#!/bin/bash
# ==============================================================================
# Sechpoint Wallarm Smart Deployer - Multi-Distro PoC Optimized
# ==============================================================================

# --- Styling ---
YELLOW='\033[1;33m'
GREEN='\033[0;32m'
RED='\033[0;31m'
NC='\033[0m'

LOG_FILE="/var/log/wallarm-deploy.log"
EU_DATA_NODES=("api.wallarm.com" "node-data0.eu1.wallarm.com" "node-data1.eu1.wallarm.com")
US_DATA_NODES=("us1.api.wallarm.com" "node-data0.us1.wallarm.com" "node-data1.us1.wallarm.com")

# --- Initialization ---
sudo touch "$LOG_FILE" && sudo chmod 644 "$LOG_FILE"
exec > >(tee -a "$LOG_FILE") 2>&1 

clear
echo -e "${YELLOW}====================================================${NC}"
echo -e "${YELLOW}      Wallarm Automated Container Deployer          ${NC}"
echo -e "${YELLOW}====================================================${NC}"

# --- 1. DETECTION & PRE-FLIGHT ---

detect_environment() {
    echo -e "\n${YELLOW}[1/5] Detecting System Environment...${NC}"
    if command -v dnf &> /dev/null; then
        PKG_MANAGER="dnf"
        ENGINE="podman"
        echo -e "${GREEN}[PASS]${NC} Detected modern RHEL/CentOS (using dnf/podman)"
    elif command -v yum &> /dev/null; then
        PKG_MANAGER="yum"
        ENGINE="podman"
        echo -e "${GREEN}[PASS]${NC} Detected older RHEL/CentOS (using yum/podman)"
    elif command -v apt-get &> /dev/null; then
        PKG_MANAGER="apt"
        ENGINE="docker"
        echo -e "${GREEN}[PASS]${NC} Detected Debian/Ubuntu (using apt/docker)"
    else
        echo -e "${RED}[FAIL]${NC} No supported package manager found (dnf/yum/apt)."; exit 1
    fi
}

check_sudo() {
    if sudo -v; then
        echo -e "${GREEN}[PASS]${NC} Sudo access confirmed."
    else
        echo -e "${RED}[FAIL]${NC} Sudo access denied."; exit 1
    fi
}

check_wallarm_cloud() {
    echo -e "\n${YELLOW}[2/5] Testing Wallarm Cloud Connectivity (Port 443)...${NC}"
    read -p "Wallarm Cloud (US/EU) [US]: " CLOUD_SEL
    CLOUD_SEL=${CLOUD_SEL^^}
    CLOUD_SEL=${CLOUD_SEL:-US}
    
    local nodes_to_test=("${US_DATA_NODES[@]}")
    if [[ "$CLOUD_SEL" == "EU" ]]; then
        nodes_to_test=("${EU_DATA_NODES[@]}")
    fi

    for node in "${nodes_to_test[@]}"; do
        if ! curl -skI --connect-timeout 5 "https://$node" > /dev/null 2>&1; then
            echo -e "${RED}[FAIL]${NC} Cannot reach $node"
            return 1
        fi
        echo -e "${GREEN}[PASS]${NC} Reached $node"
    done
    
    API_HOST=$([[ "$CLOUD_SEL" == "EU" ]] && echo "api.wallarm.com" || echo "us1.api.wallarm.com")
}

# --- 2. INPUT & CONFIGURATION ---

get_user_input() {
    echo -e "\n${YELLOW}[3/5] Configuration & Workspace Setup...${NC}"
    
    [ -d /opt/wallarm ] && ls -F /opt/wallarm/ | grep '/' | sed 's/\///' || echo "No existing instances."

    read -p "Enter Instance Number (e.g., 1, 2, 3): " INSTANCE_NUM
    if ! [[ "$INSTANCE_NUM" =~ ^[0-9]+$ ]]; then echo -e "${RED}ERROR: Invalid number.${NC}"; exit 1; fi

    NODE_NAME="wallarm-node-$INSTANCE_NUM"
    INSTANCE_DIR="/opt/wallarm/$INSTANCE_NUM"
    TRAFFIC_PORT=$((8000 + INSTANCE_NUM))
    MONITOR_PORT=$((9000 + INSTANCE_NUM))

    read -p "Enter Upstream IP (App Server) [127.0.0.1]: " UPSTREAM_IP
    UPSTREAM_IP=${UPSTREAM_IP:-127.0.0.1}
    read -p "Enter Upstream Port [80]: " UPSTREAM_PORT
    UPSTREAM_PORT=${UPSTREAM_PORT:-80}
    read -p "Paste Wallarm Token: " TOKEN
    
    echo -n "Verifying App Server ($UPSTREAM_IP:$UPSTREAM_PORT)... "
    if ! timeout 2 bash -c "cat < /dev/null > /dev/tcp/$UPSTREAM_IP/$UPSTREAM_PORT" 2>/dev/null; then
        echo -e "${RED}FAILED${NC}"; exit 1
    fi
    echo -e "${GREEN}OK${NC}"
}

# --- 3. ENGINE SETUP ---

setup_engine() {
    echo -e "\n${YELLOW}[4/5] 🛠️ Ensuring Engine ($ENGINE) is ready...${NC}"
    case "$PKG_MANAGER" in
        dnf|yum)
            sudo $PKG_MANAGER install -y epel-release wget curl &>/dev/null
            sudo $PKG_MANAGER install -y podman podman-docker podman-compose &>/dev/null
            sudo systemctl enable --now podman.socket &>/dev/null
            if systemctl is-active --quiet firewalld; then
                sudo firewall-cmd --permanent --add-port=$TRAFFIC_PORT/tcp --add-port=$MONITOR_PORT/tcp &>/dev/null
                sudo firewall-cmd --reload &>/dev/null
            fi
            ;;
        apt)
            sudo apt-get update &>/dev/null
            sudo apt-get install -y docker.io docker-compose wget curl &>/dev/null
            sudo systemctl enable --now docker &>/dev/null
            ;;
    esac
}

# --- 4. DEPLOYMENT ---

execute_deployment() {
    echo -e "\n${YELLOW}[5/5] 🚀 Preparing Workspace: $INSTANCE_DIR${NC}"
    sudo mkdir -p "$INSTANCE_DIR"
    cd "$INSTANCE_DIR"

    IMAGE_NAME="docker.io/wallarm/node:latest"

    sudo tee "$INSTANCE_DIR/nginx.conf" > /dev/null <<EOF
server {
    listen 80;
    wallarm_mode monitoring;
    location / {
        proxy_pass http://$UPSTREAM_IP:$UPSTREAM_PORT;
        proxy_set_header Host \$host;
        proxy_set_header X-Real-IP \$remote_addr;
        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
    }
}
server { 
    listen 90; 
    location /wallarm-status { 
        wallarm_status on; 
        allow all; 
    } 
}
EOF

    sudo tee "$INSTANCE_DIR/compose.yml" > /dev/null <<EOF
version: '3.8'
services:
  node:
    image: $IMAGE_NAME
    container_name: $NODE_NAME
    restart: always
    ports: 
      - "$TRAFFIC_PORT:80"
      - "$MONITOR_PORT:90"
    environment:
      - WALLARM_API_TOKEN=$TOKEN
      - WALLARM_API_HOST=$API_HOST
    volumes: 
      - ./nginx.conf:/etc/nginx/http.d/default.conf:ro,Z
EOF

    echo "Launching Instance..."
    sudo $ENGINE rm -f "$NODE_NAME" &>/dev/null
    sudo $ENGINE pull $IMAGE_NAME

    if command -v podman-compose &> /dev/null; then
        sudo podman-compose up -d
    else
        sudo docker-compose up -d
    fi
}

# --- 5. VERIFICATION ---

verify_health() {
    echo -e "\n${YELLOW}⏳ Handshake...${NC}"
    sleep 20
    echo -en "Checking Monitor Port $MONITOR_PORT... "
    if curl -s "http://localhost:$MONITOR_PORT/wallarm-status" | grep -q "requests"; then
        echo -e "${GREEN}SUCCESS${NC}"
        echo -e "\n${GREEN}✅ DEPLOYMENT COMPLETE${NC}"
        echo -e "Traffic: http://localhost:$TRAFFIC_PORT"
    else
        echo -e "${RED}WARNING: Status page not responding yet.${NC}"
    fi
}

# --- EXECUTION ---
detect_environment
check_sudo
check_wallarm_cloud || exit 1
get_user_input
setup_engine
execute_deployment
verify_health