require 'rails_helper'

describe TopicUser do
  let :watching do
    TopicUser.notification_levels[:watching]
  end

  let :regular do
    TopicUser.notification_levels[:regular]
  end

  let :tracking do
    TopicUser.notification_levels[:tracking]
  end

  describe "#unwatch_categories!" do
    it "correctly unwatches categories" do

      op_topic = Fabricate(:topic)
      another_topic = Fabricate(:topic)
      tracked_topic = Fabricate(:topic)

      user = op_topic.user

      TopicUser.change(user.id, op_topic, notification_level: watching)
      TopicUser.change(user.id, another_topic, notification_level: watching)
      TopicUser.change(user.id, tracked_topic, notification_level: watching, total_msecs_viewed: SiteSetting.default_other_auto_track_topics_after_msecs + 1)

      TopicUser.unwatch_categories!(user, [Fabricate(:category).id, Fabricate(:category).id])
      expect(TopicUser.get(another_topic, user).notification_level).to eq(watching)

      TopicUser.unwatch_categories!(user, [op_topic.category_id])

      expect(TopicUser.get(op_topic, user).notification_level).to eq(watching)
      expect(TopicUser.get(another_topic, user).notification_level).to eq(regular)
      expect(TopicUser.get(tracked_topic, user).notification_level).to eq(tracking)
    end

  end

  describe '#notification_levels' do
    context "verify enum sequence" do
      before do
        @notification_levels = TopicUser.notification_levels
      end

      it "'muted' should be at 0 position" do
        expect(@notification_levels[:muted]).to eq(0)
      end

      it "'watching' should be at 3rd position" do
        expect(@notification_levels[:watching]).to eq(3)
      end
    end
  end

  describe '#notification_reasons' do
    context "verify enum sequence" do
      before do
        @notification_reasons = TopicUser.notification_reasons
      end

      it "'created_topic' should be at 1st position" do
        expect(@notification_reasons[:created_topic]).to eq(1)
      end

      it "'plugin_changed' should be at 9th position" do
        expect(@notification_reasons[:plugin_changed]).to eq(9)
      end
    end
  end

  it { is_expected.to belong_to :user }
  it { is_expected.to belong_to :topic }

  let(:user) { Fabricate(:user) }

  let(:topic) {
    u = Fabricate(:user)
    guardian = Guardian.new(u)
    TopicCreator.create(u, guardian, title: "this is my topic title")
  }
  let(:topic_user) { TopicUser.get(topic, user) }
  let(:topic_creator_user) { TopicUser.get(topic, topic.user) }

  let(:post) { Fabricate(:post, topic: topic, user: user) }
  let(:new_user) {
    u = Fabricate(:user)
    u.user_option.update_columns(auto_track_topics_after_msecs: 1000)
    u
  }

  let(:topic_new_user) { TopicUser.get(topic, new_user) }
  let(:yesterday) { DateTime.now.yesterday }

  def ensure_topic_user
    TopicUser.change(user, topic, last_emailed_post_number: 1)
  end

  describe "unpinned" do

    it "defaults to blank" do
      ensure_topic_user
      expect(topic_user.cleared_pinned_at).to be_blank
    end

  end

  describe 'notifications' do
    it 'should trigger the right DiscourseEvent' do
      begin
        called = false
        DiscourseEvent.on(:topic_notification_level_changed) { called = true }

        TopicUser.change(user.id, topic.id, notification_level: TopicUser.notification_levels[:tracking])

        expect(called).to eq(true)
      ensure
        DiscourseEvent.off(:topic_notification_level_changed) { called = true }
      end
    end

    it 'should be set to tracking if auto_track_topics is enabled' do
      user.user_option.update_column(:auto_track_topics_after_msecs, 0)
      ensure_topic_user
      expect(TopicUser.get(topic, user).notification_level).to eq(TopicUser.notification_levels[:tracking])
    end

    it 'should reset regular topics to tracking topics if auto track is changed' do
      ensure_topic_user
      user.user_option.auto_track_topics_after_msecs = 0
      user.user_option.save
      expect(topic_user.notification_level).to eq(TopicUser.notification_levels[:tracking])
    end

    it 'should be set to "regular" notifications, by default on non creators' do
      ensure_topic_user
      expect(TopicUser.get(topic, user).notification_level).to eq(TopicUser.notification_levels[:regular])
    end

    it 'reason should reset when changed' do
      topic.notify_muted!(topic.user)
      expect(TopicUser.get(topic, topic.user).notifications_reason_id).to eq(TopicUser.notification_reasons[:user_changed])
    end

    it 'should have the correct reason for a user change when watched' do
      topic.notify_watch!(user)
      expect(topic_user.notification_level).to eq(TopicUser.notification_levels[:watching])
      expect(topic_user.notifications_reason_id).to eq(TopicUser.notification_reasons[:user_changed])
      expect(topic_user.notifications_changed_at).not_to eq(nil)
    end

    it 'should have the correct reason for a user change when set to regular' do
      topic.notify_regular!(user)
      expect(topic_user.notification_level).to eq(TopicUser.notification_levels[:regular])
      expect(topic_user.notifications_reason_id).to eq(TopicUser.notification_reasons[:user_changed])
      expect(topic_user.notifications_changed_at).not_to eq(nil)
    end

    it 'should have the correct reason for a user change when set to regular' do
      topic.notify_muted!(user)
      expect(topic_user.notification_level).to eq(TopicUser.notification_levels[:muted])
      expect(topic_user.notifications_reason_id).to eq(TopicUser.notification_reasons[:user_changed])
      expect(topic_user.notifications_changed_at).not_to eq(nil)
    end

    it 'should watch topics a user created' do
      expect(topic_creator_user.notification_level).to eq(TopicUser.notification_levels[:watching])
      expect(topic_creator_user.notifications_reason_id).to eq(TopicUser.notification_reasons[:created_topic])
    end
  end

  describe 'visited at' do

    it 'set upon initial visit' do
      freeze_time yesterday

      TopicUser.track_visit!(topic.id, user.id)

      expect(topic_user.first_visited_at.to_i).to eq(yesterday.to_i)
      expect(topic_user.last_visited_at.to_i).to eq(yesterday.to_i)
    end

    it 'updates upon repeat visit' do
      freeze_time yesterday

      TopicUser.track_visit!(topic.id, user.id)

      freeze_time Time.zone.now

      TopicUser.track_visit!(topic.id, user.id)
      # reload is a no go
      topic_user = TopicUser.get(topic, user)
      expect(topic_user.first_visited_at.to_i).to eq(yesterday.to_i)
      expect(topic_user.last_visited_at.to_i).to eq(Time.zone.now.to_i)

    end
  end

  describe 'read tracking' do

    context "without auto tracking" do

      let(:topic_user) { TopicUser.get(topic, user) }

      it 'should create a new record for a visit' do
        freeze_time yesterday

        TopicUser.update_last_read(user, topic.id, 1, 1, 0)

        expect(topic_user.last_read_post_number).to eq(1)
        expect(topic_user.last_visited_at.to_i).to eq(yesterday.to_i)
        expect(topic_user.first_visited_at.to_i).to eq(yesterday.to_i)
      end

      it 'should update the record for repeat visit' do

        today = Time.zone.now
        freeze_time Time.zone.now

        TopicUser.update_last_read(user, topic.id, 1, 1, 0)

        tomorrow = 1.day.from_now
        freeze_time tomorrow

        Fabricate(:post, topic: topic, user: user)
        TopicUser.update_last_read(user, topic.id, 2, 1, 0)
        topic_user = TopicUser.get(topic, user)

        expect(topic_user.last_read_post_number).to eq(2)
        expect(topic_user.last_visited_at.to_i).to eq(today.to_i)
        expect(topic_user.first_visited_at.to_i).to eq(today.to_i)
      end
    end

    context 'private messages' do
      let(:target_user) { Fabricate(:user) }

      let(:post) do
        create_post(
          archetype: Archetype.private_message,
          target_usernames: target_user.username
        )
      end

      let(:topic) { post.topic }

      it 'should ensure recepients and senders are watching' do
        expect(TopicUser.get(topic, post.user).notification_level)
          .to eq(TopicUser.notification_levels[:watching])

        expect(TopicUser.get(topic, target_user).notification_level)
          .to eq(TopicUser.notification_levels[:watching])
      end

      it 'should ensure invited user is watching once visited' do
        another_user = Fabricate(:user)
        topic.invite(target_user, another_user.username)
        TopicUser.track_visit!(topic.id, another_user.id)

        expect(TopicUser.get(topic, another_user).notification_level)
          .to eq(TopicUser.notification_levels[:watching])

        another_user = Fabricate(:user)
        TopicUser.track_visit!(topic.id, another_user.id)

        expect(TopicUser.get(topic, another_user).notification_level)
          .to eq(TopicUser.notification_levels[:regular])
      end

      describe 'inviting a group' do
        let(:group) do
          Fabricate(:group,
            default_notification_level: NotificationLevels.topic_levels[:tracking]
          )
        end

        it "should use group's default notification level" do
          another_user = Fabricate(:user)
          group.add(another_user)
          topic.invite_group(target_user, group)
          TopicUser.track_visit!(topic.id, another_user.id)

          expect(TopicUser.get(topic, another_user).notification_level)
            .to eq(TopicUser.notification_levels[:tracking])

          another_user = Fabricate(:user)
          topic.invite(target_user, another_user.username)
          TopicUser.track_visit!(topic.id, another_user.id)

          expect(TopicUser.get(topic, another_user).notification_level)
            .to eq(TopicUser.notification_levels[:watching])
        end
      end
    end

    context 'auto tracking' do

      let(:post_creator) { PostCreator.new(new_user, raw: Fabricate.build(:post).raw, topic_id: topic.id) }

      before do
        TopicUser.update_last_read(new_user, topic.id, 2, 2, 0)
      end

      it 'should automatically track topics you reply to' do
        post_creator.create
        expect(topic_new_user.notification_level).to eq(TopicUser.notification_levels[:tracking])
        expect(topic_new_user.notifications_reason_id).to eq(TopicUser.notification_reasons[:created_post])
      end

      it 'should update tracking state when you reply' do
        new_user.user_option.update_column(:notification_level_when_replying, 3)
        post_creator.create
        DB.exec("UPDATE topic_users set notification_level=2
                 WHERE topic_id = :topic_id AND user_id = :user_id",
          topic_id: topic_new_user.topic_id, user_id: topic_new_user.user_id)

        TopicUser.auto_notification(topic_new_user.user_id, topic_new_user.topic_id, TopicUser.notification_reasons[:created_post], TopicUser.notification_levels[:watching])

        tu = TopicUser.find_by(user_id: topic_new_user.user_id, topic_id: topic_new_user.topic_id)
        expect(tu.notification_level).to eq(TopicUser.notification_levels[:watching])
      end

      it 'should not update tracking state when you reply' do
        new_user.user_option.update_column(:notification_level_when_replying, 3)
        post_creator.create
        DB.exec("UPDATE topic_users set notification_level=3
                       WHERE topic_id = :topic_id AND user_id = :user_id", topic_id: topic_new_user.topic_id, user_id: topic_new_user.user_id)
        TopicUser.auto_notification(topic_new_user.user_id, topic_new_user.topic_id, TopicUser.notification_reasons[:created_post], TopicUser.notification_levels[:tracking])

        tu = TopicUser.find_by(user_id: topic_new_user.user_id, topic_id: topic_new_user.topic_id)
        expect(tu.notification_level).to eq(TopicUser.notification_levels[:watching])
      end

      it 'should not update tracking state when state manually set to normal you reply' do
        new_user.user_option.update_column(:notification_level_when_replying, 3)
        post_creator.create
        DB.exec("UPDATE topic_users set notification_level=1
                       WHERE topic_id = :topic_id AND user_id = :user_id", topic_id: topic_new_user.topic_id, user_id: topic_new_user.user_id)
        TopicUser.auto_notification(topic_new_user.user_id, topic_new_user.topic_id, TopicUser.notification_reasons[:created_post], TopicUser.notification_levels[:tracking])

        tu = TopicUser.find_by(user_id: topic_new_user.user_id, topic_id: topic_new_user.topic_id)
        expect(tu.notification_level).to eq(TopicUser.notification_levels[:regular])
      end

      it 'should not update tracking state when state manually set to muted you reply' do
        new_user.user_option.update_column(:notification_level_when_replying, 3)
        post_creator.create
        DB.exec("UPDATE topic_users set notification_level=0
                       WHERE topic_id = :topic_id AND user_id = :user_id", topic_id: topic_new_user.topic_id, user_id: topic_new_user.user_id)
        TopicUser.auto_notification(topic_new_user.user_id, topic_new_user.topic_id, TopicUser.notification_reasons[:created_post], TopicUser.notification_levels[:tracking])

        tu = TopicUser.find_by(user_id: topic_new_user.user_id, topic_id: topic_new_user.topic_id)
        expect(tu.notification_level).to eq(TopicUser.notification_levels[:muted])
      end

      it 'should not automatically track topics you reply to and have set state manually' do
        post_creator.create
        TopicUser.change(new_user, topic, notification_level: TopicUser.notification_levels[:regular])
        expect(topic_new_user.notification_level).to eq(TopicUser.notification_levels[:regular])
        expect(topic_new_user.notifications_reason_id).to eq(TopicUser.notification_reasons[:user_changed])
      end

      it 'should automatically track topics after they are read for long enough' do
        expect(topic_new_user.notification_level).to eq(TopicUser.notification_levels[:regular])
        TopicUser.update_last_read(new_user, topic.id, 2, 2, SiteSetting.default_other_auto_track_topics_after_msecs + 1)
        expect(TopicUser.get(topic, new_user).notification_level).to eq(TopicUser.notification_levels[:tracking])
      end

      it 'should not automatically track topics after they are read for long enough if changed manually' do
        TopicUser.change(new_user, topic, notification_level: TopicUser.notification_levels[:regular])
        TopicUser.update_last_read(new_user, topic, 2, 2, SiteSetting.default_other_auto_track_topics_after_msecs + 1)
        expect(topic_new_user.notification_level).to eq(TopicUser.notification_levels[:regular])
      end

      it 'should not automatically track PMs' do
        new_user.user_option.update!(auto_track_topics_after_msecs: 0)

        another_user = Fabricate(:user)
        pm = Fabricate(:private_message_topic, user: another_user)
        pm.invite(another_user, new_user.username)

        TopicUser.track_visit!(pm.id, new_user.id)
        TopicUser.update_last_read(new_user, pm.id, 2, 2, 1000)
        expect(TopicUser.get(pm, new_user).notification_level).to eq(TopicUser.notification_levels[:watching])
      end
    end
  end

  describe 'change a flag' do

    it "only inserts a row once, even on repeated calls" do

      topic; user

      expect {
        TopicUser.change(user, topic.id, total_msecs_viewed: 1)
        TopicUser.change(user, topic.id, total_msecs_viewed: 2)
        TopicUser.change(user, topic.id, total_msecs_viewed: 3)
      }.to change(TopicUser, :count).by(1)
    end

    describe 'after creating a row' do
      before do
        ensure_topic_user
      end

      it 'has a lookup' do
        expect(TopicUser.lookup_for(user, [topic])).to be_present
      end

      it 'has a key in the lookup for this forum topic' do
        expect(TopicUser.lookup_for(user, [topic]).has_key?(topic.id)).to eq(true)
      end

    end

  end

  it "can scope by tracking" do
    TopicUser.create!(user_id: 1, topic_id: 1, notification_level: TopicUser.notification_levels[:tracking])
    TopicUser.create!(user_id: 2, topic_id: 1, notification_level: TopicUser.notification_levels[:watching])
    TopicUser.create!(user_id: 3, topic_id: 1, notification_level: TopicUser.notification_levels[:regular])

    expect(TopicUser.tracking(1).count).to eq(2)
    expect(TopicUser.tracking(10).count).to eq(0)
  end

  it "is able to self heal" do
    p1 = Fabricate(:post)
    p2 = Fabricate(:post, user: p1.user, topic: p1.topic, post_number: 2)
    p1.topic.notifier.watch_topic!(p1.user_id)

    DB.exec("UPDATE topic_users set highest_seen_post_number=1, last_read_post_number=0
                       WHERE topic_id = :topic_id AND user_id = :user_id", topic_id: p1.topic_id, user_id: p1.user_id)

    [p1, p2].each do |p|
      PostTiming.create(topic_id: p.topic_id, post_number: p.post_number, user_id: p.user_id, msecs: 100)
    end

    TopicUser.ensure_consistency!

    tu = TopicUser.find_by(user_id: p1.user_id, topic_id: p1.topic_id)
    expect(tu.last_read_post_number).to eq(p2.post_number)
    expect(tu.highest_seen_post_number).to eq(2)

  end

  describe "mailing_list_mode" do

    it "will receive email notification for every topic" do
      user1 = Fabricate(:user)

      Jobs.run_immediately!
      SiteSetting.default_email_mailing_list_mode = true
      SiteSetting.default_email_mailing_list_mode_frequency = 1

      user2 = Fabricate(:user)
      post = create_post

      user3 = Fabricate(:user)
      create_post(topic_id: post.topic_id)

      # mails posts from earlier topics
      tu = TopicUser.find_by(user_id: user3.id, topic_id: post.topic_id)
      expect(tu.last_emailed_post_number).to eq(2)

      # mails nothing to random users
      tu = TopicUser.find_by(user_id: user1.id, topic_id: post.topic_id)
      expect(tu).to eq(nil)

      # mails other user
      tu = TopicUser.find_by(user_id: user2.id, topic_id: post.topic_id)
      expect(tu.last_emailed_post_number).to eq(2)
    end
  end

end