/*
 *
 * VERSIFICATOR 2
 * A keyboardless text adventure engine
 * April 2018
 * Copy and distribute freely, preserving this licence.
 *
 */

var first_person = false;
var box_examine = true;

function I(caps) {
	return first_person ? "I" : (caps ? "You" : "you");
}
function Im(caps) {
	return first_person ? "I'm" : (caps ? "You're" : "you're");
}
function me(caps) {
	return first_person ? (caps ? "Me" : "me") : (caps ? "You" : "you");
}
function my(caps) {
	return first_person ? (caps ? "My" : "my") : (caps ? "Your" : "your");
}
function mine(caps) {
	return first_person ? (caps ? "Mine" : "mine") : (caps ? "Yours" : "yours");
}
function myself(caps) {
	return first_person ? (caps ? "Myself" : "myself") : (caps ? "Yourself" : "yourself");
}
 
function update_display() {
	
	// if using conversifier.js, this is not the update_display() that gets used!
	
	describe_room();
	show_holding();
	show_inventory();
	show_holding();
	show_score();
	
	set_heights();
	//animate_heights();
}

function show_score() {
	document.getElementById('score').innerHTML =
	 '<span id="moves_score">Moves: ' + Game.turn_number + ' Score: </span>' +
	 (Game.dont_show_max_score ? Game.score :
		 (Game.score_percentage ? (Math.round((Game.score / Game.max_score) * 100) + '%') : (Game.score + '/' + Game.max_score))
	 );
}

function get_point_for(gamevar) {
	// give the player a point, then set a variable to true so that they can only get this point once
	if(!Game.vars[gamevar]) {
		Game.vars[gamevar] = true;
		Game.score++;
		return true;
	} else {
		return false;
	}
}

function describe_room() {
	
	var html = '<div class="im_in">';
	
	var lit = is_lit(Game.hero_location);

	if(lit) {
		html += hero_location().description;
	} else {
		html += "It's dark.";
	}
	html += '</div>';
	
	var exitOrder = ['north', 'northeast', 'east', 'southeast',
	                 'south', 'southwest', 'west', 'northwest',
					 'fore', 'aft', 'port', 'starboard',
	                 'up', 'down', 'in', 'out'];
	
	var exits = [];
	exitOrder.forEach(function(dir) {
		if(hero_location().directions[dir]) {
			//exits.push('<a onclick="go(\'' + dir + '\')" href="javascript:void(0);">' + dir + '</a>');
			exits.push(draw_button(dir, "go('" + dir + "')", false, true, true));
		}
		/* else push an unavailable exit marker of same width? */
	});
	
/*	for(var key in hero_location().directions) {
		exits.push('<a onclick="go(\'' + key + '\')" href="javascript:void(0);">' + key + '</a>');
	} */
	if(exits.length) {
		
		html += 'Exits: ' + exits.join(' ') + '<br/>';
	}
	
	if(hero_location().active_verbs && hero_location().active_verbs.length) {
		
		if(hero_location().actions_name) {
			html += hero_location().actions_name + ': ';
		} else {
			html += "Actions: "
		}
		html += list_verbs(Game.hero_location, true) + '<br/>';
	}
	
	/* 	document.getElementById('also_see').innerHTML = html;
	
	
	show_can_also_see();
}

function show_can_also_see() {
	var html = '<br/>';
	var lit = is_lit(Game.hero_location); */
	
	var things_here = [];
	
	// rooms that are e.g. buildings can be listed in with the things if they have the 'enter_from' property
	/* actually this opens a can of worms by allowing a room (not a thing) to be the object of the verb)
	for(var room in Game.rooms) {
		if(Game.rooms[room].enter_from == Game.hero_location) {
			things_here.push(room + ' [<a onClick="do_verb(\'enter\', \'' + room + '\')" href="javascript:void(0)">enter</a>]');
		}
	}
	 */
	
	// alive things come first... 
	for(var key in Game.things) {
		if(Game.things[key].location == Game.hero_location && Game.things[key].is_alive && !Game.things[key].list_last) {
			var this_thing = draw_noun(key) + ' ' + list_verbs(key);
			things_here.push(this_thing);
		}
	}
	
	// ... then non-portable non-alive things
	for(var key in Game.things) {
		if(Game.things[key].location == Game.hero_location && !Game.things[key].is_alive &&
		   !Game.things[key].portable && !Game.things[key].list_last) {
			var this_thing = draw_noun(key) + ' ' + list_verbs(key);
			things_here.push(this_thing);
		}
	}
	// then portable non-alive things
	for(var key in Game.things) {
		if(Game.things[key].location == Game.hero_location && Game.things[key].portable
		   && !Game.things[key].is_alive && !Game.things[key].list_last) {
			var this_thing = draw_noun(key) + ' ' + list_verbs(key);
			things_here.push(this_thing);
		}
	}
	// then anything with list_last
	for(var key in Game.things) {
		if(Game.things[key].location == Game.hero_location && Game.things[key].list_last) {
			var this_thing = draw_noun(key) + ' ' + list_verbs(key);
			things_here.push(this_thing);
		}
	}

	if(lit && things_here.length) {
		html += I(true) + ' can also see:\n<ul>';
		things_here.forEach(function(description) {
			html += '\n<li>' + description + '</li>';
		})
		html += '</ul>\n';
	}
	
	html += '<div class="wait"><button type="button" onClick="do_verb(\'wait\', \'\')">wait</button></div>';
	
	document.getElementById('room_description').innerHTML = html;
	
}

function describe_room_in_scroller() {
	if(Game.suppress_room_message) {
		Game.suppress_room_message = false;
		return;
	}
	
	if(is_lit(Game.hero_location)) {
		
		if(!hero_location().description) {
			console.log("room '" + Game.hero_location + "' has no description");
		}
		
		if(!Game.suppress_room_message) {
			
			
			var txt = hero_location().description;
		
			if(hero_location().directions) {
				var dirs = Object.keys(hero_location().directions);
				if(dirs.length==1) {
					txt += ' An exit leads ' + dirs[0] + '.';
				} else if(dirs.length > 1) {
					txt += ' Exits lead ' + join_with_and(dirs, true) + '.';
				}
			}
			
			if(listobj_in_scroller()) {
				var things = things_here(Game.hero_location);
				if(things != "") {
					txt += (" You can also see " + things + ".");
				}
			}
			say(txt);
/*			var things_here = [];
			
			// same order as in scroller!
			// alive things first
			for(var thing in Game.things) {
				if(Game.things[thing].is_alive && Game.things[thing].location == Game.hero_location && !Game.things[thing].list_last) {
					things_here.push(Game.things[thing].description);
				}
			}
			// then non-portable non-alive things
			for(var thing in Game.things) {
				if(!Game.things[thing].is_alive && !Game.things[thing].portable &&
				   Game.things[thing].location == Game.hero_location && !Game.things[thing].list_last) {
					things_here.push(Game.things[thing].description);
				}
			}
			// then portable non-alive things
			for(var thing in Game.things) {
				if(!Game.things[thing].is_alive && Game.things[thing].portable &&
				   Game.things[thing].location == Game.hero_location && !Game.things[thing].list_last) {
					things_here.push(Game.things[thing].description);
				}
			}
			// then anything with list_last
			for(var thing in Game.things) {
				if(Game.things[thing].list_last && Game.things[thing].location == Game.hero_location) {
					things_here.push(Game.things[thing].description);
				}
			}
			
			if(things_here.length) {
				say(I(true) + " can also see: <ul class=\"room_contents_in_scroller\"><li>" + things_here.join('</li><li>') + '</li></ul>');
			}
		*/
		}
		
	} else {
		say("It's dark.");
	}
};

INV_ICONS = false;

function draw_button(display_text, script, is_examine, is_direction, is_inventory, is_held) {
	// is_examine and is_direction shouldn't both be true
	return '<button type="button" ' + (is_examine? 'class="examine" ' : '') +(is_direction? 'class="direction" ' : '') + 'onClick="' + script + '" ' + (is_held ? 'disabled="disabled" ' : '') + '>' + display_text + '</button>';
}

function draw_noun(thing) {
	
	var desc = Game.things[thing].description;
	
	var img = '';
	if(INV_ICONS && Game.things[thing].icon) {
		img = '<img valign="middle" class="thing_icon" src="res/img/' + Game.things[thing].icon + '" /> '
	}
	
	if(Game.things[thing].status.length) {
		desc += ' (' + Game.things[thing].status.join(', ') + ')';
	}
	
	if(box_examine && !Game.things[thing].no_examine) {
		return draw_button(img + desc, "do_verb('examine','" + thing + "')", true);
	} else {
		return img + desc;
	}
}

function show_holding() {
	var html = '';
	if(Game.held) {
		//var itemHtml = Game.things[Game.held].description + ' ' + list_verbs(Game.held);
		html = Im(true) + " holding:\n<ul><li>" + draw_noun(Game.held) + ' ' + list_verbs(Game.held) + '</li></ul>';
	}
	
	// also show worn things in here
	var worn = [];
	for(var thing in Game.things) {
		if(Game.things[thing].worn) {
			worn.push(draw_noun(thing) + ' ' + list_verbs(thing));
		}
	}
	if(worn.length) {
		if(html) {
			html += '<br />\n'
		}
		html += Im(true) + " wearing:\n<ul><li>" + worn.join('</li>\n<li>') + "</li></ul>";
	}
	
	document.getElementById('holding').innerHTML = html;
}

function show_inventory() {
	var html = Im(true) + " " /* + (Game.held ? "also " : "") */ + "carrying:\n"; //<ul><li>";
	var carried = [];
	Game.inventory.forEach(function(thing) {
		if(/* !held(thing) && */ !Game.things[thing].worn) {
			//var itemHtml = Game.things[thing].description + ' ' + list_verbs(thing);
			/*
			var icon = '';
			if(Game.things[thing].icon) {
				icon = '<img src="res/img/' + Game.things[thing].icon + '" ' + (
					INV_ICONS ? ('alt="' + Game.things[thing].description + '" ' +
							     'title="' + Game.things[thing].description + '" '
								) : ''
					) + 'class="thing_icon" valign="middle" />';
			}
			
			var itemHtml;
			if(INV_ICONS && Game.things[thing].icon) {
				itemHtml = draw_button(icon, 
				"hold('" + thing + "')", false, false, true
				);
			} else {
				// if(icon != '') { icon += ' ' }
				itemHtml = draw_button(icon + Game.things[thing].description, "hold('" + thing + "')", false, false, true);
			} */

			itemHtml = draw_button(Game.things[thing].description +
				(Game.things[thing].status.length ? ' (' + Game.things[thing].status.join(', ') + ')': ''),
			"hold('" + thing + "')",
			false, false, true, held(thing));
			carried.push(itemHtml);
		}
	});
	if(carried.length) {
		html += carried.join(' '); //('</li>\n<li>');
	} else {
		html = ''; // html += 'nothing';
	}
	//html += '</li></ul>';
	
	document.getElementById('inventory').innerHTML = html;
}


function hold(thing) {
	
	if(Game.held) {
		unhold(true);
	}
	
	//removeFrom(Game.inventory, thing);
	if(!carried(thing)) {
		Game.inventory.unshift(thing);
	}
	Game.held = thing;
	do_onholds();
	update_display();
}

function unhold(dont_update) {
	if(!Game.held) {
		return;
	}
	
	//Game.inventory.unshift(Game.held);
	Game.held = '';
	do_onholds();
	if(!dont_update) {
		update_display();
	}
}


function say(txt, dontSmarten) {
	if(GAME_OVER) { return; }
	
	if(typeof txt === 'function') {
		say(txt());
		return;
	}
	
	$('#scroller_content').append('<p><span class="new_message">' + replaceAll((dontSmarten ? txt : smarten(txt)), '\n', '<br/>') + '</span></p>');
	//document.getElementById('scroller').innerHTML += '<br/><span class="new_message">' + replaceAll(txt, '\n', '<br/>') + '</span>';
	
	//document.getElementById('scroller').scrollTop = document.getElementById('scroller').scrollHeight;


		
	// animated scroll
	var scrTop = $('#scroller').prop("scrollHeight");
	$('#scroller').stop().animate({scrollTop: scrTop}, 500);
	
}
function say_if_lit(txt, darktxt) {
	if(is_lit(Game.hero_location)) {
		say(txt);
	} else if(darktxt) {
		say(darktxt);
	}
}
function say_if(cond, txt, txtIfFalse) {
	if(cond) {
		say(txt);
	} else if(txtIfFalse) {
		say(txtIfFalse);
	}
}

function say_where(thing, txt, txtIfFalse) {
	if(in_scope(thing)) {
		say(txt);
	} else if(txtIfFalse) {
		say(txtIfFalse);
	}
}

function sayOne(arr) {
	say(pickOne(arr));
}

function smarten(txt) { // smarten quotes and turn -- to m-dashes

	var ltPos = txt.indexOf('<');
	
	if(ltPos == -1) {
		return smartenThisBit(txt);
	} else {
		var bitBeforeLt = txt.substring(0, ltPos);
		
		var gtPos = txt.indexOf('>');
		
		if(gtPos==-1 || gtPos < ltPos) { // angles don't match so give up
			return txt;
		}
		
		var tag = txt.substring(ltPos, 1 + gtPos);
		
		var bitAfterGt = txt.substring(1+gtPos);
		
		return smartenThisBit(bitBeforeLt) + tag + smarten(bitAfterGt);
	}
}

function smartenThisBit(a)	{
	
	a = a.replace(/(^|[-\u2014\s(\["])'/g, "$1\u2018");       // opening singles
	a = a.replace(/'/g, "\u2019");                            // closing singles & apostrophes
	a = a.replace(/(^|[-\u2014/\[(\u2018\s])"/g, "$1\u201c"); // opening doubles
	a = a.replace(/"/g, "\u201d");                            // closing doubles
	a = a.replace(/--/g, "\u2014");                           // em-dashes
	return a;
};

function dim_old_messages() {
	$('#scroller span.prompt').addClass('old_prompt');
	$('#scroller span.new_message').removeClass('new_message').addClass('old_message');
}

function die(message, deathMessage) {
	say(message);
	if(!deathMessage) { deathMessage = first_person ? "I am dead" : "You are dead"; }
	say("*** " + deathMessage + " ***");
	//say('(<a onclick="restart_game()" href="javascript:void(0)">restart game</a>)');
	//say(draw_button("restart game", "confirm_restart()") +
	//	' <button type="button" onClick="goto_loader()">restore a saved game</button> \
	//	  <button type="button" onClick="undo()">undo</button>', true);
	
	for(var fuse in Game.fuses) {
		stop_fuse(fuse);
	}
	
	$('#room_description').slideUp();
	
	delete_stored_game();
	
	update_display();
	GAME_OVER = true;
	
}

function replaceAll(txt, find, replace) {
	return txt.split(find).join(replace);
}


function add_rule(when, verb, object, func) {
	Rules.push({ when: when, verb: verb, object: object, func: func });
}
function before(verb, object, func) {
	add_rule('before', verb, object, func);
}
function before(verb, object, func) {
	add_rule('after', verb, object, func);
}
function find_rule(when, verb, object) {
	for(var i=0; i<Rules.length; ++i) {
		var rule = Rules[i];
		if(rule.when==when && rule.verb==verb && rule.object==object) {
			return rule;
		}
	}
	return null;
}


current_verb = '';

function go(direction) {

	Game.just_moved = false;
		
	if(GAME_OVER) {
		return;
	}
	
	push_undo_state(direction);
	current_verb = 'go';

	var oldloc = Game.hero_location;

	dim_old_messages();
	say('\n<span class="prompt">&gt; ' + direction + '</span>');
	
	var instead = false;
	
	if(Game.before) {
		Game.before.forEach(function(before) {
			var thisInstead = before('depart');
			if(thisInstead) instead = true;
		});
	}

	if(!instead) {
		if(hero_location().before) {
			if(hero_location().before.depart) {
				instead = hero_location().before.depart(direction);
			}
		}
	}
	
	if(!instead && !GAME_OVER) {
		if(Game.suppress_ok) {
			delete Game.suppress_ok;
		} else {
			say('OK');
		}
		
		Game.hero_location = hero_location().directions[direction];
	}

	var newroom = Game.hero_location;
	if(newroom != oldloc && roomdesc_in_scroller()) {
		describe_room_in_scroller();
	}
	
	if(newroom != oldloc) {
		Game.just_moved = true;
	}
	
	if(!instead) {
		if(Game.rooms[oldloc].after && Game.rooms[oldloc].after.depart) {
			Game.rooms[oldloc].after.depart(direction);
		}
		
		if(hero_location().after && hero_location().after.arrive) {
			hero_location().after.arrive();
		}
	}
	if(!GAME_OVER) {
		do_fuses();
		do_alwayses();
	}

	if(Game.hero_location != newroom && roomdesc_in_scroller()) {
		describe_room_in_scroller();
	}

	//describe_room();
	update_display();
	
	
}

function roomdesc_in_scroller() {
	return $('#roomdesc_always').prop('checked') || ($('#roomdesc_landscape').prop('checked') && is_landscape());
}
function listobj_in_scroller() {
	return $('#listobj_always').prop('checked') || ($('#listobj_landscape').prop('checked') && is_landscape());
}

function verbose() {
	return $('#verbose').prop('checked') 
}


function do_verb(verb, thing, not_a_turn) {
	
	Game.just_moved = false;
	
	if(GAME_OVER) {
		return;
	}
	
	if(!Verbs[verb]) {
		console.log("tried to do nonexistent verb '" + verb + "' (to " + thing + ")");
	}
	
	var phrasing;
	if(Verbs[verb] && Verbs[verb].phrasing) {
		phrasing = Verbs[verb].phrasing(thing);
	} else if(Verbs[verb] && Verbs[verb].intransitive) {
		phrasing = display_verb(verb);
	} else {
		
		phrasing = display_verb(verb);
		
		if(thing && Game.things[thing].preposition && Game.things[thing].preposition[verb]) {
			phrasing += ' ' + Game.things[thing].preposition[verb];
		}
		
		phrasing += ' ' + name(thing);
	}
	
	if(!not_a_turn) {
		// not_a_turn is used e.g. when one command redirects to another
		// (like "fire pistol" to "shoot werewolf" if the werewolf is resent)
		// so undo state isn't pushed and alwayses don't happen (e.g. time doesn't pass) for the "shoot werewolf"
		// - they'll happen for the "fire pistol", which is what the player 'typed'
		dim_old_messages();
		say('\n<span class="prompt">&gt; ' + phrasing + '</span>');
		push_undo_state(phrasing);
		current_verb = verb;
	}
	
	var oldroom = Game.hero_location;
	
	var instead = false;
	
	if(Game.before) {
		Game.before.forEach(function(func) {
			var thisInstead = func(verb, thing);
			if(thisInstead) instead = true;
		});
	}
	
	if(!instead) {
		if(hero_location().before[verb]) {
			instead = hero_location().before[verb](thing);
		}
	}
	
	if(!instead) {
		var rule = find_rule('before', verb, thing);
		if(rule) {
			instead = rule.func();
		} else if(thing && Game.things[thing].before) {
			if(Game.things[thing].before[verb]) {
				instead = Game.things[thing].before[verb]();
			}
		}
	}	
	
	if(!instead) {
		if(Verbs[verb].func) {
			Verbs[verb].func(thing);
		} else {
			say("I don't know how to " + verb + " that."); // shouldn't happen!
		}
	}
	
	var newroom = Game.hero_location
	if(newroom != oldroom && roomdesc_in_scroller()) {
		describe_room_in_scroller();
	}
	
	if(newroom != oldroom) {
		Game.just_moved = true;
	}

	if(!instead) {
		if(hero_location().after) {
			for(var after_verb in hero_location().after) {
				if(after_verb == verb) {
					hero_location().after[after_verb](thing);
				}
			}
		} 
		
		var rule = find_rule('after', verb, thing);
		if(rule) {
			rule.func();
		} else if(thing && Game.things[thing].after) {
			if(Game.things[thing].after[verb]) {
				Game.things[thing].after[verb]();
			}
		}
	}
	
	if(!not_a_turn) {
		do_fuses();
		do_alwayses();
	}
	
	// todo: check other alwayses

	if(Game.hero_location != newroom && roomdesc_in_scroller()) {
		
		describe_room_in_scroller();
	}
	
	update_display();

	if(!GAME_OVER) {
		autosave_game();
	}
}

function do_alwayses() {
	if(!GAME_OVER) {
		autosave_game();
	}
	
	if(Game.always) {
		for(var func in Game.always) {
			Game.always[func]();
		}
	}	

	if(hero_location().always) {
		hero_location().always();
	};
	
	for(var thing in Game.things) {
		if(in_scope(thing) && Game.things[thing].always) {
			// console.log('doing always for ' + thing);
			Game.things[thing].always();
		}
	}
	
	for(var thing in Game.things) {
		if(Game.things[thing].active_when_carried) {
			Game.things[thing].active_when_carried.forEach(function(verb) {
				set_active(thing, verb, carried(thing));
			});
		}
	}

	do_onholds();
}

function do_onholds() {
	On_hold.forEach(function(onhold) {
		onhold();
	});
}

function constantly(func) {
	On_hold.push(func);
	Game.always.push(func);
}

function do_fuses() {
	for(var fuse in Game.fuses) {
		if(Game.fuses[fuse].time > 0) {
			Game.fuses[fuse].time = Game.fuses[fuse].time - 1;
//			console.log(fuse + ' fires in ' + Game.fuses[fuse].time);
		}
		var time = Game.fuses[fuse].time;
		if (time == 0) {
			// fuses don't need to have an explode, or a burn
			if(Game.fuses[fuse].explode) {
				Game.fuses[fuse].time = -1;
				Game.fuses[fuse].explode();
			}
		} else if(time > 0 && Game.fuses[fuse].burn) {
			Game.fuses[fuse].burn();
		}
			
	}
}

function set_fuse(fuse, time) {
	//console.log("setting fuse '" + fuse + "' to " + time);
	if(!Game.fuses[fuse]) {
		Game.fuses[fuse] = {};
	}
	Game.fuses[fuse].time = time;
}

function stop_fuse(fuse) {
	//console.log('stopping fuse "' + fuse + '"');
	if(Game.fuses[fuse]) {
		Game.fuses[fuse].time = -1; // doesn't explode
	}
}

function explode_fuse(fuse) {
	Game.fuses[fuse].time = 0;
	Game.fuses[fuse].explode();
}

function list_verbs(thing, is_room) {
	
	var things_or_rooms = is_room ? 'rooms' : 'things';
	
	var snippets = [];
	
	for(var verb in Verbs) {
		//console.log('looking at ' + verb + ' for ' + things_or_rooms + '.' + thing)
		if(Game[things_or_rooms][thing].active_verbs.indexOf(verb) != -1) {
			// snippets.push('<a onClick="do_verb(\'' + verb + '\',\'' + thing + '\')" href="javascript:void(0)">' + display_verb(verb) + '</a>');
			snippets.push(draw_button(display_verb(verb), "do_verb('" + verb + "','" + thing + "')"));
		}
	}
	
	// allow things to have active_verbs that don't appear in Verbs
	// (in this case the thing MUST catch the verb with a 'before', and return true)
	//console.log('Game[things_or_rooms][thing].active_verbs : things_or_rooms is ' + things_or_rooms + '; thing is ' + thing);
	//console.log(things_or_rooms + ': ' + thing);
	
	Game[things_or_rooms][thing].active_verbs.forEach(function(verb) {
		// n.b. if there's an error here, a thing was probably given active_verbs: "foo" instead of active_verbs: ["foo"]
		if(!Verbs[verb]) {
			// snippets.push('<a onClick="do_verb(\'' + verb + '\',\'' + thing + '\')" href="javascript:void(0)">' + display_verb(verb) + '</a>');
			snippets.push(draw_button(display_verb(verb), "do_verb('" + verb + "','" + thing + "')"));
		}
	});
	
	
	if(snippets.length) {
		return snippets.join(' ');
	} else return '';
	
}

function display_verb(verb) {
	if(Verbs[verb] && Verbs[verb].display) {
		return Verbs[verb].display;
	} else {
		return verb;
	}
}

function activate_verb(thing, verb) {
	// console.log('activating ' + verb + ' for ' + thing);

	if(!Game.things[thing].active_verbs) {
		Game.things[thing].active_verbs = [];
	}
	if(Game.things[thing].active_verbs.indexOf(verb) == -1) {
		Game.things[thing].active_verbs.push(verb);
	}

}
function has_active_verb(thing, verb) {
	return Game.things[thing].active_verbs.indexOf(verb) != -1;
};

function activate_room_verb(room, verb) {
	//console.log('activating ' + verb + ' for room ' + room);
	
	if(!Game.rooms[room].active_verbs) {
		Game.rooms[room].active_verbs = [];
	}
	if(Game.rooms[room].active_verbs.indexOf(verb) == -1) {
		Game.rooms[room].active_verbs.push(verb);
	}

}

function deactivate_verb(thing, verb) {
	//console.log('deactivating ' + verb + ' for ' + thing);
	if(!Game.things[thing]) {
		console.log('tried to deactivate "' + verb + '" for nonexistent thing "' + thing + '"');
	}
	removeFrom(Game.things[thing].active_verbs, verb);
}

function deactivate_room_verb(room, verb) {
	//console.log('deactivating ' + verb + ' for room ' + room);
						
	removeFrom(Game.rooms[room].active_verbs, verb);
}

function deactivate_all(thing) {
	//console.log('deactivating all verbs for ' + thing);
	Game.things[thing].active_verbs = [];
}

function set_active(thing, verb, bool) {
	if(bool) {
		activate_verb(thing, verb);
	} else {
		deactivate_verb(thing, verb);
	}
}

function activate_if_held(thing, verb, tool) {
	if(held(tool)) {
		activate_verb(thing, verb);
	} else {
		deactivate_verb(thing, verb);
	}
}

function removeFrom(array, item) {
	for(var i=array.length - 1; i >= 0; --i) {
		if(array[i]==item) {
			array.splice(i, 1);
		}
	}
}

var INITIAL_GAME = {};
var PLAYED = false;
var GAME_OVER = false;

function initialise() {
	if(!PLAYED) {
		INITIAL_GAME = JSONfn.stringify(Game);
		PLAYED = true;
	}
	
	document.title = Game.title;
	document.getElementById('title').innerHTML = Game.title;
	
	if(Game.initialise) {
		Game.initialise();
	}
	
	for(var thing in Game.things) {
		if(typeof Game.things[thing].active_verbs === 'undefined') {
			Game.things[thing].active_verbs = [];
		}
		
		if(typeof Game.things[thing].active_when_carried === 'undefined') {
			Game.things[thing].active_when_carried = [];
		}
		
		if(typeof Game.things[thing].status === 'undefined') {
			Game.things[thing].status = [];
		}
		
		if(typeof Game.things[thing].active_verbs === 'string') {
			console.log('Watch out - Game.things.' + thing + '.active_verbs is a string!');
		}
		
		if(typeof Game.things[thing].status === 'string') {
			console.log('Watch out - Game.things.' + thing + '.status is a string!');
		}
		
		if(Game.things[thing].portable) {
			set_active(thing, 'take', !carried(thing));
			set_active(thing, 'drop', carried(thing));
		}
		
		
		if(Game.things[thing].active_when_carried) {
			Game.things[thing].active_when_carried.forEach(function(verb) {
				set_active(thing, verb, carried(thing));
			});
		}
		
		if(!Game.things[thing].description) {
			Game.things[thing].description = replaceAll(thing, '_', ' ');
		}

		
		if(Game.things[thing].initialise) {
			Game.things[thing].initialise();
		}
	}
	
	for(var room in Game.rooms) {
		if(typeof Game.rooms[room].directions === 'undefined') {
			Game.rooms[room].directions = {};
		}
		
		if(typeof Game.rooms[room].before === 'undefined') {
			Game.rooms[room].before = {};
		}
		if(typeof Game.rooms[room].after === 'undefined') {
			Game.rooms[room].after = {};
		}
		
		if(Game.rooms[room].initialise) {
			Game.rooms[room].initialise();
		}
	}
	
	say(Game.intro);
	
	if(is_landscape()) {
		say("<u>" + Game.title.toUpperCase() + (Game.author ? ", by " + Game.author + "</u>" : ""));
	}
	//say('For instructions, touch: <a href="javascript:void(0)" onClick="instructions()">instructions</a>\n');
	say("For instructions, click: <button class=\"instructions\" onClick=\"instructions();\">instructions</button>\n", true);
	
	restore_checkboxes();
	if(roomdesc_in_scroller()) {
		describe_room_in_scroller();
	}
	
	set_heights();
	
	
	
	//do_alwayses();

}

function confirm_restart() {
	if(GAME_OVER || confirm("Really restart this story?")) {
		restart_game();
	}
}

function restart_game() {
	$('#room_description').slideDown();
	GAME_OVER = false;
	Game = JSONfn.parse(INITIAL_GAME);
	document.getElementById('scroller_content').innerHTML = '';
	initialise();
	//describe_room();
	update_display();
	set_heights();
}



function is_lit(room) {
	
	if(!Game.rooms[room]) {
		console.log("tried to check lit status of nonexistent room '" + room + "'");
	}
	
	if(Game.hero_blind) {
		return false;
	}
	
	if(!Game.rooms[room].dark) {
		return true;
	}
	
	for(var thing in Game.things) {
		if(Game.things[thing].is_lit && (
		    (Game.things[thing].location == room) ||
		    (Game.hero_location == room && carried(thing))
		   )
		  ) {
			  return true;
		}
	}

	return false;
}

function uncarry(thing) {
	if(held(thing)) {
		unhold(true);
	}
	if(Game.things[thing].wearable) {
		deactivate_verb(thing, 'wear');
		deactivate_verb(thing, 'remove');
		Game.things[thing].worn = false;
	}
	removeFrom(Game.inventory, thing);
}

function give_hero(thing, sneak) { // if SNEAK is true, put the thing in the inventory, not the PC's hands (i.e. carrying not held)
	if(!carried(thing)) {
		
		if(sneak) {
			Game.inventory.unshift(thing);
		} else {
			hold(thing);
		}
	}
	Game.things[thing].location = '';
	activate_verb(thing, 'drop');
	deactivate_verb(thing, 'take');
	if(Game.things[thing].wearable) {
		activate_verb(thing, 'wear');
	}
}

function take_away(thing) {
	uncarry(thing);
	Game.things[thing].location = '';
	deactivate_verb(thing, 'drop');
	if(Game.things[thing].portable) {
		activate_verb(thing, 'take');
	}
}

function put(thing, location) {
	
	//console.log('putting ' + thing + ' in ' + (location ? location : '(nowhere)' ));
	
	if(!Game.things[thing]) {
		console.log("Tried to put nonexistent thing '" + thing + "' in " + location);
	}
	if(!Game.rooms[location] && location != '') {
		console.log("Tried to put " + thing + " in nonexistent room '" + location + "'");
	}
	
	take_away(thing);
	Game.things[thing].location = location;
	if(Game.things[thing].wearable) {
		deactivate_verb(thing, 'wear');
		deactivate_verb(thing, 'remove');
		Game.things[thing].worn = false;
	}
	deactivate_verb(thing, 'drop');
	if(Game.things[thing].portable) {
		activate_verb(thing, 'take');
	}
}
function bring(thing) {
	put(thing, Game.hero_location);
}

function hide(thing) {
	put(thing, '');
}

function add_status(thing, status) {
	if(Game.things[thing].status.indexOf(status)==-1) {
		Game.things[thing].status.push(status);
	}
	update_display();
}
function remove_status(thing, status) {
	var i = Game.things[thing].status.indexOf(status);
	if(i==-1) {
		return false;
	}
	
	Game.things[thing].status.splice(i);
	return true;
}
function clear_status(thing) {
	Game.things[thing].status = [];
	update_display();
}
function has_status(thing, status) {
	if(!Game.things[thing]) {
		console.log('tried to get status of nonexistent thing "' + thing + '"??');
	}
	return Game.things[thing].status.indexOf(status) != -1;
}

function name(thing) {
	//return thing;
	if(!thing) { return '' };
	
	if(!Game.things[thing]) {
		console.log("tried to get name of nonexistent thing '" + thing + "'");
	}
	
	if(Game.things[thing].name) {
		return Game.things[thing].name;
	} else {
		return replaceAll(thing, '_', ' ');
	}
}

function singular(thing) {
	if(Game.things[thing].singular) {
		return Game.things[thing].singular;
	} else {
		return name(thing);
	}
}

function the_thing(thing, caps) {
	if(!Game.things[thing]) {
		console.log("Tried to call the_thing() for nonexistent thing '" + thing + "'");
	}
	if(Game.things[thing].proper_name) {
		return capitalise(name(thing));
	} else {
		return (caps ? "The " : "the ") + name(thing);
	}
}

function capitalise(str) {
	if(str == '') {
		return ''
	} else {
		return str.substring(0,1).toUpperCase() + str.substring(1);
	}
}

function location_of(thing) {
	if(!Game.things[thing]) {
		console.log("tried to get location of nonexistent thing '" + thing + "'");
	}
	return Game.things[thing].location;
}

function hero_location() {
	if(!Game.rooms[Game.hero_location]) {
		console.log("hero is in nonexistent location '" + Game.hero_location + "'");
	}
	return Game.rooms[Game.hero_location];
}

function at(room) {
	return Game.hero_location == room;
}

function put_hero(room, suppress_message) {
	if(!Game.rooms[room]) {
		console.log('tried to put hero at nonexistent location "' + room + '"');
	} else {
		//console.log('putting hero at ' + room);
	}
	Game.hero_location = room;
	if(suppress_message) {
		Game.suppress_room_message = true;
	}
}

function held(thing) {
	return Game.held == thing;
}

function a_thing(thing) {
	if(!Game.things[thing]) {
		console.log('tried to get indefinite form of nonexistent thing "' + thing + '"???');
		return 'a strange object';
	}
	var desc = Game.things[thing].description; // not name!
	if(Game.things[thing].indefinite) {
		return Game.things[thing].indefinite;
	} else if(Game.things[thing].proper_name) {
		return desc;
	} else if(Game.things[thing].is_plural) {
		return 'some ' + desc;
	} else if('aeiou'.indexOf(desc.charAt(0).toLowerCase())!=-1) {
		return 'an ' + desc;
	} else {
		return 'a ' + desc;
	}
}

function things_here(room) {
	var things = [];
	for(var i in Game.things) {
		if(Game.things[i].is_alive && !Game.things[i].list_last && location_of(i)==room && !Game.things[i].dont_list_in_scroller) {
			things.push(a_thing(i));
		}
	}
	for(var i in Game.things) {
		if(!Game.things[i].is_alive && !Game.things[i].portable && !Game.things[i].list_last && location_of(i)==room && !Game.things[i].dont_list_in_scroller) {
			things.push(a_thing(i));
		}
	}
	for(var i in Game.things) {
		if(!Game.things[i].is_alive && Game.things[i].portable && !Game.things[i].list_last && location_of(i)==room && !Game.things[i].dont_list_in_scroller) {
			things.push(a_thing(i));
		}
	}
	for(var i in Game.things) {
		if(Game.things[i].list_last && location_of(i)==room && !Game.things[i].dont_list_in_scroller) {
			things.push(a_thing(i));
		}
	}
	return join_with_and(things);
}

function held_thing() {
	return Game.things[Game.held];
}

function carried(thing) {
	if(!Game.things[thing]) {
		console.log("Tried to check carried status of nonexistent thing '" + thing + "'");
	}
	return (Game.held == thing) || Game.inventory.indexOf(thing) != -1;
}

function worn(thing) {
	if(!Game.things[thing]) {
		console.log("Tried to check worn status of nonexistent thing '" + thing + "'");
	}
	return Game.things[thing].worn;
}

function in_scope(thing) {
	return carried(thing) || Game.things[thing].location == Game.hero_location;
}

function visible(thing) {
	return carried(thing) || (Game.things[thing].location == Game.hero_location && is_lit(Game.hero_location));
}

function pronoun(thing, n, caps) {
	var pronoun = '';
	if(Game.things[thing].pronouns) {
		pronoun = Game.things[thing].pronouns[n];
	} else if(Game.things[thing].is_plural) {
		pronoun = ["they", "them", "their", "theirs"][n];
	} else {
		pronoun = ["it", "it", "its", "its"][n];
	}
	return caps ? capitalise(pronoun) : pronoun;
}

function s(thing) {
	if(Game.things[thing].is_plural) {
		return "";
	} else {
		return "s";
	}
}

function pick(n) { // random number 0 to n-1
	return Math.floor(n * Math.random());
}

function pickOne(arr) { // random element of an array
	if(typeof arr == 'string') {
		console.error("watch out - pickOne was called with a string argument!");
	}
	return arr[pick(arr.length)];
}



/*
 * Undo
 */


Undo_states = [];
Undo_states.length = 20; // number of UNDO states to keep in memory
clear_undo_stack();
function clear_undo_stack() {
	for(var i=0; i < Undo_states.length; ++i) {
		Undo_states[i] = '';
	}
}
function push_undo_state(command)
{
	for(var i = Undo_states.length - 1; i > 0; --i)
		Undo_states[i] = Undo_states[i - 1];
	
	Game.undo_message = command;
	Undo_states[0] = JSONfn.stringify(Game);
	
	autosave_game();
}
function pop_undo_state()
{
	var old_state = Undo_states[0];
	for(var i = 0; i < Undo_states.length - 1; ++i) {
		Undo_states[i] = Undo_states[i + 1];
	}
	Undo_states[Undo_states.length - 1] = '';
	
	return old_state;
}
function undo() {
	$('#room_description').slideDown();
	
	say('\n<span class="prompt">&gt; undo</span>');

	var popped_state = pop_undo_state();
	
	if(popped_state == '') {
		say("Can't undo, sorry");
		return;
	}
	
	GAME_OVER = false;
	
	Game = JSONfn.parse(popped_state);
	autosave_game();
	do_onholds();
	update_display();
	say('Undone "' + Game.undo_message + '"');
	
}



/*
 *  Load and save games
 */

function save_game() {
	
	if(GAME_OVER) {
		// document.getElementById('scroller').innerHTML += ("<br/>You can't save, because the game is over<br/>\
		//     Try undoing, restoring or restarting");
		return;     
	}
	
	var game_name = prompt("Enter a name for your saved game", Game.title);
	
	if(!game_name) {
		say("\n<span class=\"prompt\">&gt; save</span>\nCancelled");
		return;
	}
	store_game(game_name)
}
function store_game(game_name, suppress_message) {
	game_name = game_name.toUpperCase();
	game_name = game_name.split("'").join("");
	game_name = game_name.split('"').join("");
	game_name = game_name.split('\n').join("");
	game_name = game_name.split('\r').join("");
	game_name = game_name.split('\t').join("");
	game_name = game_name.split('\\').join("");
	
	if((!suppress_message && game_name=='AUTOSAVE') || !game_name.split(" ").join("")) { // spaces are allowed, but not ONLY spaces
		say_if(!suppress_message, "Game not saved. Please use a more sensible name.");
		return;
	}
		
	say_if(!suppress_message, '\n<span class="prompt">&gt; save ' + game_name + '</span>');
	
	Game.timestamp = new Date().getTime();
	// FUTURE SELF: watch out for continuing autosaved games from before an update that broke savefiles. You're welcome!
	
	try {
		localStorage.setItem(Game.id + '_' + game_name, JSONfn.stringify(Game));
		say_if(!suppress_message, "Game saved as '" + game_name + "'");
	} catch(e) {
		say_if(!suppress_message, "Couldn't save game, sorry");
		if(suppress_message) { console.log('couldn\'t autosave'); }
	}
	
}

function load_game(game_name, suppress_message) {
	say_if(!suppress_message, '\n<span class="prompt">&gt; restore</span>');

	GAME_OVER = false;
	Game = JSONfn.parse(localStorage.getItem(Game.id + '_' + game_name));
	$('#saved_games').fadeOut();
	$('#room_description').html('');
	say_if(!suppress_message, "Game restored from '" + game_name + "'");
	clear_undo_stack();
	do_onholds();
	
	if(suppress_message) {
		$('#scroller_content').html('');
		say('Game restored from previous session.\n&nbsp;');
	}
	
	describe_room_in_scroller();
	update_display();
}

function delete_game(game_name, suppress_message) {
	if(suppress_message || confirm("Really delete game '" + game_name + "'?")) {
		localStorage.removeItem(Game.id + '_' + game_name);
		$('#saved_games').fadeOut();
		say_if(!suppress_message, '\n<span class="prompt">&gt; delete ' + game_name + '</span>');
		say_if(!suppress_message, "Saved game '" + game_name + "' deleted");
	}
}

function continue_game() {
	load_game('AUTOSAVE', true);
}
function autosave_game() {
	//say('autosaved');
	store_game('AUTOSAVE', true);
	//console.log('autosaved game');
}
function delete_stored_game() {
	delete_game('AUTOSAVE', true);
}


function goto_loader() {
	$('#room_description').slideDown();
	var html = 'Restore saved game<br/><br/>';
	
	var i=0;
	for(var key in localStorage) {
		
		if(key.indexOf(Game.id + '_')==0) {
			++i;
			
			game_name = key.substring(1 + Game.id.length);
			
			if(game_name != 'AUTOSAVE') {
			
				// html += '<a onClick="load_game(\'' + game_name + '\')" href="javascript:void(0)">' + game_name + '</a> ' +
				//  '[<a onClick="delete_game(\'' + game_name + '\')" href="javascript:void(0)">delete</a>]<br/>';
				html += draw_button(game_name, "load_game('" + game_name + "')") +
						draw_button("delete", "delete_game('" + game_name + "')") + "<br/>\n";
			}
		}
	}
	if(!i) {
		html += 'No saved games found.<br/>';
	}
		
	//html += '<br/>[<a onClick="remove_loader()" href="javascript:void(0)">cancel</a>]';
	html += "<br/>" + draw_button("cancel", "remove_loader()");
	
	$('#saved_games').html(html);
	$('#saved_games').fadeIn();
	
}

function remove_loader() {
	$('#saved_games').fadeOut();
}


/*
 * JSONfn utility
 * allows an object structure including functions to be stringified/parsed like JSON
 * (so that the whole Game object can be stashed in local storage/undo history)
 */
var JSONfn;
if (!JSONfn) {
    JSONfn = {};
}

(function () {
  JSONfn.stringify = function(obj) {
    return JSON.stringify(obj,function(key, value){
            return (typeof value === 'function' ) ? value.toString() : value;
        });
  }

  JSONfn.parse = function(str) {
    return JSON.parse(str,function(key, value){
        if(typeof value != 'string') return value;
        return ( value.substring(0,8) == 'function') ? eval('('+value+')') : value;
    });
  }
}());


/*
 * display options
 */

function show_options() {
	$('#options').fadeIn();
}
function hide_options() {
	$('#options').fadeOut();
}

function show_credits() {
	$('#credits').fadeIn();
}
function hide_credits() {
	$('#credits').fadeOut();
}


$(document).ready(function() {
	
	$('#listobj_always').change(function() {
		var checked = $('#listobj_always').prop('checked');
		$('#listobj_landscape').prop('checked', !checked);
		$('#listobj_never').prop('checked', !checked);
		if(checked) {
			localStorage.setItem(Game.id + 'options_listobj', 'always');
		}
		if(checked && !$('#roomdesc_always').prop('checked')) {
			$('#roomdesc_always').prop('checked', true);
			$('#roomdesc_always').trigger('change');
		}
	});
	$('#listobj_landscape').change(function() {
		var checked = $('#listobj_landscape').prop('checked');
		$('#listobj_always').prop('checked', !checked);
		$('#listobj_never').prop('checked', !checked);
		if(checked) {
			localStorage.setItem(Game.id + 'options_listobj', 'landscape');
		}
		if(checked && $('#roomdesc_never').prop('checked')) {
			$('#roomdesc_landscape').prop('checked', true);
			$('#roomdesc_landscape').trigger('change');
		}
	});
	$('#listobj_never').change(function() {
		var checked = $('#listobj_never').prop('checked');
		$('#listobj_landscape').prop('checked', !checked);
		$('#listobj_always').prop('checked', !checked);
		if(checked) {
			localStorage.setItem(Game.id + 'options_listobj', 'never');
		}
	});
	$('#roomdesc_always').change(function() {
		var checked = $('#roomdesc_always').prop('checked');
		$('#roomdesc_landscape').prop('checked', !checked);
		$('#roomdesc_never').prop('checked', !checked);
		if(checked) {
			localStorage.setItem(Game.id + 'options_roomdesc', 'always');
		}
	});
	$('#roomdesc_landscape').change(function() {
		var checked = $('#roomdesc_landscape').prop('checked');
		$('#roomdesc_always').prop('checked', !checked);
		$('#roomdesc_never').prop('checked', !checked);
		if(checked) {
			localStorage.setItem(Game.id + 'options_roomdesc', 'landscape');
		}
		if(checked && $('#listobj_always').prop('checked')) {
			$('#listobj_landscape').prop('checked', true);
			$('#listobj_landscape').trigger('change');
		}
	});
	$('#roomdesc_never').change(function() {
		var checked = $('#roomdesc_never').prop('checked');
		$('#roomdesc_landscape').prop('checked', !checked);
		$('#roomdesc_always').prop('checked', !checked);
		if(checked) {
			localStorage.setItem(Game.id + 'options_roomdesc', 'never');
		}
		if(checked && !$('#listobj_never').prop('checked')) {
			$('#listobj_never').prop('checked', true);
			$('#listobj_never').trigger('change');
		}
	});
	
	$('#verbose').change(function() {
		var checked = $('#verbose').prop('checked');
		$('#noverbose').prop('checked', !checked);
		localStorage.setItem(Game.id + 'option_verbose', checked?1:0);
	});
	$('#noverbose').change(function() {
		var checked = $('#noverbose').prop('checked');
		$('#verbose').prop('checked', !checked);
		localStorage.setItem(Game.id + 'option_verbose', checked?0:1);
	});
	
	$('#plain_colours').change(function() {
		var checked = $('#plain_colours').prop('checked');
		localStorage.setItem(Game.id + 'option_plain_colours', checked?0:1);
		set_plain_colours(checked);
	});

});


function change_font_size(n) { // if n==1, make bigger; if n==-1, make smaller; if n==0, reset
	var min_size = 10;
	var default_size = 12;
	
	var set_to = default_size;
	
	if(n != 0) {
		var font_size_px = parseFloat( $('body').css('font-size') );
		var font_size_pt = Math.round( font_size_px * (72/96) );
		set_to = font_size_pt + n;
	}
	
	$('body').css('font-size', set_to + 'pt');
	
	localStorage.setItem(Game.id + 'options_fontsize', set_to);
	
	update_display();
}

BLACK_AND_WHITE = {
	color: '#000000',
	'background-color': '#ffffff',
};
NOT_PLAIN = {
	color: '',
	'background-color': '',
}
function set_plain_colours(plainp) {
	/*
	 * DEFERRED
	 *
	if(plainp) {
		//$('body').css(BLACK_AND_WHITE);
		$('#scroller').css(BLACK_AND_WHITE);
		$('#room_description').css(BLACK_AND_WHITE);
		$('#inventory').css(BLACK_AND_WHITE);
		$('#holding').css(BLACK_AND_WHITE);
		$('#options').css(BLACK_AND_WHITE);
	} else {
		$('#scroller').css(NOT_PLAIN);
		$('#room_description').css(NOT_PLAIN);
		$('#inventory').css(NOT_PLAIN);
		$('#holding').css(NOT_PLAIN);
		$('#options').css(NOT_PLAIN);
	}
	 *
	 */
}

function change_font() {
	var font = $('#font_select').val();
	$('body').css('font-family', font + ', ' + font + '_ie');
	
	localStorage.setItem(Game.id + 'options_font', font);
	
	update_display();
}

function restore_display_options() {
	
	try {
		
		var font = localStorage.getItem(Game.id + 'options_font');
		var size = localStorage.getItem(Game.id + 'options_fontsize');
		
		$('body').css({
			'font-family': font + ', ' + font + '_ie',
			'font-size': size + 'pt'
		});
		
		//$('#font_select option[value="' + font + '"]').prop('selected', 'selected')
		
		$('#font_select').val(font);
		// StackOverflow insists that works, but it's not working for me on all browsers, so:
		$('#font_select option[val="' + font + '"]').attr('selected', 'selected');	
		
		update_display();
	} catch(e) {
	}
}
$(document).ready(function() {
	
	try {
		if(localStorage.getItem(Game.id + 'options_font')) {
			restore_display_options();
		}
	} catch(e) {
		// localStorage not working
		
		say("\nCould not access local storage. Saving and restoring games may not work.");
		$('body').css({ 'font-family' : 'typewriter', 'font-size' : '12pt' });
		// could not restore settings
	
	}
		
	restore_checkboxes();
});

function restore_checkboxes() {
	try {
		var listobj = localStorage.getItem(Game.id + 'options_listobj');
		if(listobj=='always') {
			$('#listobj_always').prop('checked', true);
			$('#listobj_always').trigger('change');
		} else if(listobj == 'landscape') {
			$('#listobj_landscape').prop('checked', true);
			$('#listobj_landscape').trigger('change');
		} else if(listobj == 'never') {
			$('#listobj_never').prop('checked', true);
			$('#listobj_never').trigger('change');
		}
		var roomdesc = localStorage.getItem(Game.id + 'options_roomdesc');
		if(roomdesc=='always') {
			$('#roomdesc_always').prop('checked', true);
			$('#roomdesc_always').trigger('change');
		} else if(roomdesc == 'landscape') {
			$('#roomdesc_landscape').prop('checked', true);
			$('#roomdesc_landscape').trigger('change');
		} else if(roomdesc == 'never') {
			$('#roomdesc_never').prop('checked', true);
			$('#roomdesc_never').trigger('change');
		}

		var verbose = localStorage.getItem(Game.id + 'option_verbose')=='1';
		$('#verbose').prop('checked', verbose);
		$('#noverbose').prop('checked', !verbose);

		var use_plain = localStorage.getItem(Game.id + 'option_plain_colours');
		if(use_plain) {
			$('#plain_colours').prop('checked', use_plain);
			$('#plain_colours').trigger('change');
		}
		

	} catch(e) {
		// could not restore settings
	}

}

// detect if landscape
function is_landscape() {
	return (window.innerWidth >= window.innerHeight); // >? >=?
	//return (window.innerWidth >= 800);
}


var room_description_height = $('#room_description').height();
var inventory_height = $('#inventory').height();

function animate_heights() {
	animate_room_description_height();
	animate_holding_height();
	animate_inventory_height();
}

function animate_inventory_height() {
	$('#inventory_container').stop().animate({height: $('#inventory').outerHeight()}, 300);
	set_heights();
}
function animate_holding_height() {
	$('#holding_container').stop().animate({height: $('#holding').outerHeight()}, 300);
}
function animate_room_description_height() {
	$('#room_description_container').stop().animate({height: $('#room_description').outerHeight()}, 300);
}

function set_heights() { // no animation
	$('#room_description_container').height($('#room_description').outerHeight());
	$('#holding_container').height($('#holding').outerHeight());
	$('#inventory_container').height($('#inventory').outerHeight());
}

/*
 * User instructions
 */
function instructions() {
	dim_old_messages();
	say('\n<span class="prompt">&gt; instructions</span>');
	say("This is a keyboardless text adventure game. You are taking part in an interactive story - \
	    I will tell you what is going on in this pane. In the pane below, I'll tell you " + (
			first_person ? "where I am, what I can see, and what I\'m carrying." :
				"where you are, what you can see, and what you're carrying."
		) + " To give me an instruction, \
	    click or touch one of the <button type=\"button\">buttons</button> there &ndash; either a direction telling \
	    me where to go, or an action applying to something " + I() + " can see. Click on the name of an item in a \
		<button class=\"examine\">square-cornered button</button> to examine the item for a longer description. \
		Click an item in the \"" + Im(true) + " carrying\" list to hold that item, \
		which may make more actions available. Have fun, and happy adventuring!", true);
}

/* set_heights() doesn't work at first, I don't know why! 
 */
$(document).ready(function() {
	setTimeout(set_heights, 200);
});



function join_with_and(words, noOxfordComma) {
	if(!words.length) {
		return '';
	}
	
	if(words.length == 1) {
		return words[0];
	}
	
	if(words.length == 2) {
		return words[0] + (!noOxfordComma ? ',' : '') + ' and ' + words[1];
	}
	
	return words[0] + ', ' + join_with_and(words.slice(1), noOxfordComma);
}


$(document).ready(function() {
	//setTimeout(animate_heights, 500);
	//setInterval(set_heights, 10000);
	if(localStorage && localStorage[Game.id + "_AUTOSAVE"]) {
		$('#continue_button').removeAttr('disabled');
	} else {
		$('#continue_button').attr('disabled', 'disabled');
	}
	//$('#continue_button').prop('disabled', !localStorage[Game.id + "currentgame"]);
});