require "file"
require "json"
require "log"

class ConfigInstance
  @@config = {} of String => JSON::Any
  @@loaded = false

  def config
    @@config
  end

  def config=(new_value)
    @@config = new_value
  end

  def loaded
    @@loaded
  end

  def loaded=(new_value)
    @@loaded = new_value
  end
end

Instance = ConfigInstance.new

module Config
  extend self

  def get_config_value(key) : JSON::Any | Nil
    Log.debug { "looking for #{key}" }
    if Instance.config.has_key? key
      Instance.config[key]
    else
      nil
    end
  end

  def is_loaded : Bool
    Instance.loaded
  end

  def load_config : Nil
    loaded_config = File.open("config.json") do |file|
      Hash(String, JSON::Any).from_json(file)
    end
    Log.debug { "loaded config is #{loaded_config}" }
    Instance.config = loaded_config
    Instance.loaded = true
    Log.debug { "instance config is #{Instance.config}" }
  end
end