local mqtt = require("mqtt_library")

function mqttcb(topic, message)
   print("Received: " .. topic .. ": " .. message)
end


function blip (vel)
  local x, y = 0, 0
  local width, height = love.graphics.getDimensions( )
  return {
    update = coroutine.wrap (function ()
      while true do
        x = x+vel/10
        if x > width then
          x = 0
        end
        coroutine.yield()
      end
      return true
    end),
    affected = function (pos)
      if pos>x and pos<x+10 then
        return true
      else
        return false
      end
    end,
    draw = function ()
      love.graphics.rectangle("line", x, y, 10, 10)
    end
  }
end

function jogador()
  local x, y = 0, 200
  local width, height = love.graphics.getDimensions( )
  return {
  try = function ()
    return x
  end,
  update = function (dt)
    x = x + 5
    if x > width then
      x = 0
    end
  end,
  draw = function ()
    love.graphics.rectangle("line", x, y, 30, 10)
  end
  }
end

function love.keypressed(key)
  if key == 'a' then
    mqtt_client:publish("log", "atirou")
    pos = jog.try()
    for i in ipairs(listabls) do
      local hit = listabls[i].affected(pos)
      if hit then
        table.remove(listabls, i)
      end
    end
  end
end

function love.load()
  mqtt_client = mqtt.client.create("127.0.0.1", 1883, mqttcb)
  mqtt_client:connect("cliente love")
  mqtt_client:subscribe({"controle"})
  jog = jogador()
  listabls = {}
  for i = 1, 5 do
    listabls[i] = blip(i)
  end
end

function love.draw()
  jog.draw()
  for i = 1,#listabls do
    listabls[i].draw()
  end
end

function love.update(dt)
  mqtt_client:handler()
  jog.update(dt)
  for i = 1,#listabls do
    listabls[i].update()
  end
end