defmodule Reactivity.Test do
  require Integer
  require Logger

  alias Reactivity.Signal.Source
  
  import Reactivity
  
  def hot_cold(t) do
    if t > 30 do
      "hot"
    else
      "cold"
    end
  end

  def init do
    {:ok, t} = Source.new(fn(_old_value) -> Enum.random(10..100) end, -1, 100, :temperature)
    #{:ok, h} = Source.new(fn(_old_value) -> Enum.random(60..100) end, -1, 100, :humidity)
  end
  
  def test do
    # Create a new signal :hotcold based on the source :temperature.
    source(:temperature)
    |> liftapp(&hot_cold/1)
    |> register(:hotcold)
    
    # Create a new signal :kelvin based on the source :temperature
    source(:temperature)
    |> liftapp(&(&1 + 237.15))
    |> register(:kelvin)
    |> liftapp(&(IO.puts &1))

    # Print out hot/cold for the kelvin signal
    source(:kelvin)
    |> liftapp(&hot_cold/1)
    |> liftapp(&(Logger.debug "Kelvin: #{&1}"))
  end
end