# Image Description AI - Implementation Tasks

## Task 1: Create Basic HTML Structure and Styling Foundation
**Objective**: Establish the foundational HTML structure with semantic markup and responsive CSS framework
**Deliverables**: 
- Complete HTML skeleton with proper DOCTYPE and meta tags
- Responsive CSS Grid layout system for the main application container
- Modern color scheme implementation (blues/grays as specified)
- Typography system with readable fonts and proper spacing
- Mobile-first responsive breakpoints

**Acceptance Criteria**:
- [ ] HTML validates as HTML5 standard
- [ ] Layout is responsive across mobile (320px+), tablet (768px+), and desktop (1024px+)
- [ ] Color scheme uses professional blue/gray palette with proper contrast ratios
- [ ] Typography is legible across all device sizes
- [ ] Basic layout structure includes: header, main upload area, preview section, results section
- [ ] CSS is modular with clear section organization (layout, components, utilities)

## Task 2: Implement File Upload Interface with Drag & Drop
**Objective**: Create an intuitive file upload interface supporting both drag-and-drop and click-to-browse functionality
**Deliverables**:
- Drag-and-drop zone with visual feedback states (drag over, drop, default)
- Hidden file input element for click-to-browse functionality
- Visual upload area with icon, instructional text, and file format specifications
- File type icon display for different image formats
- Hover and focus states for accessibility

**Acceptance Criteria**:
- [ ] Drag-and-drop zone visually responds to drag events with proper styling
- [ ] Click-to-browse opens file dialog and triggers file selection
- [ ] Upload area shows clear instructions: "Drag an image here or click to browse"
- [ ] Supported formats are displayed: JPG, PNG, WebP
- [ ] Accessibility: Keyboard navigation and screen reader support
- [ ] Visual feedback on hover/focus with smooth transitions

## Task 3: Add File Validation and Error Handling System
**Objective**: Implement comprehensive file validation to ensure only valid images are processed
**Deliverables**:
- File type validation (accept only jpg, jpeg, png, webp)
- File size validation (maximum 5MB with user-friendly error messages)
- Validation feedback system with clear error messages
- File metadata extraction (name, size, type)
- Reset functionality to clear errors and start over

**Acceptance Criteria**:
- [ ] Invalid file types show error: "Please select a valid image file (JPG, PNG, WebP)"
- [ ] Files over 5MB show error: "File size must be less than 5MB"
- [ ] Error messages display in red text below upload area
- [ ] Successful validation clears previous errors
- [ ] Validation occurs immediately upon file selection
- [ ] Files with valid extensions but invalid content are caught
- [ ] Reset button clears all errors and upload area state

## Task 4: Implement Image Preview Functionality
**Objective**: Display uploaded image with proper sizing and formatting for user confirmation
**Deliverables**:
- Image preview container with proper aspect ratio handling
- Image resizing and optimization for preview (max 400px width/height)
- Base64 encoding of the selected image for API submission
- Metadata display (filename, file size, dimensions)
- Replace/change image functionality

**Acceptance Criteria**:
- [ ] Image preview displays within 2 seconds of file selection
- [ ] Preview maintains aspect ratio without distortion
- [ ] Large images are scaled appropriately for preview
- [ ] Base64 encoding completes successfully and is stored in memory
- [ ] Image metadata is extracted and displayed (filename, size in MB, dimensions)
- [ ] "Change Image" button allows uploading a different file
- [ ] Preview clears when starting over

## Task 5: Integrate Minimax API for Image Description Generation
**Objective**: Connect to Minimax API and implement the core AI description generation functionality
**Deliverables**:
- API request construction with proper payload format
- Base64 image embedding in the request body
- Proper error handling for network issues and API responses
- Response parsing and extraction of the AI-generated description
- API key management (client-side with security notes)

**Acceptance Criteria**:
- [ ] API request uses correct endpoint: `https://api.minimax.io/v1/text/chatcompletion_v2`
- [ ] Request payload includes model: "MiniMax-M2"
- [ ] Base64 image is properly formatted in the messages array
- [ ] Prompt "Please provide a detailed description of this image in English" is included
- [ ] Successful API response extracts the description text
- [ ] API errors are handled gracefully with user-friendly messages
- [ ] Network timeouts are handled with appropriate error messaging
- [ ] Loading state is shown during API calls

## Task 6: Create Loading States and User Feedback System
**Objective**: Implement comprehensive loading and feedback mechanisms to enhance user experience
**Deliverables**:
- Loading spinner and progress indicator during API calls
- Status messages for different processing stages
- Button state management (disabled during processing)
- Timeout handling with user notification
- Success and error state animations

**Acceptance Criteria**:
- [ ] Loading spinner appears immediately when "Generate Description" is clicked
- [ ] "Generate Description" button is disabled during processing to prevent duplicate requests
- [ ] Status message shows: "Analyzing image with AI..."
- [ ] Processing timeout (30 seconds) shows: "Processing is taking longer than expected"
- [ ] Success animation plays when description is generated
- [ ] Error state shows appropriate error message with red styling
- [ ] Loading states have smooth transitions and professional appearance

## Task 7: Display AI Description Results with Formatting
**Objective**: Present the AI-generated description in a clean, readable format with additional functionality
**Deliverables**:
- Results display area with proper typography and spacing
- Text formatting and paragraph handling for long descriptions
- Option to copy description to clipboard
- "Generate New Description" functionality for the same image
- "Upload New Image" reset functionality
- Responsive results layout

**Acceptance Criteria**:
- [ ] Description displays in a readable format with proper line breaks
- [ ] Long descriptions are scrollable if they exceed viewport
- [ ] "Copy to Clipboard" button works and shows confirmation
- [ ] "Generate New Description" button triggers new API call
- [ ] "Upload New Image" button clears all data and returns to upload state
- [ ] Results area is visually distinct from upload area
- [ ] Typography is large enough to read comfortably on mobile devices

## Task 8: Final Polish, Testing, and Production Readiness
**Objective**: Complete final testing, optimizations, and prepare for immediate browser deployment
**Deliverables**:
- Comprehensive error handling for all edge cases
- Performance optimization for large images and slow networks
- Cross-browser compatibility testing
- Accessibility improvements (ARIA labels, keyboard navigation)
- Final code organization and documentation
- Single HTML file consolidation with inline CSS and JavaScript

**Acceptance Criteria**:
- [ ] Application works in Chrome, Firefox, Safari, and Edge
- [ ] All functionality works on mobile devices (iOS and Android)
- [ ] Images up to 5MB process within 30 seconds on average connections
- [ ] Clear error messages for all failure scenarios (network, API, validation)
- [ ] Complete keyboard navigation support
- [ ] ARIA labels and semantic HTML for screen readers
- [ ] No console errors or warnings
- [ ] Single HTML file contains all code and loads immediately in any modern browser
- [ ] Professional appearance with smooth animations and transitions
- [ ] File size under 50KB for fast loading

## Implementation Notes

### Task Dependencies
- Tasks 1-2 can be implemented in parallel
- Task 3 depends on Task 2 (validation needs upload interface)
- Task 4 depends on Task 3 (preview needs validation)
- Task 5 depends on Task 4 (API needs base64 image)
- Task 6 depends on Task 5 (loading states during API calls)
- Task 7 depends on Task 6 (results display after processing)
- Task 8 depends on all previous tasks (final testing and polish)

### Technical Considerations
- Use vanilla JavaScript ES6+ features for modern browser support
- Implement CSS custom properties for maintainable theming
- Follow progressive enhancement principles
- Maintain separation of concerns within the single file
- Include comprehensive error boundaries

### Testing Approach
- Test with various image sizes and formats
- Test error scenarios (large files, invalid types, network issues)
- Verify responsive behavior across devices
- Validate accessibility with screen readers
- Performance test with slow network connections