# frozen_string_literal: true

RSpec.describe TopicTimestampChanger do
  describe "#change!" do
    let(:old_timestamp) { Time.zone.now }
    let(:topic) { Fabricate(:topic, created_at: old_timestamp) }
    let!(:p1) { Fabricate(:post, topic: topic, created_at: old_timestamp) }
    let!(:p2) { Fabricate(:post, topic: topic, created_at: old_timestamp + 1.day) }

    context 'when new timestamp is in the future' do
      let(:new_timestamp) { old_timestamp + 2.day }

      it 'should raise the right error' do
        expect { TopicTimestampChanger.new(topic: topic, timestamp: new_timestamp.to_f).change! }
          .to raise_error(TopicTimestampChanger::InvalidTimestampError)
      end
    end

    context 'when new timestamp is in the past' do
      let(:new_timestamp) { old_timestamp - 2.day }

      it 'changes the timestamp of the topic and opening post' do
        freeze_time
        TopicTimestampChanger.new(topic: topic, timestamp: new_timestamp.to_f).change!

        topic.reload
        p1.reload
        p2.reload
        last_post_created_at = p2.created_at

        expect(topic.created_at).to eq_time(new_timestamp)
        expect(topic.updated_at).to eq_time(new_timestamp)
        expect(topic.bumped_at).to eq_time(last_post_created_at)
        expect(topic.last_posted_at).to eq_time(last_post_created_at)

        expect(p1.created_at).to eq_time(new_timestamp)
        expect(p1.updated_at).to eq_time(new_timestamp)

        expect(p2.created_at).to eq_time(new_timestamp + 1.day)
        expect(p2.updated_at).to eq_time(new_timestamp + 1.day)
      end

      context 'when posts have timestamps in the future' do
        it 'should set the new timestamp as the default timestamp' do
          new_timestamp = freeze_time

          p3 = Fabricate(:post, topic: topic, created_at: new_timestamp + 3.days)
          TopicTimestampChanger.new(topic: topic, timestamp: new_timestamp.to_f).change!

          p3.reload

          expect(p3.created_at).to eq_time(new_timestamp)
          expect(p3.updated_at).to eq_time(new_timestamp)
        end
      end
    end

    it 'deletes the stats cache' do
      Discourse.redis.set AdminDashboardData.stats_cache_key, "X"
      Discourse.redis.set About.stats_cache_key, "X"

      TopicTimestampChanger.new(topic: topic, timestamp: Time.zone.now.to_f).change!

      expect(Discourse.redis.get(AdminDashboardData.stats_cache_key)).to eq(nil)
      expect(Discourse.redis.get(About.stats_cache_key)).to eq(nil)
    end
  end
end