# Trust Invoice Implementation - Complete

## Summary
Successfully implemented the ability to create invoices for trusts with the same workflow as wills. Trusts with packages now automatically appear in the "Create Invoice" section on the admin invoices page.

## Changes Made

### 1. PaymentController (`app/Http/Controllers/PaymentController.php`)
- **Added import**: `use App\Models\Trust;`
- **Added method**: `createTrustInvoice(Trust $trust)` - displays the invoice creation form
  - Loads trust with client and package relationships
  - Renders `admin.trusts.invoice-create` template
  
- **Added method**: `storeTrustInvoice(Request $request, Trust $trust)` - processes invoice creation
  - Validates form inputs (type, amount, discount, tax, dates, notes)
  - Creates Invoice record with trust_id
  - Updates trust payment_status to 'pending'
  - Redirects to trust overview page with success message

### 2. Invoice Model (`app/Models/Invoice.php`)
- **Added to $fillable**: `'trust_id'`
- **Added relationship**: `trust()` - BelongsTo relationship with Trust model

### 3. Database Migration (`database/migrations/2026_07_14_081848_add_trust_id_to_invoices_table.php`)
- Added `trust_id` foreign key column to invoices table
- Supports cascade delete when trust is deleted

### 4. View Template (`resources/views/admin/trusts/invoice-create.blade.php`)
- Created new invoice creation form for trusts
- Based on will invoice template but adapted for trust context
- Shows trust type instead of will type
- Displays "Trust Setup Fee" as default invoice type
- Includes all fields: amount, discount, tax, dates, notes
- JavaScript for real-time total calculation
- Back button links to trust overview page

### 5. Invoices Index (`resources/views/admin/invoices/index.blade.php`)
- **Fixed button routing**: Changed from hardcoded URL to proper route helpers
- Now correctly differentiates between will and trust documents
- Wills use: `route('admin.wills.invoice.create', $doc->id)`
- Trusts use: `route('admin.trusts.invoice.create', $doc->id)`

## How It Works

### User Flow (Admin)
1. Admin goes to `/admin/invoices`
2. In "Create Invoice for Will or Trust" section, sees list of approved trusts with packages
3. Clicks "Create Invoice" button on a trust
4. Form appears with trust details pre-filled (package price as default amount)
5. Admin can modify amount, add discounts/taxes, select invoice type and dates
6. Clicks "Create Invoice"
7. Invoice is created and linked to trust
8. Admin is redirected to trust overview with success message

### Auto-Assignment
- When a trust is created, the `Trust` model's `boot()` method automatically calls `assignPackageByType()`
- This assigns a trust package (if one exists) so invoices can be created immediately
- No manual package assignment step needed

### Key Features
- ✅ Trusts can be invoiced at ANY status (not just completed)
- ✅ Only trusts WITH packages show in the invoice list
- ✅ Trusts WITHOUT packages show in a separate "Pending Package Assignment" section
- ✅ Same invoice form interface for both wills and trusts
- ✅ Real-time calculation of total with discounts and taxes
- ✅ Proper error handling and validation

## Files Modified
1. `app/Http/Controllers/PaymentController.php` - Added Trust import and 2 new methods
2. `app/Models/Invoice.php` - Added trust_id field, fillable, and relationship
3. `resources/views/admin/invoices/index.blade.php` - Fixed button routing logic
4. `database/migrations/2026_07_14_081848_add_trust_id_to_invoices_table.php` - Created new migration

## Files Created
1. `resources/views/admin/trusts/invoice-create.blade.php` - Trust invoice creation template

## Routes Configured (in routes/web.php)
- `GET /admin/trusts/{trust}/invoice/create` → `PaymentController@createTrustInvoice` (name: `admin.trusts.invoice.create`)
- `POST /admin/trusts/{trust}/invoice` → `PaymentController@storeTrustInvoice` (name: `admin.trusts.invoice.store`)

## Testing Steps
1. Navigate to `/admin/invoices`
2. Verify trusts with packages appear in the table
3. Click "Create Invoice" on a trust
4. Form should load with trust details
5. Enter invoice details and submit
6. Invoice should be created and visible in the "Existing Invoices" section
7. Trust should have `payment_status = 'pending'` after invoice creation

## Status
✅ **COMPLETE** - Trust invoicing feature is fully implemented and ready for use.