require "http"

module Telepathy
    class Bot
        def initialize(@api_token : String)
            @request_base = "https://api.telegram.org/bot#{@api_token}"
            @this_user = uninitialized User?
            @this_user = get_me
            @last_update_id = uninitialized Int64?
            @last_update_id = nil
        end

        def get_me
            response = HTTP::Client.get(@request_base + "/getMe",
                                        headers: HTTP::Headers{"User-agent" => "Telepathy"})
            return Response(User).from_json(response.body).result
        end

        def get_updates
            update_data = {} of String => Int64 | String
            @last_update_id.try { |id| update_data["offset"] = id }
            response = HTTP::Client.get(@request_base + "/getUpdates",
                                        headers: HTTP::Headers{"User-agent" => "Telepathy", "Content-type" => "application/json" },
                                        body: update_data.to_json)
            updates = Response(Array(Update)).from_json(response.body).result
            updates.last?.try { |update| @last_update_id = update.update_id + 1 }
            return updates
        end
    end
end