export default defineEventHandler(async (event) => {
  try {
    // TODO: Implement proper user segments table
    // For now, returning mock data since notification tables don't exist in current schema
    
    const mockSegments = [
      {
        label: "New Users",
        value: "new_users",
        description: "Users registered within last 30 days",
        criteria: { registration_days: 30 }
      },
      {
        label: "Active Users",
        value: "active_users",
        description: "Users active in last 7 days",
        criteria: { last_activity_days: 7 }
      },
      {
        label: "Premium Subscribers",
        value: "premium_users",
        description: "Users with premium subscription",
        criteria: { subscription_type: "premium" }
      },
      {
        label: "Inactive Users",
        value: "inactive_users",
        description: "Users not active in 30+ days",
        criteria: { inactive_days: 30 }
      },
      {
        label: "High-Value Customers",
        value: "high_value",
        description: "Customers with high lifetime value",
        criteria: { min_order_value: 1000 }
      }
    ];
    
    return {
      success: true,
      data: mockSegments
    }
  } catch (error) {
    console.error('Error fetching segments:', error)
    throw createError({
      statusCode: 500,
      statusMessage: 'Failed to fetch segments'
    })
  }
})