#!/bin/bash
# Delete Kubernetes objects in reverse order

# Check if REGION environment variable is set
if [ -z "$REGION" ]; then
    # Default region if not set
    export REGION="westeurope"
    echo "No region specified. Using default region: $REGION"
else
    echo "Stopping application in region: $REGION"
fi

# For AKS deployments, make sure we're connected to the right cluster
if command -v az &> /dev/null; then
    echo "Checking AKS connection for region $REGION..."
    # You might need to adjust these parameters based on your specific Azure setup
    RESOURCE_GROUP="flask-rg-$REGION"
    CLUSTER_NAME="flask-aks-$REGION"
    
    # Try to connect to the Azure cluster
    if ! az aks get-credentials --resource-group $RESOURCE_GROUP --name $CLUSTER_NAME --overwrite-existing 2>/dev/null; then
        echo "Warning: Could not connect to AKS cluster in $REGION. Continuing with current kubectl context."
    else
        echo "Successfully connected to AKS cluster in $REGION"
    fi
fi

echo "Stopping application..."

# Delete Service first to stop incoming traffic
kubectl delete -f service.yaml 2>/dev/null || echo "Service could not be deleted or does not exist."

# Delete StatefulSet and wait for pods to terminate
kubectl delete -f statefulset.yaml 2>/dev/null || echo "StatefulSet could not be deleted or does not exist."

# Delete Deployment
kubectl delete -f deployment.yaml 2>/dev/null || echo "Deployment could not be deleted or does not exist."

# Delete PostgreSQL objects
kubectl delete -f postgres-service.yaml 2>/dev/null || echo "PostgreSQL service could not be deleted or does not exist."
kubectl delete -f postgres-deployment.yaml 2>/dev/null || echo "PostgreSQL deployment could not be deleted or does not exist."

# Wait for pods to terminate
echo "Waiting for pods to terminate..."
kubectl wait --for=delete pod --selector=app=web-app -n my-app --timeout=60s 2>/dev/null || true
kubectl wait --for=delete pod --selector=app=stateful-app -n my-app --timeout=60s 2>/dev/null || true
kubectl wait --for=delete pod --selector=app=postgres -n my-app --timeout=60s 2>/dev/null || true

# Delete PersistentVolume and PersistentVolumeClaim
kubectl delete -f persistent-storage.yaml 2>/dev/null || echo "PersistentVolume and PersistentVolumeClaim could not be deleted or do not exist."

# Delete Namespace (this will delete all resources in the namespace)
kubectl delete -f namespace.yaml 2>/dev/null || echo "Namespace could not be deleted or does not exist."

echo "Application stopped in region $REGION: All Kubernetes objects have been deleted."