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

events {
    worker_connections 1024;
}

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;
    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;

    # Sys 系统 API
    upstream sys_api {
        server sys-api:19902;
    }
    
    # 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;
    }

    # ======================
    # 1. IdentityServer4 专用端口 (8001)
    # ======================
    server {
        listen 8001 ssl;
        server_name 106.52.199.114;
        ssl_certificate     /etc/nginx/certs/gateway.crt;
        ssl_certificate_key /etc/nginx/certs/gateway.key;
        ssl_protocols       TLSv1.2 TLSv1.3;
        ssl_ciphers         HIGH:!aNULL:!MD5;
        # 统一代理头（确保IdentityServer获取真实客户端信息）
        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;
        # 所有IdentityServer路由（无需/auth前缀）
        location / {
            proxy_pass https://sys_api;
            
            # HTTPS后端配置
            proxy_ssl_server_name on;
            proxy_ssl_verify      off;
            
            # 关键：重写后端返回的Location头（防止重定向到内部端口）
            proxy_redirect https://sys-api:19902/ https://$host:8001/;
        }
        # 单独处理发现文档，确保issuer正确
        location = /.well-known/openid-configuration {
            proxy_pass https://sys_api/.well-known/openid-configuration;
            
            # 动态修改返回的JSON中的URL
            proxy_set_header Accept-Encoding "";
            sub_filter_types application/json;
            sub_filter_once off;
            sub_filter '"issuer":"' '"issuer":"https://$host:8001"';
            sub_filter 'https://sys-api:19902' 'https://$host:8001';
        }
    }

    # --- 统一网关服务 ---
    server {
        listen 8000 ssl; # 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/gateway.crt;
        ssl_certificate_key /etc/nginx/certs/gateway.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;

        # 2. Sys API 路由
        location /api/sys/ {
            proxy_pass https://sys_api/api/;
            proxy_ssl_server_name on;
            proxy_ssl_session_reuse off;
            proxy_ssl_verify off;
            proxy_set_header Authorization $http_authorization;  # 传递 Authorization 头
        }
        # 3. Lmg API 路由
        location /api/lmg/ {
            proxy_pass https://lmg_api/api/; 
            proxy_ssl_server_name on;
            proxy_ssl_session_reuse off;
            proxy_ssl_verify off;
            proxy_set_header Authorization $http_authorization;  # 传递 Authorization 头
        }

        # 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
        location / {
            # 根路径 / 直接访问 sys_ui
            # 将 /path -> http://sys_ui/path
            proxy_pass http://sys_ui;
        }

    }
}