/*
 * SystemOptionsWindow.cpp, part of VCMI engine
 *
 * Authors: listed in file AUTHORS in main folder
 *
 * License: GNU General Public License v2.0 or later
 * Full text of license available in license.txt file, in main folder
 *
 */
#include "StdInc.h"

#include "SystemOptionsWindow.h"

#include <SDL_rect.h>
#include <SDL_video.h>

#include "../lib/CGeneralTextHandler.h"
#include "../lib/filesystem/ResourceID.h"
#include "../gui/CGuiHandler.h"
#include "../widgets/Buttons.h"
#include "../widgets/TextControls.h"
#include "../widgets/Images.h"
#include "../CGameInfo.h"
#include "../CMusicHandler.h"
#include "../CPlayerInterface.h"
#include "VcmiSettingsWindow.h"
#include "GUIClasses.h"
#include "CServerHandler.h"
#include "renderSDL/SDL_Extensions.h"


static void setIntSetting(std::string group, std::string field, int value)
{
	Settings entry = settings.write[group][field];
	entry->Float() = value;
}

static void setBoolSetting(std::string group, std::string field, bool value)
{
	Settings fullscreen = settings.write[group][field];
	fullscreen->Bool() = value;
}

static std::string resolutionToString(int w, int h)
{
	return std::to_string(w) + 'x' + std::to_string(h);
}

SystemOptionsWindow::SystemOptionsWindow()
		: InterfaceObjectConfigurable(),
		  onFullscreenChanged(settings.listen["video"]["fullscreen"])
{
	OBJ_CONSTRUCTION_CAPTURING_ALL_NO_DISPOSE;

	const JsonNode config(ResourceID("config/widgets/optionsMenu.json"));
	addCallback("playerHeroSpeedChanged", std::bind(&setIntSetting, "adventure", "heroSpeed", _1));
	addCallback("enemyHeroSpeedChanged", std::bind(&setIntSetting, "adventure", "enemySpeed", _1));
	addCallback("mapScrollSpeedChanged", std::bind(&setIntSetting, "adventure", "scrollSpeed", _1));
	addCallback("heroReminderChanged", std::bind(&setBoolSetting, "adventure", "heroReminder", _1));
	addCallback("quickCombatChanged", std::bind(&setBoolSetting, "adventure", "quickCombat", _1));
	addCallback("spellbookAnimationChanged", std::bind(&setBoolSetting, "video", "spellbookAnimation", _1));
	addCallback("fullscreenChanged", std::bind(&setBoolSetting, "video", "fullscreen", _1));
	addCallback("setGameResolution", std::bind(&SystemOptionsWindow::selectGameResolution, this));
	addCallback("setMusic", [this](int value) { setIntSetting("general", "music", value); widget<CSlider>("musicSlider")->redraw(); });
	addCallback("setVolume", [this](int value) { setIntSetting("general", "sound", value); widget<CSlider>("soundVolumeSlider")->redraw(); });
	build(config);

	std::shared_ptr<CLabel> resolutionLabel = widget<CLabel>("resolutionLabel");
	const auto & currentResolution = settings["video"]["screenRes"];
	resolutionLabel->setText(resolutionToString(currentResolution["width"].Integer(), currentResolution["height"].Integer()));


	std::shared_ptr<CToggleGroup> playerHeroSpeedToggle = widget<CToggleGroup>("heroMovementSpeedPicker");
	playerHeroSpeedToggle->setSelected((int)settings["adventure"]["heroSpeed"].Float());

	std::shared_ptr<CToggleGroup> enemyHeroSpeedToggle = widget<CToggleGroup>("enemyMovementSpeedPicker");
	enemyHeroSpeedToggle->setSelected((int)settings["adventure"]["enemySpeed"].Float());

	std::shared_ptr<CToggleGroup> mapScrollSpeedToggle = widget<CToggleGroup>("mapScrollSpeedPicker");
	mapScrollSpeedToggle->setSelected((int)settings["adventure"]["scrollSpeed"].Float());


	std::shared_ptr<CToggleButton> heroReminderCheckbox = widget<CToggleButton>("heroReminderCheckbox");
	heroReminderCheckbox->setSelected((bool)settings["adventure"]["heroReminder"].Bool());

	std::shared_ptr<CToggleButton> quickCombatCheckbox = widget<CToggleButton>("quickCombatCheckbox");
	quickCombatCheckbox->setSelected((bool)settings["adventure"]["quickCombat"].Bool());

	std::shared_ptr<CToggleButton> spellbookAnimationCheckbox = widget<CToggleButton>("spellbookAnimationCheckbox");
	spellbookAnimationCheckbox->setSelected((bool)settings["video"]["spellbookAnimation"].Bool());

	std::shared_ptr<CToggleButton> fullscreenCheckbox = widget<CToggleButton>("fullscreenCheckbox");
	fullscreenCheckbox->setSelected((bool)settings["video"]["fullscreen"].Bool());
	onFullscreenChanged([&](const JsonNode &newState) //used when pressing F4 etc. to change fullscreen checkbox state
	{
		widget<CToggleButton>("fullscreenCheckbox")->setSelected(newState.Bool());
	});


	std::shared_ptr<CSlider> musicSlider = widget<CSlider>("musicSlider");
	musicSlider->moveTo(CCS->musich->getVolume());

	std::shared_ptr<CSlider> volumeSlider = widget<CSlider>("soundVolumeSlider");
	volumeSlider->moveTo(CCS->soundh->getVolume());
}



void SystemOptionsWindow::selectGameResolution()
{
	std::vector<std::string> items;

#ifndef VCMI_IOS
	Rect displayBounds = CSDL_Ext::getDisplayBounds();
#endif

	size_t currentResolutionIndex = 0;
	size_t i = 0;
	for(const auto & it : conf.guiOptions)
	{
		const auto & resolution = it.first;
#ifndef VCMI_IOS
		if(displayBounds.w < resolution.first || displayBounds.h < resolution.second)
			continue;
#endif

		auto resolutionStr = resolutionToString(resolution.first, resolution.second);
		if(widget<CLabel>("resolutionLabel")->getText() == resolutionStr)
			currentResolutionIndex = i;
		items.push_back(std::move(resolutionStr));
		++i;
	}

	GH.pushIntT<CObjectListWindow>(items, nullptr,
								   CGI->generaltexth->translate("vcmi.systemOptions.resolutionMenu.hover"),
								   CGI->generaltexth->translate("vcmi.systemOptions.resolutionMenu.help"),
								   std::bind(&SystemOptionsWindow::setGameResolution, this, _1),
								   currentResolutionIndex);
}

void SystemOptionsWindow::setGameResolution(int index)
{
	auto iter = conf.guiOptions.begin();
	std::advance(iter, index);

	//do not set resolution to illegal one (0x0)
	assert(iter!=conf.guiOptions.end() && iter->first.first > 0 && iter->first.second > 0);

	Settings gameRes = settings.write["video"]["screenRes"];
	gameRes["width"].Float() = iter->first.first;
	gameRes["height"].Float() = iter->first.second;

	std::string resText;
	resText += boost::lexical_cast<std::string>(iter->first.first);
	resText += "x";
	resText += boost::lexical_cast<std::string>(iter->first.second);
	widget<CLabel>("resolutionLabel")->setText(resText);
}