defmodule Mix.Tasks.Kopokopo.TestPayment do
  @moduledoc """
  Sends a Kopo Kopo STK Push test prompt.

      mix kopokopo.test_payment
      mix kopokopo.test_payment 0740769596 10
  """

  use Mix.Task

  @shortdoc "Sends a Kopo Kopo STK Push test prompt"

  @impl Mix.Task
  def run(args) do
    Mix.Task.run("app.start")

    {phone, amount} =
      case args do
        [] -> {"0740769596", "1"}
        [phone] -> {phone, "1"}
        [phone, amount | _] -> {phone, amount}
      end

    Mix.shell().info("Sending Kopo Kopo STK Push test prompt to #{phone} for KES #{amount}...")

    case KopoKopo.test_prompt(phone, amount) do
      {:ok, %{location: location, reference: reference}} ->
        Mix.shell().info("Prompt sent.")
        Mix.shell().info("Reference: #{reference}")
        Mix.shell().info("Status URL: #{location}")

      {:error, reason} ->
        Mix.raise("Kopo Kopo test prompt failed: #{inspect(reason)}")
    end
  end
end