# Development Guide - TigerStyle Life9

## 🛠️ Development Environment Setup

### Prerequisites
- **WordPress**: Local development environment (Local by Flywheel, XAMPP, Docker)
- **Node.js**: 18+ for Astro frontend development
- **PHP**: 7.4+ with required extensions
- **Composer**: For PHP dependency management

### Quick Setup
```bash
# Clone to WordPress plugins directory
cd /path/to/wordpress/wp-content/plugins/
git clone https://github.com/tigerstyle/life9.git tigerstyle-life9
cd tigerstyle-life9

# Install dependencies
npm install
composer install

# Build frontend (optional - fallbacks work without build)
npm run build

# Activate in WordPress admin
```

## 🏗️ Project Architecture

### Directory Structure
```
tigerstyle-life9/
├── 📄 tigerstyle-life9.php      # Main plugin file (singleton pattern)
├── 📁 includes/                 # Core PHP classes
│   ├── 🛡️ class-security.php    # Security management layer
│   ├── 🔒 class-encryption.php  # AES-256-GCM encryption
│   ├── 🧹 class-sanitizer.php   # Input sanitization
│   ├── ✅ class-validator.php    # Data validation
│   ├── 📦 class-backup-engine.php # Backup orchestration
│   ├── 🗄️ class-database-backup.php # MySQL export
│   ├── 📁 class-file-scanner.php # File discovery
│   ├── 💾 class-storage-manager.php # Storage abstraction
│   ├── 🌐 class-rest-endpoints.php # REST API
│   ├── 🎨 class-admin.php       # WordPress admin integration
│   └── 📁 storage/              # Storage backend implementations
├── 📁 src/astro/               # Modern frontend
│   ├── 📁 pages/               # Admin interface pages
│   │   ├── backup.astro        # Backup creation interface
│   │   ├── restore.astro       # Restore wizard
│   │   ├── settings.astro      # Configuration panel
│   │   └── admin-dashboard.astro # Main dashboard
│   ├── 📁 components/          # Reusable UI components
│   │   └── FileBrowser.astro   # File selection component
│   └── 📁 layouts/             # Page layouts
│       └── WordPressAdmin.astro # WordPress admin wrapper
├── 📁 admin/assets/            # Compiled frontend assets
│   ├── 📁 css/                 # Stylesheets
│   └── 📁 dist/                # Built Astro output
├── 📁 build-tools/             # Development utilities
├── 🔧 astro.config.mjs         # Astro build configuration
├── 📋 package.json             # Node.js dependencies
├── 📋 composer.json            # PHP dependencies
└── 📚 Documentation files
```

### Design Patterns Used

#### 1. Singleton Pattern (Main Plugin)
```php
final class TigerStyle_Life9 {
    private static $instance = null;
    
    public static function instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }
}
```

#### 2. Abstract Factory (Storage Backends)
```php
abstract class TigerStyle_Life9_Storage_Backend {
    abstract public function store($file_path, $config = []);
    abstract public function retrieve($remote_path, $local_path, $config = []);
    abstract public function delete($remote_path, $config = []);
}
```

#### 3. Strategy Pattern (Backup Types)
```php
class TigerStyle_Life9_Backup_Engine {
    private $strategies = [];
    
    public function add_strategy($type, $strategy) {
        $this->strategies[$type] = $strategy;
    }
    
    public function execute_backup($type, $config) {
        return $this->strategies[$type]->backup($config);
    }
}
```

#### 4. Observer Pattern (Progress Tracking)
```php
// Server-Sent Events for real-time updates
class TigerStyle_Life9_Progress_Tracker {
    private $observers = [];
    
    public function notify_progress($backup_id, $progress) {
        foreach ($this->observers as $observer) {
            $observer->update($backup_id, $progress);
        }
    }
}
```

## 🧩 Component Development

### Creating New Astro Components

1. **Create component file**:
```astro
---
// src/astro/components/NewComponent.astro
interface Props {
    title: string;
    data?: any[];
}

const { title, data = [] } = Astro.props;
---

<div class="new-component" x-data="newComponent()">
    <h3>{title}</h3>
    <div class="component-content">
        <!-- Component HTML -->
    </div>
</div>

<script>
function newComponent() {
    return {
        // Alpine.js reactive data
        items: [],
        loading: false,
        
        // Methods
        async loadData() {
            this.loading = true;
            try {
                const response = await this.$wp.ajax('get_component_data');
                this.items = response.data;
            } finally {
                this.loading = false;
            }
        }
    };
}
</script>
```

2. **Add styles** in `admin/assets/css/admin.css`:
```css
.new-component {
    padding: var(--tigerstyle-spacing-lg);
    border: 1px solid var(--tigerstyle-gray-200);
    border-radius: var(--tigerstyle-radius-lg);
}
```

### Creating PHP Backend Classes

1. **Follow WordPress coding standards**:
```php
<?php
/**
 * New Feature Class
 * 
 * Description of what this class does
 * 
 * @package TigerStyleLife9
 * @since 1.0.0
 */

// Exit if accessed directly
if (!defined('ABSPATH')) {
    exit;
}

/**
 * New feature implementation
 * 
 * @since 1.0.0
 */
class TigerStyle_Life9_New_Feature {
    
    /**
     * Security instance
     * 
     * @var TigerStyle_Life9_Security
     */
    private $security;
    
    /**
     * Constructor
     */
    public function __construct() {
        $this->security = tigerstyle_life9()->get_security();
        $this->init_hooks();
    }
    
    /**
     * Initialize WordPress hooks
     */
    private function init_hooks() {
        add_action('wp_ajax_tigerstyle_life9_new_action', [$this, 'handle_ajax']);
    }
    
    /**
     * Handle AJAX request
     */
    public function handle_ajax() {
        // Security checks
        check_ajax_referer('tigerstyle_life9_ajax', '_wpnonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error('Insufficient permissions');
        }
        
        // Input validation
        $input = $this->security->sanitize_input($_POST);
        
        // Business logic
        $result = $this->process_request($input);
        
        wp_send_json_success($result);
    }
}
```

## 🧪 Testing Framework

### PHP Unit Tests
```php
// tests/test-backup-engine.php
class Test_Backup_Engine extends WP_UnitTestCase {
    
    private $backup_engine;
    
    public function setUp(): void {
        parent::setUp();
        $this->backup_engine = new TigerStyle_Life9_Backup_Engine(tigerstyle_life9());
    }
    
    public function test_backup_creation() {
        $config = [
            'include_files' => true,
            'include_database' => true
        ];
        
        $result = $this->backup_engine->create_backup($config);
        
        $this->assertIsArray($result);
        $this->assertArrayHasKey('backup_id', $result);
        $this->assertTrue($result['success']);
    }
    
    public function test_security_validation() {
        // Test path traversal prevention
        $malicious_path = '../../wp-config.php';
        $is_valid = $this->backup_engine->validate_backup_path($malicious_path);
        
        $this->assertFalse($is_valid);
    }
}
```

### Frontend Testing
```javascript
// tests/backup-interface.test.js
import { test, expect } from '@playwright/test';

test('backup interface loads correctly', async ({ page }) => {
    await page.goto('/wp-admin/admin.php?page=tigerstyle-life9-backup');
    
    // Check for main elements
    await expect(page.locator('h1')).toContainText('Create Backup');
    await expect(page.locator('.backup-type-grid')).toBeVisible();
    
    // Test backup configuration
    await page.check('[x-model="config.includeFiles"]');
    await page.check('[x-model="config.includeDatabase"]');
    
    await expect(page.locator('button[type="submit"]')).toBeEnabled();
});
```

## 🔧 Build Process

### Development Workflow
```bash
# Start development
npm run dev          # Astro dev server with hot reload
npm run watch        # Watch for changes and rebuild

# Build for production
npm run build        # Build optimized Astro assets
npm run build:wp     # WordPress-specific build

# Testing
npm run test         # Run all tests
npm run test:unit    # PHP unit tests
npm run test:e2e     # End-to-end tests
npm run test:security # Security scans

# Code quality
npm run lint         # ESLint + Prettier
composer run phpcs   # PHP CodeSniffer
composer run psalm   # Static analysis
```

### Custom Build Scripts
```javascript
// build-tools/wordpress-integration.js
export async function buildForWordPress() {
    // Convert Astro pages to WordPress-compatible format
    // Generate asset manifest for PHP integration
    // Optimize for WordPress admin environment
}
```

## 🎨 Styling System

### CSS Architecture
```css
/* CSS Custom Properties for theming */
:root {
    --tigerstyle-primary: #1e40af;
    --tigerstyle-spacing-md: 1rem;
    --tigerstyle-radius-lg: 0.5rem;
}

/* Component-scoped styles */
.tigerstyle-backup-interface {
    /* Styles scoped to prevent WordPress conflicts */
}

/* Utility classes */
.tigerstyle-card { /* Reusable card component */ }
.tigerstyle-button-primary { /* Primary button styling */ }
```

### Alpine.js Integration
```javascript
// Global Alpine.js helpers
document.addEventListener('alpine:init', () => {
    Alpine.magic('wp', () => ({
        ajax: async (action, data = {}) => {
            // WordPress AJAX wrapper with security
        },
        nonce: tigerStyleLife9.nonce,
        capabilities: tigerStyleLife9.capabilities
    }));
});
```

## 🚀 Deployment

### Production Checklist
- [ ] Run security scans (`composer audit`, `npm audit`)
- [ ] Execute full test suite
- [ ] Build optimized assets (`npm run build`)
- [ ] Verify PHP compatibility (7.4+)
- [ ] Test on clean WordPress installation
- [ ] Review security configuration
- [ ] Update version numbers
- [ ] Generate changelog

### Release Process
1. **Version bump** in `tigerstyle-life9.php` and `package.json`
2. **Build assets** with `npm run build`
3. **Run tests** with `npm run test`
4. **Security scan** with `composer audit`
5. **Create release** on GitHub with changelog
6. **Submit to WordPress.org** plugin repository

## 🐛 Debugging

### Debug Mode
```php
// Enable debug mode
define('TIGERSTYLE_LIFE9_DEBUG', true);
define('WP_DEBUG_LOG', true);

// Custom logging
tigerstyle_life9_log('Debug message', $data);
```

### Common Issues
- **Astro build fails**: Check Node.js version and dependencies
- **Backup permissions**: Verify WordPress file permissions
- **Memory limits**: Increase PHP memory_limit for large sites
- **Progress tracking**: Check Server-Sent Events support

---

**Happy coding! Build something awesome! 🚀**