# Mission Control Search Enhancement

## Summary

Enhanced Mission Control's search functionality with the following improvements:

## Changes Made

### 1. Enhanced Search API (`/app/api/search/route.ts`)

#### New Features:
- **Search Result Highlighting**: Added `SearchResultHighlight` interface with match positions for highlighting matching terms in titles and snippets
- **Advanced Filters**: Added support for filtering by:
  - Type (task, project, document, sprint)
  - Status (open, in-progress, done, etc.)
  - Date ranges (from/to)
- **Relevance Scoring**: Implemented `calculateRelevanceScore` function that considers:
  - Exact title matches (+100)
  - Title starts with query (+80)
  - Title contains query (+60)
  - Content matches (+10 per match, max 40)
  - Recency boost (+10 for items updated < 7 days, +5 for < 30 days)
  - Active status boost (+5 for in-progress/open/active items)
- **Performance Metrics**: Added `executionTimeMs` to track search performance
- **Improved Snippets**: Added `createHighlightedSnippet` function for better context around matches

#### Response Structure:
```typescript
interface SearchResponse {
  results: SearchableResult[];
  total: number;
  query: string;
  filters?: SearchFilters;
  executionTimeMs?: number;
}
```

### 2. Enhanced Quick Search Component (`/components/layout/quick-search.tsx`)

#### New Features:
- **Search Filters UI**: Added Popover-based filter panel with:
  - Type filters (Tasks, Projects, Documents, Sprints)
  - Status filters (Open, In Progress, Done, etc.)
  - Active filter count badge
  - Clear all filters button
- **Search History**: Added localStorage-based search history with:
  - Last 10 searches stored
  - 30-day expiration
  - History display when search is empty
  - Individual history item removal
  - Clear all history option
  - Result count tracking
- **Highlighted Results**: Added `HighlightedText` component that shows matching terms with yellow background
- **Improved UI**: Better grouping, status icons, and visual hierarchy

### 3. New Search Hook (`/hooks/useSearch.ts`)

#### Features:
- **`useSearch` hook**: Comprehensive search state management with:
  - Debounced search (configurable, default 150ms)
  - Request cancellation support
  - Error handling
  - Filter management
  - Callbacks for results and errors

- **`useSearchHistory` hook**: Reusable history management with:
  - Automatic localStorage sync
  - Duplicate prevention
  - Max item limit (10)
  - 30-day automatic cleanup

- **Utilities**:
  - `createHighlightedText`: Helper for text highlighting

## API Usage Examples

### Basic Search
```
GET /api/search?q=mission
```

### Search with Filters
```
GET /api/search?q=mission&types=task,project&status=open,in-progress
```

### Search with Date Range
```
GET /api/search?q=mission&dateFrom=2026-01-01&dateTo=2026-12-31
```

## UI Components

### QuickSearch
The QuickSearch component now provides:
- ⌘K keyboard shortcut
- Filter button with active count
- Search history (recent searches)
- Highlighted matching terms
- Status icons
- Color indicators for projects

### Filter Popover
- Type filter buttons
- Status filter buttons
- Clear all option
- Visual active state

## Technical Improvements

1. **Performance**: 
   - Debounced API calls (150ms)
   - Request cancellation
   - Limited to 50 results
   - Execution time tracking

2. **User Experience**:
   - Visual feedback during loading
   - No results message with filter reset
   - Keyboard navigation support
   - Persistent search history

3. **Code Quality**:
   - TypeScript interfaces for all types
   - Reusable hooks
   - Clean separation of concerns
   - Proper error handling

## Files Modified

1. `/app/api/search/route.ts` - Enhanced API with highlighting and filters
2. `/components/layout/quick-search.tsx` - Enhanced UI with filters and history
3. `/hooks/useSearch.ts` - New search hook
4. `/components/ui/popover.tsx` - New shadcn component (auto-installed)

## Testing

The build completes successfully with these changes. The search functionality is backwards compatible - existing search functionality continues to work while new features are opt-in.

## Future Enhancements (Optional)

Potential additional improvements:
1. Fuzzy search with Levenshtein distance
2. Search analytics/tracking
3. Saved searches
4. Advanced date range picker
5. Search result pagination
6. Full-text search with PostgreSQL