# Nginx 配置文件 - Docker 部署版本
# 用于 docker-compose 部署，使用 Docker 服务名进行服务发现

# 上游后端服务器（使用 Docker 服务名）
upstream backend {
    server backend:3001;  # 使用 Docker Compose 服务名
    keepalive 64;
}

# HTTP 服务器配置
server {
    listen 80;
    server_name _;  # 匹配所有域名和 IP
    
    # 客户端最大请求体大小
    client_max_body_size 10M;
    
    # 日志配置
    access_log /var/log/nginx/ai-learning-access.log;
    error_log /var/log/nginx/ai-learning-error.log;
    
    # 前端静态文件
    location / {
        root /usr/share/nginx/html;
        index index.html;
        try_files $uri $uri/ /index.html;
        
        # 静态资源缓存
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
        }
    }
    
    # API 代理
    location /api {
        proxy_pass http://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_cache_bypass $http_upgrade;
        
        # 超时设置
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }
    
    # 健康检查
    location /health {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }
}