class MetricsController < ActionController::API

  # POST /metric/:key
  def create
    key = params[:key]
    value = JSON.parse(request.body.read)["value"]

    metric = Metric.find_or_create_by(key: key)
    metric.value = value

    if metric.save()
      render json: {}
    else
      render json: { error: "Unable to save" }, status: :unprocessable_entity
    end
  end

  # GET /metric/
  def index
    returnable = []
    Metric.all.each do |metric|
      returnable << MetricOutput.new(metric.key, metric.value)
    end
    render json: returnable.to_json
  end

  # DELETE /metric/:key
  def delete
    key = params[:key]
    metric = Metric.find_by(key: key)
    if metric.destroy
      render json: {}
    else
      render json: { error: "Unable to delete" }, status: :unprocessable_entity
    end
  end

end