fix day

order-events/app/utils.py

@@ -1,35 +1,39 @@
 import calendar
-from datetime import date
-
-from layercake.dateutils import now
+from datetime import date, timedelta
 
 
 def get_billing_period(
     billing_day: int,
-    year: int | None = None,
-    month: int | None = None,
+    date_: date,
 ) -> tuple[date, date]:
-    today = now()
-    year_ = year or today.year
-    month_ = month or today.month
+    # Determine the anchor month and year
+    if date_.day >= billing_day:
+        anchor_month = date_.month
+        anchor_year = date_.year
+    else:
+        # Move to previous month
+        if date_.month == 1:
+            anchor_month = 12
+            anchor_year = date_.year - 1
+        else:
+            anchor_month = date_.month - 1
+            anchor_year = date_.year
 
-    _, last_day = calendar.monthrange(year_, month_)
-    start_day = min(billing_day, last_day)
-    start_date = date(year_, month_, start_day)
+    # Calculate start date
+    _, last_day = calendar.monthrange(anchor_year, anchor_month)
+    start_date = date(anchor_year, anchor_month, min(billing_day, last_day))
 
-    if month_ == 12:
+    # Calculate next month and year
+    if anchor_month == 12:
         next_month = 1
-        next_year = year_ + 1
+        next_year = anchor_year + 1
     else:
-        next_month = month_ + 1
-        next_year = year_
+        next_month = anchor_month + 1
+        next_year = anchor_year
 
-    _, last_day_next_month = calendar.monthrange(next_year, next_month)
-    end_day = min(billing_day, last_day_next_month) - 1
-
-    if end_day == 0:
-        end_date = date(year_, month_, last_day)
-    else:
-        end_date = date(next_year, next_month, end_day)
+    # Calculate end date
+    _, next_last_day = calendar.monthrange(next_year, next_month)
+    end_day = min(billing_day, next_last_day)
+    end_date = date(next_year, next_month, end_day) - timedelta(days=1)
 
     return start_date, end_date