# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  gem "sqlite3"
  gem 'rails'
  gem 'sprockets-rails'
end

require 'rails'
require "active_record/railtie"
require "action_controller/railtie"
require "action_view/railtie"
require "sprockets/railtie"
require "minitest/autorun"

class TestApp < Rails::Application; end

Rails.application.routes.draw do
  resources :parents
end

ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :parents, force: true do |t|
  end

  create_table :children, force: true do |t|
    t.integer :parent_id
  end

  create_table :grandchildren, force: true do |t|
    t.integer :child_id
  end
end

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
end

class Parent < ApplicationRecord
  has_many :children
  accepts_nested_attributes_for :children
end

class Child < ApplicationRecord
  belongs_to :parent
  has_many :grandchildren
  accepts_nested_attributes_for :grandchildren
end

class Grandchild < ApplicationRecord
  belongs_to :child
end


TEMPLATE = <<~ERB
<%= form_with model: parent do |f| %>
 <%= f.field_name :children_attributes, multiple: true %>
  <%= f.fields_for :children do |child_f| %>
     <%= child_f.field_name :grandchildren_attributes, multiple: true %>
  <% end %>
<% end %>
ERB

class ApplicationController < ActionController::Base
  include ActionDispatch::Routing::UrlFor
  include Rails.application.routes.url_helpers
end

class BugTest < Minitest::Test

  def setup
    @parent = Parent.new
    child = Child.new
    grandchild = Grandchild.new
    child.grandchildren << grandchild
    @parent.children << child
    @rendered = ApplicationController.renderer.render inline: TEMPLATE, locals: { parent: @parent }
  end

  def test_grandchildren_field_name
    assert_match('parent[children_attributes][0][grandchildren_attributes][]', @rendered)
  end
end