#!/bin/bash
# 服务器卡顿定位 — 一次跑完，输出「卡在哪一层」结论
# 用法: bash deploy/profile-server-lag.sh

DJANGO_DIR="/opt/1panel/apps/openresty/nginx/www/sites/43.142.166.152.443/django"
NGINX_LOG="/opt/1panel/apps/openresty/nginx/log/access.log"
PYTHON="${DJANGO_DIR}/venv/bin/python3"
cd "$DJANGO_DIR"

echo "=============================================="
echo "  星阙服务器卡顿定位 — $(date '+%Y-%m-%d %H:%M:%S')"
echo "=============================================="

echo ""
echo ">>> [A] Gunicorn 进程 / 端口"
systemctl is-active gunicorn-dianjing.service 2>/dev/null || echo "systemd: inactive"
GC=$(pgrep -cf 'gunicorn.*a_long_dianjing' 2>/dev/null || echo 0)
echo "gunicorn 进程数: $GC (正常=5: 1master+4worker)"
ss -ltn 2>/dev/null | grep ':8001' || netstat -ltn 2>/dev/null | grep ':8001' || echo "8001 未监听"

echo ""
echo ">>> [A2] 本机直连 Gunicorn（绕过 Nginx）"
for path in "/" "/hqhd/"; do
  T=$(curl -s -o /dev/null -w '%{time_total}' --connect-timeout 3 "http://127.0.0.1:8001${path}" 2>/dev/null || echo "FAIL")
  echo "  127.0.0.1:8001${path} -> ${T}s"
done

echo ""
echo ">>> [B] MySQL 延迟（Django 连接池）"
"$PYTHON" manage.py shell -c "
import time
from django.db import connection
import app_secrets
print(f'  当前配置: {app_secrets.DATABASE_HOST}:{app_secrets.DATABASE_PORT} / {app_secrets.DATABASE_NAME}')
for label, sql in [('连接+查询', 'SELECT 1'), ('订单count', 'SELECT COUNT(*) FROM orders_order WHERE Status IN (1,7)')]:
    t0 = time.perf_counter()
    with connection.cursor() as c:
        c.execute(sql)
        c.fetchone()
    ms = (time.perf_counter() - t0) * 1000
    print(f'  [{label}] {ms:.0f}ms')
" 2>/dev/null || echo "  B段失败，请确认 venv 可用"

echo ""
echo ">>> [C] 订单列表 ORM（近似 dddhq 核心查询）"
"$PYTHON" manage.py shell -c "
import time
from django.db import connection, reset_queries
from django.conf import settings
from django.db.models import Q
from orders.models import Order
settings.DEBUG = True
reset_queries()
t0 = time.perf_counter()
qs = Order.query.filter(Q(Status__in=[1, 7])).order_by('-CreateTime')
total = qs.count()
page = list(qs[:5].values('OrderID', 'Status', 'CreateTime'))
elapsed = (time.perf_counter() - t0) * 1000
n = len(connection.queries)
sql_ms = sum(float(q.get('time', 0)) for q in connection.queries) * 1000
print(f'  SQL条数={n}  SQL耗时={sql_ms:.0f}ms  总耗时={elapsed:.0f}ms  订单总数={total}')
" 2>/dev/null || echo "  C段失败"

echo ""
echo ">>> [D] Nginx 真实接口 rt=（这是最终体感，最重要）"
if [ -f "$NGINX_LOG" ]; then
  echo "  最近20条 hqhd:"
  grep -a 'hqhd' "$NGINX_LOG" | tail -20 | while read -r line; do
    RT=$(echo "$line" | grep -oP 'rt=\K[0-9.]+' || echo "?")
    URI=$(echo "$line" | grep -oP '"(GET|POST) \K[^ ]+' || echo "?")
    echo "    rt=${RT}s  $URI"
  done
  echo ""
  STATS=$(grep -a 'hqhd' "$NGINX_LOG" | tail -500 | grep -oP 'rt=\K[0-9.]+' | sort -n | awk '
    { a[NR]=$1; sum+=$1 }
    END {
      if(NR==0){ print "NONE"; exit }
      mid=(NR%2)?a[(NR+1)/2]:(a[NR/2]+a[NR/2+1])/2
      printf "%d %.3f %.3f %.3f", NR, mid, sum/NR, a[NR]
    }')
  if [ "$STATS" != "NONE" ]; then
    N=$(echo "$STATS" | awk '{print $1}')
    MID=$(echo "$STATS" | awk '{print $2}')
    AVG=$(echo "$STATS" | awk '{print $3}')
    MAX=$(echo "$STATS" | awk '{print $4}')
    echo "  最近500条: 样本=$N  中位rt=${MID}s  平均rt=${AVG}s  最大rt=${MAX}s"
    echo ""
    if awk -v m="$MID" 'BEGIN{exit(m>0.15)}'; then
      echo "  >>> 结论D: API 偏慢（中位>150ms），查数据库/B/C段"
    elif awk -v m="$MID" 'BEGIN{exit(m>0.08)}'; then
      echo "  >>> 结论D: API 略慢但可接受（80~150ms）"
    else
      echo "  >>> 结论D: 服务器 API 正常（中位<80ms），和2月一样快"
      echo "      若小程序还卡，不是后端接口慢，查：手机网络/图片加载/页面连发多个接口"
    fi
  fi
  echo ""
  echo "  最近慢请求 rt>500ms:"
  grep -a 'hqhd' "$NGINX_LOG" | grep -E 'rt=0\.[5-9]|rt=[1-9]' | tail -10 | while read -r line; do
    RT=$(echo "$line" | grep -oP 'rt=\K[0-9.]+' || echo "?")
    URI=$(echo "$line" | grep -oP '"(GET|POST) \K[^ ]+' || echo "?")
    echo "    rt=${RT}s  $URI"
  done
else
  echo "  找不到 $NGINX_LOG"
fi

echo ""
echo ">>> [E] 系统资源"
echo "  load: $(cat /proc/loadavg 2>/dev/null || uptime)"
free -h 2>/dev/null | head -2 || true
journalctl --disk-usage 2>/dev/null | head -1 || true

echo ""
echo ">>> [F] 请求最多的 IP+接口"
if [ -f "$NGINX_LOG" ]; then
  tail -3000 "$NGINX_LOG" | grep -a 'hqhd' | awk '{
    for(i=1;i<=NF;i++) if($i ~ /^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$/) ip=$i
    if(match($0, /"(GET|POST) ([^ ]+)/, m)) uri=m[2]
    if(ip && uri) c[ip" "uri]++
  } END {
    n=0
    for(k in c) arr[n++]=c[k]" "k
    asort(arr)
    for(i=n;i>0 && i>n-10;i--) print "  "arr[i]
  }' 2>/dev/null || true
fi

echo ""
echo "=============================================="