# frozen_string_literal: true

RSpec.describe Chat::Service::UpdateChannel do
  subject(:result) { described_class.call(guardian: guardian, channel_id: channel.id, **params) }

  fab!(:channel) { Fabricate(:chat_channel) }
  fab!(:current_user) { Fabricate(:admin) }

  let(:guardian) { Guardian.new(current_user) }
  let(:params) do
    {
      name: "cool channel",
      description: "a channel description",
      slug: "snail",
      allow_channel_wide_mentions: true,
      auto_join_users: false,
    }
  end

  context "when the user cannot edit the channel" do
    fab!(:current_user) { Fabricate(:user) }

    it { is_expected.to fail_a_policy(:check_channel_permission) }
  end

  context "when the user tries to edit a DM channel" do
    fab!(:channel) { Fabricate(:direct_message_channel, users: [current_user, Fabricate(:user)]) }

    it { is_expected.to fail_a_policy(:no_direct_message_channel) }
  end

  context "when channel is a category one" do
    context "when a valid user provides valid params" do
      let(:message) do
        MessageBus.track_publish(ChatPublisher::CHANNEL_EDITS_MESSAGE_BUS_CHANNEL) { result }.first
      end

      it "sets the service result as successful" do
        expect(result).to be_a_success
      end

      it "updates the channel accordingly" do
        result
        expect(channel.reload).to have_attributes(
          name: "cool channel",
          slug: "snail",
          description: "a channel description",
          allow_channel_wide_mentions: true,
          auto_join_users: false,
        )
      end

      it "publishes a MessageBus message" do
        expect(message.data).to eq(
          {
            chat_channel_id: channel.id,
            name: "cool channel",
            description: "a channel description",
            slug: "snail",
          },
        )
      end

      context "when the name is blank" do
        before { params[:name] = "" }

        it "nils out the name" do
          result
          expect(channel.reload.name).to be_nil
        end
      end

      context "when the description is blank" do
        before do
          channel.update!(description: "something")
          params[:description] = ""
        end

        it "nils out the description" do
          result
          expect(channel.reload.description).to be_nil
        end
      end

      context "when auto_join_users is set to 'true'" do
        before do
          channel.update!(auto_join_users: false)
          params[:auto_join_users] = true
        end

        it "updates the model accordingly" do
          result
          expect(channel.reload).to have_attributes(auto_join_users: true)
        end

        it "auto joins users" do
          expect_enqueued_with(
            job: :auto_manage_channel_memberships,
            args: {
              chat_channel_id: channel.id,
            },
          ) { result }
        end
      end
    end
  end
end