# frozen_string_literal: true
# rubocop:todo all

require 'spec_helper'
require_relative '../shared/csot/examples'

describe Mongo::Operation::Insert::OpMsg do
  include CSOT::Examples

  let(:context) { Mongo::Operation::Context.new }

  let(:documents) { [{ :_id => 1, :foo => 1 }] }
  let(:session) { nil }
  let(:spec) do
    { :documents     => documents,
      :db_name       => authorized_collection.database.name,
      :coll_name     => authorized_collection.name,
      :write_concern => write_concern,
      :ordered       => true,
      :session       => session
    }
  end

  let(:write_concern) do
    Mongo::WriteConcern.get(w: :majority)
  end

  let(:op) { described_class.new(spec) }

  let(:connection) do
    double('connection').tap do |connection|
      allow(connection).to receive(:server).and_return(authorized_primary)
      allow(connection).to receive(:features).and_return(authorized_primary.features)
      allow(connection).to receive(:description).and_return(authorized_primary.description)
      allow(connection).to receive(:cluster_time).and_return(authorized_primary.cluster_time)
    end
  end

  describe '#initialize' do

    context 'spec' do

      it 'sets the spec' do
        expect(op.spec).to eq(spec)
      end
    end
  end

  describe '#==' do

    context 'spec' do

      context 'when two ops have the same specs' do
        let(:other) { described_class.new(spec) }

        it 'returns true' do
          expect(op).to eq(other)
        end
      end

      context 'when two ops have different specs' do
        let(:other_documents) { [{ :bar => 1 }] }
        let(:other_spec) do
          { :documents     => other_documents,
            :db_name       => authorized_collection.database.name,
            :insert        => authorized_collection.name,
            :write_concern => write_concern.options,
            :ordered       => true
          }
        end
        let(:other) { described_class.new(other_spec) }

        it 'returns false' do
          expect(op).not_to eq(other)
        end
      end
    end
  end

  describe 'write concern' do
    # https://jira.mongodb.org/browse/RUBY-2224
    require_no_linting

    context 'when write concern is not specified' do

      let(:spec) do
        { :documents     => documents,
          :db_name       => authorized_collection.database.name,
          :coll_name     => authorized_collection.name,
          :ordered       => true
        }
      end

      it 'does not include write concern in the selector' do
        expect(op.send(:command, connection)[:writeConcern]).to be_nil
      end
    end

    context 'when write concern is specified' do

      it 'includes write concern in the selector' do
        expect(op.send(:command, connection)[:writeConcern]).to eq(BSON::Document.new(write_concern.options))
      end
    end
  end

  describe '#message' do
    # https://jira.mongodb.org/browse/RUBY-2224
    require_no_linting

    let(:documents) do
      [ { foo: 1 }, { bar: 2 }]
    end

    let(:global_args) do
      {
          insert: TEST_COLL,
          ordered: true,
          writeConcern: write_concern.options,
          '$db' => SpecConfig.instance.test_db,
          lsid: session.session_id
      }
    end

    let!(:expected_payload_1) do
      Mongo::Protocol::Msg::Section1.new('documents', op.documents)
    end

    let(:session) do
      Mongo::Session.new(nil, authorized_client, implicit: true).tap do |session|
        allow(session).to receive(:session_id).and_return(42)
      end
    end

    context 'when the topology is replica set or sharded' do
      require_topology :replica_set, :sharded

      let(:expected_global_args) do
        global_args.merge(Mongo::Operation::CLUSTER_TIME => authorized_client.cluster.cluster_time)
      end

      it 'creates the correct OP_MSG message' do
        authorized_client.command(ping:1)
        RSpec::Mocks.with_temporary_scope do
          expect(Mongo::Protocol::Msg).to receive(:new).with([],
                                                              {},
                                                              expected_global_args,
                                                              expected_payload_1)
          op.send(:message, connection)
        end
      end
    end

    context 'when the topology is standalone' do
      require_topology :single

      let(:expected_global_args) do
        global_args
      end

      it 'creates the correct OP_MSG message' do
        RSpec::Mocks.with_temporary_scope do
          authorized_client.command(ping:1)
          expect(Mongo::Protocol::Msg).to receive(:new).with([],
                                                              {},
                                                              expected_global_args,
                                                              expected_payload_1)
          op.send(:message, connection)
        end
      end

      context 'when an implicit session is created and the topology is then updated and the server does not support sessions' do
        # Mocks on features are incompatible with linting
        require_no_linting

        let(:expected_global_args) do
          global_args.dup.tap do |args|
            args.delete(:lsid)
          end
        end

        before do
          session.implicit?.should be true
        end

        it 'creates the correct OP_MSG message' do
          RSpec::Mocks.with_temporary_scope do
            expect(connection.features).to receive(:sessions_enabled?).and_return(false)

            expect(expected_global_args).not_to have_key(:lsid)
            expect(Mongo::Protocol::Msg).to receive(:new).with([],
                                                                {},
                                                                expected_global_args,
                                                                expected_payload_1)
            op.send(:message, connection)
          end
        end
      end
    end

    context 'when the write concern is 0' do

      let(:write_concern) do
        Mongo::WriteConcern.get(w: 0)
      end

      context 'when the session is implicit' do

        let(:session) do
          Mongo::Session.new(nil, authorized_client, implicit: true).tap do |session|
            allow(session).to receive(:session_id).and_return(42)
            session.should be_implicit
          end
        end

        context 'when the topology is replica set or sharded' do
          require_topology :replica_set, :sharded

          let(:expected_global_args) do
            global_args.dup.tap do |args|
              args.delete(:lsid)
              args.merge!(Mongo::Operation::CLUSTER_TIME => authorized_client.cluster.cluster_time)
            end
          end

          it 'does not send a session id in the command' do
            authorized_client.command(ping:1)
            RSpec::Mocks.with_temporary_scope do
              expect(Mongo::Protocol::Msg).to receive(:new).with([:more_to_come],
                                                                  {},
                                                                  expected_global_args,
                                                                  expected_payload_1)
              op.send(:message, connection)
            end
          end
        end

        context 'when the topology is standalone' do
          require_topology :single

          let(:expected_global_args) do
            global_args.dup.tap do |args|
              args.delete(:lsid)
            end
          end

          it 'creates the correct OP_MSG message' do
            authorized_client.command(ping:1)
            RSpec::Mocks.with_temporary_scope do
              expect(Mongo::Protocol::Msg).to receive(:new).with([:more_to_come],
                                                                  {},
                                                                  expected_global_args,
                                                                  expected_payload_1)
              op.send(:message, connection)
            end
          end
        end
      end

      context 'when the session is explicit' do
        require_topology :replica_set, :sharded

        let(:session) do
          authorized_client.start_session
        end

        before do
          session.should_not be_implicit
        end

        let(:expected_global_args) do
          global_args.dup.tap do |args|
            args.delete(:lsid)
            args.merge!(Mongo::Operation::CLUSTER_TIME => authorized_client.cluster.cluster_time)
          end
        end

        it 'does not send a session id in the command' do
          authorized_client.command(ping:1)
          RSpec::Mocks.with_temporary_scope do
            expect(Mongo::Protocol::Msg).to receive(:new).with([:more_to_come],
                                                                {},
                                                                expected_global_args,
                                                                expected_payload_1)
            op.send(:message, connection)
          end
        end
      end
    end
  end

  it_behaves_like 'a CSOT-compliant OpMsg subclass'
end