window.room = (function(){

	var room = function(opt){
		this.id = opt.id || clipper.rooms.length
		this.rect = opt.rect
		this.regions = []

		this.height = opt.height || 200
		this.focused = false
		
		this.$walls = $([])
		this.$floor = $([])
		this.$ceiling = $([])
	}
	
	room.prototype.toString = function(){
		return this.rect.toString()
	}

	room.prototype.reset = function(){
		var copy = this.rect.clone()
		copy.id = this.id
		copy.sides = FRONT | BACK | LEFT | RIGHT
		this.regions = [ copy ]

		this.intersects = []
		this.constructed = false
		
		this.$walls = $([])
		this.$floor = $([])
		this.$ceiling = $([])
	}
	
	room.prototype.bind = function(){
		this.$walls.bind({
			mouseover: function(){
			},
			mousemove: function(e){
			},
			mousedown: function(){
				$(this).css("background-color", choice(window.palettes.colors))
			}
		})
	}

	room.prototype.clipTo = function(r){
		// for each of this rect's regions split the region if necessary
		var regions = this.regions
		var splits
		for (var i = 0, len = regions.length; i < len; i++) {
			if (regions[i] && regions[i].intersects(r)) {
				splits = regions[i].split(r)
				regions = regions.concat(splits)
				regions[i] = null
			}
		}
		this.regions = regions
	}
	
	room.prototype.collides = function(x,y){
		var collision = 0, wall_collision, contains_x, contains_y
		this.regions.forEach(function(r){
			if (! r.sides) return
			
			wall_collision = 0

			if ((r.sides & FRONT) && y < r.y.a) {
				wall_collision |= FRONT
			}
			if ((r.sides & BACK) && r.y.b < y) {
				wall_collision |= BACK
			}
			if ((r.sides & LEFT) && x < r.x.a) {
				wall_collision |= LEFT
			}
			if ((r.sides & RIGHT) && r.x.b < x) {
				wall_collision |= RIGHT
			}
			if (! wall_collision) return

			contains_y = r.y.contains(y)
			contains_x = r.x.contains(x)
			
			if (contains_x) {
				collision |= wall_collision & FRONT_BACK
			}
			else if (contains_y) {
				collision |= wall_collision & LEFT_RIGHT
			}
			else if (bitcount(wall_collision) > 1) {
 				collision |= wall_collision
			}
		})
		return collision
	}

	room.prototype.collidesDisc = function(x,y,radius){
		var collision = 0, wall_collision, contains_x, contains_y
		this.regions.forEach(function(r){
			if (! r.sides) return
			
			wall_collision = 0

			if ((r.sides & FRONT) && y-radius < r.y.a) {
				wall_collision |= FRONT
			}
			if ((r.sides & BACK) && r.y.b < y+radius) {
				wall_collision |= BACK
			}
			if ((r.sides & LEFT) && x-radius < r.x.a) {
				wall_collision |= LEFT
			}
			if ((r.sides & RIGHT) && r.x.b < x+radius) {
				wall_collision |= RIGHT
			}
			if (! wall_collision) return

			contains_x = r.x.contains(x, radius)
			contains_y = r.y.contains(y, radius)

			if (contains_x) {
				collision |= wall_collision & FRONT_BACK
			}
			else if (contains_y) {
				collision |= wall_collision & LEFT_RIGHT
			}
			else if (bitcount(wall_collision) > 1) {
 				collision |= wall_collision
			}
		})
		return collision
	}

	return room

})()