#!/bin/bash
# 回滚脚本（launch.sh 的逆操作）：静态 root 切回 Halo proxy_pass(18090)。秒级。
set -eu
DRY=1
[ "${1:-}" = "--exec" ] && DRY=0
NGINX_DEFAULT=/etc/nginx/sites-available/default

echo "== 回滚计划：location / 静态 root → proxy_pass http://127.0.0.1:18090 =="
if [ $DRY = 1 ]; then echo "== DRY-RUN（--exec + root 才执行） =="; exit 0; fi
if [ "$(id -u)" != 0 ]; then echo "须 root：sudo bash $0 --exec" >&2; exit 1; fi
grep -q "docker_apps/blog/www-staging" "$NGINX_DEFAULT" || { echo "未找到静态 root，无需回滚或已回滚"; exit 0; }
python3 - "$NGINX_DEFAULT" <<'PY'
import re, sys
path = sys.argv[1]
s = open(path, encoding="utf-8").read()
s2 = re.sub(
    r"location / \{\n        root /home/wait4x/docker_apps/blog/www-staging;\n        try_files \$uri \$uri/index\.html =404;\n    \}",
    """location / {
        proxy_pass http://127.0.0.1:18090;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }""",
    s, count=1)
assert s2 != s, "静态块未匹配，人工核对"
open(path, "w", encoding="utf-8").write(s2)
print("reverted: location / -> halo 18090")
PY
nginx -t && systemctl reload nginx && echo "ROLLED BACK：wait4x.online 已回 Halo"