Gst Updates

app/Models/Invoice.php

@@ -31,6 +31,13 @@ class Invoice extends Model
         'pincode',
         'pdf_path',
         'notes',
+        // totals from charge groups
+        'charge_groups_total',
+        'grand_total_with_charges',
+        'tax_type',
+        'cgst_percent',
+        'sgst_percent',
+        'igst_percent',
     ];
 
     /****************************
@@ -57,16 +64,16 @@ class Invoice extends Model
         return $this->hasMany(InvoiceInstallment::class);
     }
 
-    // ✅ SINGLE, correct relation
     public function chargeGroups()
     {
-        return $this->hasMany(\App\Models\InvoiceChargeGroup::class, 'invoice_id');
+        return $this->hasMany(InvoiceChargeGroup::class, 'invoice_id');
     }
 
     /****************************
      * Helper Functions
      ****************************/
 
+    // (Items based calculateTotals वापरणार नाहीस तरी ठेवू शकतोस)
     public function calculateTotals()
     {
         $gst = ($this->final_amount * $this->gst_percent) / 100;
@@ -84,29 +91,32 @@ class Invoice extends Model
         return null;
     }
 
-    // ✅ Charge groups total accessor
+    // ✅ Charge groups base total (WITHOUT GST)
     public function getChargeGroupsTotalAttribute()
     {
-        // relation already loaded असेल तर collection वरून sum होईल
+        // base = total_charge sum
         return (float) $this->chargeGroups->sum('total_charge');
     }
 
-    // ✅ Grand total accessor (items + GST + charge groups)
+    // ✅ Grand total: Charge groups base + GST (items ignore)
     public function getGrandTotalWithChargesAttribute()
     {
-        return (float) ($this->final_amount_with_gst ?? 0) + $this->charge_groups_total;
+        $base = (float) ($this->charge_groups_total ?? 0);
+        $gst  = (float) ($this->gst_amount ?? 0);
+
+        return $base + $gst;
     }
 
-    public function totalPaid()
-{
-    return $this->installments->sum('amount');
-}
-
-
-public function remainingAmount()
-{
-    return $this->grand_total_with_charges - $this->totalPaid();
-}
-
-
+    public function totalPaid(): float
+    {
+        return (float) $this->installments()->sum('amount');
+    }
+
+    public function remainingAmount(): float
+    {
+        $grand = (float) $this->grand_total_with_charges;
+        $paid  = (float) $this->totalPaid();
+
+        return max(0, $grand - $paid);
+    }
 }

app/Models/InvoiceChargeGroup.php

@@ -13,6 +13,10 @@ class InvoiceChargeGroup extends Model
         'basis_value',
         'rate',
         'total_charge',
+
+        'tax_type',
+        'gst_percent',
+        'total_with_gst',
     ];
 
     public function invoice()