Add whatsapp feature

services/tenant/app/schemas/tenant_settings.py

@@ -218,6 +218,58 @@ class MLInsightsSettings(BaseModel):
     ml_confidence_threshold: float = Field(0.80, ge=0.0, le=1.0, description="Minimum confidence threshold for ML recommendations")
 
 
+class NotificationSettings(BaseModel):
+    """Notification and communication settings"""
+    # WhatsApp Configuration
+    whatsapp_enabled: bool = Field(False, description="Enable WhatsApp notifications for this tenant")
+    whatsapp_phone_number_id: str = Field("", description="Meta WhatsApp Phone Number ID")
+    whatsapp_access_token: str = Field("", description="Meta WhatsApp Access Token (encrypted)")
+    whatsapp_business_account_id: str = Field("", description="Meta WhatsApp Business Account ID")
+    whatsapp_api_version: str = Field("v18.0", description="WhatsApp Cloud API version")
+    whatsapp_default_language: str = Field("es", description="Default language for WhatsApp templates")
+
+    # Email Configuration
+    email_enabled: bool = Field(True, description="Enable email notifications for this tenant")
+    email_from_address: str = Field("", description="Custom from email address (optional)")
+    email_from_name: str = Field("", description="Custom from name (optional)")
+    email_reply_to: str = Field("", description="Reply-to email address (optional)")
+
+    # Notification Preferences
+    enable_po_notifications: bool = Field(True, description="Enable purchase order notifications")
+    enable_inventory_alerts: bool = Field(True, description="Enable inventory alerts")
+    enable_production_alerts: bool = Field(True, description="Enable production alerts")
+    enable_forecast_alerts: bool = Field(True, description="Enable forecast alerts")
+
+    # Notification Channels
+    po_notification_channels: list[str] = Field(["email"], description="Channels for PO notifications (email, whatsapp)")
+    inventory_alert_channels: list[str] = Field(["email"], description="Channels for inventory alerts")
+    production_alert_channels: list[str] = Field(["email"], description="Channels for production alerts")
+    forecast_alert_channels: list[str] = Field(["email"], description="Channels for forecast alerts")
+
+    @validator('po_notification_channels', 'inventory_alert_channels', 'production_alert_channels', 'forecast_alert_channels')
+    def validate_channels(cls, v):
+        """Validate that channels are valid"""
+        valid_channels = ["email", "whatsapp", "sms", "push"]
+        for channel in v:
+            if channel not in valid_channels:
+                raise ValueError(f"Invalid channel: {channel}. Must be one of {valid_channels}")
+        return v
+
+    @validator('whatsapp_phone_number_id')
+    def validate_phone_number_id(cls, v, values):
+        """Validate phone number ID is provided if WhatsApp is enabled"""
+        if values.get('whatsapp_enabled') and not v:
+            raise ValueError("whatsapp_phone_number_id is required when WhatsApp is enabled")
+        return v
+
+    @validator('whatsapp_access_token')
+    def validate_access_token(cls, v, values):
+        """Validate access token is provided if WhatsApp is enabled"""
+        if values.get('whatsapp_enabled') and not v:
+            raise ValueError("whatsapp_access_token is required when WhatsApp is enabled")
+        return v
+
+
 # ================================================================
 # REQUEST/RESPONSE SCHEMAS
 # ================================================================
@@ -237,6 +289,7 @@ class TenantSettingsResponse(BaseModel):
     moq_settings: MOQSettings
     supplier_selection_settings: SupplierSelectionSettings
     ml_insights_settings: MLInsightsSettings
+    notification_settings: NotificationSettings
     created_at: datetime
     updated_at: datetime
 
@@ -257,6 +310,7 @@ class TenantSettingsUpdate(BaseModel):
     moq_settings: Optional[MOQSettings] = None
     supplier_selection_settings: Optional[SupplierSelectionSettings] = None
     ml_insights_settings: Optional[MLInsightsSettings] = None
+    notification_settings: Optional[NotificationSettings] = None
 
 
 class CategoryUpdateRequest(BaseModel):