require 'rails_helper'

describe TopicTrackingState do

  let(:user) do
    Fabricate(:user)
  end

  let(:post) do
    create_post
  end

  let(:topic) { post.topic }

  describe '#publish_latest' do
    it 'can correctly publish latest' do
      message = MessageBus.track_publish("/latest") do
        described_class.publish_latest(topic)
      end.first

      data = message.data

      expect(data["topic_id"]).to eq(topic.id)
      expect(data["message_type"]).to eq(described_class::LATEST_MESSAGE_TYPE)
      expect(data["payload"]["archetype"]).to eq(Archetype.default)
    end

    describe 'private message' do
      let(:topic) { Fabricate(:private_message_topic) }

      it 'should not publish any message' do
        messages = MessageBus.track_publish do
          described_class.publish_latest(topic)
        end

        expect(messages).to eq([])
      end
    end
  end

  describe '#publish_unread' do
    it "can correctly publish unread" do
      message = MessageBus.track_publish(described_class.unread_channel_key(post.user.id)) do
        TopicTrackingState.publish_unread(post)
      end.first

      data = message.data

      expect(data["topic_id"]).to eq(topic.id)
      expect(data["message_type"]).to eq(described_class::UNREAD_MESSAGE_TYPE)
      expect(data["payload"]["archetype"]).to eq(Archetype.default)
    end

    describe 'for a private message' do
      let(:private_message_post) { Fabricate(:private_message_post) }
      let(:topic) { private_message_post.topic }

      before do
        TopicUser.change(
          topic.allowed_users.first.id,
          topic.id,
          notification_level: TopicUser.notification_levels[:tracking]
        )
      end

      it 'should not publish any message' do
        messages = MessageBus.track_publish do
          TopicTrackingState.publish_unread(private_message_post)
        end

        expect(messages).to eq([])
      end
    end
  end

  it "correctly handles muted categories" do

    user = Fabricate(:user)
    post

    report = TopicTrackingState.report(user)
    expect(report.length).to eq(1)

    CategoryUser.create!(user_id: user.id,
                         notification_level: CategoryUser.notification_levels[:muted],
                         category_id: post.topic.category_id
                         )

    create_post(topic_id: post.topic_id)

    report = TopicTrackingState.report(user)
    expect(report.length).to eq(0)

    TopicUser.create!(user_id: user.id, topic_id: post.topic_id, last_read_post_number: 1, notification_level: 3)

    report = TopicTrackingState.report(user)
    expect(report.length).to eq(1)
  end

  it "correctly handles capping" do
    user = Fabricate(:user)

    post1 = create_post
    Fabricate(:post, topic: post1.topic)

    post2 = create_post
    Fabricate(:post, topic: post2.topic)

    post3 = create_post
    Fabricate(:post, topic: post3.topic)

    tracking = {
      notification_level: TopicUser.notification_levels[:tracking],
      last_read_post_number: 1,
      highest_seen_post_number: 1
    }

    TopicUser.change(user.id, post1.topic_id, tracking)
    TopicUser.change(user.id, post2.topic_id, tracking)
    TopicUser.change(user.id, post3.topic_id, tracking)

    report = TopicTrackingState.report(user)
    expect(report.length).to eq(3)

  end

  it "correctly gets the tracking state" do
    report = TopicTrackingState.report(user)
    expect(report.length).to eq(0)

    post.topic.notifier.watch_topic!(post.topic.user_id)

    report = TopicTrackingState.report(user)

    expect(report.length).to eq(1)
    row = report[0]

    expect(row.topic_id).to eq(post.topic_id)
    expect(row.highest_post_number).to eq(1)
    expect(row.last_read_post_number).to eq(nil)
    expect(row.user_id).to eq(user.id)

    # lets not leak out random users
    expect(TopicTrackingState.report(post.user)).to be_empty

    # lets not return anything if we scope on non-existing topic
    expect(TopicTrackingState.report(user, post.topic_id + 1)).to be_empty

    # when we reply the poster should have an unread row
    create_post(user: user, topic: post.topic)

    report = TopicTrackingState.report(user)
    expect(report.length).to eq(0)

    report = TopicTrackingState.report(post.user)
    expect(report.length).to eq(1)

    row = report[0]

    expect(row.topic_id).to eq(post.topic_id)
    expect(row.highest_post_number).to eq(2)
    expect(row.last_read_post_number).to eq(1)
    expect(row.user_id).to eq(post.user_id)

    # when we have no permission to see a category, don't show its stats
    category = Fabricate(:category, read_restricted: true)

    post.topic.category_id = category.id
    post.topic.save

    expect(TopicTrackingState.report(post.user)).to be_empty
    expect(TopicTrackingState.report(user)).to be_empty
  end
end