# frozen_string_literal: true

require 'spec_helper'

RSpec.describe BulkImports::Entity, type: :model do
  describe 'associations' do
    it { is_expected.to belong_to(:bulk_import).required }
    it { is_expected.to belong_to(:parent) }
    it { is_expected.to belong_to(:group) }
    it { is_expected.to belong_to(:project) }
  end

  describe 'validations' do
    it { is_expected.to validate_presence_of(:source_type) }
    it { is_expected.to validate_presence_of(:source_full_path) }
    it { is_expected.to validate_presence_of(:destination_name) }
    it { is_expected.to validate_presence_of(:destination_namespace) }

    it { is_expected.to define_enum_for(:source_type).with_values(%i[group_entity project_entity]) }

    context 'when associated with a group and project' do
      it 'is invalid' do
        entity = build(:bulk_import_entity, group: build(:group), project: build(:project))

        expect(entity).not_to be_valid
        expect(entity.errors).to include(:project, :group)
      end
    end

    context 'when not associated with a group or project' do
      it 'is valid' do
        entity = build(:bulk_import_entity, group: nil, project: nil)

        expect(entity).to be_valid
      end
    end

    context 'when associated with a group and no project' do
      it 'is valid as a group_entity' do
        entity = build(:bulk_import_entity, :group_entity, group: build(:group), project: nil)

        expect(entity).to be_valid
      end

      it 'is invalid as a project_entity' do
        entity = build(:bulk_import_entity, :project_entity, group: build(:group), project: nil)

        expect(entity).not_to be_valid
        expect(entity.errors).to include(:group)
      end
    end

    context 'when associated with a project and no group' do
      it 'is valid' do
        entity = build(:bulk_import_entity, :project_entity, group: nil, project: build(:project))

        expect(entity).to be_valid
      end

      it 'is invalid as a project_entity' do
        entity = build(:bulk_import_entity, :group_entity, group: nil, project: build(:project))

        expect(entity).not_to be_valid
        expect(entity.errors).to include(:project)
      end
    end

    context 'when the parent is a group import' do
      it 'is valid' do
        entity = build(:bulk_import_entity, parent: build(:bulk_import_entity, :group_entity))

        expect(entity).to be_valid
      end
    end

    context 'when the parent is a project import' do
      it 'is invalid' do
        entity = build(:bulk_import_entity, parent: build(:bulk_import_entity, :project_entity))

        expect(entity).not_to be_valid
        expect(entity.errors).to include(:parent)
      end
    end

    context 'validate destination namespace of a group_entity' do
      it 'is invalid if destination namespace is the source namespace' do
        group_a = create(:group, path: 'group_a')

        entity = build(
          :bulk_import_entity,
          :group_entity,
          source_full_path: group_a.full_path,
          destination_namespace: group_a.full_path
        )

        expect(entity).not_to be_valid
        expect(entity.errors).to include(:destination_namespace)
      end

      it 'is invalid if destination namespace is a descendant of the source' do
        group_a = create(:group, path: 'group_a')
        group_b = create(:group, parent: group_a, path: 'group_b')

        entity = build(
          :bulk_import_entity,
          :group_entity,
          source_full_path: group_a.full_path,
          destination_namespace: group_b.full_path
        )

        expect(entity).not_to be_valid
        expect(entity.errors).to include(:destination_namespace)
      end
    end
  end

  describe "#update_tracker_for" do
    let(:entity) { create(:bulk_import_entity) }

    it "inserts new tracker when it does not exist" do
      expect do
        entity.update_tracker_for(relation: :relation, has_next_page: false)
      end.to change(BulkImports::Tracker, :count).by(1)

      tracker = entity.trackers.last

      expect(tracker.relation).to eq('relation')
      expect(tracker.has_next_page).to eq(false)
      expect(tracker.next_page).to eq(nil)
    end

    it "updates the tracker if it already exist" do
      create(
        :bulk_import_tracker,
        relation: :relation,
        has_next_page: false,
        entity: entity
      )

      expect do
        entity.update_tracker_for(relation: :relation, has_next_page: true, next_page: 'nextPage')
      end.not_to change(BulkImports::Tracker, :count)

      tracker = entity.trackers.last

      expect(tracker.relation).to eq('relation')
      expect(tracker.has_next_page).to eq(true)
      expect(tracker.next_page).to eq('nextPage')
    end
  end

  describe "#has_next_page?" do
    it "queries for the given relation if it has more pages to be fetched" do
      entity = create(:bulk_import_entity)
      create(
        :bulk_import_tracker,
        relation: :relation,
        has_next_page: false,
        entity: entity
      )

      expect(entity.has_next_page?(:relation)).to eq(false)
    end
  end

  describe "#next_page_for" do
    it "queries for the next page of the given relation" do
      entity = create(:bulk_import_entity)
      create(
        :bulk_import_tracker,
        relation: :relation,
        has_next_page: false,
        next_page: 'nextPage',
        entity: entity
      )

      expect(entity.next_page_for(:relation)).to eq('nextPage')
    end
  end
end