# frozen_string_literal: true

require 'spec_helper'

RSpec.describe BreadcrumbsHelper, feature_category: :navigation do
  let(:elements) do
    [
      %w[element1 http://test.host/link1 http://test.host/uploads/avatar1.png],
      %w[element2 http://test.host/link2 http://test.host/uploads/avatar2.png]
    ]
  end

  describe '#push_to_schema_breadcrumb' do
    let(:element_name) { 'BreadCrumbElement' }
    let(:link) { 'http://test.host/foo' }
    let(:breadcrumb_list) { helper.instance_variable_get(:@schema_breadcrumb_list) }

    subject { helper.push_to_schema_breadcrumb(element_name, link) }

    it 'enqueues element name, link' do
      subject

      aggregate_failures do
        expect(breadcrumb_list[0][:text]).to eq element_name
        expect(breadcrumb_list[0][:href]).to eq link
      end
    end
  end

  describe '#schema_breadcrumb_json' do
    subject { helper.schema_breadcrumb_json }

    it 'returns the breadcrumb schema in json format' do
      enqueue_breadcrumb_elements

      expected_result = {
        '@context' => 'https://schema.org',
        '@type' => 'BreadcrumbList',
        'itemListElement' => [
          {
            '@type' => 'ListItem',
            'position' => 1,
            'name' => elements[0][0],
            'item' => elements[0][1]
          },
          {
            '@type' => 'ListItem',
            'position' => 2,
            'name' => elements[1][0],
            'item' => elements[1][1]
          }
        ]
      }.to_json

      expect(subject).to eq expected_result
    end

    context 'when link is relative' do
      let(:link) { '/foo' }

      it 'converts the url into absolute' do
        add_to_breadcrumbs('no base', link)
        expect(Gitlab::Json.parse(subject)['itemListElement'][0]['item']).to eq "http://test.host#{link}"
      end
    end

    describe 'when link is invalid' do
      let(:link) { 'invalid://foo[]' }

      it 'returns the current url' do
        add_to_breadcrumbs('invalid', link)
        expect(Gitlab::Json.parse(subject)['itemListElement'][0]['item']).to eq 'http://test.host'
      end
    end

    describe 'when link is nil' do
      let(:link) { nil }

      it 'returns the current url' do
        add_to_breadcrumbs('nil', link)
        expect(Gitlab::Json.parse(subject)['itemListElement'][0]['item']).to eq 'http://test.host'
      end
    end

    context 'when extra breadcrumb element is added' do
      let(:extra_elements) do
        [
          %w[extra_element1 http://test.host/extra_link1],
          %w[extra_element2 http://test.host/extra_link2]
        ]
      end

      it 'include the extra elements before the last element' do
        enqueue_breadcrumb_elements

        extra_elements.each do |el|
          add_to_breadcrumbs(el[0], el[1])
        end

        expected_result = {
          '@context' => 'https://schema.org',
          '@type' => 'BreadcrumbList',
          'itemListElement' => [
            {
              '@type' => 'ListItem',
              'position' => 1,
              'name' => elements[0][0],
              'item' => elements[0][1]
            },
            {
              '@type' => 'ListItem',
              'position' => 2,
              'name' => extra_elements[0][0],
              'item' => extra_elements[0][1]
            },
            {
              '@type' => 'ListItem',
              'position' => 3,
              'name' => extra_elements[1][0],
              'item' => extra_elements[1][1]
            },
            {
              '@type' => 'ListItem',
              'position' => 4,
              'name' => elements[1][0],
              'item' => elements[1][1]
            }
          ]
        }.to_json

        expect(subject).to eq expected_result
      end
    end
  end

  describe '#breadcrumbs_as_json' do
    subject { helper.breadcrumbs_as_json }

    it 'is a JSON array of breadcrumb items incl their avatar' do
      enqueue_breadcrumb_elements

      expected_result = [
        { text: elements[0][0], href: elements[0][1], avatarPath: elements[0][2] },
        { text: elements[1][0], href: elements[1][1], avatarPath: elements[1][2] }
      ].to_json

      expect(subject).to eq expected_result
    end

    context 'without breadcrumb elements' do
      it 'is an empty JSON array' do
        expect(subject).to eq [].to_json
      end
    end
  end

  def enqueue_breadcrumb_elements
    elements.each do |el|
      helper.push_to_schema_breadcrumb(el[0], el[1], el[2])
    end
  end
end