#!/bin/bash
# Quick deployment script for Pager application

set -e

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# Configuration
NAMESPACE="learn"
HARBOR_URL="192.168.1.83:8080"
HARBOR_PROJECT="pager"

echo -e "${GREEN}🚀 Pager Application Deployment Script${NC}"
echo "============================================"
echo ""

# Function to print section headers
section() {
    echo ""
    echo -e "${YELLOW}>>> $1${NC}"
}

# Function to check command exists
check_command() {
    if ! command -v $1 &> /dev/null; then
        echo -e "${RED}❌ Error: $1 is not installed${NC}"
        exit 1
    fi
}

# Check prerequisites
section "Checking prerequisites"
check_command kubectl
check_command docker
echo -e "${GREEN}✅ All prerequisites met${NC}"

# Check kubectl connectivity
section "Checking Kubernetes connectivity"
if ! kubectl cluster-info &> /dev/null; then
    echo -e "${RED}❌ Error: Cannot connect to Kubernetes cluster${NC}"
    exit 1
fi
echo -e "${GREEN}✅ Connected to Kubernetes cluster${NC}"

# Create namespace if not exists
section "Creating namespace: $NAMESPACE"
if kubectl get namespace $NAMESPACE &> /dev/null; then
    echo -e "${YELLOW}⚠️  Namespace $NAMESPACE already exists${NC}"
else
    kubectl apply -f k8s/namespace.yaml
    echo -e "${GREEN}✅ Namespace created${NC}"
fi

# Deploy PostgreSQL
section "Deploying PostgreSQL"
kubectl apply -f k8s/postgres.yaml
echo "⏳ Waiting for PostgreSQL to be ready..."
kubectl wait --for=condition=ready pod -l app=pager-postgres -n $NAMESPACE --timeout=300s || true
echo -e "${GREEN}✅ PostgreSQL deployed${NC}"

# Deploy secrets and config
section "Deploying secrets and configuration"
kubectl apply -f k8s/secret.yaml
kubectl apply -f k8s/configmap.yaml
echo -e "${GREEN}✅ Secrets and ConfigMaps deployed${NC}"

# Check if we should deploy application
read -p "Do you want to deploy application pods? (requires images in Harbor) [y/N]: " -n 1 -r
echo
if [[ $REPLY =~ ^[Yy]$ ]]; then
    section "Deploying application"

    # Get current git commit
    GIT_SHA=$(git rev-parse --short HEAD)
    IMAGE_TAG="master-${GIT_SHA}"

    echo "Using image tag: $IMAGE_TAG"

    # Update deployment with image tag
    sed "s|IMAGE_TAG|$IMAGE_TAG|g" k8s/deployment.yaml > /tmp/deployment-temp.yaml

    kubectl apply -f /tmp/deployment-temp.yaml
    kubectl apply -f k8s/service.yaml
    kubectl apply -f k8s/ingress.yaml

    rm /tmp/deployment-temp.yaml

    echo "⏳ Waiting for deployments to be ready..."
    kubectl rollout status deployment/pager-backend -n $NAMESPACE --timeout=300s || true
    kubectl rollout status deployment/pager-frontend -n $NAMESPACE --timeout=300s || true

    echo -e "${GREEN}✅ Application deployed${NC}"
else
    echo -e "${YELLOW}⏭️  Skipping application deployment${NC}"
fi

# Deploy monitoring
read -p "Do you want to deploy monitoring (ServiceMonitor)? [y/N]: " -n 1 -r
echo
if [[ $REPLY =~ ^[Yy]$ ]]; then
    section "Deploying monitoring"
    kubectl apply -f k8s/monitoring/servicemonitor.yaml
    echo -e "${GREEN}✅ Monitoring deployed${NC}"
fi

# Show deployment status
section "Deployment Status"
echo ""
echo "📦 Pods:"
kubectl get pods -n $NAMESPACE

echo ""
echo "🌐 Services:"
kubectl get svc -n $NAMESPACE

echo ""
echo "🔌 Ingress:"
kubectl get ingress -n $NAMESPACE

echo ""
echo -e "${GREEN}🎉 Deployment Complete!${NC}"
echo ""
echo "Next steps:"
echo "1. Add to /etc/hosts: 192.168.1.83 pager.learn.local"
echo "2. Access frontend: http://pager.learn.local"
echo "3. Access API docs: http://pager.learn.local/api/docs"
echo "4. View logs: kubectl logs -f -l app=pager-backend -n $NAMESPACE"
echo "5. Monitor in Grafana"
echo ""