# Progress: hosts

## What Works

### Project Foundation ✅ COMPLETE
- ✅ **uv project initialized**: Basic Python 3.13 project with uv configuration
- ✅ **Code quality setup**: ruff configured for linting and formatting
- ✅ **Memory bank complete**: All core documentation files created and populated
- ✅ **Architecture defined**: Clear layered architecture and design patterns established

### Phase 1: Foundation ✅ COMPLETE
- ✅ **Project structure**: Created proper `src/hosts/` package structure with core and tui modules
- ✅ **Dependencies**: Added textual, pytest, ruff and configured properly in pyproject.toml
- ✅ **Entry point**: Configured proper application entry point (`hosts` command)
- ✅ **Core models**: Implemented HostEntry and HostsFile data classes with full validation
- ✅ **Hosts parser**: Created comprehensive parser for reading/writing `/etc/hosts` files
- ✅ **Basic TUI**: Implemented main application with two-pane layout
- ✅ **File loading**: Successfully reads and parses existing hosts file
- ✅ **Entry display**: Shows hosts entries in left pane with proper formatting
- ✅ **Detail view**: Shows selected entry details in right pane
- ✅ **Navigation**: Keyboard navigation between entries working
- ✅ **Testing**: Comprehensive test suite with 42 passing tests
- ✅ **Code quality**: All linting checks passing

### Documentation
- ✅ **Project brief**: Comprehensive project definition and requirements
- ✅ **Product context**: User experience goals and problem definition
- ✅ **Technical context**: Technology stack and development setup
- ✅ **System patterns**: Architecture, design patterns, and implementation paths
- ✅ **Active context**: Current work focus and next steps

## What's Left to Build

### Phase 2: Enhanced Read-Only Features (Next)
- ❌ **Entry selection highlighting**: Visual feedback for selected entries
- ❌ **Sorting**: Sort entries by IP, hostname, or comments
- ❌ **Filtering**: Filter entries by active/inactive status
- ❌ **Search**: Find entries by hostname or IP
- ❌ **Help screen**: Proper modal help dialog
- ❌ **Status indicators**: Better visual distinction for active/inactive entries

### Phase 3: Edit Mode Foundation
- ❌ **Permission management**: Sudo request and management
- ❌ **Edit mode toggle**: Switch between read-only and edit modes
- ❌ **Entry activation**: Toggle entries active/inactive
- ❌ **Entry reordering**: Move entries up/down in the list
- ❌ **Entry editing**: Modify IP addresses, hostnames, comments
- ❌ **File backup**: Automatic backup before modifications

### Phase 4: Advanced Edit Features
- ❌ **Add new entries**: Create new host entries
- ❌ **Delete entries**: Remove host entries
- ❌ **Bulk operations**: Select and modify multiple entries
- ❌ **Validation**: Real-time validation of IP addresses and hostnames
- ❌ **Undo/Redo**: Command pattern implementation

### Phase 5: Advanced Features
- ❌ **DNS resolution**: Resolve hostnames to IP addresses
- ❌ **IP comparison**: Compare stored vs resolved IPs
- ❌ **CNAME support**: Store DNS names alongside IP addresses
- ❌ **Import/Export**: Support for different file formats
- ❌ **Configuration**: User preferences and settings

### Phase 6: Polish
- ❌ **Error handling**: Enhanced error handling and user feedback
- ❌ **Performance**: Optimization for large hosts files
- ❌ **Accessibility**: Screen reader support and keyboard accessibility
- ❌ **Documentation**: User manual and installation guide

## Current Status

### Development Stage
**Stage**: Phase 1 Complete - Foundation Established
**Progress**: 25% (Core functionality working)
**Next Milestone**: Enhanced read-only features

### Phase 1 Achievements
1. ✅ **Fully functional TUI**: Application successfully loads and displays hosts file
2. ✅ **Robust parsing**: Handles comments, inactive entries, IPv4/IPv6 addresses
3. ✅ **Clean architecture**: Well-structured codebase with separation of concerns
4. ✅ **Comprehensive testing**: 42 tests covering models and parser functionality
5. ✅ **Code quality**: All linting and formatting checks passing

### Immediate Next Steps
1. **Enhanced UI**: Improve visual feedback and entry highlighting
2. **Sorting/Filtering**: Add basic data manipulation features
3. **Help system**: Implement proper help modal
4. **Status improvements**: Better visual indicators for entry states

### Recent Accomplishments
- Successfully implemented complete Phase 1 foundation
- Created robust data models with validation
- Built comprehensive hosts file parser with comment preservation
- Developed functional TUI application with two-pane layout
- Established comprehensive testing framework
- Achieved clean code quality standards

## Technical Implementation Details

### Core Components Working
- **HostEntry**: Data class with IP/hostname validation, active/inactive state
- **HostsFile**: Container with entry management, sorting, and search capabilities
- **HostsParser**: File I/O with atomic writes, backup creation, permission checking
- **HostsManagerApp**: Textual-based TUI with reactive state management

### Test Coverage
- **Models**: 27 tests covering all data model functionality
- **Parser**: 15 tests covering file operations and edge cases
- **Coverage**: All core functionality thoroughly tested

### Code Quality
- **Linting**: All ruff checks passing
- **Type hints**: Comprehensive typing throughout codebase
- **Documentation**: Detailed docstrings and comments
- **Error handling**: Proper exception handling in core components

## Known Issues

### Current Limitations
- **Help system**: Currently shows status message instead of modal
- **Entry highlighting**: Basic selection without visual enhancement
- **No edit capabilities**: Read-only mode only (by design for Phase 1)
- **No sorting/filtering**: Basic display only

### Technical Debt
- **Help modal**: Need to implement proper screen for help
- **Visual polish**: Entry highlighting and status indicators need improvement
- **Error messages**: Could be more user-friendly
- **Performance**: Not yet optimized for very large hosts files

## Evolution of Project Decisions

### Confirmed Decisions
- **Python 3.13**: Excellent choice for modern features
- **Textual**: Perfect for rich TUI development
- **uv**: Fast and reliable package management
- **ruff**: Excellent code quality tooling
- **Dataclasses**: Clean and efficient for data models

### Architecture Validation
- **Layered approach**: Proven effective with clear separation
- **Parser design**: Robust handling of real-world hosts files
- **Reactive UI**: Textual's reactive system working well
- **Test-driven**: Comprehensive testing paying dividends

### Design Successes
- **Safety first**: Read-only default working as intended
- **File integrity**: Atomic operations and backup system solid
- **User experience**: Keyboard navigation intuitive
- **Code organization**: Package structure clean and maintainable

## Success Metrics Progress

### Completed Metrics ✅
- ✅ **Functional prototype**: TUI application fully working
- ✅ **File parsing**: Robust hosts file reading and writing
- ✅ **Code quality**: All quality checks passing
- ✅ **Test coverage**: Comprehensive test suite implemented
- ✅ **Architecture**: Clean, maintainable codebase structure

### Next Phase Metrics
- ❌ **Enhanced UX**: Improved visual feedback and interactions
- ❌ **Data manipulation**: Sorting and filtering capabilities
- ❌ **User testing**: Feedback on current interface
- ❌ **Performance benchmarks**: Testing with large hosts files

## Next Session Priorities

### Phase 2 Implementation
1. **Visual enhancements**: Improve entry highlighting and status indicators
2. **Sorting functionality**: Implement sort by IP, hostname, status
3. **Filtering system**: Add active/inactive filtering
4. **Help modal**: Create proper help screen
5. **Search capability**: Basic hostname/IP search

### Quality Improvements
1. **Error handling**: More user-friendly error messages
2. **Status feedback**: Better user feedback for operations
3. **Performance testing**: Test with large hosts files
4. **Documentation**: Update README with usage instructions

## Phase 1 Success Summary

Phase 1 has been **successfully completed** with all core objectives achieved:

- ✅ **Solid foundation**: Robust architecture and codebase
- ✅ **Working application**: Functional TUI that reads and displays hosts files
- ✅ **Quality standards**: Clean code with comprehensive testing
- ✅ **User experience**: Intuitive keyboard-driven interface
- ✅ **File safety**: Proper parsing with comment preservation

The project is ready to move into Phase 2 with enhanced read-only features.