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# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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 TimestampArray
    def get_value(i)
      cast_to_time(get_raw_value(i))
    end

    def unit
      @unit ||= value_data_type.unit
    end

    private
    def cast_to_time(raw_value)
      case unit
      when TimeUnit::SECOND
        ::Time.at(raw_value)
      when TimeUnit::MILLI
        ::Time.at(*raw_value.divmod(1_000))
      when TimeUnit::MICRO
        ::Time.at(*raw_value.divmod(1_000_000))
      else
        ::Time.at(raw_value / 1_000_000_000.0)
      end
    end
  end
end
