#!/bin/bash

# Load shared libraries
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../lib/init.sh"

# Script to help migrate projects to shared monitoring stack

set -e

PROJECT_NAME="${1:-}"
NAMESPACE="${2:-default}"

if [ -z "$PROJECT_NAME" ]; then
  echo "📊 Monitoring Migration Helper"
  echo ""
  echo "Usage: $0 <project-name> [namespace]"
  echo ""
  echo "This script helps migrate a project to use the shared monitoring stack."
  echo ""
  exit 1
fi

echo "📊 Migrating $PROJECT_NAME to shared monitoring stack..."

# Check if ServiceMonitor CRD exists
if ! kubectl get crd servicemonitors.monitoring.coreos.com &>/dev/null; then
  echo "⚠️  ServiceMonitor CRD not found"
  echo "   → Ensure Prometheus operator is installed"
  exit 1
fi

# Create ServiceMonitor template
cat > "/tmp/${PROJECT_NAME}-servicemonitor.yaml" << EOF
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: ${PROJECT_NAME}
  namespace: ${NAMESPACE}
  labels:
    app: ${PROJECT_NAME}
spec:
  selector:
    matchLabels:
      app: ${PROJECT_NAME}
  endpoints:
    - port: metrics
      path: /metrics
      interval: 30s
EOF

echo "✅ Created ServiceMonitor template: /tmp/${PROJECT_NAME}-servicemonitor.yaml"
echo ""
echo "📝 Next steps:"
echo "   1. Ensure your service exposes metrics on /metrics endpoint"
echo "   2. Add 'metrics' port to your service"
echo "   3. Review and apply ServiceMonitor:"
echo "      kubectl apply -f /tmp/${PROJECT_NAME}-servicemonitor.yaml"
echo ""
echo "📖 See docs/K8S_MIGRATION_GUIDE.md for detailed instructions"