# Implementation Plan

- [x] 1. Set up project structure and core interfaces
  - Create directory structure for the plugin with src/, tests/, and configuration files
  - Define TypeScript interfaces for plugin options, parsed content, and template configuration
  - Set up package.json with dependencies (jsdom, glob, vite) and build scripts
  - Configure tsconfig.json for TypeScript compilation
  - _Requirements: 1.1, 5.1, 5.4_

- [x] 2. Implement HTML content parser
- [x] 2.1 Create HTML parsing utilities
  - Write functions to parse HTML using jsdom and extract title, meta tags, and body content
  - Implement content extraction for title element, keywords meta, and description meta
  - Create unit tests for HTML parsing with various HTML structures
  - _Requirements: 2.1, 2.2, 2.3_

- [x] 2.2 Implement asset extraction functionality
  - Write functions to extract stylesheet link elements with proper attribute preservation
  - Implement script element extraction for both type="text/javascript" and type="module"
  - Create tests for asset extraction with different script and link configurations
  - _Requirements: 2.4, 2.5, 3.1, 3.2, 3.3, 3.4_

- [x] 2.3 Add error handling for HTML parsing
  - Implement graceful handling of malformed HTML with warning logs
  - Add validation for required HTML elements and provide fallbacks
  - Create tests for error scenarios including missing elements and invalid HTML
  - _Requirements: 6.1, 6.3_

- [x] 3. Create PHP template generator
- [x] 3.1 Implement template structure generation
  - Write functions to generate PHP template with extend directive and block structure
  - Implement block content insertion for title, keywords, description, csslink, main, and script blocks
  - Create tests for template generation with various content combinations
  - _Requirements: 4.1, 4.2, 4.3, 4.4, 4.5_

- [x] 3.2 Add template customization support
  - Implement configuration options for custom block names and template structure
  - Add support for custom extend directive and footer block configuration
  - Create tests for template customization with different configuration options
  - _Requirements: 5.3_

- [x] 4. Implement file processing operations
- [x] 4.1 Create file system utilities
  - Write functions for reading HTML files with proper encoding support
  - Implement file writing operations for generated PHP templates
  - Add directory creation and file path validation utilities
  - Create tests for file operations including error scenarios
  - _Requirements: 6.2_

- [x] 4.2 Implement glob pattern matching
  - Add support for include/exclude glob patterns to filter HTML files
  - Implement file discovery functionality using glob patterns
  - Create tests for pattern matching with various file structures
  - _Requirements: 5.2_

- [x] 5. Create main plugin implementation
- [x] 5.1 Implement Vite plugin interface
  - Create main plugin function that returns Vite plugin object
  - Implement closeBundle hook to execute after build completion
  - Add buildEnd hook for error handling and cleanup
  - Create integration tests with Vite build process
  - _Requirements: 1.1, 1.3_

- [x] 5.2 Integrate all components
  - Wire together HTML parser, template generator, and file processor
  - Implement main processing workflow that handles multiple HTML files
  - Add configuration validation and default option handling
  - Create end-to-end tests with complete HTML to PHP conversion
  - _Requirements: 1.2, 5.4_

- [ ] 6. Add comprehensive error handling
- [x] 6.1 Implement error classes and codes
  - Create custom error classes with specific error codes for different failure types
  - Add detailed error messages with file paths and operation context
  - Implement error recovery mechanisms for continuing processing after failures
  - Create tests for all error scenarios and recovery mechanisms
  - _Requirements: 6.1, 6.2, 6.3, 6.4_

- [x] 6.2 Add logging and debugging support
  - Implement structured logging for processing steps and errors
  - Add debug mode with verbose output for troubleshooting
  - Create performance monitoring for processing large files
  - Add tests for logging functionality
  - _Requirements: 6.1, 6.3_

- [ ] 7. Create comprehensive test suite
- [-] 7.1 Write unit tests for all components
  - Create test fixtures with various HTML file structures and edge cases
  - Write comprehensive tests for HTML parser with malformed and complex HTML
  - Add tests for template generator with different configurations
  - Test file processor with various file system scenarios
  - _Requirements: All requirements validation_

- [ ] 7.2 Implement integration and performance tests
  - Create integration tests with real Vite projects and build processes
  - Add performance tests with large HTML files and multiple file processing
  - Test plugin with different Vite configurations and environments
  - Create tests for concurrent file processing
  - _Requirements: All requirements validation_

- [ ] 8. Add documentation and examples
- [ ] 8.1 Create comprehensive README
  - Write installation and usage instructions with code examples
  - Document all configuration options with detailed explanations
  - Add troubleshooting guide for common issues
  - Include examples of input HTML and output PHP templates
  - _Requirements: 5.1, 5.2, 5.3_

- [ ] 8.2 Create example projects
  - Build example Vite project demonstrating plugin usage
  - Create examples with different HTML structures and configurations
  - Add example showing integration with PHP template systems
  - Document best practices for using the plugin
  - _Requirements: All requirements demonstration_