# 粗粒度限流区（按客户端 IP）：仅作未鉴权公开接口的最外层泄洪，阈值远高于正常使用，
# 真正的多维限流在后端 Go 中间件。本文件以 conf.d 形式 include 进 http{} 上下文，
# 故 limit_req_zone 放在 server{} 之外。10m 约可容纳 16 万个 IP 的状态。
limit_req_zone $binary_remote_addr zone=jiu_pub:10m rate=10r/s;
limit_req_status 429;

server {
    listen 127.0.0.1:8445 ssl;
    server_name jiu.51yanmei.com;

    ssl_certificate     /etc/letsencrypt/live/jiu.51yanmei.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/jiu.51yanmei.com/privkey.pem;
    ssl_protocols       TLSv1.2 TLSv1.3;
    ssl_ciphers         HIGH:!aNULL:!MD5;

    client_max_body_size 20m;

    # 商品图片静态文件
    location ^~ /images/ {
        alias /opt/jiu/images/;
        expires 30d;
        add_header Cache-Control "public, immutable";
    }

    # 文件导入接口（超时更长）
    location ~ ^/api/v1/import/ {
        proxy_pass         http://127.0.0.1:8080;
        proxy_set_header   Host $host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_read_timeout 300s;
    }

    # 未鉴权公开/登录接口：加最外层 per-IP 限流（鉴权后的业务 API 不在此限，交后端按店限流）。
    # 须定义在通用 /api 正则之前（nginx 正则 location 按书写顺序首个命中者生效）。
    location ~ ^/api/v1/(public|auth)/ {
        limit_req          zone=jiu_pub burst=20 nodelay;
        proxy_pass         http://127.0.0.1:8080;
        proxy_set_header   Host $host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_read_timeout 30s;
    }

    # API 反向代理
    location ~ ^/(api|health|version) {
        proxy_pass         http://127.0.0.1:8080;
        proxy_set_header   Host $host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_read_timeout 30s;
    }

    # Flutter 管理端（仅 /app/ 前缀，不污染根路径）
    location /app/ {
        alias /opt/jiu/web/;
        index index.html;
        try_files $uri $uri/ /app/index.html;
    }

    # index.html 不缓存，确保每次发版后浏览器加载最新版
    location = /app/index.html {
        alias /opt/jiu/web/index.html;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        expires 0;
    }

    # 公开商品详情页（扫码跳转）→ 后端注入 OG 标签后返回 Flutter index.html
    location ~ ^/product/ {
        limit_req          zone=jiu_pub burst=20 nodelay;
        proxy_pass         http://127.0.0.1:8080;
        proxy_set_header   Host $host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_read_timeout 30s;
    }

    # Flutter 路由会把 /product/:id 重写为 /app/product/:id（base-href=/app/）
    # 分享此 URL 时微信爬虫也需要 OG 标签 → 去掉 /app 前缀后转发后端
    location ~ ^/app/product/ {
        limit_req          zone=jiu_pub burst=20 nodelay;
        rewrite ^/app(/product/.+)$ $1 break;
        proxy_pass         http://127.0.0.1:8080;
        proxy_set_header   Host $host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_read_timeout 30s;
    }

    # 桌面客户端安装包下载（Windows .exe / macOS .zip）
    location /downloads/ {
        alias /opt/jiu/downloads/;
        add_header Content-Disposition "attachment";
        add_header Cache-Control "no-cache";
        autoindex off;
    }

    # 营销站点兜底（根路径及所有其他路径）
    location / {
        root /opt/jiu/marketing;
        try_files $uri $uri.html $uri/index.html /index.html;
    }
}

server {
    listen 80;
    server_name jiu.51yanmei.com;
    return 301 https://$host$request_uri;
}