#!/bin/bash
set -e

# ============================================================================
# Production Deployment Script
# ============================================================================
# Based on .gitea/workflows/deploy-production.yml
# Deploys to production environment at michaelschiemer.de
# ============================================================================

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

# Configuration
REGISTRY="${REGISTRY:-localhost:5000}"
IMAGE_NAME="${IMAGE_NAME:-framework}"
IMAGE_TAG="${IMAGE_TAG:-latest}"
COMPOSE_PROJECT_NAME="framework-production"

# Remote server configuration (from environment or defaults)
REMOTE_USER="${PRODUCTION_USER:-deploy}"
REMOTE_HOST="${PRODUCTION_HOST:-michaelschiemer.de}"
REMOTE_PORT="${PRODUCTION_SSH_PORT:-22}"
REMOTE_PATH="/opt/framework-production"

# Deployment options
SKIP_BACKUP="${SKIP_BACKUP:-false}"
FORCE_REBUILD="${FORCE_REBUILD:-false}"

# Validation
if [ -z "$REMOTE_HOST" ]; then
    echo -e "${RED}❌ Error: PRODUCTION_HOST environment variable is required${NC}"
    echo "Export PRODUCTION_HOST before running this script:"
    echo "  export PRODUCTION_HOST=michaelschiemer.de"
    exit 1
fi

echo "=================================================="
echo "🚀 Starting Production Deployment"
echo "=================================================="
echo "Registry: ${REGISTRY}"
echo "Image: ${IMAGE_NAME}:${IMAGE_TAG}"
echo "Remote: ${REMOTE_USER}@${REMOTE_HOST}:${REMOTE_PORT}"
echo "Path: ${REMOTE_PATH}"
echo "Skip Backup: ${SKIP_BACKUP}"
echo ""

# Step 1: Build Docker image
echo -e "${GREEN}[1/8] Building Docker image...${NC}"
docker build \
    --file docker/php/Dockerfile \
    --tag "${REGISTRY}/${IMAGE_NAME}:${IMAGE_TAG}" \
    --build-arg ENV=production \
    --build-arg COMPOSER_INSTALL_FLAGS="--no-dev --optimize-autoloader --no-interaction" \
    .

if [ $? -ne 0 ]; then
    echo -e "${RED}❌ Docker build failed${NC}"
    exit 1
fi

# Step 2: Push image to registry
echo -e "${GREEN}[2/8] Pushing image to registry...${NC}"
docker push "${REGISTRY}/${IMAGE_NAME}:${IMAGE_TAG}"

if [ $? -ne 0 ]; then
    echo -e "${RED}❌ Docker push failed${NC}"
    exit 1
fi

# Step 3: Prepare deployment files
echo -e "${GREEN}[3/8] Preparing deployment files...${NC}"
rm -rf deployment-production-tmp
mkdir -p deployment-production-tmp

cp docker-compose.base.yml deployment-production-tmp/
cp docker-compose.prod.yml deployment-production-tmp/
cp -r docker deployment-production-tmp/

# Create deployment script
cat > deployment-production-tmp/deploy.sh << 'DEPLOY_SCRIPT'
#!/bin/bash
set -e

echo "=================================================="
echo "Starting Production Deployment on Server"
echo "=================================================="
echo ""

# Database backup (unless explicitly skipped)
if [ "${SKIP_BACKUP}" != "true" ]; then
    echo "[0/6] Creating database backup..."
    BACKUP_FILE="backup_$(date +%Y%m%d_%H%M%S).sql"
    docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml exec -T production-app \
        php console.php db:backup --output="/var/www/html/storage/backups/${BACKUP_FILE}" || {
            echo "⚠️  Database backup failed - deployment aborted"
            exit 1
        }
    echo "✅ Database backup created: ${BACKUP_FILE}"
else
    echo "⚠️  Database backup skipped (not recommended for production)"
fi

# Pull latest images
echo "[1/6] Pulling latest Docker images..."
docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml pull

# Stop existing containers gracefully
echo "[2/6] Stopping existing containers (graceful shutdown)..."
docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml stop

# Start new containers
echo "[3/6] Starting new containers..."
docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml up -d

# Wait for services to be healthy (longer timeout for production)
echo "[4/6] Waiting for services to be healthy..."
sleep 30

# Run database migrations
echo "[5/6] Running database migrations..."
docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml exec -T production-app \
    php console.php db:migrate --force || {
        echo "⚠️  Database migration failed"
        exit 1
    }

# Verify deployment
echo "[6/6] Verifying deployment..."
docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml ps

# Cleanup old containers
echo "Cleaning up old containers..."
docker system prune -f

echo ""
echo "=================================================="
echo "✅ Production Deployment Complete"
echo "=================================================="
DEPLOY_SCRIPT

chmod +x deployment-production-tmp/deploy.sh

# Step 4: Create remote directory and backup
echo -e "${GREEN}[4/8] Creating remote directory and backup...${NC}"
ssh -p "${REMOTE_PORT}" "${REMOTE_USER}@${REMOTE_HOST}" "
    mkdir -p ${REMOTE_PATH}
    cd ${REMOTE_PATH}

    # Backup current deployment
    if [ -d 'current' ]; then
        echo 'Backing up current deployment...'
        timestamp=\$(date +%Y%m%d_%H%M%S)
        mv current backup_\${timestamp}

        # Keep only last 10 backups for production
        ls -dt backup_* 2>/dev/null | tail -n +11 | xargs rm -rf 2>/dev/null || true
        echo 'Backup created: backup_'\${timestamp}
    fi

    # Create new deployment directory
    mkdir -p current
"

if [ $? -ne 0 ]; then
    echo -e "${RED}❌ SSH connection or remote directory creation failed${NC}"
    rm -rf deployment-production-tmp
    exit 1
fi

# Step 5: Copy deployment files to server
echo -e "${GREEN}[5/8] Copying deployment files to server...${NC}"
scp -P "${REMOTE_PORT}" -r deployment-production-tmp/* "${REMOTE_USER}@${REMOTE_HOST}:${REMOTE_PATH}/current/"

if [ $? -ne 0 ]; then
    echo -e "${RED}❌ SCP file transfer failed${NC}"
    rm -rf deployment-production-tmp
    exit 1
fi

# Cleanup local temp directory
rm -rf deployment-production-tmp

# Step 6: Execute deployment on server
echo -e "${GREEN}[6/8] Executing deployment on server...${NC}"
ssh -p "${REMOTE_PORT}" "${REMOTE_USER}@${REMOTE_HOST}" "
    cd ${REMOTE_PATH}/current
    export SKIP_BACKUP=${SKIP_BACKUP}
    ./deploy.sh
"

DEPLOY_EXIT_CODE=$?

if [ $DEPLOY_EXIT_CODE -ne 0 ]; then
    echo -e "${RED}❌ Deployment execution failed${NC}"
    echo -e "${YELLOW}⚠️  Attempting automatic rollback...${NC}"

    ssh -p "${REMOTE_PORT}" "${REMOTE_USER}@${REMOTE_HOST}" "
        cd ${REMOTE_PATH}

        if [ -d \"\$(ls -dt backup_* 2>/dev/null | head -n1)\" ]; then
            echo '🚨 Rolling back to previous deployment...'
            latest_backup=\$(ls -dt backup_* | head -n1)

            # Stop current broken deployment
            cd current
            docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml down 2>/dev/null || true
            cd ..

            # Restore backup
            rm -rf current
            cp -r \"\$latest_backup\" current

            # Start restored deployment
            cd current
            docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml up -d

            # Wait for services
            sleep 30

            # Verify rollback
            docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml ps

            echo '✅ Rollback complete - previous version restored'
        else
            echo '❌ No backup available for rollback'
            echo '⚠️  MANUAL INTERVENTION REQUIRED'
        fi
    "

    exit 1
fi

# Step 7: Health check
echo -e "${GREEN}[7/8] Performing health checks...${NC}"
ssh -p "${REMOTE_PORT}" "${REMOTE_USER}@${REMOTE_HOST}" "
    cd ${REMOTE_PATH}/current

    # Wait for services to be fully ready (longer for production)
    echo 'Waiting 60 seconds for services to initialize...'
    sleep 60

    # Check container status
    echo 'Checking container status...'
    docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml ps

    # Check service health
    echo 'Checking service health...'
    docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml exec -T production-app php -v || echo 'PHP health check skipped'

    # Check PHP-FPM is running
    echo 'Checking PHP-FPM process...'
    docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml exec -T production-app pgrep php-fpm || echo 'PHP-FPM check skipped'

    # Check Redis connection
    echo 'Checking Redis connection...'
    docker-compose -f docker-compose.base.yml -f docker-compose.prod.yml exec -T production-redis redis-cli ping || echo 'Redis check skipped'

    echo ''
    echo '✅ All health checks passed!'
"

if [ $? -ne 0 ]; then
    echo -e "${YELLOW}⚠️  Health check had issues but deployment may still be functional${NC}"
fi

# Step 8: Smoke tests
echo -e "${GREEN}[8/8] Running smoke tests...${NC}"
ssh -p "${REMOTE_PORT}" "${REMOTE_USER}@${REMOTE_HOST}" "
    echo 'Running production smoke tests...'

    # Test main page
    curl -f -k https://michaelschiemer.de/ > /dev/null 2>&1 && echo '✅ Main page accessible' || {
        echo '❌ Main page failed'
        exit 1
    }

    # Test API health
    curl -f -k https://michaelschiemer.de/api/health > /dev/null 2>&1 && echo '✅ API health check passed' || {
        echo '❌ API health check failed'
        exit 1
    }

    echo '✅ Smoke tests completed successfully'
"

if [ $? -ne 0 ]; then
    echo -e "${RED}❌ Smoke tests failed${NC}"
    echo -e "${YELLOW}⚠️  Deployment completed but smoke tests did not pass${NC}"
    exit 1
fi

echo ""
echo "=================================================="
echo -e "${GREEN}✅ Production Deployment Successful${NC}"
echo "=================================================="
echo "URL: https://michaelschiemer.de"
echo "Deployed at: $(date)"
echo ""
echo "Next steps:"
echo "  - Monitor logs: ssh ${REMOTE_USER}@${REMOTE_HOST} 'cd ${REMOTE_PATH}/current && docker-compose logs -f'"
echo "  - Check status: ssh ${REMOTE_USER}@${REMOTE_HOST} 'cd ${REMOTE_PATH}/current && docker-compose ps'"
echo ""