#!/bin/bash

# --- CONFIGURATION ---
# Add the exact service names you want to monitor here
SERVICES=("nginx" "apache2" "httpd" "mysql" "mariadb" "docker" "sshd" "salt-minion" "postfix" "sendmail" "veeamservice" "publicweb")

# --- COLORS ---
GREEN='\033[1;32m'
BLUE='\033[1;34m'
RED='\033[1;31m'
NC='\033[0m'

clear
echo -e "${BLUE}===================================================${NC}"
echo -e "${GREEN}   SYSTEM INFORMATION: $(hostname)${NC}"
echo -e "${BLUE}===================================================${NC}"

# 1. OS & Kernel Info (NEW)
# Tries to grab the "Pretty Name" (e.g., Ubuntu 20.04 LTS) from os-release
if [ -f /etc/os-release ]; then
    . /etc/os-release
    os_name=$PRETTY_NAME
else
    # Fallback for very old systems
    os_name=$(uname -s)
fi
kernel_version=$(uname -r)

echo -e "OS:       $os_name"
echo -e "KERNEL:   $kernel_version"
echo -e "UPTIME:   $(uptime -p)"
echo -e "LOAD AVG: $(cat /proc/loadavg | awk '{print $1, $2, $3}')"
echo ""

# 2. Memory Usage
mem_total=$(free -m | awk '/Mem:/ { print $2 }')
mem_used=$(free -m | awk '/Mem:/ { print $3 }')
mem_percent=$(awk "BEGIN {printf \"%.2f\",(${mem_used}/${mem_total})*100}")
echo -e "MEMORY:   ${mem_used}MB / ${mem_total}MB (${mem_percent}%)"

# 3. Disk Usage
disk_usage=$(df -h / | awk '/dev/')
echo -e "DISK (/): $disk_usage"
echo ""

# 4. Service Status
echo -e "${BLUE}--- SERVICE STATUS ---${NC}"
for service in "${SERVICES[@]}"; do
    if systemctl list-unit-files --state=enabled,disabled,generated | grep -Fq "$service.service"; then
        if systemctl is-active --quiet "$service"; then
            echo -e "  $service: ${GREEN}● ACTIVE${NC}"
        else
            echo -e "  $service: ${RED}● DOWN/INACTIVE${NC}"
        fi
    elif systemctl is-active --quiet "$service"; then
             echo -e "  $service: ${GREEN}● ACTIVE${NC}"
    fi
done

# 5. Network & User Info
ip_addr=$(hostname -I | cut -d' ' -f1)
echo ""
echo -e "IP ADDR:  $ip_addr"
echo -e "USER:     $USER"
echo -e "${BLUE}===================================================${NC}"
echo ""