#!/usr/bin/env bash
# 修复 .mjs MIME：nginx 未映射 mjs → 以 application/octet-stream 返回，
# 浏览器拒绝以 module worker 加载（pdf.js 在 /papers/ 页失败回落的根因）
# 用法：sudo bash scripts/ops/fix-mjs-mime.sh   （幂等 + -t 门禁 + 回滚）
set -euo pipefail
MIME=/etc/nginx/mime.types
BAK=/tmp/mime.types.bak-$(date +%s)

echo "==== ① 现状 ===="
grep -nE "\bmjs\b" "$MIME" || echo "（mime.types 里没有 mjs 映射 ← 这就是病根）"
echo -n "线上实测 worker Content-Type: "
curl -sI --noproxy '*' -m 10 "https://wait4x.online/_astro/$(ls /home/wait4x/Code/Github/my-blog/dist/_astro/ | grep -E 'pdf\.worker.*\.mjs' | head -1)" | grep -i "^content-type" | tr -d '\r'

echo
echo "==== ② 计划 ===="
echo "  在 $MIME 的 types 块内插入：application/javascript mjs;"

echo
read -rp ">> 执行？(y/N) " ok; [ "$ok" = "y" ] || { echo "已取消"; exit 0; }

cp "$MIME" "$BAK"
if ! grep -qE "^\s*application/javascript\s+.*\bmjs\b" "$MIME"; then
  # 插到 text/javascript 行尾（同块），保持 types{} 内语法
  if grep -qE "^\s*(application|text)/javascript\s+[^;]*js;" "$MIME"; then
    # 追加到既有 javascript 映射行（nginx mime.types 标准形态：application/javascript js;）
    sed -i -E '0,/^\s*(application|text)\/javascript\s+([^;]*);/s//\1\/javascript                           \2 mjs;/' "$MIME"
    echo "  已在 javascript 映射行追加 mjs"
  else
    sed -i '0,/types {/s//types {\n        application\/javascript                   mjs;/' "$MIME"
    echo "  已在 types 块首插入 mjs"
  fi
fi

echo
echo "==== ③ 门禁 ===="
if ! nginx -t; then echo "!! 语法失败，回滚"; cp "$BAK" "$MIME"; nginx -t && systemctl reload nginx; exit 1; fi
systemctl reload nginx && echo "  nginx 已重载"
echo
echo "==== ④ 终验 ===="
W=$(ls /home/wait4x/Code/Github/my-blog/dist/_astro/ | grep -E 'pdf\.worker.*\.mjs' | head -1)
CT=$(curl -sI --noproxy '*' -m 10 "https://wait4x.online/_astro/$W" | grep -i "^content-type" | tr -d '\r')
echo "  worker $W → $CT（期望含 javascript）"
case "$CT" in *javascript*) echo "  ✅ MIME 已修，刷新 https://wait4x.online/papers/agensh/ 应见 PDF";; *) echo "  ⚠️ 仍不对（ESA 可能缓存了旧头，稍等或 purge）";; esac