{
  "name": "ActivityLog",
  "type": "object",
  "properties": {
    "title": {
      "type": "string",
      "description": "Notification title (e.g., 'Event Rescheduled', 'Invoice Paid')"
    },
    "description": {
      "type": "string",
      "description": "Detailed description of the activity"
    },
    "activity_type": {
      "type": "string",
      "enum": [
        "event_created",
        "event_updated",
        "event_rescheduled",
        "event_canceled",
        "staff_assigned",
        "staff_removed",
        "invoice_paid",
        "invoice_created",
        "message_received",
        "order_created",
        "order_updated"
      ],
      "description": "Type of activity"
    },
    "related_entity_type": {
      "type": "string",
      "enum": [
        "event",
        "staff",
        "invoice",
        "message",
        "order",
        "user"
      ],
      "description": "Type of related entity"
    },
    "related_entity_id": {
      "type": "string",
      "description": "ID of the related entity"
    },
    "action_link": {
      "type": "string",
      "description": "Link to view the related item (e.g., 'EventDetail?id=123')"
    },
    "action_label": {
      "type": "string",
      "description": "Label for the action button (e.g., 'View Event', 'View Invoice')"
    },
    "user_id": {
      "type": "string",
      "description": "ID of the user this notification is for"
    },
    "is_read": {
      "type": "boolean",
      "default": false,
      "description": "Whether the notification has been read"
    },
    "icon_type": {
      "type": "string",
      "enum": [
        "calendar",
        "user",
        "invoice",
        "message",
        "alert",
        "check"
      ],
      "description": "Icon to display for this notification"
    },
    "icon_color": {
      "type": "string",
      "enum": [
        "blue",
        "red",
        "green",
        "yellow",
        "purple"
      ],
      "default": "blue",
      "description": "Color theme for the icon"
    }
  },
  "required": [
    "title",
    "description",
    "activity_type",
    "user_id"
  ]
}