[update]: added interest to response and fixed defaults amounts due

app/api/services/provide_loan.py

@@ -1,3 +1,4 @@
+from gettext import install
 from flask import request, jsonify
 from marshmallow import ValidationError
 from app.api.integrations.kafka import KafkaIntegration
@@ -218,42 +219,75 @@ class ProvideLoanService(BaseService):
     def get_charge_schedule_items(cls, loan_charges, offer, loan_ref, amount, schedules):
         now = datetime.now(timezone.utc)
         due_date = now + timedelta(days=offer.tenor)
+        id_counter = 1
 
         charge_schedule_items = []
         
         charge_schedule_items.append({
-                "id": 1,
+                "id": id_counter,
                 "dueDate": due_date.isoformat(),
                 "amountDue": amount,
                 "componentName": "PRINCIPAL",
                 "startDate": now.isoformat(),
         })
-        
-        for idx, charge in enumerate(loan_charges, start=len(charge_schedule_items) + 1):
+
+        interest_amount = 0.0
+
+        for charge in loan_charges:
+
+            code = charge.code.upper()
+
+            if code == "INTEREST":
+                interest_amount = float(charge.amount)
+                continue 
+
+
             item = {
-                "id": idx,
+                "id": id_counter,
                 "dueDate": charge.due_date.isoformat(),
                 "amountDue": float(charge.amount),
                 "componentName": charge.code.upper(),  # e.g. INTEREST, MGMT_FEE, VAT_FEE
                 "startDate": charge.created_at.isoformat(),
             }
 
-            if charge.code.upper() == "INTEREST":
+            if charge.code.upper() == "VAT":
                 item["loanRef"] = loan_ref
 
             charge_schedule_items.append(item)
+            id_counter += 1
 
 
-        for idx, schedule in enumerate(schedules, start=len(charge_schedule_items) + 1):
-            item = {
-                "id": idx,
+        num_schedules = len(schedules)
+        if num_schedules > 0:
+            principal_per_schedule = amount / num_schedules
+        else:
+            principal_per_schedule = 0.0
+
+
+        for schedule in schedules:
+            default = {
+                "id":  id_counter,
+                "installmentNo": schedule.installment_number,
                 "dueDate": schedule.due_date.isoformat(),
-                "amountDue": float(schedule.installment_amount),
+                "amountDue": round(principal_per_schedule, 2),
                 "componentName": "DEFAULT",
                 "startDate": schedule.created_at.isoformat(),
+            }
+
+            charge_schedule_items.append(default)
+            id_counter += 1
+
+            interest = {
+                "id": id_counter,
+                "dueDate": schedule.due_date.isoformat(),
+                "amountDue": round(interest_amount, 2),
+                "componentName": "INTEREST",
+                "startDate": schedule.created_at.isoformat(),
                 "loanRef": loan_ref
             }
-            charge_schedule_items.append(item)
+
+            charge_schedule_items.append(interest)
+            id_counter += 1
 
         return charge_schedule_items