# 配置 DNS 解析器（使用 Docker 内置 DNS 解析容器名）
resolver 127.0.0.11 valid=30s;

server {
    listen 80;
    server_name localhost;

    # 开启 gzip 压缩
    gzip on;
    gzip_min_length 1k;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/javascript application/json application/javascript application/x-javascript application/xml;
    gzip_vary on;
    gzip_disable "MSIE [1-6]\.";

    root /usr/share/nginx/html;
    index index.html;

    # API 反向代理到后端服务
    # 后端容器名为 aiot-gateway，与本前端容器需在同一 Docker 网络（1panel-network）
    location /admin-api {
        client_max_body_size 100M;

        proxy_pass http://aiot-gateway:48080/admin-api;

        proxy_connect_timeout 10s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;

        # 后端短暂不可达时尝试一次重试
        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;
        proxy_next_upstream_tries 2;

        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;

        # 跨域响应头（仅作兜底，正常同域不会触发）
        add_header Access-Control-Allow-Origin * always;
        add_header Access-Control-Allow-Methods 'GET, POST, PUT, DELETE, OPTIONS' always;
        add_header Access-Control-Allow-Headers 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization' always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }
    }

    # SPA 路由刷新兜底
    location / {
        try_files $uri $uri/ /index.html;
    }

    # 静态资源缓存
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff2?)$ {
        expires 30d;
        add_header Cache-Control "public, no-transform";
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
}