#!/bin/bash
# Script to add OpenTelemetry monitoring configuration to all service deployments
# This adds the necessary environment variables for SigNoz integration
# Note: No Prometheus annotations needed - all metrics go via OTLP push

set -e

SERVICES=(
  "ai-insights"
  "distribution"
  "external"
  "forecasting"
  "inventory"
  "notification"
  "orchestrator"
  "orders"
  "pos"
  "procurement"
  "production"
  "recipes"
  "sales"
  "suppliers"
  "tenant"
  "training"
  "frontend"
)

echo "Adding OpenTelemetry configuration to all services..."
echo ""

for service in "${SERVICES[@]}"; do
  SERVICE_FILE="infrastructure/kubernetes/base/components/${service}/${service}-service.yaml"

  if [ ! -f "$SERVICE_FILE" ]; then
    echo "⚠️  Skipping $service (file not found: $SERVICE_FILE)"
    continue
  fi

  echo "📝 Processing $service-service..."

  # Check if already has OTEL env vars
  if grep -q "OTEL_COLLECTOR_ENDPOINT" "$SERVICE_FILE"; then
    echo "  ✓ Already has OpenTelemetry configuration"
  else
    echo "  + Adding OpenTelemetry environment variables"
    # Create a YAML patch
    cat > "/tmp/${service}-otel-patch.yaml" << 'EOF'
        env:
        # OpenTelemetry Configuration
        - name: OTEL_COLLECTOR_ENDPOINT
          value: "http://signoz-otel-collector.signoz.svc.cluster.local:4318"
        - name: OTEL_EXPORTER_OTLP_ENDPOINT
          value: "http://signoz-otel-collector.signoz.svc.cluster.local:4318"
        - name: OTEL_SERVICE_NAME
          value: "SERVICE_NAME_PLACEHOLDER"
        - name: ENABLE_TRACING
          value: "true"
        # Logging Configuration
        - name: OTEL_LOGS_EXPORTER
          value: "otlp"
        - name: OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED
          value: "true"
        # Metrics Configuration (all via OTLP, no Prometheus)
        - name: ENABLE_OTEL_METRICS
          value: "true"
        - name: ENABLE_SYSTEM_METRICS
          value: "true"
EOF
    # Replace placeholder with actual service name
    sed -i.bak "s/SERVICE_NAME_PLACEHOLDER/${service}-service/g" "/tmp/${service}-otel-patch.yaml"

    echo "  ⚠️  Manual step required: Add env vars from /tmp/${service}-otel-patch.yaml"
    echo "     Insert after 'ports:' section and before 'envFrom:' in $SERVICE_FILE"
  fi

  echo "  ✅ $service-service processed"
  echo ""
done

echo ""
echo "✅ Monitoring configuration prepared for all services!"
echo ""
echo "Next steps:"
echo "1. Review the changes and manually add env vars from /tmp/*-otel-patch.yaml files"
echo "2. Update SigNoz: helm upgrade signoz signoz/signoz -n signoz -f infrastructure/helm/signoz-values-dev.yaml"
echo "3. Restart services: kubectl rollout restart deployment -n bakery-ia"
echo "4. Check SigNoz UI at https://monitoring.bakery-ia.local for incoming data"
echo ""
echo "What metrics you'll see:"
echo "  - HTTP requests (method, endpoint, status code, duration)"
echo "  - System metrics (CPU, memory usage per process)"
echo "  - System-wide metrics (total CPU, memory, disk I/O, network I/O)"
echo "  - Custom business metrics (registrations, orders, etc.)"
echo "  - All pushed via OpenTelemetry OTLP (no Prometheus scraping)"