# RWADurian API Gateway Nginx 配置
# 域名: rwaapi.szaiai.com
# 后端: Kong API Gateway (端口 8000)
# 放置路径: /etc/nginx/sites-available/rwaapi.szaiai.com
# 启用: ln -s /etc/nginx/sites-available/rwaapi.szaiai.com /etc/nginx/sites-enabled/

# HTTP 重定向到 HTTPS
server {
    listen 80;
    listen [::]:80;
    server_name rwaapi.szaiai.com;

    # Let's Encrypt 验证目录
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    # 重定向到 HTTPS
    location / {
        return 301 https://$host$request_uri;
    }
}

# HTTPS 配置
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name rwaapi.szaiai.com;

    # SSL 证书 (Let's Encrypt)
    ssl_certificate /etc/letsencrypt/live/rwaapi.szaiai.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/rwaapi.szaiai.com/privkey.pem;

    # SSL 配置优化
    ssl_session_timeout 1d;
    ssl_session_cache shared:SSL:50m;
    ssl_session_tickets off;

    # 现代加密套件
    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:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;

    # HSTS
    add_header Strict-Transport-Security "max-age=63072000" always;

    # 日志
    access_log /var/log/nginx/rwaapi.szaiai.com.access.log;
    error_log /var/log/nginx/rwaapi.szaiai.com.error.log;

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

    # 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 Referrer-Policy "strict-origin-when-cross-origin" always;

    # 客户端请求大小限制 (500MB 用于 APK/IPA 上传)
    client_max_body_size 500M;

    # 反向代理到 Kong API Gateway
    location / {
        proxy_pass http://127.0.0.1:8000;
        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;
        proxy_cache_bypass $http_upgrade;

        # 超时设置 (适配大文件上传)
        proxy_connect_timeout 60s;
        proxy_send_timeout 300s;
        proxy_read_timeout 300s;

        # 缓冲设置
        proxy_buffering on;
        proxy_buffer_size 128k;
        proxy_buffers 4 256k;
        proxy_busy_buffers_size 256k;
    }

    # Kong Admin API (可选，仅内网访问)
    # location /kong-admin/ {
    #     allow 127.0.0.1;
    #     allow 10.0.0.0/8;
    #     allow 172.16.0.0/12;
    #     allow 192.168.0.0/16;
    #     deny all;
    #     proxy_pass http://127.0.0.1:8001/;
    #     proxy_http_version 1.1;
    #     proxy_set_header Host $host;
    #     proxy_set_header X-Real-IP $remote_addr;
    # }

    # 健康检查端点 (直接返回)
    location = /health {
        access_log off;
        return 200 '{"status":"ok","service":"rwaapi-nginx"}';
        add_header Content-Type application/json;
    }
}