#!/bin/bash
# Script to help migrate projects to shared Kubernetes cluster

set -e

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

PROJECT_NAME="${1:-}"

if [ -z "$PROJECT_NAME" ]; then
  log_heading "☸️  Kubernetes Migration Helper"
  echo ""
  echo "Usage: $0 <project-name>"
  echo ""
  echo "This script helps migrate a project to the shared Kubernetes cluster."
  echo ""
  exit 1
fi

# Validate input
validate_project_name "$PROJECT_NAME"

NAMESPACE="${PROJECT_NAME}"

log_heading "☸️  Migrating $PROJECT_NAME to shared Kubernetes cluster..."

# Create namespace using Terraform module or kubectl
echo "📦 Creating namespace: $NAMESPACE"

cat > "/tmp/${PROJECT_NAME}-namespace.yaml" << EOF
apiVersion: v1
kind: Namespace
metadata:
  name: ${NAMESPACE}
  labels:
    app: ${PROJECT_NAME}
    managed: terraform
spec: {}
EOF

# Create basic deployment template
cat > "/tmp/${PROJECT_NAME}-deployment.yaml" << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  name: ${PROJECT_NAME}
  namespace: ${NAMESPACE}
spec:
  replicas: 2
  selector:
    matchLabels:
      app: ${PROJECT_NAME}
  template:
    metadata:
      labels:
        app: ${PROJECT_NAME}
    spec:
      containers:
        - name: ${PROJECT_NAME}
          image: ${PROJECT_NAME}:latest
          ports:
            - containerPort: 8080
              name: http
          resources:
            requests:
              memory: "256Mi"
              cpu: "100m"
            limits:
              memory: "512Mi"
              cpu: "500m"
          livenessProbe:
            httpGet:
              path: /health
              port: 8080
            initialDelaySeconds: 30
            periodSeconds: 10
          readinessProbe:
            httpGet:
              path: /ready
              port: 8080
            initialDelaySeconds: 5
            periodSeconds: 5
EOF

# Create service template
cat > "/tmp/${PROJECT_NAME}-service.yaml" << EOF
apiVersion: v1
kind: Service
metadata:
  name: ${PROJECT_NAME}
  namespace: ${NAMESPACE}
spec:
  selector:
    app: ${PROJECT_NAME}
  ports:
    - port: 80
      targetPort: 8080
      protocol: TCP
      name: http
EOF

# Create ingress template
cat > "/tmp/${PROJECT_NAME}-ingress.yaml" << EOF
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ${PROJECT_NAME}
  namespace: ${NAMESPACE}
  annotations:
    kubernetes.io/ingress.class: nginx
    cert-manager.io/cluster-issuer: letsencrypt-prod
spec:
  tls:
    - hosts:
        - ${PROJECT_NAME}.example.com
      secretName: ${PROJECT_NAME}-tls
  rules:
    - host: ${PROJECT_NAME}.example.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: ${PROJECT_NAME}
                port:
                  number: 80
EOF

log_success "Created migration templates:"
log_info "   - /tmp/${PROJECT_NAME}-namespace.yaml"
log_info "   - /tmp/${PROJECT_NAME}-deployment.yaml"
log_info "   - /tmp/${PROJECT_NAME}-service.yaml"
log_info "   - /tmp/${PROJECT_NAME}-ingress.yaml"
echo ""
log_step "Next steps:"
log_info "   1. Review and customize templates"
log_info "   2. Update image name and configuration"
log_info "   3. Apply resources:"
log_info "      kubectl apply -f /tmp/${PROJECT_NAME}-*.yaml"
echo ""
log_info "📖 See docs/K8S_MIGRATION_GUIDE.md for detailed instructions"