#include "boe.global.hpp"
#include "universe.hpp"

#include <boost/filesystem/operations.hpp>
#include <unordered_map>
#include <string>
#include <memory>
#include "boe.graphics.hpp"
#include "boe.minimap.hpp"
#include "boe.newgraph.hpp"
#include "boe.fileio.hpp"
#include "boe.actions.hpp"
#include "boe.text.hpp"
#include "boe.party.hpp"
#include "boe.items.hpp"
#include "boe.locutils.hpp"
#include "boe.town.hpp"
#include "boe.dlgutil.hpp"
#include "boe.infodlg.hpp"
#include "boe.main.hpp"
#include "boe.consts.hpp"
#include "boe.ui.hpp"
#include "winutil.hpp"
#include "sounds.hpp"
#include "render_image.hpp"
#include "tiling.hpp"
#include "mathutil.hpp"
#include "fileio.hpp"
#include "strdlog.hpp"
#include "choicedlog.hpp"
#include "scrollbar.hpp"
#include "boe.menus.hpp"
#include "cursors.hpp"
#include "prefs.hpp"
#include "button.hpp"
#include "enum_map.hpp"
#include "framerate_limiter.hpp"
#include "event_listener.hpp"
#include "drawable_manager.hpp"
bool All_Done = false;
sf::RenderWindow mainPtr;
short had_text_freeze = 0,num_fonts;
bool first_startup_update = true;
bool first_sound_played = false,spell_forced = false;
bool party_in_memory = false;
std::shared_ptr<cScrollbar> text_sbar, item_sbar, shop_sbar;
std::shared_ptr<cButton> done_btn, help_btn;
// TODO: move these 3 to boe.ui.cpp ?
extern const rectangle sbar_rect      = {285,560,423,576};
extern const rectangle shop_sbar_rect = {69,272,359,288};
extern const rectangle item_sbar_rect = {148,560,255,576};
bool bgm_on = false,bgm_init = false;
location store_anim_ul;
cUniverse univ;

bool flushingInput = false, ae_loading = false;
long start_time;

short on_spell_menu[2][62];
short on_monst_menu[256];

extern sf::View mainView;

extern rectangle shop_frame;
extern enum_map(eGuiArea, rectangle) win_to_rects;

std::string scenario_temp_dir_name = "scenario";

/* Display globals */
short combat_posing_monster = -1, current_working_monster = -1; // 0-5 PC 100 + x - monster x
short fast_bang = false; // Note: This mostly behaves as a boolean variable, but values other than 1 are assigned to it, so I made it a short
std::vector<int> spec_item_array;
short current_spell_range;
eGameMode overall_mode = MODE_STARTUP;
bool changed_display_mode = false;
eItemWinMode stat_window = ITEM_WIN_PC1;
bool monsters_going = false,boom_anim_active = false;
bool finished_init = false;

short which_item_page[6] = {0,0,0,0,0,0}; // Remembers which of the 2 item pages pc looked at
short current_ground = 0;
eStatMode stat_screen_mode;
short anim_step = -1;

// Spell casting globals
eSpell store_mage = eSpell::LIGHT, store_priest = eSpell::BLESS_MINOR;
short store_mage_lev = 0, store_priest_lev = 0;
short store_spell_target = 6,pc_casting;
short num_targets_left = 0;
location spell_targets[8];

/* Combat globals */
short which_combat_type;
location center;
short combat_active_pc;
effect_pat_type current_pat;
short missile_firer,current_monst_tactic;
short store_current_pc = 0;

// TODO: these should be members of some global entity instead of being here
std::unordered_map <std::string, std::shared_ptr <iEventListener>> event_listeners;
cDrawableManager drawable_mgr;

sf::Clock animTimer;
extern long anim_ticks;

fs::path pending_file_to_load=fs::path();

static void init_boe(int, char*[]);
static void showWelcome();

#ifdef __APPLE__
eMenuChoice menuChoice=eMenuChoice::MENU_CHOICE_NONE;
short menuChoiceId=-1;
bool pending_quit=false;
#endif

int main(int argc, char* argv[]) {
#if 0
	void debug_oldstructs();
	debug_oldstructs();
#endif
	try{
		init_boe(argc, argv);
		
		if(!get_bool_pref("GameRunBefore"))
			showWelcome();
		else if(!ae_loading && pending_file_to_load.empty() && get_bool_pref("GiveIntroHint", true))
			tip_of_day();
		set_pref("GameRunBefore", true);
		finished_init = true;
		
		if(ae_loading) {
			finish_load_party();
			post_load();
		}
		
		menu_activate();
		restore_cursor();

		handle_events();

		close_program();
		return 0;
	} catch(std::exception& x) {
		showFatalError(x.what());
		throw;
	} catch(std::string& x) {
		showFatalError(x);
		throw;
	} catch(...) {
		showFatalError("An unknown error occurred!");
		throw;
	}
}

static void init_sbar(std::shared_ptr<cScrollbar>& sbar, const std::string& name, rectangle rect, rectangle events_rect, int max, int pgSz, int start = 0) {
	sbar.reset(new cScrollbar(mainPtr));
	sbar->setBounds(rect);
	sbar->setMaximum(max);
	sbar->setPosition(start);
	sbar->setPageSize(pgSz);
	sbar->set_wheel_event_rect(events_rect);
	sbar->hide();
	
	drawable_mgr.add_drawable(UI_LAYER_DEFAULT, name, sbar);
	event_listeners[name] = std::dynamic_pointer_cast<iEventListener>(sbar);
}

static void init_scrollbars() {

	// Cover entire transcript + scrollbar
	const rectangle transcript_events_rect {
		win_to_rects[WINRECT_TRANSCRIPT].top,
		win_to_rects[WINRECT_TRANSCRIPT].left,
		sbar_rect.bottom,
		sbar_rect.right
	};
	
	// Cover entire inventory + scrollbar
	const rectangle inventory_events_rect {
		win_to_rects[WINRECT_INVEN].top,
		win_to_rects[WINRECT_INVEN].left,
		item_sbar_rect.bottom,
		item_sbar_rect.right
	};
	
	// MAGIC NUMBERS: max size, page size, initial position - all in abstract "step" units
	init_sbar(text_sbar, "transcript-scrollbar", sbar_rect, transcript_events_rect, 58, 11, 58);
	init_sbar(item_sbar, "inventory-scrollbar", item_sbar_rect, inventory_events_rect, 16, 8);
	init_sbar(shop_sbar, "shop-scrollbar", shop_sbar_rect, shop_frame, 16, 8);	
}

static void init_btn(std::shared_ptr<cButton>& btn, eBtnType type, location loc) {
	btn.reset(new cButton(mainPtr));
	btn->setBtnType(type);
	btn->relocate(loc);
	btn->hide();
}

static void init_buttons() {
	
	// MAGIC NUMBERS: move to boe.ui.cpp ?
	
	init_btn(done_btn, BTN_DONE, {231,395});
	init_btn(help_btn, BTN_HELP, {273,12});
}

// NOTE: this should possibly be moved to boe.ui.cpp at some point
static void init_ui() {
	cDialog::init();
	init_scrollbars();
	init_buttons();
}

void init_boe(int argc, char* argv[]) {
#ifdef __APPLE__
	set_up_apple_events(argc, argv);
#endif
	init_directories(argv[0]);
#ifdef __APPLE__
	init_menubar(); // Do this first of all because otherwise a default File and Window menu will be seen
#endif
	sync_prefs();
	init_shaders();
	init_tiling();
	init_snd_tool();
	
	init_ui();
	
	adjust_window_mode();
	// If we don't do this now it'll flash white to start with
	mainPtr.clear(sf::Color::Black);
	mainPtr.display();
	
	set_cursor(watch_curs);
	init_buf();
	check_for_intel();
	srand(time(nullptr));
	init_screen_locs();	
	init_startup();
	flushingInput = true;
	// Hidden preference to hide the startup logo - should be kept hidden
	if(get_bool_pref("ShowStartupLogo", true))
		show_logo();
	// The preference to hide the startup splash is exposed however.
	if(get_bool_pref("ShowStartupSplash", true))
		plop_fancy_startup();
	
	cUniverse::print_result = iLiving::print_result = add_string_to_buf;
	cPlayer::give_help = give_help;
	init_fileio();
	init_spell_menus();
	minimap::init();
	redraw_screen(REFRESH_NONE);
	showMenuBar();
}

void showWelcome() {
	cChoiceDlog welcome("welcome");
	welcome->attachClickHandlers([](cDialog& self, std::string clicked, eKeyMod) {
		launchURL(self[clicked].getText());
		return false;
	}, {"spidweb", "scen", "forum", "home", "src"});
	welcome.show();
}

void handle_events() {
	sf::Event currentEvent;
	cFramerateLimiter fps_limiter;

	while(!All_Done) {
		bool need_redraw=false;
#ifdef __APPLE__
		if (pending_quit) {
			pending_quit=false;
			handle_menu_choice(eMenu::QUIT);
			if (All_Done) break;
		}
		if (!pending_file_to_load.empty()) {
			// TODO: What if they're already in a scenario? It should ask for confirmation, right?
			do_load(pending_file_to_load);
			pending_file_to_load.clear();
		}
		if (menuChoiceId>=0) {
			eMenuChoice aMenuChoice=menuChoice;
			menuChoice=eMenuChoice::MENU_CHOICE_NONE;
			need_redraw=true;
			switch(aMenuChoice) {
				case eMenuChoice::MENU_CHOICE_GENERIC:
					handle_menu_choice(eMenu(menuChoiceId));
					break;
				case eMenuChoice::MENU_CHOICE_SPELL:
					handle_menu_spell(eSpell(menuChoiceId));
					break;
				case eMenuChoice::MENU_CHOICE_MONSTER_INFO:
					handle_monster_info_menu(menuChoiceId);
					break;
				case eMenuChoice::MENU_CHOICE_NONE:
					need_redraw=false;
					break;
			}
			menuChoiceId=-1;
		}
#endif
		while(!changed_display_mode && mainPtr.pollEvent(currentEvent)) {
			need_redraw=true;
			handle_one_event(currentEvent);
			if(!changed_display_mode && minimap::need_redraw()) minimap::draw(true);
		}

		// It would be nice to have minimap inside the main game window (we have lots of screen space in fullscreen mode).
		// Alternatively, minimap could live on its own thread.
		// But for now we just handle events from both windows on this thread.
		while(!changed_display_mode && minimap::pollEvent())
			; // actually, we only check gain focus and close event

		if(changed_display_mode) {
			need_redraw = true;
			changed_display_mode = false;
			adjust_window_mode();
			minimap::init();
		}

		// Still no idea what this does. It's possible that this does not work at all.
		flushingInput = false;

		// Ideally this call should update all of the things that are happening in the world current tick.
		// NOTE that update does not mean draw.
		if (update_everything())
			need_redraw=true;

		// Ideally, this should be the only draw call that is done in a cycle.
		if (need_redraw)
			redraw_everything();

		// Prevent the loop from executing too fast.
		fps_limiter.frame_finished();
	}
}

void handle_one_event(const sf::Event& event) {

	// What does this do and should it be here?
	through_sending();

	// What does this do and should it be here?
	clear_sound_memory();

	// Check if any of the event listeners want this event.
	for(auto & listener : event_listeners) {
		if(listener.second->handle_event(event)) return;
	}

	switch(event.type) {
		case sf::Event::KeyPressed:
			if(flushingInput) return;
			if(!(event.key.*systemKey)) handle_keystroke(event);
			break;
			
		case sf::Event::MouseButtonPressed:
			if(flushingInput) return;
			Mouse_Pressed(event);
			break;
			
		case sf::Event::MouseLeft:
			// Make sure we don't have an arrow cursor when it's outside the window
			set_cursor(sword_curs);
			break;
			
		case sf::Event::GainedFocus:
			makeFrontWindow(mainPtr);
			change_cursor({event.mouseMove.x, event.mouseMove.y});
			return;

		case sf::Event::MouseMoved:
			change_cursor({event.mouseMove.x, event.mouseMove.y});
			return;

		// TODO: EVENT TYPE DEPRECATED IN SFML 2.5.1
		case sf::Event::MouseWheelMoved:
			if(flushingInput) return;
			handle_scroll(event);
			break;
			
		case sf::Event::Closed:
			if(overall_mode == MODE_STARTUP) {
				if(party_in_memory) {
					std::string choice = cChoiceDlog("quit-confirm-save", {"save","quit","cancel"}).show();
					if(choice == "cancel") break;
					if(choice == "save") {
						fs::path file = nav_put_party();
						if(!file.empty()) break;
						save_party(file, univ);
					}
				}
				All_Done = true;
				break;
			}
			if(overall_mode == MODE_TOWN || overall_mode == MODE_OUTDOORS){
				std::string choice = cChoiceDlog("quit-confirm-save", {"save", "quit", "cancel"}).show();
				if(choice == "cancel")
					break;
				if(choice == "save")
					save_party(univ.file, univ);
			} else {
				std::string choice = cChoiceDlog("quit-confirm-nosave", {"quit", "cancel"}).show();
				if(choice == "cancel")
					break;
			}
			All_Done = true;
		default:
			break; // There's several events we don't need to handle at all
	}
}

static bool update_terrain_animation() {
	static const long fortyTicks = time_in_ticks(40).asMilliseconds();

	if(overall_mode == MODE_STARTUP) return false;
	if(!get_bool_pref("DrawTerrainAnimation", true)) return false;
	if(animTimer.getElapsedTime().asMilliseconds() < fortyTicks) return false;

	anim_ticks++;
	animTimer.restart();
	return true;
}

static bool update_startup_animation() {
	static const long twentyTicks = time_in_ticks(20).asMilliseconds();

	if(overall_mode != MODE_STARTUP) return false;
	if(animTimer.getElapsedTime().asMilliseconds() < twentyTicks) return false;

	draw_startup_anim(true);
	animTimer.restart();
	return true;
}

bool update_everything() {
	return update_terrain_animation() ||
		update_startup_animation();
}

void redraw_everything() {
	redraw_screen(REFRESH_ALL);
	minimap::draw(false);
}

void Mouse_Pressed(const sf::Event& event) {

	// What is this stuff? Why is it here?
	if(had_text_freeze > 0) {
		had_text_freeze--;
		return;
	}
	
	if(overall_mode == MODE_STARTUP) {
		All_Done = handle_startup_press({event.mouseButton.x, event.mouseButton.y});
	} else {
		All_Done = handle_action(event);
	}
	
	// Why does every mouse click activate a menu?
	menu_activate();
}

void close_program() {
	// TODO: Ultimately we would like to have cleanup happen automatically, negating the need for this function
	// On the Mac, prefs are synced automatically. However, doing it manually won't hurt.
	// On other platforms, we need to do it manually.
	sync_prefs();
}

extern fs::path progDir;
void handle_menu_choice(eMenu item_hit) {
	std::string dialogToShow;
	sf::Event dummyEvent = {sf::Event::KeyPressed};
	short choice;
	
	switch(item_hit) {
		case eMenu::NONE: break;
		case eMenu::FILE_OPEN:
			do_load();
			break;
		case eMenu::FILE_SAVE:
			do_save(0);
			break;
		case eMenu::FILE_SAVE_AS:
			do_save(1);
			break;
		case eMenu::FILE_NEW:
			if(overall_mode != MODE_STARTUP) {
				std::string choice = cChoiceDlog("restart-game",{"okay","cancel"}).show();
				if(choice == "cancel")
					return;
				for(short i = 0; i < 6; i++)
					univ.party[i].main_status = eMainStatus::ABSENT;
				party_in_memory = false;
				reload_startup();
				overall_mode = MODE_STARTUP;
				draw_startup(0);
			}
			start_new_game();
			draw_startup(0);
			menu_activate();
			break;
		case eMenu::FILE_ABORT:
			if(overall_mode != MODE_STARTUP) {
				std::string choice = cChoiceDlog("abort-game",{"okay","cancel"}).show();
				if (choice=="cancel") return;
				reload_startup();
				overall_mode = MODE_STARTUP;
			}
			party_in_memory = false;
			draw_startup(0);
			menu_activate();
			break;
		case eMenu::PREFS:
			pick_preferences();
			break;
		case eMenu::QUIT:
			if(overall_mode == MODE_STARTUP) {
				if(party_in_memory) {
					std::string choice = cChoiceDlog("quit-confirm-save", {"save","quit","cancel"}).show();
					if(choice == "cancel") break;
					if(choice == "save") {
						fs::path file = nav_put_party();
						if(!file.empty()) break;
						save_party(file, univ);
					}
				}
				All_Done = true;
				break;
			}
			if(overall_mode == MODE_TOWN || overall_mode == MODE_OUTDOORS) {
				std::string choice = cChoiceDlog("quit-confirm-save",{"quit","save","cancel"}).show();
				if(choice == "cancel")
					break;
				if(choice == "save") {
					if(univ.file.empty()) {
						univ.file = nav_put_party();
						if(univ.file.empty()) break;
					}
					save_party(univ.file, univ);
				}
			} else {
				std::string choice = cChoiceDlog("quit-confirm-nosave",{"quit","cancel"}).show();
				if(choice == "cancel")
					return;
			}
			All_Done = true;
			break;
		case eMenu::OPTIONS_PC_GRAPHIC:
			choice = char_select_pc(1,"New graphic for who?");
			if(choice < 6)
				pick_pc_graphic(choice,1,nullptr);
			draw_terrain();
			break;
			
		case eMenu::OPTIONS_DELETE_PC:
			if(!prime_time()) {
				ASB("Finish what you're doing first.");
				print_buf();
			}
			else {
				choice = char_select_pc(1,"Delete who?");
				if(choice < 6) {
					std::string confirm = cChoiceDlog("delete-pc-confirm",{"yes","no"}).show();
					if(confirm == "yes")
						kill_pc(univ.party[choice],eMainStatus::ABSENT);
				}
				draw_terrain();
			}
			break;
			
			
		case eMenu::OPTIONS_RENAME_PC:
			choice = char_select_pc(1,"Rename who?");
			if(choice < 6)
				pick_pc_name(choice,nullptr);
			put_pc_screen();
			put_item_screen(stat_window);
			break;
			
			
		case eMenu::OPTIONS_NEW_PC:
			if(!(is_town())) {
				add_string_to_buf("Add PC: Town mode only.");
				print_buf();
				break;
			}
			if(univ.party.free_space() == 6) {
				ASB("Add PC: You already have 6 PCs.");
				print_buf();
				break;
			}
			if(univ.town->has_tavern) {
				give_help(56,0);
				create_pc(6,nullptr);
			} else {
				add_string_to_buf("Add PC: You cannot add new characters in this town. Try in the town you started in.", 2);
			}
			print_buf();
			put_pc_screen();
			put_item_screen(stat_window);
			break;
			
		case eMenu::OPTIONS_JOURNAL:
			journal();
			break;
		case eMenu::OPTIONS_TALK_NOTES:
			if(overall_mode == MODE_TALKING) {
				ASB("Talking notes: Can't read while talking.");
				print_buf();
				return;
			}
			talk_notes();
			break;
		case eMenu::OPTIONS_ENCOUNTER_NOTES:
			adventure_notes();
			break;
		case eMenu::OPTIONS_STATS:
			if(overall_mode != MODE_STARTUP)
				print_party_stats();
			break;
		case eMenu::HELP_OUT:
			dialogToShow = "help-outdoor";
			break;
		case eMenu::HELP_TOWN:
			dialogToShow = "help-town";
			break;
		case eMenu::HELP_COMBAT:
			dialogToShow = "help-combat";
			break;
		case eMenu::HELP_BARRIER:
			dialogToShow = "help-fields";
			break;
		case eMenu::HELP_HINTS:
			dialogToShow = "help-hints";
			break;
		case eMenu::HELP_SPELLS:
			dialogToShow = "help-magic";
			break;
		case eMenu::ABOUT:
			dialogToShow = "about-boe";
			break;
		case eMenu::LIBRARY_MAGE:
			display_spells(eSkill::MAGE_SPELLS,100,0);
			break;
		case eMenu::LIBRARY_PRIEST:
			display_spells(eSkill::PRIEST_SPELLS,100,0);
			break;
		case eMenu::LIBRARY_SKILLS:
			display_skills(eSkill::INVALID,0);
			break;
		case eMenu::LIBRARY_ALCHEMY:
			// TODO: Create a dedicated dialog for alchemy info
			display_alchemy();
			break;
		case eMenu::LIBRARY_TIPS:
			tip_of_day();
			break;
		case eMenu::LIBRARY_INTRO:
			showWelcome();
			break;
		case eMenu::ACTIONS_ALCHEMY:
			dummyEvent.key.code = sf::Keyboard::A;
			dummyEvent.key.shift = true;
			handle_keystroke(dummyEvent);
			break;
		case eMenu::ACTIONS_WAIT:
			dummyEvent.key.code = sf::Keyboard::W;
			handle_keystroke(dummyEvent);
			break;
		case eMenu::ACTIONS_AUTOMAP:
			if(!prime_time()) {
				ASB("Finish what you're doing first.");
				print_buf();
			} else
				minimap::set_visible(true);
			set_cursor(sword_curs);
			break;
		case eMenu::HELP_TOC:
			if(fs::is_directory(progDir/"doc"))
				launchURL("file://" + (progDir/"doc/game/Contents.html").string());
			else launchURL("http://openboe.com/docs/game/Contents.html");
			break;
		case eMenu::ABOUT_MAGE:
		case eMenu::ABOUT_PRIEST:
			give_help(209,0);
			break;
		case eMenu::ABOUT_MONSTERS:
			give_help(212,0);
			break;
	}
	if(!dialogToShow.empty()) {
		cChoiceDlog dlog(dialogToShow);
		dlog.show();
	}
}

//  TODO: Let this function take a cMonster* instead of the item_hit
void handle_monster_info_menu(int item_hit) {
	display_monst(item_hit - 1, nullptr,1);
}

static cursor_type get_mode_cursor(){
	switch(overall_mode){
		case MODE_TOWN_TARGET:
		case MODE_SPELL_TARGET:
		case MODE_FIRING:
		case MODE_THROWING:
		case MODE_FANCY_TARGET:
			return target_curs;
		case MODE_TALK_TOWN:
			return talk_curs;
		case MODE_USE_TOWN:
			return key_curs;
		case MODE_BASH_TOWN:
			return boot_curs;
		case MODE_DROP_TOWN:
		case MODE_DROP_COMBAT:
			return drop_curs;
		case MODE_LOOK_OUTDOORS:
		case MODE_LOOK_TOWN:
		case MODE_LOOK_COMBAT:
			return look_curs;
		case MODE_RESTING:
			return wait_curs;
		default:
			return sword_curs;
	}
	return sword_curs; // this should never be reached, though
}

void change_cursor(location where_curs) {
	cursor_type cursor_needed;
	location cursor_direction;
	extern enum_map(eGuiArea, rectangle) win_to_rects;
	rectangle world_screen = win_to_rects[WINRECT_TERVIEW];
	world_screen.inset(13, 13);
	
	where_curs = mainPtr.mapPixelToCoords(where_curs, mainView);
	
	if(!world_screen.contains(where_curs))
		cursor_needed = sword_curs;
	else cursor_needed = get_mode_cursor();
	
	if((overall_mode == MODE_OUTDOORS || overall_mode == MODE_TOWN || overall_mode == MODE_COMBAT) && world_screen.contains(where_curs)){
		cursor_direction = get_cur_direction(where_curs);
		cursor_needed = arrow_curs[cursor_direction.y + 1][cursor_direction.x + 1];
	}
	
	if(cursor_needed != Cursor::current)
		set_cursor(cursor_needed);
}

void move_sound(ter_num_t ter,short step){
	static bool on_swamp = false;
	eTerSpec spec;
	
	auto const &terrain=univ.get_terrain(ter);
	spec = terrain.special;
	eStepSnd snd = terrain.step_sound;
	
	// if on swamp don't play squish sound : BoE legacy behavior, can be removed safely
	if(snd == eStepSnd::SPLASH && !flying() && univ.party.in_boat < 0){
		if(on_swamp && get_ran(1,1,100) >= 10) return;
		on_swamp = true;
	} else on_swamp = false;
	
	if(!monsters_going && !is_combat() && (univ.party.in_boat >= 0)) {
		if(spec == eTerSpec::TOWN_ENTRANCE)
			return;
		play_sound(48); //play boat sound
	} else if(!monsters_going && !is_combat() && (univ.party.in_horse >= 0)) {
		play_sound(85); //so play horse sound
	} else switch(terrain.step_sound){
		case eStepSnd::SQUISH:
			play_sound(55);
			break;
		case eStepSnd::CRUNCH:
			play_sound(47);
			break;
		case eStepSnd::NONE:
			break;
		case eStepSnd::SPLASH:
			play_sound(17);
			break;
		case eStepSnd::STEP:
			if(step % 2 == 0) //footsteps alternate sound
				play_sound(49);
			else play_sound(50);
	}
}

void incidental_noises(bool on_surface){
	short sound_to_play;
	if(on_surface){
		if(get_ran(1,1,100) < 40){
			sound_to_play = get_ran(1,1,3);
			switch(sound_to_play){
				case 1:
					play_sound(76);
					break;
				case 2:
					play_sound(77);
					break;
				case 3:
					play_sound(91);
					break;
			}
		}
	}else{
		if(get_ran(1,1,100) < 40){
			sound_to_play = get_ran(1,1,2);
			switch(sound_to_play){
				case 1:
					play_sound(78);
					break;
				case 2:
					play_sound(79);
					break;
			}
		}
	}
	// Dog: 80
	// Cat: 81
	// Sheep: 82
	// Cow: 83
	// Chicken: 92
}

void pause(short length) {
	long len;
	
	len = (long) length;
	
	// Before pausing, make sure the screen is updated.
	redraw_screen(REFRESH_NONE);
	
	if(get_bool_pref("DrawTerrainFrills", true))
		sf::sleep(time_in_ticks(len));
}