# Bulk Import UI - Implementation Summary

## Overview
Successfully implemented a GridView-based bulk import interface for the ngauge-caterpoint module that allows selective import of orders from Caterpoint API to the backend system.

## Implementation Components

### 1. Controller Actions (OrderController.php)

#### `actionBulkList()` - Fetch and Display Orders
- **Route:** `GET /NGauge/caterpoint/order/bulk-list`
- **Parameters:**
  - `cursor` (optional) - For pagination
  - `limit` (default: 50) - Orders per page
  - `refresh` (default: false) - Bypass cache
- **Function:**
  - Fetches orders from Caterpoint API or cache
  - Normalizes orders using DataNormalizer component
  - Caches normalized data for 1 hour (3600s TTL)
  - Passes cache key to view for subsequent import

#### `actionBulkImport()` - Process Selected Orders
- **Route:** `POST /NGauge/caterpoint/order/bulk-import`
- **Parameters:**
  - `order_ids[]` - Selected order IDs from POST
  - `cache_key` - Cache identifier for data validation
- **Function:**
  - Validates cache hasn't expired
  - Iterates through selected orders
  - Calls OrderImporter::newCaterPointOrder() for each
  - Tracks success/failure/skip counts
  - Logs operations to 'caterpoint.bulk' channel
  - Redirects with summary message

### 2. View Template (src/views/order/bulk-list.php)

**Features:**
- **Order Table Display:**
  - Order ID with timestamp
  - Buyer name and email
  - Item count with modal preview
  - Delivery date
  - Order source badge

- **Checkbox Selection:**
  - Individual row checkboxes
  - "Select All" checkbox in header
  - Real-time selected count display
  - Automatic submit button disable when no orders selected

- **Order Line Items Modal:**
  - View items with SKU, description, qty, price
  - Modal popup for each order
  - Responsive table within modal

- **Cache Management:**
  - Display cache status (cached vs. fresh)
  - Manual refresh button
  - Cache key stored as hidden form field

- **Pagination:**
  - "Load More Orders" button when nextCursor available
  - Support for cursor-based pagination

- **Form Submission:**
  - POST form to bulk-import action
  - CSRF token included
  - Dynamic submission validation
  - Processing indicator on submit

### 3. Styling & UX

**Bootstrap 5 Integration:**
- Responsive table design
- Alert messages for cache status
- Badge components for item counts and source
- Modal dialogs for order details
- Button group layout

**Interactive JavaScript:**
- Select All checkbox functionality
- Real-time selected count update
- Submit button state management
- Form validation on submission
- Processing state indicator

## Data Flow

```
User Views Bulk List
        ↓
Fetch Orders from API/Cache
        ↓
Normalize to Backend Format (DataNormalizer)
        ↓
Cache Normalized Data (1 hour TTL)
        ↓
Render bulk-list.php View
        ↓
User Selects Orders & Submits Form
        ↓
actionBulkImport() Processes POST
        ↓
For Each Selected Order:
    - Lookup in cache by order.id
    - Call OrderImporter::newCaterPointOrder()
    - Create backend cart
        ↓
Log Results to 'caterpoint.bulk'
        ↓
Redirect with Summary (X succeeded, Y failed, Z skipped)
```

## Cache Strategy

- **Key Format:** `caterpoint_orders_{cursor}_{limit}`
- **TTL:** 3600 seconds (1 hour)
- **Data Stored:** 
  - Normalized orders array
  - Next cursor for pagination
  - Timestamp
- **Invalidation:** Manual refresh button or cache expiration
- **Validation:** Cache key verified before import

## Error Handling

1. **Configuration Validation:**
   - Checks if module is configured
   - Redirects to dashboard if not

2. **Cache Validation:**
   - Verifies cache exists before import
   - Shows error if cache expired (>1 hour)
   - Prompts user to refresh list

3. **Order Processing:**
   - Tracks successful/failed/skipped counts
   - Logs individual order import results
   - Handles exceptions per order (doesn't stop batch)

4. **Form Validation:**
   - Prevents submission with no orders selected
   - Client-side alert before POST
   - Server-side validation of cache_key

## Logging

**Channel:** `caterpoint.bulk`

**Log Entries:**
- Order import success: `Order imported: {orderId} -> {cartId}`
- Order import failure: `Failed to import order: {orderId}`
- Import exceptions: `Exception importing order {orderId}: {message}`
- Bulk import errors: `Bulk import failed: {message}`

## Routes

URL rules already registered in Module.php bootstrap:
```
{caterpoint}/<controller:[\\w\\-]+>/<action:[\\w\\-]+>
```

**Available URLs:**
- `/NGauge/caterpoint/order/bulk-list` - Display form
- `/NGauge/caterpoint/order/bulk-import` - Process import
- `/NGauge/caterpoint/order/index` - Dashboard

## Testing Checklist

- [ ] Navigate to `/NGauge/caterpoint/order/bulk-list`
- [ ] Verify orders display from cache or fresh API
- [ ] Select individual orders with checkboxes
- [ ] Select All checkbox selects all orders
- [ ] Selected count updates in real-time
- [ ] Click order items "View" button opens modal
- [ ] Modal shows line items with correct data
- [ ] Submit button disabled when no orders selected
- [ ] Submit button enables when orders selected
- [ ] Form submission shows processing indicator
- [ ] Redirect shows success message with counts
- [ ] Check 'caterpoint.bulk' logs for import details
- [ ] Verify backend carts created correctly
- [ ] Click "Load More Orders" for pagination
- [ ] Click "Refresh Cache" to bypass 1-hour TTL

## Dependencies

**PHP Components:**
- OrderController (existing)
- DataNormalizer (v1.2.0+)
- OrderImporter (v1.2.1+)
- CaterpointClient (v1.1.8+)

**Frontend:**
- Bootstrap 5 (CSS framework)
- jQuery (for select-all and validation)
- Yii2 widgets (Pjax, ActiveForm)

**Yii2 Features:**
- Cache component
- Session flash messages
- CSRF protection
- URL management

## Version

- **View Created:** v1.2.1+ (after OrderController::actionBulkList and actionBulkImport)
- **Commit Hash:** Check git history
- **Status:** Ready for testing and production release

## Future Enhancements

- [ ] Progress indicator during bulk import
- [ ] Sorting by order ID, date, buyer
- [ ] Filtering by source, date range
- [ ] Bulk actions: mark as imported, export log
- [ ] Error details dialog per failed order
- [ ] Retry failed imports
- [ ] Batch size configuration in UI
- [ ] Export import results to CSV/PDF
