Stats management revamping

models/schema/stats.py

@@ -1,4 +1,5 @@
 import re
+from decimal import Decimal
 from datetime import datetime
 from typing import List, Optional
 
@@ -20,3 +21,45 @@ class MarketplaceStatsResponse(BaseModel):
     total_products: int
     unique_vendors: int
     unique_brands: int
+
+# ============================================================================
+# Customer Statistics
+# ============================================================================
+
+class CustomerStatsResponse(BaseModel):
+    """Schema for customer statistics."""
+
+    customer_id: int
+    total_orders: int
+    total_spent: Decimal
+    average_order_value: Decimal
+    last_order_date: Optional[datetime]
+    first_order_date: Optional[datetime]
+    lifetime_value: Decimal
+
+
+# ============================================================================
+# Order Statistics
+# ============================================================================
+
+class OrderStatsResponse(BaseModel):
+    """Schema for order statistics."""
+    total_orders: int
+    pending_orders: int
+    processing_orders: int
+    shipped_orders: int
+    delivered_orders: int
+    cancelled_orders: int
+    total_revenue: Decimal
+    average_order_value: Decimal
+
+# ============================================================================
+# Vendor Statistics
+# ============================================================================
+
+class VendorStatsResponse(BaseModel):
+    """Vendor statistics response schema."""
+    total: int = Field(..., description="Total number of vendors")
+    verified: int = Field(..., description="Number of verified vendors")
+    pending: int = Field(..., description="Number of pending verification vendors")
+    inactive: int = Field(..., description="Number of inactive vendors")