#-- 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'
require 'rack/test'

describe 'API v3 capabilities resource', type: :request, content_type: :json do
  include Rack::Test::Methods
  include API::V3::Utilities::PathHelper

  subject(:response) { last_response }

  current_user do
    FactoryBot.create(:user,
                      member_in_project: project,
                      member_with_permissions: current_user_permissions)
  end
  let(:current_user_permissions) { [] }
  let(:other_user_permissions) { %i[manage_members] }
  let(:other_user_global_permissions) { %i[manage_user] }
  let(:project) { FactoryBot.create(:project) }
  let(:role) do
    FactoryBot.create(:role, permissions: other_user_permissions)
  end
  let(:global_role) do
    FactoryBot.create(:global_role, permissions: other_user_global_permissions)
  end
  let(:other_user) { FactoryBot.create(:user) }
  let(:other_user_global_member) do
    FactoryBot.create(:global_member,
                      principal: other_user,
                      roles: [global_role])
  end
  let(:other_user_member) do
    FactoryBot.create(:member,
                      principal: other_user,
                      roles: [role],
                      project: project)
  end

  describe 'GET api/v3/capabilities' do
    let(:setup) do
      other_user_global_member
      other_user_member
    end
    let(:filters) { nil }
    let(:path) { api_v3_paths.path_for(:capabilities, filters: filters, sort_by: [%i(id asc)]) }

    before do
      setup

      get path
    end

    context 'without params' do
      it 'responds 400 Bad Request' do
        expect(subject.status).to eq(400)
      end

      it 'communicates that either a context or a principal filter is required' do
        expect(subject.body)
          .to be_json_eql('Error'.to_json)
          .at_path('_type')

        expect(subject.body)
          .to be_json_eql('urn:openproject-org:api:v3:errors:InvalidQuery'.to_json)
          .at_path('errorIdentifier')
      end
    end

    context 'when filtering by principal id (with a user)' do
      let(:current_user_permissions) { %i[manage_members] }
      let(:filters) do
        [{ 'principalId' => {
          'operator' => '=',
          'values' => [current_user.id.to_s]
        } }]
      end

      it 'contains only the filtered capabilities in the response' do
        expect(subject.body)
          .to be_json_eql('3')
          .at_path('total')

        expect(subject.body)
          .to be_json_eql(api_v3_paths.user(current_user.id).to_json)
          .at_path('_embedded/elements/0/_links/principal/href')
      end
    end

    context 'with pageSize, offset and sortBy and filter' do
      def expect_self_link(link, overrides = {})
        href = JSON.parse(subject.body).dig('_links', link, 'href').split('?')
        expected_path_params = Rack::Utils.parse_nested_query(path.split('?').last)

        expect(href.first)
          .to eql(api_v3_paths.capabilities)

        expect(Rack::Utils.parse_nested_query(href.last))
          .to eql(expected_path_params.merge(overrides))
      end

      let(:filters) do
        [{ 'principal' => {
          'operator' => '=',
          'values' => [other_user.id.to_s]
        } }]
      end
      let(:path) { "#{api_v3_paths.path_for(:capabilities, filters: filters, sort_by: [%i(id asc)])}&pageSize=2&offset=2" }

      it 'returns a slice of the visible memberships' do
        expect(subject.body)
          .to be_json_eql('Collection'.to_json)
          .at_path('_type')

        expect(subject.body)
          .to be_json_eql('6')
          .at_path('total')

        expect(subject.body)
          .to be_json_eql('2')
          .at_path('count')

        expect(subject.body)
          .to be_json_eql("users/create/g-#{other_user.id}".to_json)
          .at_path('_embedded/elements/1/id')
      end

      it 'includes links for self and jumping' do
        expect_self_link('self')
        expect_self_link('jumpTo', 'offset' => '{offset}')
        expect_self_link('changeSize', 'pageSize' => '{size}')
        expect_self_link('previousByOffset', 'offset' => '1')
        expect_self_link('nextByOffset', 'offset' => '3')
      end
    end

    context 'when filtering by principal id (group)' do
      let(:filters) do
        [{ 'principalId' => {
          'operator' => '=',
          'values' => [group.id.to_s]
        } }]
      end
      let(:other_user) { group }
      let(:group) { FactoryBot.create(:group) }

      let(:setup) do
        other_user_member
      end

      it 'returns a collection of capabilities' do
        expect(subject.body)
          .to be_json_eql('Collection'.to_json)
          .at_path('_type')

        expect(subject.body)
          .to be_json_eql('3')
          .at_path('total')

        expect(subject.body)
          .to be_json_eql("memberships/create/p#{project.id}-#{other_user.id}".to_json)
          .at_path('_embedded/elements/0/id')
      end
    end

    context 'when filtering by principal id (placeholder user)' do
      let(:filters) do
        [{ 'principalId' => {
          'operator' => '=',
          'values' => [placeholder_user.id.to_s]
        } }]
      end
      let(:other_user) { placeholder_user }
      let(:placeholder_user) do
        FactoryBot.create(:placeholder_user)
      end

      let(:setup) do
        other_user_member
      end

      it 'returns a collection of capabilities' do
        expect(subject.body)
          .to be_json_eql('Collection'.to_json)
          .at_path('_type')

        expect(subject.body)
          .to be_json_eql('3')
          .at_path('total')

        expect(subject.body)
          .to be_json_eql("memberships/create/p#{project.id}-#{other_user.id}".to_json)
          .at_path('_embedded/elements/0/id')
      end
    end

    context 'when filtering by principal id (with a user) but with the not operator' do
      let(:current_user_permissions) { %i[manage_members] }
      let(:filters) do
        [{ 'principalId' => {
          'operator' => '!',
          'values' => [current_user.id.to_s]
        } }]
      end

      it 'responds 400 Bad Request' do
        expect(subject.status).to eq(400)
      end

      it 'communicates that either a context or a principal filter is required' do
        expect(subject.body)
          .to be_json_eql('Error'.to_json)
          .at_path('_type')

        expect(subject.body)
          .to be_json_eql('urn:openproject-org:api:v3:errors:InvalidQuery'.to_json)
          .at_path('errorIdentifier')
      end
    end

    context 'invalid filter' do
      let(:filters) do
        [{ 'bogus' => {
          'operator' => '=',
          'values' => [current_user.id.to_s]
        } }]
      end

      it 'returns 400' do
        expect(subject.status)
          .to be 400
      end

      it 'communicates the error message' do
        expect(subject.body)
          .to be_json_eql('Error'.to_json)
          .at_path('_type')

        expect(subject.body)
          .to be_json_eql('urn:openproject-org:api:v3:errors:InvalidQuery'.to_json)
          .at_path('errorIdentifier')
      end
    end

    context 'when filtering by project context' do
      let(:other_project) { FactoryBot.create(:project) }
      let(:other_user_other_member) do
        FactoryBot.create(:member,
                          principal: other_user,
                          roles: [role],
                          project: other_project)
      end

      let(:filters) do
        [{ 'context' => {
          'operator' => '=',
          'values' => ["p#{other_project.id}"]
        } }]
      end

      let(:setup) do
        other_user_global_member
        other_user_member
        other_user_other_member
      end

      it 'contains only the filtered capabilities in the response' do
        expect(subject.body)
          .to be_json_eql('3')
          .at_path('total')

        expect(subject.body)
          .to be_json_eql(api_v3_paths.project(other_project.id).to_json)
          .at_path('_embedded/elements/0/_links/context/href')
      end
    end

    context 'when filtering by global context' do
      let(:filters) do
        [{ 'context' => {
          'operator' => '=',
          'values' => ["g"]
        } }]
      end

      it 'contains only the filtered capabilities in the response' do
        expect(subject.body)
          .to be_json_eql('3')
          .at_path('total')

        expect(subject.body)
          .to be_json_eql(api_v3_paths.capabilities_contexts_global.to_json)
          .at_path('_embedded/elements/0/_links/context/href')
      end
    end

    context 'without permissions' do
      current_user do
        FactoryBot.create(:user)
      end

      let(:filters) do
        [{ 'context' => {
          'operator' => '=',
          'values' => ["g"]
        } }]
      end

      it 'is empty' do
        expect(subject.body)
          .to be_json_eql('0')
          .at_path('total')
      end
    end

    context 'when filtering by action' do
      let(:filters) do
        [{ 'action' => {
          'operator' => '=',
          'values' => ["memberships/create"]
        } },
         { 'principalId' => {
           'operator' => '=',
           'values' => [other_user.id.to_s]
         } }]
      end

      let(:setup) do
        other_user_member
      end

      it 'contains only the filtered capabilities in the response' do
        expect(subject.body)
          .to be_json_eql('1')
          .at_path('total')

        expect(subject.body)
          .to be_json_eql("memberships/create/p#{project.id}-#{other_user.id}".to_json)
          .at_path('_embedded/elements/0/id')
      end
    end
  end

  describe 'GET /api/v3/capabilities/:id' do
    let(:path) { api_v3_paths.capability("memberships/create/p#{project.id}-#{other_user.id}") }

    let(:setup) do
      other_user_member
    end

    before do
      setup

      get path
    end

    it 'returns 200 OK' do
      expect(subject.status)
        .to eql(200)
    end

    it 'returns the capability' do
      expect(subject.body)
        .to be_json_eql('Capability'.to_json)
        .at_path('_type')

      expect(subject.body)
        .to be_json_eql("memberships/create/p#{project.id}-#{other_user.id}".to_json)
        .at_path('id')
    end

    context 'if querying a non existing capability' do
      let(:path) { api_v3_paths.capability("foo/bar/p#{project.id}-#{other_user.id}") }

      it 'returns 404 NOT FOUND' do
        expect(subject.status)
          .to be 404
      end
    end

    context 'if querying with malformed id' do
      let(:path) { api_v3_paths.capability("foo/bar/baz-5") }

      it 'returns 404 NOT FOUND' do
        expect(subject.status)
          .to be 404
      end
    end

    context 'if querying for an invisible user' do
      current_user do
        FactoryBot.create(:user)
      end

      it 'returns 404 NOT FOUND' do
        expect(subject.status)
          .to be 404
      end
    end
  end
end