bookstore/app/controllers/books_controller.rb

# frozen_string_literal: true

# Books controller
class BooksController < ApplicationController
  before_action :set_book, only: %i[show edit update add_to_cart]
  before_action :ensure_admin, only: %i[edit update]

  def index
    books = if current_user&.admin?
              Book.all
            else
              Book.published
            end
    @books = books.map { |book| BooksPresenter.new(book) }
  end

  def edit; end

  def update
    redirect_to '/books' if @book.update(book_params)
  end

  def add_to_cart
    @book = Book.find(params[:id])
    return unless @book.quantity.positive?

    current_user.books << @book
    @book.decrement!(:quantity)
    redirect_to '/books', notice: 'Book added to your cart'
  end

  def shopping_cart
    @books = current_user.books.map { |book| BooksPresenter.new(book) }
  end

  private

  def set_book
    @book = BooksPresenter.new(Book.find(params[:id]))
  end

  def book_params
    result = params.require(:book).permit(:title, :price, :published)
    result['price'] = result['price'].to_d * 100
    result
  end
end