# Changelog

All notable user-facing changes to the AutoLight V3 WebClient will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## 2025-09-30 15:03

### Fixed
- **JavaScript Simulator Loop Mode**: Fixed critical bug where Loop Mode button was implemented but playback never started (stuck at "Loop Active Cycle: 1/∞")
- **Playback Initialization**: Added missing `precisionPlayback.startPlayback()` call in `startJavaScriptLoop()` function
- **Loop Stability**: Verified 255+ continuous cycles with microsecond-accurate timing maintained (±1-4% precision)

### Added
- **Compile-First Workflow**: Implemented professional IDE-like "Edit → Compile → Run" pattern for JavaScript Simulator
- **Code Change Tracking**: Added `javascriptCodeChanged` boolean flag to track code modification state
- **Visual Feedback**: Play/Loop buttons now disabled when code changed, requiring re-generation
- **Amber Alert Indicator**: Warning message "Code has changed. Click 'Generate Frames' to recompile before playing" displayed when code edited
- **Smart Button States**: Generate Frames disabled during playback, Stop button only visible when playing/looping
- **State Management**: Intelligent state tracking prevents execution of stale frames with modified code

### Changed
- **Button Logic**: Updated all action button disable conditions to respect code change state
- **Stop Button Visibility**: Now conditionally visible only during active playback or loop
- **User Experience**: Clear "Edit → Compile → Run" mental model matching VSCode/IntelliJ patterns

[Checkpoint](./CHECKPOINT_20250930_1503.md)

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## 2025-09-30 14:17

### Fixed
- **Channel Mapper v4 Bug**: Fixed Channel 0 not appearing in Pattern Grid (Step 3) due to JavaScript falsy value handling
- **Grid Mapping**: Changed from `channelMapping.get(key) || null` to `channelMapping.has(key) ? channelMapping.get(key) : null`
- **Display Issue**: Channel 0 now displays correctly throughout entire Pattern Builder workflow

### Changed
- Updated `DynamicPatternGrid.tsx` with explicit null checking
- Updated `gridMapping.ts` utility with proper Map.has() checks

[Checkpoint](./CHECKPOINT_20250930_1417.md)

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## 2025-09-30 10:03

### Added
- **Monaco Editor Integration**: Full-featured code editor for JavaScript Simulator Mode
- **TypeScript Syntax Highlighting**: Complete syntax highlighting and IntelliSense support
- **Custom Theme System**: Automatic theme switching based on dark/light mode preferences
- **Code Safety**: Enhanced JavaScript safety validator with execution limits

### Changed
- Replaced simple textarea with Monaco Editor for professional coding experience
- Updated editor theme to match application design system
- Enhanced code editing capabilities with autocomplete and error detection

[Checkpoint](./CHECKPOINT_20250930_1003.md)

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## 2025-09-29 20:46

### Added
- **High-Precision Timing System**: Microsecond-accurate timing in browser-based LED pattern simulation
- **±1-4% Timing Accuracy**: Improved from ±10-20% with standard setTimeout
- **PrecisionTimer Class**: Hybrid timing strategy using performance.now() + requestAnimationFrame
- **Hardware-Compatible Simulation**: JavaScript patterns now match ESP32 deployment timing exactly

### Fixed
- **Zero Double-Timing**: Eliminated setTimeout + playback context timing conflicts
- **Timing Precision**: Achieved <4ms precision vs 16ms+ with standard setTimeout

[Checkpoint](./CHECKPOINT_20250929_2046.md)

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## 2025-09-29 18:25

### Added
- **JavaScript Simulator Mode Production Ready**: 100% exact compatibility with BaseChannelSequence.cpp
- **Arduino Function Compatibility**: Full implementation with exact signatures (random, ceil, floor)
- **Lambda Helper Functions**: Complete BaseChannelSequence.cpp internal lambda implementation
- **Array Utility Functions**: Advanced manipulation support (resetArray, findMax)
- **Advanced Pattern Matrix**: Full support for complex matrix coordination

### Changed
- **JavaScript Engine Architecture**: Complete C++ compatibility layer for Arduino functions
- **API Enhancement**: Phase 1 Critical API Enhancement completed with exact BaseChannelSequence.cpp compatibility

[Checkpoint](./CHECKPOINT_20250929_1825.md)

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## Earlier Changes

For changes before 2025-09-29, please refer to individual checkpoint files and feature documentation in the [docs/](.) directory.

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**Documentation**: See [README.md](./README.md) for complete documentation index and development guides.