require 'spec_helper'

describe Book do
  let(:book) { Organization.current.book }

  describe '#next_lesson_for' do
    let!(:chapter) { create(:chapter, lessons: [create(:lesson)]) }
    let(:fresh_user) { create(:user) }

    before { reindex_current_organization! }

    it { expect(book.next_lesson_for(nil)).to eq book.first_lesson }
    it { expect(book.next_lesson_for(fresh_user)).to eq book.first_lesson }
  end

  describe '#rebuild!' do
    let(:chapter_1) { build(:chapter, number: 10) }
    let(:chapter_2) { build(:chapter, number: 8) }

    let(:lesson_1) { create(:lesson) }
    let(:lesson_2) { create(:lesson) }
    let(:lesson_3) { create(:lesson) }

    let(:guide_1) { lesson_1.guide }
    let(:guide_2) { lesson_2.guide }
    let(:guide_3) { lesson_3.guide }

    context 'when chapter is rebuilt after book rebuilt' do
      before do
        book.description = '#foo'
        book.rebuild!([chapter_1, chapter_2])

        chapter_1.rebuild!([lesson_1, lesson_2])
        chapter_2.rebuild!([lesson_3])
      end

      it { expect(book.description).to eq '#foo' }
      it { expect(book.description_html).to eq "<h1>foo</h1>\n" }

      it { expect(Chapter.count).to eq 2 }
      it { expect(book.chapters).to eq [chapter_1, chapter_2] }
      it { expect(chapter_1.guides).to eq [guide_1, guide_2] }
      it { expect(chapter_2.guides).to eq [guide_3] }
      it { expect(chapter_1.number).to eq 1 }
      it { expect(chapter_2.number).to eq 2 }
    end

    context 'when some chapters are orphan' do
      let(:orphan_chapter) { build(:chapter, book: nil) }
      before do
        book.description = '#foo'
        book.rebuild!([chapter_1, orphan_chapter, chapter_2])

        chapter_1.rebuild!([lesson_1, lesson_2])
        chapter_2.rebuild!([lesson_3])
      end

      it { expect(book.description).to eq '#foo' }
      it { expect(book.description_html).to eq "<h1>foo</h1>\n" }

      it { expect(Chapter.count).to eq 3 }
      it { expect(book.chapters).to eq [chapter_1, orphan_chapter, chapter_2] }
      it { expect(chapter_1.guides).to eq [guide_1, guide_2] }
      it { expect(chapter_2.guides).to eq [guide_3] }
      it { expect(chapter_1.number).to eq 1 }
      it { expect(orphan_chapter.number).to eq 2 }
      it { expect(chapter_2.number).to eq 3 }
    end


    context 'when chapter is created before book rebuilt' do
      before do
        chapter_1.save!
        chapter_2.save!

        book.description = '#foo'
        book.rebuild!([chapter_1, chapter_2])

        chapter_1.rebuild!([lesson_1, lesson_2])
        chapter_2.rebuild!([lesson_3])
      end

      it { expect(book.description).to eq '#foo' }
      it { expect(book.description_html).to eq "<h1>foo</h1>\n" }

      it { expect(Chapter.count).to eq 2 }
      it { expect(book.chapters).to eq [chapter_1, chapter_2] }
      it { expect(chapter_1.guides).to eq [guide_1, guide_2] }
      it { expect(chapter_2.guides).to eq [guide_3] }
      it { expect(chapter_1.number).to eq 1 }
      it { expect(chapter_2.number).to eq 2 }
    end

    context 'when chapter is rebuilt before book rebuilt' do
      before do
        chapter_1.rebuild!([lesson_1, lesson_2])
        chapter_2.rebuild!([lesson_3])

        book.description = '#foo'
        book.rebuild!([chapter_1, chapter_2])
      end

      it { expect(book.description).to eq '#foo' }
      it { expect(book.description_html).to eq "<h1>foo</h1>\n" }

      it { expect(Chapter.count).to eq 2 }
      it { expect(book.chapters).to eq [chapter_1, chapter_2] }
      it { expect(chapter_1.number).to eq 1 }
      it { expect(chapter_2.number).to eq 2 }
      it { expect(chapter_1.guides).to eq [guide_1, guide_2] }
      it { expect(chapter_2.guides).to eq [guide_3] }
    end
  end
end