/*
	Helper functions for various list implementations in neutrino
	Copyright (C) 2016 Stefan Seyfried

	License: GPL

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	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, see http://www.gnu.org/licenses/
*/

#include <driver/rcinput.h>
#include "listhelpers.h"

#include <global.h>
#include <gui/bouquetlist.h>
#include <libupnpclient/upnpclient.h>
#include <timerdclient/timerdtypes.h>

static int upDownKey(int size, neutrino_msg_t msg, int lines, int sel)
{
	int step;
	if (size <= 0) /* list.empty() or similar... */
		return -1;

	if (msg >= CRCInput::RC_MaxRC) {
		printf("CListHelpers:%s: invalid key? 0x%lx\n", __func__, msg);
		return -1;
	}
	int key = (int)msg;
	if (key == g_settings.key_pageup)
		step = -lines;
	else if (key == g_settings.key_pagedown)
		step = lines;
	else if (msg == CRCInput::RC_up)
		step = -1;
	else if (msg == CRCInput::RC_down)
		step = 1;
	else {
		printf("CListHelpers:%s: invalid key? 0x%lx\n", __func__, msg);
		return -1;
	}
	// printf("CListHelpers:%s: key 0x%04lx lines %d size %d sel %d\n", __func__, msg, lines, size, sel);
	int new_sel = sel + step;
	if (new_sel < 0) {
		if (sel != 0 && step != 1)
			new_sel = 0;
		else
			new_sel = size - 1;
	}
	else if (new_sel > size - 1) {
		if (sel != size - 1)
			new_sel = size - 1;
		else
			new_sel = 0;
	}
	return new_sel;
}

int CListHelpers::_UpDownKey(int size, neutrino_msg_t msg, int lines, int sel, _id<int>)
{
	return upDownKey(size, msg, lines, sel);
}

template <typename T> int CListHelpers::_UpDownKey(T list, neutrino_msg_t msg, int lines, int sel, _id<T>)
{
	return upDownKey(list.size(), msg, lines, sel);
}

/* all used versions need to be prototyped here, to avoid linker errors */
/* helper macro for the prototypes */
#define updown_t(x) template int CListHelpers::_UpDownKey<x >(x, neutrino_msg_t, int, int, _id<x >)
updown_t(std::vector<CBouquet*>);
updown_t(std::vector<CZapitBouquet*>);
updown_t(std::vector<CZapitChannel*>);
updown_t(std::vector<CChannelEvent>);
updown_t(std::vector<CUPnPDevice>);
updown_t(std::vector<CTimerd::responseGetTimer>);