# Generated from
# rails g scaffold User first_name middle_name last_name favorite_pizza favorite_ice_cream favorite_sandwich pet_count:integer pet_name 

class User < ApplicationRecord
  enum form_steps: {
    names: [:first_name, :middle_name, :last_name],
    foods: [:favorite_pizza, :favorite_ice_cream, :favorite_sandwich],
    pets: [:pet_count, :pet_name]
  }
  attr_accessor :form_step

  with_options if: -> { required_for_step?(:names) } do
    validates :first_name, presence: true, length: { minimum: 2, maximum: 20}
    validates :last_name, presence: true, length: { minimum: 2, maximum: 20}
    validates :middle_name, length: { maximum: 20 }
  end

  with_options if: -> { required_for_step?(:foods) } do
    # Foods info is all optional
  end

  with_options if: -> { required_for_step?(:pets) } do
    validates :pet_count, presence: true
    validates :pet_name, presence: true, length: { minimum: 2, maximum: 20}
  end

  def required_for_step?(step)
    # All fields are required if no form step is present
    return true if form_step.nil?
  
    # All fields from previous steps are required
    ordered_keys = self.class.form_steps.keys.map(&:to_sym)
    !!(ordered_keys.index(step) <= ordered_keys.index(form_step))
  end
end

resources :users do 
  resources :steps, only: [:show, :update], controller: 'steps_controllers/user_steps'
end

class UsersController < ApplicationController
  before_action :set_user, only: %i[ show edit update destroy ]

  # GET /users or /users.json
  def index
    @users = User.all
  end

  # GET /users/1 or /users/1.json
  def show
  end

  # GET /users/new
  def new
    @user = User.new
    @user.save! validate: false                                         # Only non-vanilla-Rails code here
    redirect_to user_step_path(@user, User.form_steps.keys.first)       # Only non-vanilla-Rails code here
  end

  # GET /users/1/edit
  def edit
  end

  # POST /users or /users.json
  def create
    @user = User.new(user_params)

    respond_to do |format|
      if @user.save
        format.html { redirect_to @user, notice: "User was successfully created." }
        format.json { render :show, status: :created, location: @user }
      else
        format.html { render :new, status: :unprocessable_entity }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /users/1 or /users/1.json
  def update
    respond_to do |format|
      if @user.update(user_params)
        format.html { redirect_to @user, notice: "User was successfully updated." }
        format.json { render :show, status: :ok, location: @user }
      else
        format.html { render :edit, status: :unprocessable_entity }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /users/1 or /users/1.json
  def destroy
    @user.destroy
    respond_to do |format|
      format.html { redirect_to users_url, notice: "User was successfully destroyed." }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_user
      @user = User.find(params[:id])
    end

    # Only allow a list of trusted parameters through.
    def user_params
      params.require(:user).permit([ :first_name, :last_name, :middle_name, 
        :favorite_pizza, :favorite_ice_cream, :favorite_sandwich, :email, 
        :pet_count, :pet_name ])
    end
end

module StepsControllers
  class UserStepsController < ApplicationController
    include Wicked::Wizard

    steps *User.form_steps.keys

    def show
      @user = User.find(params[:user_id])
      render_wizard
    end

    def update
      @user = User.find(params[:user_id])
      # Use #assign_attributes since render_wizard runs a #save for us
      @user.assign_attributes user_params
      render_wizard @user
    end

    private

    def user_params
      params.require(:user).permit(User.form_steps[step]).merge(form_step: step.to_sym)
    end

    def finish_wizard_path
      user_path(@user)
    end
  end
end

<%= form_with model: @user, url: wizard_path, data: { turbo: false } do |f| %>
  <% if f.object.errors.any? %>
    <div class="error_messages">
      <% f.object.errors.full_messages.each do |error| %>
        <p><%= error %></p>
      <% end %>
    </div>
  <% end %>

  <fieldset>
    <legend>User's Names</legend>

    <div>
      <%= f.label :first_name %>
      <%= f.text_field :first_name %>
    </div>

    <div>
      <%= f.label :middle_name %>
      <%= f.text_field :middle_name %>
    </div>

    <div>
      <%= f.label :last_name %>
      <%= f.text_field :last_name %>
    </div>

    <br/>

    <div>
      <%= link_to 'Nevermind', users_path %>
      <%= f.submit 'Next Step' %>
    </div>
  </fieldset>
<% end %>

<%= form_with model: @user, url: wizard_path, data: { turbo: false } do |f| %>
  <% if f.object.errors.any? %>
    <div class="error_messages">
      <% f.object.errors.full_messages.each do |error| %>
        <p><%= error %></p>
      <% end %>
    </div>
  <% end %>

  <fieldset>
    <legend>User's Favorite Foods</legend>

    <div>
      <%= f.label :favorite_pizza %>
      <%= f.text_field :favorite_pizza %>
    </div>

    <div>
      <%= f.label :favorite_ice_cream %>
      <%= f.text_field :favorite_ice_cream %>
    </div>

    <div>
      <%= f.label :favorite_sandwich %>
      <%= f.text_field :favorite_sandwich %>
    </div>

    <p>
      These fields are optional so we can add a 'skip' button
    </p>

    <div>
      <%= link_to 'Previous Step', previous_wizard_path %>
      <%= f.submit 'Next Step' %>
      <%= link_to 'Skip', next_wizard_path %>
    </div>
  </fieldset>
<% end %>

<%= form_with model: @user, url: wizard_path, data: { turbo: false } do |f| %>
  <% if f.object.errors.any? %>
    <div class="error_messages">
      <% f.object.errors.full_messages.each do |error| %>
        <p><%= error %></p>
      <% end %>
    </div>
  <% end %>

  <fieldset>
    <legend>User's Pet Info</legend>

    <div>
      <%= f.label :pet_count %>
      <%= f.text_field :pet_count %>
    </div>

    <div>
      <%= f.label :pet_name %>
      <%= f.text_field :pet_name %>
    </div>

    <br/>

    <div>
      <%= link_to 'Previous Step', previous_wizard_path %>
      <%= f.submit 'Complete' %>
    </div>
  </fieldset>
<% end %>