local gen= {}

function gen:new(game,x,y,color,grid)

	local Circle = game.objects.base:new(game,x,y,grid.cellsize,grid.cellsize)
	Circle.cellsize = grid.cellsize
	Circle.grid = grid
	Circle.color = color
	Circle.shadowsprite = game:newImage("circles/shadow.png")
	Circle.sprites = {game:newImage("circles/regular/"..color..".png"),game:newImage("circles/selected/"..color..".png")}
	Circle:register("Circle")
	Circle:register(color)
	Circle.selected = false

	function Circle:step(dt) end

	function Circle:draw()
		local spriteindex = 1
		if self.selected then spriteindex = 2 end
		lg.draw(self.sprites[spriteindex],self.rect[1]-self.game.camerax-self.spriteoffx,self.rect[2]-self.game.cameray-self.spriteoffy)
		if self.selected then
			local i
			for i=1,#self.moves do
				lg.draw(self.shadowsprite,self.moves[i][1]-self.game.camerax-self.spriteoffx,self.moves[i][2]-self.game.cameray-self.spriteoffy)
			end
		end
	end

	function Circle:MouseCallback(x,y,presses)
		if self.rect:collidepoint(x,y) then
			local c = self.game:findName("Circle")
			local i
			for i=1,#c do
				if c[i]~=self then c[i].selected = false end
			end
			self.selected = not self.selected
			self.depth = 1
			if self.selected then
				self.moves = self:findAvailableMoves()
				self.depth = 2
			end
		end
		if self.selected then
			local i
			for i=1,#self.moves do
				rect = self.game.rect:new(self.moves[i][1],self.moves[i][2],self.cellsize,self.cellsize)
				if rect:collidepoint(x,y) then
					self.rect:move_ip(self.moves[i][1],self.moves[i][2])
					self.selected = false
					break
				end
			end
		end
	end

	function Circle:findAvailableMoves()
		local moves = {}
		local movx
		local movy
		local offx
		local offy
		obj = self.game:findName("Circle")

		function ValidMove(x,y)
			local i
			x = self.rect.x+x+self.cellsize/2
			y = self.rect.y+y+self.cellsize/2
			local result = self.grid.rect:collidepoint(x,y)
			for i=1,#obj do
				if obj[i].rect:collidepoint(x,y) then
					result = false
				end
			end
			return result
		end

		for movx=-1,1 do
			for movy=-1,1 do
				if not (movx==0 and movy==0) then
					offx = movx*self.cellsize
					offy = movy*self.cellsize
					while ValidMove(offx+movx*self.cellsize,offy+movy*self.cellsize) do
						offx = offx + movx*self.cellsize
						offy = offy + movy*self.cellsize
					end
					if ValidMove(offx,offy) then
						table.insert(moves,{offx+self.rect.x,offy+self.rect.y})
					end
				end
			end
		end

		return moves
	end

	return Circle
end

return gen