisible = LEVELS_ON_SCREEN;
	gm_pmgArrowUp = &gm_mgArrowUp;
	gm_pmgArrowDn = &gm_mgArrowDn;
	gm_pmgListTop = &gm_mgManualLevel[0];
	gm_pmgListBottom = &gm_mgManualLevel[LEVELS_ON_SCREEN - 1];
}

void CLevelsMenu::FillListItems(void)
{
	// disable all items first
	for (INDEX i = 0; i<LEVELS_ON_SCREEN; i++) {
		gm_mgManualLevel[i].mg_bEnabled = FALSE;
		gm_mgManualLevel[i].mg_strText = TRANS("<empty>");
		gm_mgManualLevel[i].mg_iInList = -2;
	}

	BOOL bHasFirst = FALSE;
	BOOL bHasLast = FALSE;
	INDEX ctLabels = _lhFilteredLevels.Count();
	INDEX iLabel = 0;
	FOREACHINLIST(CLevelInfo, li_lnNode, _lhFilteredLevels, itli) {
		CLevelInfo &li = *itli;
		INDEX iInMenu = iLabel - gm_iListOffset;
		if ((iLabel >= gm_iListOffset) &&
			(iLabel<(gm_iListOffset + LEVELS_ON_SCREEN)))
		{
			bHasFirst |= (iLabel == 0);
			bHasLast |= (iLabel == ctLabels - 1);
			gm_mgManualLevel[iInMenu].mg_strText = li.li_strName;
			gm_mgManualLevel[iInMenu].mg_fnmLevel = li.li_fnLevel;
			gm_mgManualLevel[iInMenu].mg_bEnabled = TRUE;
			gm_mgManualLevel[iInMenu].mg_iInList = iLabel;
		}
		iLabel++;
	}

	// enable/disable up/down arrows
	gm_mgArrowUp.mg_bEnabled = !bHasFirst && ctLabels>0;
	gm_mgArrowDn.mg_bEnabled = !bHasLast  && ctLabels>0;
}

void CLevelsMenu::StartMenu(void)
{
	// set default parameters for the list
	gm_iListOffset = 0;
	gm_ctListTotal = _lhFilteredLevels.Count();
	gm_iListWantedItem = 0;
	// for each level
	INDEX i = 0;
	FOREACHINLIST(CLevelInfo, li_lnNode, _lhFilteredLevels, itlid) {
		CLevelInfo &lid = *itlid;
		// if it is the chosen one
		if (lid.li_fnLevel == _pGame->gam_strCustomLevel) {
			// demand focus on it
			gm_iListWantedItem = i;
			break;
		}
		i++;
	}
	CGameMenu::StartMenu();
}