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#
# 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.
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# limitations under the License.

require "spec_helper"

describe DateTime do

  it_behaves_like "a class which converts to Time"

  describe "#to_bson" do

    context "when the date time is post epoch" do

      let(:obj)  { DateTime.new(2012, 1, 1, 0, 0, 0) }
      let(:bson) { [ (obj.to_time.to_f * 1000).to_i ].pack(BSON::Int64::PACK) }

      it_behaves_like "a serializable bson element"
    end

    context "when the date time is pre epoch" do

      let(:obj)  { DateTime.new(1969, 1, 1, 0, 0, 0) }
      let(:bson) { [ (obj.to_time.to_f * 1000).to_i ].pack(BSON::Int64::PACK) }

      it_behaves_like "a serializable bson element"
    end

    context "when the dates don't both use Gregorian" do
      
      let(:shakespeare_datetime) do 
        DateTime.iso8601('1616-04-23', Date::ENGLAND)
      end

      let(:gregorian_datetime) do
        DateTime.iso8601('1616-04-23', Date::GREGORIAN)
      end

      context "when putting to bson" do 
        
        let(:shakespeare) do
          { a: shakespeare_datetime }.to_bson
        end

        let(:gregorian) do
          { a: gregorian_datetime }.to_bson
        end

        it "does not equal each other" do 
          expect(shakespeare.to_s).to_not eq(gregorian.to_s)
        end

        it "the english date is 10 days later" do 
          expect(shakespeare.to_s).to eq({ a: DateTime.iso8601('1616-05-03', Date::GREGORIAN) }.to_bson.to_s)
        end
      end

      context "when putting and receiving from bson" do 

        let(:shakespeare) do
          Hash.from_bson(BSON::ByteBuffer.new({ a: shakespeare_datetime }.to_bson.to_s))
        end

        let(:gregorian) do
          Hash.from_bson(BSON::ByteBuffer.new({ a: gregorian_datetime }.to_bson.to_s))
        end

        it "does not equal each other" do
          expect(shakespeare).to_not eq(gregorian)
        end

        it "the english date is 10 days later" do
          expect(shakespeare[:a]).to eq(DateTime.iso8601('1616-05-03', Date::GREGORIAN).to_time)
        end

        it "the gregorian date is the same" do
          expect(gregorian[:a]).to eq(DateTime.iso8601('1616-04-23', Date::GREGORIAN).to_time)
        end
      end
    end
  end
end