gem "rest_framework"

class ApiController < ApplicationController
  include RESTFramework::BaseControllerMixin

  # Setting up a paginator class here makes more sense than defining it on every child controller.
  self.paginator_class = RESTFramework::PageNumberPaginator

  # The page_size attribute doesn't exist on the `BaseControllerMixin`, but for child controllers
  # that include the `ModelControllerMixin`, they will inherit this attribute and will not overwrite
  # it.
  class_attribute(:page_size, default: 30)
end

class Api::RootController < ApiController
  self.extra_actions = {test: :get}

  def root
    render_api(
      {
        message: "Welcome to the API.",
        how_to_authenticate: <<~END.lines.map(&:strip).join(" "),
          You can use this API with your normal login session. Otherwise, you can insert your API
          key into a Bearer Authorization header, or into the URL parameters with the name
          `api_key`.
        END
      },
    )
  end

  def test
    render_api({message: "Hello, world!"})
  end
end

class Api::MoviesController < ApiController
  include RESTFramework::ModelControllerMixin

  self.fields = [:id, :name, :release_date, :enabled]
  self.extra_member_actions = {first: :get}

  def first
    # Always use the bang method, since the framework will rescue `RecordNotFound` and return a
    # sensible error response.
    render_api(self.get_records.first!)
  end

  def get_recordset
    return Movie.where(enabled: true)
  end
end

class Api::UsersController < ApiController
  include RESTFramework::ModelControllerMixin

  self.fields = {include: [:calculated_popularity], exclude: [:impersonation_token]}
end

Rails.application.routes.draw do
  # If you wanted to route actions from the `ApiController`, then you would use this:
  # rest_root :api  # Will find `api_controller` and route the `root` action to '/api'.

  namespace :api do
    rest_root  # Will route `Api::RootController#root` to '/' in this namespace ('/api').
    rest_resources :movies
    rest_resources :users
  end
end