Add logging for alt style changes

There's something fishy going on with alt style IDs perhaps being reused? I want logs to be able to potentially track this down later on…

app/models/pet/modeling_snapshot.rb

@@ -52,12 +52,42 @@ class Pet::ModelingSnapshot
 
       id = @custom_pet[:alt_style].to_i
       AltStyle.find_or_initialize_by(id:).tap do |alt_style|
+        pet_name = @custom_pet[:name]
+
+        # Capture old asset IDs before assignment
+        old_asset_ids = alt_style.swf_assets.map(&:remote_id).sort
+
+        # Assign new attributes and assets
+        new_asset_ids = alt_style_assets.map(&:remote_id).sort
         alt_style.assign_attributes(
           color_id: @custom_pet[:alt_color].to_i,
           species_id: @custom_pet[:species_id].to_i,
           body_id: @custom_pet[:body_id].to_i,
           swf_assets: alt_style_assets,
         )
+
+        # Log the modeling event using Rails' change tracking
+        if alt_style.new_record?
+          Rails.logger.info "[Alt Style Modeling] Created alt style " \
+            "ID=#{id} for pet=#{pet_name}: " \
+            "species_id=#{alt_style.species_id}, " \
+            "color_id=#{alt_style.color_id}, " \
+            "body_id=#{alt_style.body_id}, " \
+            "asset_ids=#{new_asset_ids.inspect}"
+        elsif alt_style.changes.any? || old_asset_ids != new_asset_ids
+          changes = []
+          changes << "species_id: #{alt_style.species_id_was} -> #{alt_style.species_id}" if alt_style.species_id_changed?
+          changes << "color_id: #{alt_style.color_id_was} -> #{alt_style.color_id}" if alt_style.color_id_changed?
+          changes << "body_id: #{alt_style.body_id_was} -> #{alt_style.body_id}" if alt_style.body_id_changed?
+          changes << "asset_ids: #{old_asset_ids.inspect} -> #{new_asset_ids.inspect}" if old_asset_ids != new_asset_ids
+
+          Rails.logger.warn "[Alt Style Modeling] Updated alt style " \
+            "ID=#{id} for pet=#{pet_name}. " \
+            "CHANGED: #{changes.join(', ')}"
+        else
+          Rails.logger.info "[Alt Style Modeling] Loaded alt style " \
+            "ID=#{id} for pet=#{pet_name} (no changes)"
+        end
       end
     end
   end

spec/models/pet_spec.rb

@@ -551,6 +551,17 @@ RSpec.describe Pet, type: :model do
           it("has no thumbnail yet") { expect(alt_style.thumbnail_url?).to be false }
           it("is saved when saving the pet") { pet.save!; should be_persisted }
 
+          it "logs creation of new alt style" do
+            expect(Rails.logger).to receive(:info).with(
+              a_string_matching(/\[Alt Style Modeling\] Created alt style ID=87458 for pet=Majal_Kita/)
+                .and(matching(/species_id=20/))
+                .and(matching(/color_id=62/))
+                .and(matching(/body_id=378/))
+                .and(matching(/asset_ids=\[56223\]/))
+            )
+            pet.alt_style
+          end
+
           describe "its assets" do
             subject(:assets) { alt_style.swf_assets }
             let(:asset_ids) { assets.map(&:remote_id) }
@@ -588,6 +599,13 @@ RSpec.describe Pet, type: :model do
               new_pet.save!; expect(alt_style.previous_changes).to be_empty
             end
 
+            it "logs re-modeling without changes" do
+              expect(Rails.logger).to receive(:info).with(
+                a_string_matching(/\[Alt Style Modeling\] Loaded alt style ID=87458 for pet=Majal_Kita \(no changes\)/)
+              )
+              new_pet.alt_style
+            end
+
             describe "its assets" do
               subject(:assets) { alt_style.swf_assets }
 
@@ -599,6 +617,37 @@ RSpec.describe Pet, type: :model do
             end
           end
         end
+
+        context "when an alt style with the same ID but different attributes already exists" do
+          before do
+            Pet.load("Blue_Jetsam").save!
+            # Create an alt style with ID 87458 but different attributes
+            # (simulating Neopets reusing an ID)
+            wrong_color = Color.find_by_name!("Blue")
+            wrong_species = Species.find_by_name!("Acara")
+            AltStyle.create!(
+              id: 87458,
+              color_id: wrong_color.id,
+              species_id: wrong_species.id,
+              body_id: 999,
+              thumbnail_url: "http://example.com/wrong.png"
+            )
+          end
+
+          subject(:pet) { Pet.load("Majal_Kita") }
+
+          it "logs a warning about updating existing alt style" do
+            expect(Rails.logger).to receive(:warn).with(
+              a_string_matching(/\[Alt Style Modeling\] Updated alt style ID=87458 for pet=Majal_Kita/)
+                .and(matching(/CHANGED:/))
+                .and(matching(/species_id: 1 -> 20/))
+                .and(matching(/color_id: 8 -> 62/))
+                .and(matching(/body_id: 999 -> 378/))
+                .and(matching(/asset_ids: \[\] -> \[56223\]/))
+            )
+            pet.alt_style
+          end
+        end
       end
     end