server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # 开启gzip压缩
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/javascript application/json;

    # WebSocket 反代（聊天等实时功能）
    location /ws/ {
        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_read_timeout 3600s;
        proxy_send_timeout 3600s;
    }

    # API 反代（路由分散在 /api /user /bug /article /chat /learn /message /tool /history /media 等前缀下）
    location ~ ^/(api|user|bug|article|chat|learn|message|tool|history|media)/ {
        proxy_pass http://127.0.0.1:8000;
        proxy_http_version 1.1;
        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 Content-Type $http_content_type;
        proxy_read_timeout 60s;
        proxy_send_timeout 60s;
        client_max_body_size 50M;
    }

    # 静态资源缓存（图片/字体/JS/CSS）
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # SPA 路由回退（放在最后，避免拦截上面的 API 请求）
    location / {
        try_files $uri $uri/ /index.html;
    }
}