#!/bin/bash
set -e
set -o pipefail

if [ -z "${WILD_INSTANCE}" ]; then
    echo "ERROR: WILD_INSTANCE is not set"
    exit 1
fi

if [ -z "${WILD_API_DATA_DIR}" ]; then
    echo "ERROR: WILD_API_DATA_DIR is not set"
    exit 1
fi

if [ -z "${KUBECONFIG}" ]; then
    echo "ERROR: KUBECONFIG is not set"
    exit 1
fi

INSTANCE_DIR="${WILD_API_DATA_DIR}/instances/${WILD_INSTANCE}"
COREDNS_DIR="${INSTANCE_DIR}/apps/coredns"

echo "=== Setting up CoreDNS ==="
echo ""

echo "Using pre-compiled CoreDNS templates..."
if [ ! -f "${COREDNS_DIR}/kustomization.yaml" ]; then
    echo "ERROR: Compiled templates not found at ${COREDNS_DIR}"
    echo "Templates should be compiled before deployment."
    exit 1
fi

echo "Applying CoreDNS custom override configuration..."
kubectl apply -k "${COREDNS_DIR}/"

echo "Restarting CoreDNS pods to apply changes..."
kubectl rollout restart deployment/coredns -n kube-system
echo "Waiting for CoreDNS rollout to complete..."
kubectl rollout status deployment/coredns -n kube-system

echo ""
echo "CoreDNS configured successfully"
echo ""
echo "To verify the installation:"
echo "  kubectl get pods -n kube-system -l k8s-app=kube-dns"
echo "  kubectl get svc -n kube-system coredns"
echo "  kubectl describe svc -n kube-system coredns"
echo ""
echo "To view CoreDNS logs:"
echo "  kubectl logs -n kube-system -l k8s-app=kube-dns -f"