defmodule Alixir.Request do
  defstruct [
    :http_method,
    :url,
    :params,
    :headers,
    :body
  ]

  alias Alixir.Request

  @type status_code :: integer
  @type body :: String.t()
  @type reason :: String.t()

  @spec perform(%Request{}) :: {:ok, status_code, body} | {:error, reason}
  def perform(%Request{
        http_method: http_method,
        url: url,
        params: params,
        headers: headers,
        body: body
      })
      when http_method in ~w{put delete}a do
    do_perfom(http_method, url, body, List.wrap(headers), params: List.wrap(params))
  end

  @spec perform(%Request{http_method: :get, url: String.t()}) ::
          {:ok, status_code, body} | {:error, reason}
  def perform(%Request{http_method: :get, url: url}) do
    do_perfom(:get, url)
  end

  defp do_perfom(method, url, body \\ "", headers \\ [], options \\ []) do
    case HTTPoison.request(method, url, body, headers, options) do
      {:ok, %HTTPoison.Response{body: body, status_code: 200}} ->
        {:ok, 200, body}

      {:ok, %HTTPoison.Response{body: body, status_code: status_code}} ->
        {:error, status_code, body}

      {:error, %HTTPoison.Error{reason: reason}} ->
        {:error, reason}
    end
  end
end