#-- encoding: UTF-8

#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2021 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
# See COPYRIGHT and LICENSE files for more details.
#++

require 'spec_helper'

describe Groups::SetAttributesService, type: :model do
  subject(:service_call) { instance.call(call_attributes) }

  let(:user) { FactoryBot.build_stubbed(:user) }
  let(:contract_class) do
    contract = double('contract_class')

    allow(contract)
      .to receive(:new)
      .with(group, user, options: {})
      .and_return(contract_instance)

    contract
  end
  let(:contract_instance) do
    instance_double(ModelContract, validate: contract_valid, errors: contract_errors)
  end
  let(:contract_valid) { true }
  let(:contract_errors) do
    instance_double(ActiveRecord::ActiveRecordError)
  end
  let(:group_valid) { true }
  let(:instance) do
    described_class.new(user: user,
                        model: group,
                        contract_class: contract_class)
  end
  let(:call_attributes) { {} }
  let(:group) do
    FactoryBot.build_stubbed(:group) do |g|
      # To later check that it has not been called
      allow(g)
        .to receive(:save)
    end
  end

  describe 'call' do
    let(:call_attributes) do
      {
        name: 'The name'
      }
    end

    before do
      allow(group)
        .to receive(:valid?)
        .and_return(group_valid)

      allow(contract_instance)
        .to receive(:validate)
        .and_return(contract_valid)
    end

    it 'is successful' do
      expect(service_call)
        .to be_success
    end

    it 'sets the attributes' do
      service_call

      expect(group.lastname)
        .to eql call_attributes[:name]
    end

    it 'does not persist the group' do
      service_call

      expect(group)
        .not_to have_received(:save)
    end

    context 'with no changes to the users' do
      let(:call_attributes) do
        {
          name: 'My new group name'
        }
      end
      let(:first_user) { FactoryBot.build_stubbed(:user) }
      let(:second_user) { FactoryBot.build_stubbed(:user) }
      let(:first_group_user) { FactoryBot.build_stubbed(:group_user, user: first_user) }
      let(:second_group_user) { FactoryBot.build_stubbed(:group_user, user: second_user) }

      let(:group) do
        FactoryBot.build_stubbed(:group, group_users: [first_group_user, second_group_user])
      end

      let(:updated_group) do
        service_call.result
      end

      it 'does not change the users (Regression #38017)' do
        expect(updated_group.name).to eq 'My new group name'
        expect(updated_group.group_users.map(&:user_id))
          .to eql [first_user.id, second_user.id]

        expect(updated_group.group_users.any?(&:marked_for_destruction?)).to eq false
      end
    end

    context 'with changes to the users do' do
      let(:first_user) { FactoryBot.build_stubbed(:user) }
      let(:second_user) { FactoryBot.build_stubbed(:user) }
      let(:third_user) { FactoryBot.build_stubbed(:user) }

      let(:call_attributes) do
        {
          user_ids: [second_user.id, third_user.id]
        }
      end

      shared_examples_for 'updates the users' do
        let(:first_group_user) { FactoryBot.build_stubbed(:group_user, user: first_user) }
        let(:second_group_user) { FactoryBot.build_stubbed(:group_user, user: second_user) }

        let(:group) do
          FactoryBot.build_stubbed(:group, group_users: [first_group_user, second_group_user])
        end

        it 'adds the new users' do
          expect(service_call.result.group_users.map(&:user_id))
            .to eql [first_user.id, second_user.id, third_user.id]
        end

        it 'does not persist the new association' do
          expect(service_call.result.group_users.find { |gu| gu.user_id == third_user.id })
            .to be_new_record
        end

        it 'keeps the association already existing before' do
          expect(service_call.result.group_users.find { |gu| gu.user_id == second_user.id })
            .not_to be_marked_for_destruction
        end

        it 'marks not mentioned users to be removed' do
          expect(service_call.result.group_users.find { |gu| gu.user_id == first_user.id })
            .to be_marked_for_destruction
        end
      end

      context 'with a persisted record and integer values' do
        let(:call_attributes) do
          {
            user_ids: [second_user.id, third_user.id]
          }
        end

        it_behaves_like 'updates the users'
      end

      context 'with a persisted record and string values' do
        let(:call_attributes) do
          {
            user_ids: [second_user.id.to_s, third_user.id.to_s]
          }
        end

        it_behaves_like 'updates the users'
      end

      context 'with a new record' do
        let(:group) do
          Group.new
        end

        it 'sets the user' do
          expect(service_call.result.group_users.map(&:user_id))
            .to eql [second_user.id, third_user.id]
        end

        it 'does not persist the association' do
          expect(service_call.result.group_users.all(&:new_record?))
            .to be_truthy
        end
      end
    end
  end
end