# WebSocket 连接升级映射
# 有 Upgrade 头时发送 "upgrade"，否则发送空字符串（保持 keepalive）
# 参考: https://github.com/dani-garcia/vaultwarden/wiki/Proxy-examples
map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      "";
}

server {
    listen 80;
    listen [::]:80;
    server_name __DOMAIN__;

    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    location / {
        return 301 https://$host$request_uri;
    }
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name __DOMAIN__;

    # SSL 证书
    ssl_certificate     /etc/letsencrypt/live/__DOMAIN__/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/__DOMAIN__/privkey.pem;

    # SSL 参数
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;

    # 安全头
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header Referrer-Policy "same-origin" always;

    # 上传大小限制（附件上传）
    client_max_body_size 525M;

    # 反向代理到 Vaultwarden
    location / {
        proxy_pass http://127.0.0.1:8080;
        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;

        # WebSocket 支持（Vaultwarden 1.29+ 在同一端口）
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;

        # 超时设置
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

    # 管理员面板（可选：限制访问 IP）
    # location /admin {
    #     allow 你的IP;
    #     deny all;
    #     proxy_pass http://127.0.0.1:8080;
    #     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;
    # }
}