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#!/bin/bash
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echo "========================================"
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echo "Welcome to FengLing Server"
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echo "----------------------------------------"
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SYSTEM_INFO=$(lsb_release -d 2>/dev/null | awk -F"\t" '{print $2}')
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[ -z "$SYSTEM_INFO" ] && SYSTEM_INFO="$(uname -s) $(uname -r)"
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printf " System   : %s\n" "$SYSTEM_INFO"
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printf " Hostname : %s\n" "$(hostname)"
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printf " Uptime   : %s\n" "$(uptime -p)"
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printf " Load     : %s\n" "$(awk '{print $1,$2,$3}' /proc/loadavg)"
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CPU_USAGE=$(awk -v FS=" " '
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/^cpu / {
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  idle=$5; total=0;
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  for (i=2; i<=NF; i++) total+=$i;
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}
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END {
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  printf "%.1f%%", 100*(1 - idle/total)
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}' /proc/stat)
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CPU_CORES=$(nproc)
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printf " CPU      : %s (%s cores)\n" "$CPU_USAGE" "$CPU_CORES"
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MEM_TOTAL=$(free -m | awk '/Mem:/ {print $2}')
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MEM_USED=$(free -m | awk '/Mem:/ {print $3}')
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MEM_PERCENT=$(awk -v used="$MEM_USED" -v total="$MEM_TOTAL" 'BEGIN {printf "%.0f%%", used/total*100}')
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printf " Memory   : %sMB / %sMB (%s)\n" "$MEM_USED" "$MEM_TOTAL" "$MEM_PERCENT"
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DISK_USED=$(df -h / | awk 'NR==2 {print $3}')
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DISK_TOTAL=$(df -h / | awk 'NR==2 {print $2}')
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DISK_PERCENT=$(df -h / | awk 'NR==2 {print $5}')
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printf " Disk     : %s / %s (%s)\n" "$DISK_USED" "$DISK_TOTAL" "$DISK_PERCENT"
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if command -v docker >/dev/null 2>&1; then
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    if systemctl is-active --quiet docker; then
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        CONTAINER_COUNT=$(docker ps -q 2>/dev/null | wc -l)
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        printf " Docker   : Running (%s containers)\n" "$CONTAINER_COUNT"
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    else
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        printf " Docker   : Installed but Stopped\n"
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    fi
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else
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    printf " Docker   : Not Installed\n"
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fi
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echo "========================================"