AppleHillsProduction/CHANGELOG.md

AppleHills - Interactables Refactor & Save System Integration

🎯 Overview

Major refactoring of the interaction system and full integration of save/load functionality across the game. This includes architecture improvements, asset cleanup, and comprehensive state persistence.

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🔧 Core Systems

Interactables Architecture Refactor

• Converted composition to inheritance - Moved from component-based to class-based interactables
• Created InteractableBase abstract base class with common functionality
• Specialized child classes: Pickup, ItemSlot, LevelSwitch, MinigameSwitch, CombinationItem, OneClickInteraction
• Unified interaction flow - All interactables now share consistent behavior patterns
• Custom inspector - New collapsible inspector UI for better editor experience

📚 Documentation: See docs/Interaction_System_Refactoring_Analysis.md

Save/Load System Integration

• Implemented ISaveParticipant interface for all stateful objects
• SaveableInteractable base class - Abstract base for all save-enabled interactables
• Bilateral restoration pattern - Elegant timing-independent state restoration
• Integrated systems:
  • ✅ Interactables (Pickups, ItemSlots, Switches)
  • ✅ Player & Follower positions and held items
  • ✅ Puzzle system state (completed/unlocked steps)
  • ✅ State machines (custom SaveableStateMachine wrapper)
  • ✅ Card collection progress

📚 Documentation:

• docs/SaveLoadSystem_Implementation_Complete.md
• docs/bilateral_restoration_implementation.md
• docs/puzzle_save_load_proposal.md
• docs/state_machine_save_load_FINAL_SUMMARY.md

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🧹 Asset & Scene Cleanup

Prefab Organization

• Removed placeholder files from Characters, Levels, UI, and Minigames folders
• Consolidated Environment prefabs - Moved items out of Placeholders subfolder into main Environment folder
• Moved Item prefabs - Organized items from PrefabsPLACEHOLDER into proper Items folder
• Updated prefab references - All scene references updated to new locations

Scene Updates

• Quarry scene - Major updates and cleanup
  • Saved multiple working versions (Quarry, Quarry_Fixed, Quarry_OLD)
  • Added proper lighting data
  • Updated all interactable components to new architecture
• Test scenes - Updated MichalTesting_ItemsPuzzles to new interaction system

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🛠️ Developer Tools

Migration & Cleanup Tools

• StateMachineMigrationTool - Automated migration from base StateMachine to SaveableStateMachine
• RemoveInteractableBaseComponents - Cleanup tool for removing old abstract Interactable references
• RemoveOldInteractableReferences - Scene cleanup for refactored components
• CardSystemTesterWindow - New testing window for card system development

Editor Improvements

• InteractableEditor - Custom inspector with collapsible sections for base + child properties
• Updated ItemPrefabEditor and PrefabCreatorWindow** for new architecture

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📊 Statistics

• 159 files changed
• ~975k insertions, ~10k deletions (massive scene file updates)
• 13 new documentation files covering implementation details
• ~2k lines of new production code (excluding scene data)

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🎨 Key Features

Bilateral Restoration Pattern

Solved complex timing issues with a simple elegant solution:

• Both Pickup and Follower attempt to restore their relationship
• First to succeed claims ownership
• No callbacks, no queues, no race conditions

State Machine Integration

• Custom SaveableStateMachine wrapper around Pixelplacement's StateMachine
• Saves state IDs instead of references
• Restores directly to target state without triggering transitional logic
• Migration tool converts existing instances

Puzzle System Persistence

• String-based step tracking (timing-independent)
• Pending registration pattern for late-loading objectives
• Supports both pre-placed and dynamically created puzzle elements

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🚀 What's Next

The save system foundation is complete and tested. Future work:

• Additional state machines integration
• More complex puzzle element support
• Save slot management UI
• Auto-save functionality

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📝 Notes

All internal implementation docs have been cleaned up. Key architectural documentation remains in the docs/ folder for future reference.