/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */

#include "StdH.h"
#include <Engine/CurrentVersion.h>
#include "MenuPrinting.h"
#include "VarList.h"
#include "MVar.h"

extern BOOL _bVarChanged;


void CVarMenu::Initialize_t(void)
{
	gm_mgTitle.mg_boxOnScreen = BoxTitle();
	gm_mgTitle.mg_strText = "";
	gm_lhGadgets.AddTail(gm_mgTitle.mg_lnNode);

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

	gm_mgApply.mg_boxOnScreen = BoxMediumRow(16.5f);
	gm_mgApply.mg_bfsFontSize = BFS_LARGE;
	gm_mgApply.mg_iCenterI = 1;
	gm_mgApply.mg_pmgLeft =
		gm_mgApply.mg_pmgRight =
		gm_mgApply.mg_pmgUp =
		gm_mgApply.mg_pmgDown = &gm_mgVar[0];
	gm_mgApply.mg_strText = TRANS("APPLY");
	gm_mgApply.mg_strTip = TRANS("apply changes");
	gm_lhGadgets.AddTail(gm_mgApply.mg_lnNode);
	gm_mgApply.mg_pActivatedFunction = NULL;

	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_mgVar[0];
	gm_mgArrowDn.mg_pmgRight = gm_mgArrowDn.mg_pmgUp =
		&gm_mgVar[VARS_ON_SCREEN - 1];

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

void CVarMenu::FillListItems(void)
{
	// disable all items first
	for (INDEX i = 0; i<VARS_ON_SCREEN; i++) {
		gm_mgVar[i].mg_bEnabled = FALSE;
		gm_mgVar[i].mg_pvsVar = NULL;
		gm_mgVar[i].mg_iInList = -2;
	}
	BOOL bHasFirst = FALSE;
	BOOL bHasLast = FALSE;
	INDEX ctLabels = _lhVarSettings.Count();
	INDEX iLabel = 0;

	FOREACHINLIST(CVarSetting, vs_lnNode, _lhVarSettings, itvs) {
		CVarSetting &vs = *itvs;
		INDEX iInMenu = iLabel - gm_iListOffset;
		if ((iLabel >= gm_iListOffset) &&
			(iLabel<(gm_iListOffset + VARS_ON_SCREEN)))
		{
			bHasFirst |= (iLabel == 0);
			bHasLast |= (iLabel == ctLabels - 1);
			gm_mgVar[iInMenu].mg_pvsVar = &vs;
			gm_mgVar[iInMenu].mg_strTip = vs.vs_strTip;
			gm_mgVar[iInMenu].mg_bEnabled = gm_mgVar[iInMenu].IsEnabled();
			gm_mgVar[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 CVarMenu::StartMenu(void)
{
	LoadVarSettings(gm_fnmMenuCFG);
	// set default parameters for the list
	gm_iListOffset = 0;
	gm_ctListTotal = _lhVarSettings.Count();
	gm_iListWantedItem = 0;
	CGameMenu::StartMenu();
}

void CVarMenu::EndMenu(void)
{
	// disable all items first
	for (INDEX i = 0; i<VARS_ON_SCREEN; i++) {
		gm_mgVar[i].mg_bEnabled = FALSE;
		gm_mgVar[i].mg_pvsVar = NULL;
		gm_mgVar[i].mg_iInList = -2;
	}
	FlushVarSettings(FALSE);
	_bVarChanged = FALSE;
}

void CVarMenu::Think(void)
{
	gm_mgApply.mg_bEnabled = _bVarChanged;
	extern void FixupBackButton(CGameMenu *pgm);
	FixupBackButton(this);
}