# =============================================================================
# 企微IT智能服务台 — Nginx 反向代理配置
# =============================================================================
# 部署说明：
#   - 本 nginx 运行在 Docker 容器内，负责统一路由
#   - 数据查询平台运行在**另一台主机**，通过 proxy_pass 转发
#   - 修改 DATAQUERY_HOST 为数据平台实际 IP 地址
#
# 路由规则：
#   /itdesk/   → H5 员工端静态文件
#   /itagent/  → 坐席工作台静态文件
#   /itportal/ → 统一入口（角色选择）静态文件
#   /api/      → 后端 FastAPI（容器名 backend:8000）
#   /ws/       → WebSocket（容器名 backend:8000，支持升级）
#   /          → IT 数据查询平台（远程主机）
# =============================================================================

events {
    worker_connections 1024;
}

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

    # ------------------------------------------------------------------
    # 日志格式
    # ------------------------------------------------------------------
    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;
    error_log  /var/log/nginx/error.log warn;

    # ------------------------------------------------------------------
    # 基础配置
    # ------------------------------------------------------------------
    sendfile           on;
    tcp_nopush        on;
    tcp_nodelay       on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 50m;   # 支持文件上传（企微媒体文件）

    # ------------------------------------------------------------------
    # Gzip 压缩（前端静态资源）
    # ------------------------------------------------------------------
    gzip            on;
    gzip_vary       on;
    gzip_min_length 1024;
    gzip_types      text/plain text/css text/xml text/javascript
                   application/javascript application/xml+rss
                   application/json application/ld+json;

    # =================================================================
    # 上游服务定义（Docker 内部网络）
    # =================================================================
    upstream backend_api {
        server backend:8000;
    }

    # =================================================================
    # 主服务：监听 80 端口
    # =================================================================
    server {
        listen 80;
        server_name _;

        # ------------------------------------------------------------------
        # 健康检查端点（用于 Docker healthcheck）
        # ------------------------------------------------------------------
        location = /itdesk/health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }

        # ------------------------------------------------------------------
        # H5 员工端 — /itdesk/
        # ------------------------------------------------------------------
        # 注意：alias + try_files $uri/ 会导致 301 重定向死循环，
        #       移除 $uri/ 避免触发 nginx 的目录重定向行为
        location /itdesk/ {
            alias /usr/share/nginx/html/itdesk/;
            index index.html;
            try_files $uri /itdesk/index.html;
        }

        # ------------------------------------------------------------------
        # 坐席工作台 — /itagent/
        # ------------------------------------------------------------------
        location /itagent/ {
            alias /usr/share/nginx/html/itagent/;
            index index.html;
            try_files $uri /itagent/index.html;
        }

        # ------------------------------------------------------------------
        # 管理后台 — /itadmin/
        # ------------------------------------------------------------------
        location /itadmin/ {
            alias /usr/share/nginx/html/itadmin/;
            index index.html;
            try_files $uri /itadmin/index.html;
        }

        # ------------------------------------------------------------------
        # 统一入口 Portal — /itportal/
        # ------------------------------------------------------------------
        location /itportal/ {
            alias /usr/share/nginx/html/itportal/;
            index index.html;
            try_files $uri /itportal/index.html;
        }

        # ------------------------------------------------------------------
        # 后端 API — /api/
        # ------------------------------------------------------------------
        location /api/ {
            proxy_pass http://backend_api/;
            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（AI 回复可能较慢）
            proxy_connect_timeout 60s;
            proxy_send_timeout    300s;
            proxy_read_timeout    300s;
        }

        # ------------------------------------------------------------------
        # WebSocket — /ws/（坐席端实时通信）
        # ------------------------------------------------------------------
        location /ws/ {
            proxy_pass http://backend_api;
            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_read_timeout 86400s;  # WebSocket 长连接
        }

        # ------------------------------------------------------------------
        # IT 数据查询平台 — /（根路径，反代到远程主机）
        # ------------------------------------------------------------------
        # 说明：数据查询平台部署在另一台主机，
        #       通过 Nginx 反代实现同一域名下访问。
        #       修改 $dataquery_host 为实际 IP。
        # ------------------------------------------------------------------
        location / {
            # 数据平台远程主机（修改为实际 IP）
            # 方式1：在 /etc/nginx/nginx.conf 同目录放 env 文件
            # 方式2：docker-compose.yml 中通过 command 覆盖
            proxy_pass http://10.80.0.130:8080;  # ← 修改为数据平台实际 IP:端口
            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 30s;
            proxy_send_timeout    60s;
            proxy_read_timeout    60s;
        }
    }
}