# AI Inventory Step Redesign - Key Differences

## Overview
Completely redesigned UploadSalesDataStep to follow the suppliers/recipes pattern with list-based management and deferred creation.

## Major Changes

### 1. **Data Model**
**BEFORE**:
```typescript
interface InventoryItem {
  suggestion_id: string;
  selected: boolean;  // Checkbox selection
  stock_quantity: number;
  cost_per_unit: number;
}
```

**AFTER**:
```typescript
interface InventoryItemForm {
  id: string;  // UI tracking
  name: string;
  // ... all inventory fields
  isSuggested: boolean;  // Track if from AI or manual
  // NO "selected" field - all items in list will be created
}
```

### 2. **Creation Timing**
**BEFORE**:
- Checkbox selection UI
- "Create Inventory" button → Creates immediately → Proceeds to next step

**AFTER**:
- List-based UI (like suppliers/recipes)
- Items added to list (NOT created yet)
- "Next" button → Creates ALL items → Proceeds to next step

### 3. **UI Pattern**

**BEFORE** (Old Pattern):
```
┌─────────────────────────────────────┐
│  ☑️ Product 1  [Edit fields inline] │
│  ☐ Product 2  [Edit fields inline] │
│  ☑️ Product 3  [Edit fields inline] │
│                                     │
│  [Create 2 Selected Items]          │
└─────────────────────────────────────┘
```

**AFTER** (New Pattern - Like Suppliers/Recipes):
```
┌─────────────────────────────────────┐
│  Product 1 (AI 95%)   [Edit][Delete]│
│  Stock: 50kg  Cost: €5.00           │
│                                     │
│  Product 2 (Manual)   [Edit][Delete]│
│  Stock: 30kg  Cost: €3.00           │
│                                     │
│  [➕ Add Ingredient Manually]       │
│                                     │
│  ──────────────────────────────────  │
│  3 ingredients - Ready!  [Next →]   │
└─────────────────────────────────────┘
```

### 4. **Manual Addition**
**BEFORE**: No way to add manual ingredients

**AFTER**:
- "Add Ingredient Manually" button
- Full form with all fields
- Adds to the same list as AI suggestions
- Can edit/delete both AI and manual items

### 5. **Edit/Delete**
**BEFORE**:
- Inline editing only
- No delete (just deselect)

**AFTER**:
- Click "Edit" → Opens form with all fields
- Click "Delete" → Removes from list
- Works for both AI suggestions and manual entries

### 6. **Code Structure**

**BEFORE** (Old):
```typescript
// State
const [inventoryItems, setInventoryItems] = useState<InventoryItem[]>([]);

// Selection toggle
const handleToggleSelection = (id: string) => {
  setInventoryItems(items =>
    items.map(item =>
      item.suggestion_id === id ? { ...item, selected: !item.selected } : item
    )
  );
};

// Create button - immediate creation
const handleCreateInventory = async () => {
  const selectedItems = inventoryItems.filter(item => item.selected);
  // Create immediately...
  await Promise.all(creationPromises);
  onComplete();  // Then proceed
};
```

**AFTER** (New):
```typescript
// State
const [inventoryItems, setInventoryItems] = useState<InventoryItemForm[]>([]);
const [isAdding, setIsAdding] = useState(false);
const [editingId, setEditingId] = useState<string | null>(null);
const [formData, setFormData] = useState<InventoryItemForm>({ ... });

// Add/Edit item in list (NOT in database)
const handleSubmitForm = (e: React.FormEvent) => {
  if (editingId) {
    // Update in list
    setInventoryItems(items => items.map(item =>
      item.id === editingId ? { ...formData, id: editingId } : item
    ));
  } else {
    // Add to list
    setInventoryItems(items => [...items, newItem]);
  }
  resetForm();
};

// Delete from list
const handleDelete = (itemId: string) => {
  setInventoryItems(items => items.filter(item => item.id !== itemId));
};

// Next button - create ALL at once
const handleNext = async () => {
  // Create ALL items in the list
  const creationPromises = inventoryItems.map(item => createIngredient.mutateAsync(...));
  await Promise.allSettled(creationPromises);
  onComplete();  // Then proceed
};
```

### 7. **Component Sections**

**BEFORE**: 2 main sections
1. File upload view
2. Checkbox selection + edit view

**AFTER**: 2 main sections
1. File upload view (same)
2. **List management view**:
   - "Why This Matters" info box
   - Ingredient list (cards with edit/delete)
   - Add/Edit form (appears on click)
   - Navigation with "Next" button

## Key Benefits

✅ **Consistent UI**: Matches suppliers/recipes pattern exactly
✅ **Flexibility**: Users can review, edit, delete, and add items before creating
✅ **Deferred Creation**: All items created at once when clicking "Next"
✅ **Manual Addition**: Users can add ingredients beyond AI suggestions
✅ **Better UX**: Clear "Edit" and "Delete" actions per item
✅ **Unified Pattern**: Same workflow for AI and manual items

## Files Changed

- `/home/user/bakery_ia/frontend/src/components/domain/onboarding/steps/UploadSalesDataStep.tsx` - **Completely rewritten** (963 lines)
- `/home/user/bakery_ia/frontend/src/components/domain/setup-wizard/steps/RecipesSetupStep.tsx` - Added Next button (2 lines)

## Testing Checklist

- [ ] Upload sales data file → AI suggestions load correctly
- [ ] Edit AI suggestion → Changes saved to list
- [ ] Delete AI suggestion → Removed from list
- [ ] Add manual ingredient → Added to list
- [ ] Edit manual ingredient → Changes saved
- [ ] Delete manual ingredient → Removed from list
- [ ] Click "Next" with 0 items → Error shown
- [ ] Click "Next" with items → All created and proceeds to next step
- [ ] Form validation works (required fields, min values)
- [ ] UI matches suppliers/recipes styling