local MenuBack = Object:extend()

function MenuBack:new()
    self.backx = 0
    self.bordery = 0
    self.turn = 0
    self.back = love.graphics.newImage("assets/gui/back/background.png")
    self.border = love.graphics.newImage("assets/gui/back/border.png")
    self.emblem = love.graphics.newImage("assets/gui/back/emblem.png")

    self.canvas = nil
end


function MenuBack:update(dt)
    self.backx = (self.backx + dt * 20) % 96
    self.bordery = (self.bordery + dt * 35) % 160
    self.turn = self.turn + (dt/1.5) % 1

    self.canvas = love.graphics.newCanvas( 424, 240 )
    love.graphics.setCanvas(self.canvas)
    for i = 0, (math.ceil(424/96)), 1 do
        for j = 0, (math.ceil(240/96)), 1 do
            love.graphics.draw(self.back, self.backx + ((i - 1 ) * 96), self.backx + ((j - 1 ) * 96))
        end
    end

    for j = 0, (math.ceil(240/160)), 1 do
        love.graphics.draw(self.border, 0, self.bordery + ((j - 1) * 160))
    end
    love.graphics.draw(self.emblem, 424, 240 - 32, self.turn, 0.8, 0.8, 200, 200)
    love.graphics.setColor(1, 1, 1, 0.85)
    love.graphics.rectangle("fill", 0, 0, 424, 240)
    love.graphics.setColor(1, 1, 1, 1)

    love.graphics.setCanvas()

end


function MenuBack:draw()
    love.graphics.setColor(1, 1, 1, 1)
    love.graphics.setBlendMode("multiply", "premultiplied")
    if (self.canvas ~= nil) then
        love.graphics.draw(self.canvas, 0, 0)
    end
    love.graphics.setBlendMode("alpha")
    love.graphics.setColor(1, 1, 1, 1)
end

return MenuBack