#!/usr/bin/env bash
# ============================================================================
# MAX DiskReport — 磁盘深度使用报告
# 原创脚本，整合 df / du / iostat / find 功能于一体
#
# 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-diskreport.sh)
#       bash <(curl -fsSL https://dl.unvmax.com/linux/scripts/max-tools/max-diskreport.sh) /var/log
# ============================================================================

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}  ${G}MAX 磁盘深度报告${N}  ${GR}(只读诊断)${N}"
echo -e "${B}└─────────────────────────────────────────────┘${N}"
echo

TARGET="${1:-/}"

echo -e "  ${M}1. 分区使用率一览${N}"
echo -e "  ${GR}───${N}"
df -hT 2>/dev/null | grep '^/' | sort -rn -k6 | while read -r line; do
    pct=$(echo "$line" | awk '{print $6}' | tr -d '%')
    fs=$(echo "$line" | awk '{print $1}')
    fstype=$(echo "$line" | awk '{print $2}')
    size=$(echo "$line" | awk '{print $3}')
    used=$(echo "$line" | awk '{print $4}')
    mount=$(echo "$line" | awk '{print $7}')
    [ "$pct" -gt 85 ] && c=$R
    [ "$pct" -gt 70 ] && [ "$pct" -le 85 ] && c=$Y
    [ "$pct" -le 70 ] && c=$G
    echo -e "  ${c}${used}/${size} ($pct%)${N}  ${GR}$fstype $fs → $mount${N}"
done

echo -e "\n  ${M}2. Inode 使用率${N}"
echo -e "  ${GR}───${N}"
df -i 2>/dev/null | grep '^/' | head -5 | while read -r line; do
    ipct=$(echo "$line" | awk '{print $5}' | tr -d '%')
    mount=$(echo "$line" | awk '{print $6}')
    [ "$ipct" -gt 80 ] && c=$R
    [ "$ipct" -gt 60 ] && [ "$ipct" -le 80 ] && c=$Y
    [ "$ipct" -le 60 ] && c=$G
    echo -e "  ${c}Inode: $ipct%${N}  ${GR}$mount${N}"
done

echo -e "\n  ${M}3. 大目录 TOP10 (${TARGET})${N}"
echo -e "  ${GR}───${N}"
if command -v du &>/dev/null; then
    du -hx --max-depth=3 "$TARGET" 2>/dev/null | sort -rh | head -10 | while read -r line; do
        echo -e "  ${GR}$line${N}"
    done
else
    echo -e "  ${Y}du 命令不可用${N}"
fi

echo -e "\n  ${M}4. 磁盘 IO 状态${N}"
echo -e "  ${GR}───${N}"
if command -v iostat &>/dev/null; then
    iostat -x 1 2 2>/dev/null | tail -20 | head -15
else
    echo -e "  ${Y}(iostat 未安装，使用 /proc/diskstats 摘要)${N}"
    awk '/[a-z]d[a-z]/ {
        dev = $3; r_sec = $6; w_sec = $10
        r_time = $7; w_time = $11
        printf "  %-8s 读扇区:%-12s 写扇区:%-12s IO时间:%-6s\n", dev, r_sec, w_sec, r_time + w_time
    }' /proc/diskstats 2>/dev/null | head -10
fi

echo -e "\n  ${M}5. 超大文件 TOP10 (≥100MB)${N}"
echo -e "  ${GR}───${N}"
found=$(find "$TARGET" -xdev -type f -size +100M 2>/dev/null | head -1)
if [ -n "$found" ]; then
    find "$TARGET" -xdev -type f -size +100M 2>/dev/null -exec ls -lh {} \; 2>/dev/null | \
        awk '{print $5, $NF}' | sort -rh | head -10 | while read -r line; do
        echo -e "  ${Y}$line${N}"
    done
else
    echo -e "  ${GR}($TARGET 下无超过 100MB 的文件)${N}"
fi

echo
echo -e "${GR}👉 配合使用: max-sysinfo.sh (系统概览) | max-bench.sh (性能测试)${N}"