# PolyHermes Nginx 反向代理配置示例
# 
# 适用于生产环境，在 Docker 容器外部部署 Nginx 作为反向代理
# 
# 使用场景：
# - SSL/TLS 终止（HTTPS）
# - 域名绑定
# - 负载均衡
# - 更灵活的配置
#
# 部署步骤：
# 1. 将本文件复制到 /etc/nginx/sites-available/polyhermes
# 2. 创建软链接: ln -s /etc/nginx/sites-available/polyhermes /etc/nginx/sites-enabled/
# 3. 修改配置中的域名和 SSL 证书路径
# 4. 测试配置: nginx -t
# 5. 重载配置: systemctl reload nginx

# HTTP 服务器（可选：用于重定向到 HTTPS）
server {
    listen 80;
    server_name your-domain.com www.your-domain.com;

    # 重定向到 HTTPS
    return 301 https://$server_name$request_uri;
}

# HTTPS 服务器
server {
    listen 443 ssl http2;
    server_name your-domain.com www.your-domain.com;

    # SSL 证书配置（使用 Let's Encrypt 或其他证书）
    ssl_certificate /etc/letsencrypt/live/your-domain.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/your-domain.com/privkey.pem;

    # SSL 安全配置
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers 'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384';
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;

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

    # 日志
    access_log /var/log/nginx/polyhermes-access.log;
    error_log /var/log/nginx/polyhermes-error.log;

    # 客户端最大上传大小
    client_max_body_size 10M;

    # 上游服务（Docker 容器）
    # 如果使用 docker-compose，容器名是 polyhermes，端口是 80
    upstream polyhermes_backend {
        server 127.0.0.1:80;
        # 如果需要负载均衡，可以添加多个后端：
        # server 127.0.0.1:8001;
        # server 127.0.0.1:8002;
    }

    # API 代理
    location /api {
        proxy_pass http://polyhermes_backend;
        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;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port $server_port;
        
        # 超时设置
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
        
        # 缓冲设置
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;
        proxy_busy_buffers_size 8k;
    }

    # WebSocket 代理
    location /ws {
        proxy_pass http://polyhermes_backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        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;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port $server_port;
        
        # WebSocket 超时设置（长连接）
        proxy_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
    }

    # 前端静态文件代理
    location / {
        proxy_pass http://polyhermes_backend;
        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;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port $server_port;
        
        # 静态资源缓存（由后端 Nginx 处理）
        proxy_cache_valid 200 1y;
    }

    # 健康检查（可选）
    location /health {
        proxy_pass http://polyhermes_backend;
        access_log off;
    }
}

# 如果不需要 HTTPS，可以使用以下简化配置
# server {
#     listen 80;
#     server_name your-domain.com www.your-domain.com;
#
#     access_log /var/log/nginx/polyhermes-access.log;
#     error_log /var/log/nginx/polyhermes-error.log;
#
#     client_max_body_size 10M;
#
#     upstream polyhermes_backend {
#         server 127.0.0.1:80;
#     }
#
#     location /api {
#         proxy_pass http://polyhermes_backend;
#         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;
#     }
#
#     location /ws {
#         proxy_pass http://polyhermes_backend;
#         proxy_http_version 1.1;
#         proxy_set_header Upgrade $http_upgrade;
#         proxy_set_header Connection "upgrade";
#         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;
#         proxy_read_timeout 86400;
#         proxy_send_timeout 86400;
#     }
#
#     location / {
#         proxy_pass http://polyhermes_backend;
#         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;
#     }
# }