RLovelett/sports_data_api

module SportsDataApi
  class JsonData
    def initialize(json, override_var_name = nil)
      ivar = set_data_key(override_var_name)
      json.each_pair do |attr_name, attr_value|
        ivar[attr_name.to_sym] = attr_value
      end
    end

    def [](key)
      return send(key) if respond_to?(key)
      self.instance_variable_get("@#{instance_var_name}")[key]
    end

    private

    attr_reader :instance_var_name

    def set_data_key(override_var_name)
      var_name = override_var_name || class_name
      @instance_var_name = var_name
      self.class.class_eval { attr_reader :"#{var_name}" }
      self.instance_variable_set("@#{instance_var_name}", {})
    end

    def class_name
      @class_name ||= self
        .class
        .name
        .gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
        .gsub(/([a-z\d])([A-Z])/, '\1_\2')
        .split('::')
        .last
        .downcase
    end
  end
end