#!/bin/bash
# TinyBox VPS System Monitor
# Save as: /usr/local/bin/tinybox-monitor.sh

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

echo -e "${BLUE}🖥️  TinyBox VPS System Monitor${NC}"
echo "========================================"
date
echo

# System info
echo -e "${BLUE}📊 System Information:${NC}"
echo "Hostname: $(hostname)"
echo "Uptime: $(uptime -p)"
echo "Kernel: $(uname -r)"
echo

# CPU and Load
echo -e "${BLUE}🔥 CPU & Load Average:${NC}"
LOAD1=$(uptime | awk '{print $10}' | sed 's/,//')
LOAD5=$(uptime | awk '{print $11}' | sed 's/,//')
LOAD15=$(uptime | awk '{print $12}')

echo "Load Average: $LOAD1 (1min) $LOAD5 (5min) $LOAD15 (15min)"

# CPU cores
CORES=$(nproc)
echo "CPU Cores: $CORES"

# Load analysis
if (( $(echo "$LOAD1 > $CORES" | bc -l) 2>/dev/null )); then
    echo -e "${RED}⚠️  High CPU load detected!${NC}"
elif (( $(echo "$LOAD1 > $(echo "$CORES * 0.7" | bc)" | bc -l) 2>/dev/null )); then
    echo -e "${YELLOW}⚡ Moderate CPU load${NC}"
else
    echo -e "${GREEN}✅ CPU load normal${NC}"
fi
echo

# Memory Usage
echo -e "${BLUE}💾 Memory Usage:${NC}"
free -h
echo

MEM_PERCENT=$(free | grep Mem | awk '{printf("%.0f", $3/$2 * 100.0)}')
echo "Memory Usage: ${MEM_PERCENT}%"

if [ $MEM_PERCENT -gt 90 ]; then
    echo -e "${RED}⚠️  Critical memory usage!${NC}"
elif [ $MEM_PERCENT -gt 80 ]; then
    echo -e "${YELLOW}⚡ High memory usage${NC}"
else
    echo -e "${GREEN}✅ Memory usage normal${NC}"
fi
echo

# Disk Usage
echo -e "${BLUE}💿 Disk Usage:${NC}"
df -h /
echo

DISK_PERCENT=$(df / | tail -1 | awk '{print $5}' | sed 's/%//')
echo "Disk Usage: ${DISK_PERCENT}%"

if [ $DISK_PERCENT -gt 90 ]; then
    echo -e "${RED}⚠️  Critical disk usage!${NC}"
elif [ $DISK_PERCENT -gt 80 ]; then
    echo -e "${YELLOW}⚡ High disk usage${NC}"
else
    echo -e "${GREEN}✅ Disk usage normal${NC}"
fi
echo

# Top processes by CPU
echo -e "${BLUE}🔥 Top 5 CPU Consumers:${NC}"
ps aux --sort=-%cpu | head -6
echo

# Top processes by Memory
echo -e "${BLUE}🧠 Top 5 Memory Consumers:${NC}"
ps aux --sort=-%mem | head -6
echo

# Network connections
echo -e "${BLUE}🌐 Active Network Connections:${NC}"
CONNECTIONS=$(ss -tuln | wc -l)
echo "Total connections: $CONNECTIONS"

# Service status
echo
echo -e "${BLUE}🔧 Key Services Status:${NC}"
for service in ssh nginx apache2 mysql postgresql; do
    if systemctl is-active --quiet $service 2>/dev/null; then
        echo -e "${GREEN}✅ $service is running${NC}"
    elif systemctl list-unit-files | grep -q "^$service.service"; then
        echo -e "${RED}❌ $service is stopped${NC}"
    fi
done

echo
echo "===========================================" 
echo "Monitor completed at $(date)"

# Make executable: chmod +x /usr/local/bin/tinybox-monitor.sh