defmodule LineMessage.EventHandle do
  use Maru.Router
  plug Plug.Logger
  plug Plug.Parsers, parsers: [:json],
    json_decoder: Poison

  get "/" do
    conn |> text("OK")
  end

  params do
    requires :events, type: List do
      requires :replyToken
      requires :type
      optional :timestamp
      requires :source, type: Map do
	requires :type
	requires :userId
      end
      optional :message, type: Map do
	requires :id
	requires :type
	optional :text
      end
      optional :beacon, type: Map do
	requires :hwid
	requires :type
      end
    end
  end
  
  post "/" do
    handle_events(params[:events])
    conn |> text("OK")
  end
  
  def handle_events([]), do: {:ok}
  def handle_events([event|t]) do
    case event[:type] do
      "message" -> handle_message(event[:replyToken], event[:source], event[:message])
      "beacon"  -> handle_beacon(event[:replyToken], event[:source], event[:beacon])
    end
    handle_events(t)
  end

  def handle_message(replyToken, source, message) do
    eventHandler = Application.get_env(:line_message, :eventHandler)
    eventHandler.handle_message(replyToken, source, message)
  end  
  def handle_beacon(replyToken, source, beacon) do
    eventHandler = Application.get_env(:line_message, :eventHandler)
    eventHandler.handle_beacon(replyToken, source, beacon)
  end
  
end