defmodule Reactivity.Test do
  require Integer
  require Logger

  alias Reactivity.Signal.Source

  import Reactivity

  def hot_cold(t) do
    if t > 300 do
      :"🌶️"
    else
      :"❄️"
    end
  end

  def init do
    {:ok, t} = Source.new(fn(_old_value) -> Enum.random(0..500) end, -1, 100, :temperature)
    #{:ok, h} = Source.new(fn(_old_value) -> Enum.random(60..100) end, -1, 100, :humidity)
  end

  def test do
    # Subscribe to new signals.
    Reactivity.Registry.subscribe(self())

    # Create a new signal :hotcold based on the source :temperature.
    source(:temperature)
    |> liftapp(&hot_cold/1)
    |> register(:hotcold)


    receive do
      {:new_signal, source, name} ->
        source(name)
        |> liftapp(&(IO.puts "value for new signal #{name}: #{inspect &1}"))
    end

    # 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