error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
    access_log /var/log/nginx/access.log main;

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;

    # Gzip 压缩1
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript;

    # --- 后端服务定义 (Upstreams) ---
    # 根据您的描述更新了端口号
    
    # 认证中心 (IdentityServer4)
    upstream auth_server {
        server sys-api:19902;
    }
    
    # Sys 系统 API
    upstream sys_api {
        server sys-api:19901;
    }
    
    # Lmg 系统 API
    upstream lmg_api {
        server lmg-api:19903;
    }
    
    # Sys 系统 UI
    upstream sys_ui {
        server sys-ui:80;
    }

    # Lmg 系统 UI
    upstream lmg_ui {
        server lmg-ui:80;
    }

    # --- 统一网关服务 ---
    server {
        listen 8000 ssl http2; # 使用 http2 提升性能
        server_name 106.52.199.114; # 替换为您的域名或IP

        # --- SSL 配置 ---
        ssl_certificate /etc/nginx/certs/server.crt;
        ssl_certificate_key /etc/nginx/certs/server.key;
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_prefer_server_ciphers on;
        ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;

        # --- 统一代理头配置 ---
        # 这些头对后端服务正确识别客户端信息至关重要
        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;

        # --- 路由规则 (Locations) ---

        # 1. 认证中心 (IdentityServer4) 路由
        # 匹配所有认证相关的路径
        location ~ ^/(connect|Account|\\.well-known)/ {
            proxy_pass http://auth_server;
        }

        # 2. Sys API 路由
        location /api/sys/ {
            # 将 /api/sys/path -> http://sys_api/api/sys/path
            proxy_pass http://sys_api; 
        }

        # 3. Lmg API 路由
        location /api/lmg/ {
            # 将 /api/lmg/path -> http://lmg_api/api/lmg/path
            proxy_pass http://lmg_api; 
        }

        # 4. Lmg UI 路由
        # IMPORTANT: lmg-ui 的前端路由基础路径(base path)需要配置为 /lmg/
        location /lmg/ {
            # 将 /lmg/path -> http://lmg_ui/path
            proxy_pass http://lmg_ui/; 
        }
        
        # 5. Sys UI 和根路径路由
        # IMPORTANT: sys-ui 的前端路由基础路径(base path)需要配置为 /
        # 或者如果你想用 /sys/ 访问，则前端基础路径配 /sys/
        location / {
            # 根路径 / 直接访问 sys_ui
            # 将 /path -> http://sys_ui/path
            proxy_pass http://sys_ui;
        }

        # 6. OAuth 回调地址路由
        # 这个回调是给客户端(UI)的，这里我们假设它由 sys-ui 处理
        location = /Callback {
            # 将 /Callback -> http://sys_ui/Callback
            proxy_pass http://sys_ui;
        }
    }
}