# Implementation Plan

- [x] 1. Set up project structure and core HTML foundation
  - Create index.html with semantic structure for the main application layout
  - Set up Tailwind CSS integration and custom CSS variables from Figma design
  - Create basic HTML structure for header, input section, video list, and control panel
  - _Requirements: 2.1, 5.1, 5.2, 5.3_

- [x] 2. Implement header component with exact Figma styling
  - Create header HTML structure with app logo, title, and window controls
  - Apply exact Figma color values and typography using Tailwind classes
  - Add SVG icons for logo and window control buttons
  - _Requirements: 2.1, 5.1, 5.2, 5.3, 5.4_

- [x] 3. Build URL input section with interactive elements
  - Create textarea for YouTube URL input with placeholder text
  - Implement "Add Video" and "Import URLs" buttons with proper styling
  - Add save path selector, quality dropdown, and format dropdown components
  - Apply exact spacing, colors, and border radius from Figma design
  - _Requirements: 1.1, 2.1, 3.1, 5.1, 5.2, 5.3, 5.4_

- [x] 4. Create video list table structure and styling
  - Build grid-based table layout with proper column structure
  - Create video item component template with thumbnail, title, duration, and controls
  - Implement responsive grid system matching Figma layout specifications
  - Add proper spacing and alignment for all table elements
  - _Requirements: 2.1, 3.1, 5.1, 5.2, 5.3, 5.4_

- [x] 5. Implement status badges with integrated progress display
  - Create status badge component with color-coded states (Ready, Downloading, Converting, Completed, Error)
  - Integrate progress percentage directly into status badges for downloading/converting states
  - Apply exact color values from Figma for each status state
  - Add proper typography and spacing for status text and progress percentages
  - _Requirements: 1.4, 4.1, 4.2, 4.3, 5.1, 5.2, 5.3, 5.4_

- [x] 6. Build control panel with action buttons
  - Create bottom control panel with "Clear List", "Update Dependencies", "Cancel Downloads" buttons
  - Implement "Download Videos" primary action button
  - Add status message area for user feedback
  - Apply exact button styling, colors, and spacing from Figma
  - _Requirements: 1.2, 2.1, 4.4, 5.1, 5.2, 5.3, 5.4_

- [x] 7. Implement JavaScript state management and data models
  - Create Video object model with all required properties (id, url, title, thumbnail, etc.)
  - Implement application state management for videos array and configuration
  - Add functions for adding, removing, and updating video objects
  - Create utility functions for URL validation and format handling
  - _Requirements: 1.1, 1.5, 3.1, 3.2_

- [x] 8. Add URL validation and video addition functionality
  - Implement YouTube/Vimeo URL validation with regex patterns
  - Create function to extract video information from URLs
  - Add video to list functionality with proper error handling
  - Display validation errors for invalid URLs
  - _Requirements: 1.1, 1.5, 3.1, 4.3_

- [x] 9. Implement interactive dropdown menus for quality and format selection
  - Create dropdown components for quality selection (720p, 1080p, 4K, etc.)
  - Build format selection dropdown (None, H264, ProRes, DNxHR, Audio only)
  - Add event handlers for dropdown value changes
  - Update video object properties when selections change
  - _Requirements: 3.1, 3.2, 3.3_

- [x] 10. Integrate Electron IPC for desktop app functionality
  - Connect renderer process to main process via secure IPC channels
  - Implement file system operations (save directory selection, cookie file selection)
  - Add binary version checking and management through main process
  - Create secure communication layer for video download operations
  - _Requirements: 1.1, 1.2, 3.1, 4.1_

- [x] 11. Implement real video download functionality with yt-dlp integration
  - Connect to yt-dlp binary through main process for actual video downloads
  - Implement progress tracking with real download progress from yt-dlp output
  - Add status transitions (Ready → Downloading → Converting → Completed)
  - Handle video metadata extraction and thumbnail fetching
  - _Requirements: 1.2, 1.4, 4.1, 4.2_

- [x] 12. Add format conversion with ffmpeg integration
  - Integrate ffmpeg binary for video format conversion (H264, ProRes, DNxHR)
  - Implement audio-only extraction functionality
  - Add conversion progress tracking and status updates
  - Handle format-specific encoding parameters and quality settings
  - _Requirements: 3.2, 3.3, 4.1, 4.2_

- [x] 13. Implement desktop-native file operations and error handling
  - Add native file dialogs for save directory and cookie file selection
  - Implement error states for failed downloads with proper error messages
  - Create desktop notification system for download completion
  - Handle binary missing scenarios and dependency management
  - _Requirements: 1.5, 4.3, 4.4_

- [x] 14. Add bulk actions and desktop app features
  - Implement "Clear List" functionality to remove all videos
  - Create "Cancel Downloads" feature to stop active download processes
  - Add video selection with checkboxes for bulk operations
  - Implement drag-and-drop reordering functionality for video list
  - _Requirements: 1.2, 4.4_

- [x] 15. Add desktop app accessibility and keyboard navigation
  - Implement full keyboard navigation for all interactive elements
  - Add proper ARIA labels and descriptions for screen readers
  - Create focus management system with visible focus indicators
  - Add live regions for status announcements during downloads
  - _Requirements: 2.2, 2.3_

- [ ] 16. Create comprehensive test suite and final integration
  - Write unit tests for URL validation and desktop app functions
  - Create integration tests for complete download workflow with binaries
  - Add Electron main/renderer process communication tests
  - Test cross-platform compatibility (macOS, Windows, Linux)
  - _Requirements: 1.1, 1.2, 1.4, 1.5, 3.1, 3.2, 3.3, 4.1, 4.2, 4.3, 4.4_

- [ ] 17. Final desktop app polish and distribution
  - Integrate all components into cohesive Electron application
  - Apply final styling adjustments to match Figma design exactly
  - Optimize performance for desktop environment
  - Prepare app for distribution (code signing, packaging)
  - _Requirements: 1.1, 1.2, 1.4, 1.5, 2.1, 2.2, 2.3, 3.1, 3.2, 3.3, 4.1, 4.2, 4.3, 4.4, 5.1, 5.2, 5.3, 5.4_