#===============================================================================
# iConsulting Nginx 配置
#
# 域名: iconsulting.szaiai.com
#
# 路由规则:
#   /              -> web-client (用户前端)
#   /admin         -> admin-client (管理后台)
#   /api/v1/*      -> Kong API Gateway
#   /ws/*          -> WebSocket (conversation-service)
#
#===============================================================================

# HTTP -> HTTPS 重定向
server {
    listen 80;
    server_name iconsulting.szaiai.com;

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

    # 健康检查端点 (不重定向)
    location /health {
        access_log off;
        return 200 'OK';
        add_header Content-Type text/plain;
    }

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

# HTTPS 主服务
server {
    listen 443 ssl http2;
    server_name iconsulting.szaiai.com;

    # SSL 证书配置
    ssl_certificate /etc/nginx/ssl/fullchain.pem;
    ssl_certificate_key /etc/nginx/ssl/privkey.pem;

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

    # 现代 SSL 配置
    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 (启用后浏览器会强制使用 HTTPS)
    add_header Strict-Transport-Security "max-age=63072000" always;

    # 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;

    # 健康检查端点
    location /health {
        access_log off;
        return 200 'OK';
        add_header Content-Type text/plain;
    }

    # 用户前端 (web-client)
    location / {
        root /usr/share/nginx/html/web;
        index index.html;
        try_files $uri $uri/ /index.html;

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

    # 管理后台 (admin-client)
    location /admin {
        alias /usr/share/nginx/html/admin;
        index index.html;
        try_files $uri $uri/ /admin/index.html;

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

    # API 请求代理到 Kong
    location /api/ {
        proxy_pass http://kong_upstream/;
        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;

        # 超时设置
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;

        # 缓冲设置
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;
    }

    # WebSocket 代理
    location /ws/ {
        proxy_pass http://websocket_upstream/;
        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;

        # WebSocket 超时 (保持长连接)
        proxy_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
    }

    # Socket.IO 专用路径
    location /socket.io/ {
        proxy_pass http://websocket_upstream/socket.io/;
        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_connect_timeout 7d;
        proxy_send_timeout 7d;
        proxy_read_timeout 7d;
    }

    # 禁止访问隐藏文件
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }
}