defmodule AuthIntroduct do
  import Plug.Conn
  import AuthIntroduct.TokenHelper
  import AuthIntroduct.Config
  import AuthIntroduct.User

  defmacro __using__(options) do
    IO.puts("options in using: #{inspect options}")
    behaviour = get_module(Keyword.get(options, :module))
    aud = Keyword.get(options, :aud)
    iss = Keyword.get(options, :iss)
    quote do
      alias unquote(behaviour), as: Mod

      @aud unquote(aud)
      @iss unquote(iss)
      def call(conn, options) do
        try do

          with token <- get_token(conn.req_headers),
               secret_key <- get_secret_key,
               {:ok, jwt_body} <- verify_jwt(token, secret_key, @aud, @iss),
               {:ok, sub} <- get_jwt_param(jwt_body, "sub"),
               {:ok, role} <- get_jwt_param(jwt_body, "role"),
               user <- Mod.get_user(conn.body_params[options[:key]]),
               answer <- validate_user(conn.body_params[options[:key]], sub, user, role, Mod.get_role(user.role_id))
            do
            if {:ok, :authorized} == answer do
              conn
            else
              conn |> resp(401, "unauthorized") |> halt()
            end
          end

#          user_id = conn.body_params[options[:key]]
#          token = get_token(conn.req_headers)
#          IO.puts("authorization: #{inspect token}")
#          IO.puts("options_call: #{inspect options}")
#          secret_key = get_secret_key
#          IO.puts("secret_key: #{inspect secret_key}")
#          {:ok, jwt_body} = verify_jwt(token, secret_key, @aud, @iss)
#          IO.puts("verify_jwt: #{inspect jwt_body}")
#          {:ok, sub} = Map.fetch(jwt_body, "sub")
#          {:ok, role} = Map.fetch(jwt_body, "role")
#
#          IO.puts("sub: #{inspect sub}")
#          user = Mod.get_user(user_id)
#          answer = validate_user(user_id, sub, user, role, Mod.get_role(user.role_id))
#          IO.puts("validate_user: #{inspect answer}")
#          if {:ok, :authorized} == answer do
#            conn
#          else
#            conn |> resp(401, "unauthorized") |> halt()
#          end
        rescue
           e -> conn |> resp(401, "#{inspect e}") |> halt()
        end
      end

      def generate_token(conn, opt) do
        generate_jwt!(opt, get_secret_key, @aud, @iss)
      end
    end
  end
end