# Product Packages (Bundle Products) - Implementation Plan

## Status: COMPLETE

All steps have been implemented and verified with syntax checks.

## What Was Built

### Step 1: ProductsController — Bundle CRUD Methods + Routes ✅
- Added `storeBundle()`, `updateBundle()`, `destroyBundle()`, `bundleComponents()`, `bundleData()` methods
- Added bundle routes in `routes/system_management.php`
- Modified `index()` to include `TYPE_BUNDLE` in product types
- Modified `records()` to compute virtual stock for bundles
- Modified `show()` to pass bundle component data
- Modified `loadProductDetails()` for bundle handling

### Step 2: Product Views — Bundle Modal + Index Updates ✅
- Updated `index.blade.php` with bundle CRUD JS functions and "Add Package" button
- Updated `modal.blade.php` with dual-form design (regular + bundle)
- Updated `action.blade.php` with bundle-specific edit/delete buttons

### Step 3: Product Show View — Bundle Components Tab ✅
- Added "Components" tab in show.blade.php (visible only for bundles)
- Shows component grid with product details, stock, costs
- Shows summary stats (total components, cost, profit, available packages)

### Step 4: SalesController — Bundle Sale/Return Support ✅
- Modified `normalizeSalePayload()` to skip unit type validation for bundles
- Modified `applySaleStockOut()` pre-check to verify component stock via `BundleService::verifyComponentsForSale()`
- Modified `applySaleStockOut()` deduction to decompose bundles into component FIFO consumption
- Added `applyBundleStockOut()` method for component stock deduction
- Modified `cancel()` to restore component stock (grouped by component product_id)
- Added `isBundleProductType()` helper

### Step 5: PosController — Bundle Sale Support ✅
- Modified `products()` to calculate virtual stock for bundles via `BundleService::computeAvailableQuantity()`
- Added `is_bundle` flag and empty batches for bundle products
- Modified `completeSale()` validation: batch_id is now nullable
- Added bundle permission check (`product_bundle-sell`)
- Added bundle handling in item processing (skip batch, verify components)
- Added bundle stock deduction via `applyBundlePosStockOut()`
- Added `consumeBatchesFifo()` method for FIFO component consumption
- Added `isBundleProductType()` helper

### Step 6: PurchasesController — Exclude Bundles/Services ✅
- Added `->purchasable()` scope to products query in `index()`
- Added `->purchasable()` scope to products query in `normalizePurchasePayload()`
- Added product type validation in `PurchaseStoreUpdateRequest` to reject bundle/service products

### Step 7: RolesAndPermissionsSeeder — Add Bundle Permissions ✅
- Added 6 bundle permissions to `manualPermissions` array
- Added `product_bundle-*` to `managerAllowed()`
- Added `product_bundle-sell` to `cashierAllowed()`
- Added `product_bundle-report-view` to `accountantAllowed()`

### Step 8: Reports Integration ✅
- Added `bundle` to `ReportRequest` product_type validation whitelist
- Excluded bundles from `InventoryReportQuery` (they have no direct stock)
- Sales reports work for bundles (cost_price auto-calculated from components)

## Files Modified

1. `app/Http/Controllers/system_management/ProductsController.php` — Bundle CRUD methods
2. `app/Http/Controllers/system_management/SalesController.php` — Bundle sale/return
3. `app/Http/Controllers/system_management/PosController.php` — Bundle POS integration
4. `app/Http/Controllers/system_management/PurchasesController.php` — Bundle exclusion
5. `app/Http/Requests/PurchaseStoreUpdateRequest.php` — Bundle type validation
6. `app/Http/Requests/ReportRequest.php` — Bundle type in whitelist
7. `app/Modules/Reports/Queries/InventoryReportQuery.php` — Bundle exclusion
8. `database/seeders/RolesAndPermissionsSeeder.php` — Bundle permissions
9. `resources/views/system_management/products/index.blade.php` — Bundle UI
10. `resources/views/system_management/products/modal.blade.php` — Bundle form
11. `resources/views/system_management/products/action.blade.php` — Bundle buttons
12. `resources/views/system_management/products/show.blade.php` — Bundle components tab
13. `routes/system_management.php` — Bundle routes

## Key Technical Decisions

- **No separate inventory for bundles** — stock is always derived from components
- **Bundle cost is auto-calculated** from component costs × quantities
- **Selling price minimum** is 1/3 of total component cost (validated in ProductBundleStoreUpdateRequest)
- **POS bundles don't select batches** — FIFO consumption is used for component batches
- **Sale cancellation** restores component stock, not bundle stock
- **Accounting** uses existing system — COGS is calculated from component costs
- **Permissions** follow the existing `product_bundle-*` naming convention