private DestinationState PickOneDestination()

in src/dotnet/AzureAI.Proxy/ReverseProxy/RetryMiddleware.cs [62:117]
44 lines of code
7 McCabe index (conditional complexity)

    private DestinationState PickOneDestination(IReverseProxyFeature reverseProxyFeature)
    {
        var allDestinations = reverseProxyFeature.AllDestinations;
        
        var selectedPriority = int.MaxValue;
        var availableBackends = new List<int>();

        for (var i = 0; i < allDestinations.Count; i++)
        {
            var destination = allDestinations[i];

            if (destination.Health.Passive != DestinationHealth.Unhealthy)
            {
                var destinationPriority = int.Parse(destination.Model.Config.Metadata["priority"]);

                if (destinationPriority < selectedPriority)
                {
                    selectedPriority = destinationPriority;
                    availableBackends.Clear();
                    availableBackends.Add(i);
                }
                else if (destinationPriority == selectedPriority)
                {
                    availableBackends.Add(i);
                }
            }
        }

        int backendIndex;

       
        if (availableBackends.Count > 0)
        {
            if (availableBackends.Count == 1)
            {
                //Returns the only available backend if we have only one available
                backendIndex = availableBackends[0];
            }
            else
            {
                //Returns a random backend from the list if we have more than one available with the same priority
                backendIndex = availableBackends[Random.Shared.Next(0, availableBackends.Count)];
            }
        }
        else
        {
            //Returns a random  backend if all backends are unhealthy
            _logger.LogWarning($"All backends are unhealthy. Picking a random backend...");
            backendIndex = Random.Shared.Next(0, allDestinations.Count);
        }

        var pickedDestination = allDestinations[backendIndex];
        _logger.LogInformation($"Picked backend: {pickedDestination.Model.Config.Address}");

        return pickedDestination;
    }