# VNC Agent Bridge - Python Package Development Plan

## Project Overview

A comprehensive, open-source Python package that provides high-level abstractions for AI agents to interact with VNC (Virtual Network Computing) interfaces. The package will support mouse control, keyboard input, scrolling, and optional delays for all operations.

**Project Metadata:**
- **Package Name:** `vnc-agent-bridge`
- **License:** MIT
- **Python Version:** 3.8+
- **Type:** Open Source
- **Quality Standards:** Type-checked with mypy, tested with pytest

---

## Table of Contents

1. [Phase 1: Project Setup & Architecture](#phase-1-project-setup--architecture)
2. [Phase 2: Core Functionality Implementation](#phase-2-core-functionality-implementation)
3. [Phase 3: Testing & Type Checking](#phase-3-testing--type-checking)
4. [Phase 4: Documentation & Polish](#phase-4-documentation--polish)
5. [Deliverables Checklist](#deliverables-checklist)

---

## Phase 1: Project Setup & Architecture

### 1.1 Project Structure Setup

**Objectives:**
- Create a proper Python package structure following best practices
- Set up development tools and configuration files
- Initialize version control and documentation

**Tasks:**
- [ ] Create package directory structure
  - [ ] `vnc_agent_bridge/` - Main package directory
  - [ ] `vnc_agent_bridge/__init__.py` - Package initialization
  - [ ] `vnc_agent_bridge/core/` - Core functionality
  - [ ] `vnc_agent_bridge/types/` - Type definitions
  - [ ] `vnc_agent_bridge/exceptions/` - Custom exceptions
  - [ ] `tests/` - Test suite
  - [ ] `docs/` - Documentation
  
- [ ] Create configuration files
  - [ ] `pyproject.toml` - Project metadata and dependencies
  - [ ] `setup.py` - Package setup configuration
  - [ ] `MANIFEST.in` - Manifest for package distribution
  - [ ] `.gitignore` - Git ignore patterns
  - [ ] `mypy.ini` - MyPy configuration
  - [ ] `pytest.ini` - Pytest configuration
  - [ ] `tox.ini` - Tox configuration for testing

- [ ] Create documentation files
  - [ ] `README.md` - Project overview and quick start
  - [ ] `LICENSE` - MIT license
  - [ ] `CONTRIBUTING.md` - Contribution guidelines
  - [ ] `CHANGELOG.md` - Version history

### 1.2 Architecture Design

**Objectives:**
- Design class hierarchy and API structure
- Define type system and protocols
- Plan module organization

**Architecture Overview:**

```
VNCAgentBridge (Main Facade)
├── MouseController
│   ├── click(button, delay=0)
│   ├── double_click(button, delay=0)
│   ├── move_to(x, y, delay=0)
│   ├── drag_to(x, y, duration=1.0, delay=0)
│   └── get_position() -> Tuple[int, int]
├── KeyboardController
│   ├── type_text(text, delay=0)
│   ├── press_key(key, delay=0)
│   ├── hotkey(*keys, delay=0)
│   ├── keydown(key, delay=0)
│   └── keyup(key, delay=0)
├── ScrollController
│   ├── scroll_up(amount, delay=0)
│   ├── scroll_down(amount, delay=0)
│   └── scroll_to(x, y, delay=0)
└── VNCConnection (Low-level protocol handling)
```

**Tasks:**
- [ ] Define type definitions
  - [ ] Position type (x, y coordinates)
  - [ ] Button enums (LEFT, RIGHT, MIDDLE)
  - [ ] Key codes and key names
  - [ ] Scroll direction enum
  
- [ ] Create exception hierarchy
  - [ ] `VNCException` (base)
  - [ ] `VNCConnectionError`
  - [ ] `VNCTimeoutError`
  - [ ] `VNCInputError`
  
- [ ] Design API interfaces
  - [ ] Define method signatures
  - [ ] Plan delay mechanism
  - [ ] Plan error handling strategy

---

## Phase 2: Core Functionality Implementation

### 2.1 Mouse Controller

**Objectives:**
- Implement comprehensive mouse control functionality
- Support all mouse operations with optional delays

**Tasks:**
- [ ] Implement `MouseController` class
  - [ ] `left_click(x=None, y=None, delay=0)` - Left click at position or current
  - [ ] `right_click(x=None, y=None, delay=0)` - Right click at position or current
  - [ ] `double_click(x=None, y=None, delay=0)` - Double click
  - [ ] `move_to(x, y, delay=0)` - Move cursor to position
  - [ ] `drag_to(x, y, duration=1.0, delay=0)` - Drag from current to position
  - [ ] `get_position() -> Tuple[int, int]` - Get current cursor position
  - [ ] `_apply_delay(delay)` - Apply optional delay
  
- [ ] Handle VNC protocol details
  - [ ] Button mask management (left=0, middle=1, right=2)
  - [ ] Position tracking
  - [ ] Smooth dragging with multiple events

### 2.2 Keyboard Controller

**Objectives:**
- Implement comprehensive keyboard input functionality
- Support text typing, key pressing, and hotkeys

**Tasks:**
- [ ] Implement `KeyboardController` class
  - [ ] `type_text(text, delay=0)` - Type text string character by character
  - [ ] `press_key(key, delay=0)` - Press and release single key
  - [ ] `hotkey(*keys, delay=0)` - Press multiple keys (Ctrl+C, etc.)
  - [ ] `keydown(key, delay=0)` - Press and hold key
  - [ ] `keyup(key, delay=0)` - Release key
  - [ ] `_apply_delay(delay)` - Apply optional delay
  
- [ ] Key code mapping
  - [ ] Create X11 keysym mapping (or target platform keys)
  - [ ] Support both key names and key codes
  - [ ] Handle special keys (Enter, Tab, Escape, etc.)

### 2.3 Scroll Controller

**Objectives:**
- Implement mouse wheel scrolling functionality
- Support directional scrolling and positioning

**Tasks:**
- [ ] Implement `ScrollController` class
  - [ ] `scroll_up(amount=3, delay=0)` - Scroll up N times
  - [ ] `scroll_down(amount=3, delay=0)` - Scroll down N times
  - [ ] `scroll_to(x, y, delay=0)` - Scroll at specific position
  - [ ] `_apply_delay(delay)` - Apply optional delay
  
- [ ] VNC scroll button implementation
  - [ ] Button 3 = scroll up
  - [ ] Button 4 = scroll down

### 2.4 VNC Connection Management

**Objectives:**
- Implement VNC protocol communication layer
- Handle protocol initialization and message sending

**Tasks:**
- [ ] Implement `VNCConnection` class
  - [ ] `__init__(host, port, username=None, password=None)` - Initialize connection
  - [ ] `connect()` - Establish VNC connection
  - [ ] `disconnect()` - Close connection gracefully
  - [ ] `send_pointer_event(x, y, button_mask)` - Send mouse event
  - [ ] `send_key_event(key_code, pressed)` - Send keyboard event
  - [ ] `_validate_connection()` - Verify connection is active
  
- [ ] Protocol handling
  - [ ] Version handshake
  - [ ] Authentication (basic password support)
  - [ ] Framebuffer initialization
  - [ ] Encoding setup

### 2.5 Main Facade Class

**Objectives:**
- Provide unified, high-level API
- Integrate all controllers

**Tasks:**
- [ ] Implement `VNCAgentBridge` main class
  - [ ] `__init__(host, port, username=None, password=None)` - Initialize
  - [ ] `connect()` - Connect to VNC server
  - [ ] `disconnect()` - Disconnect from VNC server
  - [ ] Properties:
    - [ ] `.mouse` - Access to MouseController
    - [ ] `.keyboard` - Access to KeyboardController
    - [ ] `.scroll` - Access to ScrollController
  - [ ] Context manager support (`__enter__`, `__exit__`)

---

## Phase 3: Testing & Type Checking

### 3.1 Unit Tests

**Objectives:**
- Achieve >85% code coverage
- Test all public API methods
- Test error conditions

**Tasks:**
- [ ] Create test structure
  - [ ] `tests/test_mouse.py` - MouseController tests
  - [ ] `tests/test_keyboard.py` - KeyboardController tests
  - [ ] `tests/test_scroll.py` - ScrollController tests
  - [ ] `tests/test_connection.py` - VNCConnection tests
  - [ ] `tests/test_facade.py` - VNCAgentBridge tests
  - [ ] `tests/conftest.py` - Pytest fixtures
  
- [ ] Mouse Controller tests
  - [ ] Test left/right/double click
  - [ ] Test move_to with various positions
  - [ ] Test drag_to with duration
  - [ ] Test get_position
  - [ ] Test delay parameter
  - [ ] Test error conditions
  
- [ ] Keyboard Controller tests
  - [ ] Test type_text with various strings
  - [ ] Test press_key for single keys
  - [ ] Test hotkey for key combinations
  - [ ] Test keydown/keyup
  - [ ] Test delay parameter
  - [ ] Test special characters
  
- [ ] Scroll Controller tests
  - [ ] Test scroll_up/scroll_down
  - [ ] Test scroll_to positioning
  - [ ] Test delay parameter
  
- [ ] Integration tests
  - [ ] Test full workflow (connect, interact, disconnect)
  - [ ] Test context manager usage
  - [ ] Test multiple operations in sequence

### 3.2 Type Checking with MyPy

**Objectives:**
- Ensure complete type annotations
- Pass strict mypy checking
- Improve IDE support and code clarity

**Tasks:**
- [ ] Add comprehensive type hints
  - [ ] All function parameters
  - [ ] All return types
  - [ ] Class attributes
  - [ ] Module-level variables
  
- [ ] Type annotations checklist
  - [ ] `MouseController` - Full type coverage
  - [ ] `KeyboardController` - Full type coverage
  - [ ] `ScrollController` - Full type coverage
  - [ ] `VNCConnection` - Full type coverage
  - [ ] `VNCAgentBridge` - Full type coverage
  - [ ] All exceptions
  - [ ] All type definitions
  
- [ ] MyPy validation
  - [ ] Run mypy with strict settings
  - [ ] Fix any type issues
  - [ ] Document any `# type: ignore` with justification
  - [ ] Maintain 100% pass rate

### 3.3 Test Coverage

**Objectives:**
- Achieve >85% code coverage
- Identify untested code paths

**Tasks:**
- [ ] Run pytest with coverage
- [ ] Generate coverage report
- [ ] Identify gaps
- [ ] Add tests for uncovered paths
- [ ] Maintain coverage badge

---

## Phase 4: Documentation & Polish

### 4.1 Code Documentation

**Objectives:**
- Provide clear, comprehensive documentation
- Enable easy adoption by users

**Tasks:**
- [ ] Add docstrings to all modules
  - [ ] Module-level docstrings
  - [ ] Class docstrings
  - [ ] Method docstrings with examples
  - [ ] Follow Google or NumPy docstring style
  
- [ ] Create API documentation
  - [ ] `docs/api/mouse.md` - MouseController API
  - [ ] `docs/api/keyboard.md` - KeyboardController API
  - [ ] `docs/api/scroll.md` - ScrollController API
  - [ ] `docs/api/connection.md` - Connection management
  
- [ ] Create usage guides
  - [ ] `docs/guides/getting_started.md` - Quick start
  - [ ] `docs/guides/mouse_control.md` - Mouse usage
  - [ ] `docs/guides/keyboard_input.md` - Keyboard usage
  - [ ] `docs/guides/scrolling.md` - Scrolling usage
  - [ ] `docs/guides/advanced.md` - Advanced usage

### 4.2 README & Quick Start

**Objectives:**
- Attract users with clear overview
- Provide immediate usage examples

**Tasks:**
- [ ] Write comprehensive README.md
  - [ ] Project description
  - [ ] Key features
  - [ ] Installation instructions
  - [ ] Quick start example
  - [ ] Feature overview
  - [ ] Contributing guidelines
  - [ ] License information
  
- [ ] Create quick start examples
  - [ ] Basic mouse control
  - [ ] Basic keyboard input
  - [ ] Basic scrolling
  - [ ] Full workflow example

### 4.3 Package Distribution

**Objectives:**
- Prepare package for PyPI distribution
- Enable easy installation via pip

**Tasks:**
- [ ] Finalize package metadata
  - [ ] Version number in `__init__.py`
  - [ ] Description and long description
  - [ ] Keywords and classifiers
  - [ ] Author and maintainer info
  
- [ ] Create distribution files
  - [ ] Build wheel distribution
  - [ ] Build source distribution
  - [ ] Verify dist files
  
- [ ] Prepare for PyPI
  - [ ] Create PyPI account (if applicable)
  - [ ] Test with testpypi first
  - [ ] Upload to PyPI
  - [ ] Verify package page

### 4.4 CI/CD Setup

**Objectives:**
- Automate testing and quality checks
- Ensure consistent code quality

**Tasks:**
- [ ] Set up GitHub Actions (or equivalent)
  - [ ] Test workflow (.github/workflows/tests.yml)
  - [ ] Type checking workflow
  - [ ] Coverage reporting
  
- [ ] Create CI configuration
  - [ ] Lint checks (flake8, pylint)
  - [ ] Type checks (mypy)
  - [ ] Test suite (pytest)
  - [ ] Coverage reports
  - [ ] Build distribution

---

## Deliverables Checklist

### Code Quality
- [ ] All code passes mypy strict type checking
- [ ] All tests pass with pytest
- [ ] Code coverage >85%
- [ ] No linting errors (flake8, pylint)
- [ ] Code formatted with black/autopep8

### Functionality
- [ ] Mouse: left click, right click, double click
- [ ] Mouse: move_to, drag_to with duration
- [ ] Mouse: get_position
- [ ] Keyboard: type_text
- [ ] Keyboard: press_key, hotkey, keydown, keyup
- [ ] Scroll: scroll_up, scroll_down, scroll_to
- [ ] All methods support optional delay parameter
- [ ] Proper error handling and exceptions

### Testing
- [ ] Unit tests for all controllers
- [ ] Integration tests
- [ ] Mock VNC connection for testing
- [ ] >85% code coverage
- [ ] All edge cases covered

### Documentation
- [ ] Comprehensive README.md
- [ ] API documentation
- [ ] Usage guides
- [ ] Docstrings in all code
- [ ] Contributing guide
- [ ] License (MIT)

### Package
- [ ] Proper package structure
- [ ] pyproject.toml configuration
- [ ] setup.py configuration
- [ ] Version management
- [ ] PyPI ready
- [ ] CI/CD workflows

### Open Source Readiness
- [ ] MIT License included
- [ ] Contributing guidelines
- [ ] Code of conduct (optional but recommended)
- [ ] Issue templates (optional)
- [ ] PR templates (optional)

---

## Timeline Estimate

| Phase | Duration | Key Deliverables |
|-------|----------|------------------|
| Phase 1 | 1-2 days | Project structure, configuration, architecture |
| Phase 2 | 3-5 days | Core functionality, 500+ lines of code |
| Phase 3 | 2-3 days | Tests, type checking, coverage >85% |
| Phase 4 | 1-2 days | Documentation, packaging, CI/CD |
| **Total** | **7-12 days** | **Production-ready open source package** |

---

## Key Decisions & Rationale

1. **Synchronous API (Initial)** - Starting with sync API for simplicity; async can be added later
2. **No VNC Connection Initially** - Mock/stub connection for easier testing without server dependency
3. **X11 Key Codes** - Using standard X11 keysym for portability
4. **Delay as Parameter** - Optional delay parameter on all methods for flexible timing control
5. **Type Safety First** - Strict mypy checking from the start
6. **Comprehensive Testing** - High coverage requirement (>85%) ensures reliability
7. **MIT License** - Permissive open source license for maximum adoption

---

## Success Criteria

- ✅ Package can be installed via pip
- ✅ All public API methods documented with examples
- ✅ Code passes mypy strict type checking
- ✅ All tests pass with >85% coverage
- ✅ README has working quick start example
- ✅ Ready for PyPI distribution
- ✅ Follows Python packaging best practices (PEP standards)
