local gridgen = {}

function gridgen:new(game,x,y,cellsize)

	local Grid = game.objects.base:new(game,x,y,cellsize*5,cellsize*5)
	Grid.cellsize = cellsize
	Grid.sprites = {game:newImage("grid/tile.png"),game:newImage("grid/pink.png"),game:newImage("grid/blue.png")}
	Grid.pinkturn = game:newImage("text/turn/pink.png")
	Grid.blueturn = game:newImage("text/turn/blue.png")
	Grid:register("Grid")
	Grid.depth = -1
	Grid.turn= 3

	-- Spawn circles
	local i
	for i=1,5 do
		local xspawn = x+(i-1)*cellsize
		local pink = game.objects.circle:new(game,xspawn,y,"pink",Grid)
		local blue = game.objects.circle:new(game,xspawn,y+4*cellsize,"blue",Grid)
		game:summon(pink)
		game:summon(blue)
	end
	local neutron = game.objects.circle:new(game,x+2*cellsize,y+2*cellsize,"neutron",Grid)
	game:summon(neutron)

	function Grid:step(dt)
		-- Check if the neutron is on one side or the other
		local obj = self.game:findName("neutron")
		local i
		local winner = "None"
		for i=1,#obj do
			if obj[i].rect.y==self.rect.y then winner = "pink" end
			if obj[i].rect.y+obj[i].rect.h==self.rect.y+self.rect.h then winner = "blue" end
		end
		if winner~="None" then
			self:endgame(winner)
		end
	end

	function Grid:addturn()
		self.turn = self.turn + 1
		self.turn = self.turn%4
		-- Check if a move can be made
		local color = "blue"
		if self.turn%2==1 then
			if self.turn==1 then color = "pink" end
		else
			color = "neutron"
		end
		local count = 0
		local i
		local obj = self.game:findName(color)
		for i=1,#obj do
			count = count + #obj[i]:findAvailableMoves()		
		end
		if count==0 then
			local win = "blue"
			if self.turn < 2 then win = "pink" end
			self:endgame(win)
		end
	end

	function Grid:endgame(winner)
		print(winner.." won !")
		self.game.scenes:ending(self.game,winner)
	end

	function Grid:draw()
		local y
		local x
		for y=1,5 do
			for x=1,5 do
				local spriteindex = 1
				if y==1 then spriteindex = 2 end
				if y==5 then spriteindex = 3 end
				lg.draw(self.sprites[spriteindex],self.rect[1]-self.game.camerax-self.spriteoffx+(x-1)*self.cellsize,self.rect[2]-self.game.cameray-self.spriteoffy+(y-1)*self.cellsize)
			end
		end

		if self.turn<2 then
			-- Draw "pink's turn"
			lg.draw(self.pinkturn,(self.game.WIDTH-self.pinkturn:getWidth())/2,0)
		else
			-- Draw "Blue's turn"
			lg.draw(self.blueturn,(self.game.WIDTH-self.blueturn:getWidth())/2,self.game.HEIGHT-self.blueturn:getHeight())
		end
	end

	return Grid
end

return gridgen