#!/bin/bash
# ============================================================================
# bench-cdn.sh — UIkit CDN 测速脚本（国内 / 海外双视角）
#
# 用途：对比"自建 R2 自托管 uikit"与"公共 CDN (cdnjs.snrat.com)"的加载速度，
#       用于验证/复测 2026-09-05 的 CDN 迁移是否持续生效。
#
# 用法：
#   bash dev/bench-cdn.sh cn      # 国内本机：每资源 5 次全量下载取中位
#   bash dev/bench-cdn.sh global  # 海外：check-host.net 多区域节点 (p50/p90)
#
# 数据结论参考（2026-09-05 基线，国内中位）：
#   css    R2 0.864s  -> snrat 0.200s   (4.3x)
#   js     R2 0.796s  -> snrat 0.163s   (4.9x)
#   icons  R2 0.824s  -> snrat 0.177s   (4.7x)
#   海外（check-host p50）：css 打平；js R2 372ms vs snrat 647ms (R2 略快)
# 结论：站点访客以国内为主 -> snrat 净收益大；海外属轻微下降可接受。
# ============================================================================

OLD_CSS="https://r2.337845818.best/tamabox/cdn/expire-1-y/uikit/3.3.3/css/modify-black-font/uikit.min.css"
NEW_CSS="https://cdnjs.snrat.com/ajax/libs/uikit/3.3.3/css/uikit.min.css"
OLD_JS="https://r2.337845818.best/tamabox/cdn/lib/uikit/3.3.3/js/uikit.min.js"
NEW_JS="https://cdnjs.snrat.com/ajax/libs/uikit/3.3.3/js/uikit.min.js"
OLD_ICONS="https://r2.337845818.best/tamabox/cdn/lib/uikit/3.3.3/js/uikit-icons.min.js"
NEW_ICONS="https://cdnjs.snrat.com/ajax/libs/uikit/3.3.3/js/uikit-icons.min.js"

# ---------- 国内：全量下载计时 ----------
bench_cn() {
  echo "== 国内本机：每资源 5 次全量下载（秒），取中位 =="
  local pairs=(
    "OLD-css   (R2 modify):$OLD_CSS"
    "NEW-css   (snrat)     :$NEW_CSS"
    "OLD-js    (R2)        :$OLD_JS"
    "NEW-js    (snrat)     :$NEW_JS"
    "OLD-icons (R2)        :$OLD_ICONS"
    "NEW-icons (snrat)     :$NEW_ICONS"
  )
  for entry in "${pairs[@]}"; do
    local name="${entry%%:*}"; local url="${entry#*:}"
    local vals=()
    for i in 1 2 3 4 5; do
      vals+=("$(curl -sS -o /dev/null -w '%{time_total}' --max-time 20 "$url" 2>/dev/null)")
    done
    local sorted=($(printf '%s\n' "${vals[@]}" | sort -n))
    local med="${sorted[2]}"
    printf '%-20s : [%s] 中位=%ss\n' "$name" "${vals[*]}" "$med"
  done
}

# ---------- 海外：check-host.net 多区域节点 ----------
probe_global() {
  local name="$1" url="$2"
  local enc
  enc=$(python3 -c "import urllib.parse,sys;print(urllib.parse.quote(sys.argv[1],safe=''))" "$url")
  local rid
  rid=$(curl -sS -H "Accept: application/json" \
        "https://check-host.net/check-http?host=$enc&max_nodes=12" 2>/dev/null \
        | python3 -c "import sys,json;print(json.load(sys.stdin).get('request_id',''))")
  [ -z "$rid" ] && { echo "$name: 请求失败"; return; }
  sleep 8
  curl -sS -H "Accept: application/json" "https://check-host.net/check-result/$rid" 2>/dev/null \
  | python3 -c "
import sys,json,statistics
d=json.load(sys.stdin)
ms=[]
for node,arr in (d or {}).items():
    if not arr or not arr[0]: continue
    r=arr[0]
    if len(r)>3 and str(r[3]).startswith('2') and isinstance(r[1],(int,float)):
        ms.append(r[1]*1000)
if ms:
    ms.sort()
    print(f'$name | n={len(ms)} | min={ms[0]:.0f} | p50={statistics.median(ms):.0f} | p90={ms[int(len(ms)*0.9)-1]:.0f} | max={ms[-1]:.0f} ms')
else:
    print(f'$name | 无有效节点')
"
}

bench_global() {
  echo "== 海外：check-host.net 多区域节点探测（HTTP 200 的耗时统计）=="
  probe_global "OLD css (R2 modify)"  "$OLD_CSS"
  probe_global "NEW css (snrat)"      "$NEW_CSS"
  probe_global "OLD js  (R2)"         "$OLD_JS"
  probe_global "NEW js  (snrat)"      "$NEW_JS"
}

case "$1" in
  cn)     bench_cn ;;
  global) bench_global ;;
  *)
    echo "用法: bash dev/bench-cdn.sh {cn|global}"
    echo "  cn     = 国内本机全量下载测速"
    echo "  global = 海外 check-host.net 多区域探测"
    exit 1
    ;;
esac