RSpec.describe 'ROM repository' do
  include_context 'database'
  include_context 'relations'
  include_context 'seeds'
  include_context 'structs'

  it 'loads a single relation' do
    expect(repo.all_users.to_a).to match_array([jane, joe])
  end

  it 'can be used with a custom mapper' do
    expect(repo.all_users_as_users.to_a).to match_array([
      Test::Models::User.new(jane),
      Test::Models::User.new(joe)
    ])
  end

  it 'loads a relation by an association' do
    expect(repo.tasks_for_users(repo.all_users)).to match_array([jane_task, joe_task])
  end

  it 'loads a combine relation with one parent' do
    task = repo.task_with_user.first

    expect(task.id).to eql(task_with_user.id)
    expect(task.title).to eql(task_with_user.title)
    expect(task.user.id).to eql(task_with_user.user.id)
    expect(task.user.name).to eql(task_with_user.user.name)
  end

  it 'loads a combine relation with one parent with custom tuple key' do
    expect(repo.task_with_owner.first).to eql(task_with_owner)
  end

  it 'loads a combined relation with many children' do
    expect(repo.users_with_tasks.to_a).to match_array([jane_with_tasks, joe_with_tasks])
  end

  it 'loads a combined relation with one child' do
    expect(repo.users_with_task.to_a).to match_array([jane_with_task, joe_with_task])
  end

  it 'loads a combined relation with one child restricted by given criteria' do
    expect(repo.users_with_task_by_title('Joe Task').to_a).to match_array([
      jane_without_task, joe_with_task
    ])
  end

  it 'loads nested combined relations' do
    expect(repo.users_with_tasks_and_tags.first.to_h).to eql(user_with_task_and_tags.to_h)
  end

  it 'loads a wrapped relation' do
    expect(repo.tag_with_wrapped_task.first).to eql(tag_with_task)
  end

  it 'loads an aggregate via custom fks' do
    jane = repo.aggregate(many: repo.posts).where(name: 'Jane').one

    expect(jane.posts.size).to be(1)
    expect(jane.posts.first.title).to eql('Hello From Jane')
  end

  it 'loads an aggregate via assoc name' do
    jane = repo.aggregate(:posts).where(name: 'Jane').one

    expect(jane.posts.size).to be(1)
    expect(jane.posts.first.title).to eql('Hello From Jane')
  end

  it 'loads an aggregate with multiple associations' do
    jane = repo.aggregate(:posts, :labels).where(name: 'Jane').one

    expect(jane.posts.size).to be(1)
    expect(jane.posts.first.title).to eql('Hello From Jane')

    expect(jane.labels.size).to be(2)
    expect(jane.labels[0].name).to eql('red')
    expect(jane.labels[1].name).to eql('blue')
  end

  it 'loads a parent via custom fks' do
    post = repo.posts.combine(:author).where(title: 'Hello From Jane').one

    expect(post.title).to eql('Hello From Jane')
    expect(post.author.name).to eql('Jane')
  end

  it 'loads aggregate through many-to-many via custom options' do
    post = repo.posts
      .combine_children(many: repo.labels)
      .where(title: 'Hello From Jane')
      .one

    expect(post.title).to eql('Hello From Jane')
    expect(post.labels.size).to be(2)
    expect(post.labels.map(&:name)).to eql(%w(red blue))
  end

  it 'loads aggregate through many-to-many association' do
    post = repo.posts.combine(:labels).where(title: 'Hello From Jane').one

    expect(post.title).to eql('Hello From Jane')
    expect(post.labels.size).to be(2)
    expect(post.labels.map(&:name)).to eql(%w(red blue))
  end

  context 'not common naming conventions' do
    it 'still loads nested relations' do
      comments = comments_repo.comments_with_likes.to_a

      expect(comments.size).to be(2)
      expect(comments[0].author).to eql('Jane')
      expect(comments[0].likes[0].author).to eql('Joe')
      expect(comments[0].likes[1].author).to eql('Anonymous')
      expect(comments[1].author).to eql('Joe')
      expect(comments[1].likes[0].author).to eql('Jane')
    end

    it 'loads nested relations by association name' do
      comments = comments_repo.comments_with_emotions.to_a

      expect(comments.size).to be(2)
      expect(comments[0].emotions[0].author).to eql('Joe')
      expect(comments[0].emotions[1].author).to eql('Anonymous')
    end
  end

  context 'with a table without columns' do
    before { conn.create_table(:dummy) unless conn.table_exists?(:dummy) }

    it 'does not fail with a weird error when a relation does not have attributes' do
      configuration.relation(:dummy)

      repo = Class.new(ROM::Repository[:dummy]).new(rom)
      expect(repo.dummy.to_a).to eql([])
    end
  end
end