rentals_controller.rb

# frozen_string_literal: true

class RentalsController < ApplicationController
  def checkout
    rental = Rental.new(rental_params)
    rental.save

    if rental.movie && rental.customer
      rental.movie.available_inventory -= 1
      rental.movie.save
      rental.customer.movies_checked_out_count += 1
      rental.customer.save
      rental.due_date = rental.created_at + 7
    end

    if rental.save
      render json: rental.as_json(only: %i[customer_id movie_id]), status: :ok
    else
      render json: { errors: rental.errors.messages },
             status: :bad_request
    end
  end

  def checkin
    customer = Customer.find_by(id: rental_params[:customer_id])
    movie = Movie.find_by(id: rental_params[:movie_id])
    rental = Rental.find_by(customer_id: rental_params[:customer_id], movie_id: rental_params[:movie_id])
    if customer && movie && rental
      rental.destroy
      movie.update(available_inventory: movie.available_inventory + 1)
      customer.update(movies_checked_out_count: customer.movies_checked_out_count - 1)
      render json: { status: :ok }
    else
      render json: { errors: { rental: ["Rental not found for customer ID #{rental_params[:customer_id]}, and movie ID #{rental_params[:movie_id]}"] } },
             status: :not_found
    end
  end

  private

  def rental_params
    params.permit(:customer_id, :movie_id)
  end
end