#!/bin/bash

# Auto-Deploy Script für Portfolio
# Führt automatisch Tests, Build und Deployment durch

set -e

# Configuration
PROJECT_NAME="portfolio"
CONTAINER_NAME="portfolio-app"
IMAGE_NAME="portfolio-app"
PORT=3000
BACKUP_PORT=3001
LOG_FILE="./logs/portfolio-deploy.log"

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Logging function
log() {
    echo -e "${BLUE}[$(date +'%Y-%m-%d %H:%M:%S')]${NC} $1" | tee -a "$LOG_FILE"
}

error() {
    echo -e "${RED}[ERROR]${NC} $1" | tee -a "$LOG_FILE"
}

success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1" | tee -a "$LOG_FILE"
}

warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1" | tee -a "$LOG_FILE"
}

# Check if running as root (skip in CI environments)
if [[ $EUID -eq 0 ]] && [[ -z "$CI" ]]; then
   error "This script should not be run as root (use CI=true to override)"
   exit 1
fi

# Check if Docker is running
if ! sudo docker info > /dev/null 2>&1; then
    error "Docker is not running. Please start Docker and try again."
    exit 1
fi

# Check if we're in the right directory
if [ ! -f "package.json" ] || [ ! -f "Dockerfile" ]; then
    error "Please run this script from the project root directory"
    exit 1
fi

log "🚀 Starting automatic deployment for $PROJECT_NAME"

# Step 1: Code Quality Checks
log "📋 Step 1: Running code quality checks..."

# Check for uncommitted changes
if [ -n "$(git status --porcelain)" ]; then
    warning "You have uncommitted changes. Committing them..."
    git add .
    git commit -m "Auto-commit before deployment $(date)"
fi

# Pull latest changes
log "📥 Pulling latest changes..."
git pull origin production || {
    error "Failed to pull latest changes"
    exit 1
}

# Run linting
log "🔍 Running ESLint..."
npm run lint || {
    error "ESLint failed. Please fix the issues before deploying."
    exit 1
}

# Run tests
log "🧪 Running tests..."
npm run test || {
    error "Tests failed. Please fix the issues before deploying."
    exit 1
}

success "✅ Code quality checks passed"

# Step 2: Build Application
log "🔨 Step 2: Building application..."

# Build Next.js application
log "📦 Building Next.js application..."
npm run build || {
    error "Build failed"
    exit 1
}

success "✅ Application built successfully"

# Step 3: Docker Operations
log "🐳 Step 3: Docker operations..."

# Build Docker image
log "🏗️ Building Docker image..."
sudo docker build -t "$IMAGE_NAME:latest" . || {
    error "Docker build failed"
    exit 1
}

# Tag with timestamp
TIMESTAMP=$(date +%Y%m%d-%H%M%S)
sudo docker tag "$IMAGE_NAME:latest" "$IMAGE_NAME:$TIMESTAMP"

success "✅ Docker image built successfully"

# Step 4: Deployment
log "🚀 Step 4: Deploying application..."

# Check if container is running
if [ "$(sudo docker inspect -f '{{.State.Running}}' "$CONTAINER_NAME" 2>/dev/null)" = "true" ]; then
    log "📦 Stopping existing container..."
    sudo docker stop "$CONTAINER_NAME" || true
    sudo docker rm "$CONTAINER_NAME" || true
fi

# Check if port is available
if lsof -Pi :$PORT -sTCP:LISTEN -t >/dev/null ; then
    warning "Port $PORT is in use. Trying backup port $BACKUP_PORT"
    DEPLOY_PORT=$BACKUP_PORT
else
    DEPLOY_PORT=$PORT
fi

# Start new container
log "🚀 Starting new container on port $DEPLOY_PORT..."
sudo docker run -d \
    --name "$CONTAINER_NAME" \
    --restart unless-stopped \
    -p "$DEPLOY_PORT:3000" \
    -e NODE_ENV=production \
    "$IMAGE_NAME:latest" || {
    error "Failed to start container"
    exit 1
}

# Wait for container to be ready
log "⏳ Waiting for container to be ready..."
sleep 10

# Health check
log "🏥 Performing health check..."
HEALTH_CHECK_TIMEOUT=60
HEALTH_CHECK_INTERVAL=2
ELAPSED=0

while [ $ELAPSED -lt $HEALTH_CHECK_TIMEOUT ]; do
    if curl -f "http://localhost:$DEPLOY_PORT/api/health" > /dev/null 2>&1; then
        success "✅ Application is healthy!"
        break
    fi
    
    sleep $HEALTH_CHECK_INTERVAL
    ELAPSED=$((ELAPSED + HEALTH_CHECK_INTERVAL))
    echo -n "."
done

if [ $ELAPSED -ge $HEALTH_CHECK_TIMEOUT ]; then
    error "Health check timeout. Application may not be running properly."
    log "Container logs:"
    docker logs "$CONTAINER_NAME" --tail=50
    exit 1
fi

# Step 5: Verification
log "✅ Step 5: Verifying deployment..."

# Test main page
if curl -f "http://localhost:$DEPLOY_PORT/" > /dev/null 2>&1; then
    success "✅ Main page is accessible"
else
    error "❌ Main page is not accessible"
    exit 1
fi

# Show container status
log "📊 Container status:"
sudo docker ps --filter "name=$CONTAINER_NAME" --format "table {{.Names}}\t{{.Status}}\t{{.Ports}}"

# Show resource usage
log "📈 Resource usage:"
sudo docker stats --no-stream --format "table {{.Container}}\t{{.CPUPerc}}\t{{.MemUsage}}" "$CONTAINER_NAME"

# Step 6: Cleanup
log "🧹 Step 6: Cleaning up old images..."

# Remove old images (keep last 3 versions)
sudo docker images "$IMAGE_NAME" --format "table {{.Tag}}\t{{.ID}}" | tail -n +2 | head -n -3 | awk '{print $2}' | xargs -r sudo docker rmi || {
    warning "No old images to remove"
}

# Clean up unused Docker resources
sudo docker system prune -f --volumes || {
    warning "Failed to clean up Docker resources"
}

# Final success message
success "🎉 Deployment completed successfully!"
log "🌐 Application is available at: http://localhost:$DEPLOY_PORT"
log "🏥 Health check endpoint: http://localhost:$DEPLOY_PORT/api/health"
log "📊 Container name: $CONTAINER_NAME"
log "📝 Logs: sudo docker logs $CONTAINER_NAME"

# Update deployment log
echo "$(date): Deployment successful - Port: $DEPLOY_PORT - Image: $IMAGE_NAME:$TIMESTAMP" >> "$LOG_FILE"

exit 0