# Copyright 2017 Kouhei Sutou <kou@clear-code.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

module Arrow
  class Record
    attr_accessor :index
    def initialize(record_container, index)
      @record_container = record_container
      @index = index
    end

    def [](column_name_or_column_index)
      column = @record_container.find_column(column_name_or_column_index)
      return nil if column.nil?
      column[@index]
    end

    def columns
      @record_container.columns
    end

    def to_h
      attributes = {}
      @record_container.schema.fields.each_with_index do |field, i|
        attributes[field.name] = self[i]
      end
      attributes
    end

    def respond_to_missing?(name, include_private)
      return true if @record_container.find_column(name)
      super
    end

    def method_missing(name, *args, &block)
      if args.empty?
        column = @record_container.find_column(name)
        return column[@index] if column
      end
      super
    end
  end
end