# Nginx配置文件 - 生产环境 (HTTPS版本)
# 用于Vue3前端静态文件服务和API代理
# 
# HTTPS证书配置说明:
# 1. 将SSL证书文件放置在 /etc/nginx/ssl/ 目录下
# 2. 证书文件: /etc/nginx/ssl/server.crt
# 3. 私钥文件: /etc/nginx/ssl/server.key
# 4. 如使用Let's Encrypt，路径为 /etc/letsencrypt/live/<domain>/

# HTTP -> HTTPS 重定向
server {
    listen 80;
    server_name _;

    # 健康检查端点（不重定向，供负载均衡器使用）
    location /health {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }

    # 所有其他HTTP请求重定向到HTTPS
    location / {
        return 301 https://$host$request_uri;
    }
}

# HTTPS主服务
server {
    listen 443 ssl http2;
    server_name _;

    # SSL证书配置
    ssl_certificate     /etc/nginx/ssl/server.crt;
    ssl_certificate_key /etc/nginx/ssl/server.key;

    # TLS协议版本（仅允许TLS 1.2和1.3）
    ssl_protocols TLSv1.2 TLSv1.3;

    # 强密码套件
    ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256';
    ssl_prefer_server_ciphers on;

    # SSL会话缓存
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    ssl_session_tickets off;

    # OCSP Stapling（需要CA证书链）
    # ssl_stapling on;
    # ssl_stapling_verify on;
    # ssl_trusted_certificate /etc/nginx/ssl/chain.crt;

    # 生产环境日志配置
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log error;

    # 安全响应头
    # HTTP Strict Transport Security (HSTS) - 强制HTTPS，有效期1年，包含子域名
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
    # 禁止在iframe中嵌入（防止点击劫持）
    add_header X-Frame-Options "SAMEORIGIN" always;
    # 禁止MIME类型嗅探
    add_header X-Content-Type-Options "nosniff" always;
    # XSS保护
    add_header X-XSS-Protection "1; mode=block" always;
    # Referrer策略
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    # 内容安全策略
    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'self'" always;
    # 权限策略（禁用不需要的浏览器功能）
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=(), payment=()" always;

    # Gzip压缩配置
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;

    # 静态文件服务
    location / {
        root /usr/share/nginx/html;
        index index.html index.htm;
        try_files $uri $uri/ /index.html;

        # 生产环境缓存配置
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
            access_log off;
        }

        location ~* \.(html)$ {
            expires 1h;
            add_header Cache-Control "public";
        }
    }

    # API代理到后端服务
    location /prod-api/ {
        proxy_pass http://anxin-backend: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;

        # 生产环境代理配置
        proxy_connect_timeout 10s;
        proxy_send_timeout 10s;
        proxy_read_timeout 10s;
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;

        # 限制请求大小
        client_max_body_size 5m;

        # 代理缓存配置
        proxy_cache_bypass $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Upgrade $http_upgrade;
    }

    # 健康检查端点
    location /health {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }

    # 拒绝访问敏感文件
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    location ~ ~$ {
        deny all;
        access_log off;
        log_not_found off;
    }
}