#!/usr/bin/env bash
# ============================================================================
# MAX LoadCheck — 服务器负载深度分析
# 原创脚本，综合 top/ps/vmstat 信息分析系统压力来源
#
# 风险等级: 🟢 只读 — 不修改任何系统设置
# 用法: bash <(curl -fsSL https://dl.unvmax.com/linux/scripts/max-tools/max-loadcheck.sh)
# ============================================================================

set -e

R='\033[1;31m' G='\033[1;32m' Y='\033[1;33m' B='\033[1;34m'
C='\033[1;36m' M='\033[1;35m' W='\033[1;37m' N='\033[0m'
GR='\033[90m'

echo -e "${B}┌─────────────────────────────────────────────┐${N}"
echo -e "${B}│${N}  ${G}MAX 负载深度分析${N}  ${GR}(只读诊断)${N}"
echo -e "${B}└─────────────────────────────────────────────┘${N}"
echo

# 1. CPU 负载
cpu_cores=$(grep -c '^processor' /proc/cpuinfo 2>/dev/null || nproc 2>/dev/null || echo 1)
load=$(awk '{print $1, $2, $3}' /proc/loadavg 2>/dev/null)
load1=$(echo "$load" | awk '{print $1}' | cut -d. -f1)
load5=$(echo "$load" | awk '{print $2}' | cut -d. -f1)
load15=$(echo "$load" | awk '{print $3}' | cut -d. -f1)

echo -e "  ${M}1. CPU 负载概览${N}"
echo -e "  ${GR}───${N}"
echo -e "  CPU 核心数: ${W}$cpu_cores${N}"
[ "$load1" -gt "$cpu_cores" ] && c1=$R || c1=$G
[ "$load5" -gt "$cpu_cores" ] && c5=$R || c5=$G
[ "$load15" -gt "$cpu_cores" ] && c15=$R || c15=$G
echo -e "  负载: ${c1}1min: $load1${N} / ${c5}5min: $load5${N} / ${c15}15min: $load15${N}"
echo -e "  ${GR}  (超过核心数 = 过载)${N}"

# 2. CPU 占用 TOP10
echo -e "\n  ${M}2. CPU 消耗 TOP10${N}"
echo -e "  ${GR}───${N}"
ps aux --sort=-%cpu 2>/dev/null | head -11 | awk 'NR==1{printf "  %-6s %-5s %-24s %s\n","PID","%CPU","COMMAND","USER"}' 
ps aux --sort=-%cpu 2>/dev/null | head -11 | awk 'NR>1{printf "  %-6s %-5s %-24s %s\n",$2,$3,$11,$1}'

# 3. 内存占用 TOP10
echo -e "\n  ${M}3. 内存占用 TOP10${N}"
echo -e "  ${GR}───${N}"
ps aux --sort=-%mem 2>/dev/null | head -11 | awk 'NR>1{printf "  %-6s %-5s %-24s %s\n",$2,$4,$11,$1}'

# 4. 僵尸进程检查
echo -e "\n  ${M}4. 僵尸 / D 状态进程${N}"
echo -e "  ${GR}───${N}"
zombie=$(ps aux 2>/dev/null | awk '$8=="Z" || $8=="Z+"' | wc -l)
dsleep=$(ps aux 2>/dev/null | awk '$8=="D" || $8=="D+"' | wc -l)
[ "$zombie" -gt 0 ] && zc=$R || zc=$G
[ "$dsleep" -gt 0 ] && dc=$Y || dc=$G
echo -e "  僵尸进程(Z): ${zc}$zombie${N}"
echo -e "  不可中断(D): ${dc}$dsleep${N}"

# 5. SWAP 压力
echo -e "\n  ${M}5. Swap 压力${N}"
echo -e "  ${GR}───${N}"
si=$(awk '/^pswpin/{print $2}' /proc/vmstat 2>/dev/null || echo 0)
so=$(awk '/^pswpout/{print $2}' /proc/vmstat 2>/dev/null || echo 0)
[ "$si" -gt 0 ] || [ "$so" -gt 0 ] && sc=$Y || sc=$G
echo -e "  Swap In: ${sc}$si${N}  |  Swap Out: ${sc}$so${N}"
echo -e "  ${GR}(数值 > 0 表示内存可能不足)${N}"

# 6. 最大进程数的进程
echo -e "\n  ${M}6. 进程数最多的服务${N}"
echo -e "  ${GR}───${N}"
ps -eo comm= 2>/dev/null | sort | uniq -c | sort -rn | head -10 | while read -r cnt name; do
    [ "$cnt" -gt 50 ] && c=$R || c=$GR
    echo -e "  ${c}$cnt${N}  $name"
done

echo
echo -e "${GR}👉 性能基准: max-bench.sh | 磁盘分析: max-diskreport.sh${N}"