worker_processes auto;

events {
    worker_connections 1024;
}

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

    # 성능 최적화
    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay     on;
    keepalive_timeout  65;

    # Gzip 압축
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;

    # 프록시 캐시 설정 (terrain/tileset용)
    proxy_cache_path /var/cache/nginx/tiles levels=1:2 keys_zone=tile_cache:100m max_size=1g inactive=24h;

    # 업스트림 정의
    upstream spring_app {
        server host.docker.internal:8080;
        keepalive 32;
    }

    upstream gis_3d_manager {
        server 10.100.232.242:3004;
        keepalive 16;
    }

    upstream gis_2d_server {
        server 10.100.232.241:3004;
        keepalive 16;
    }

    upstream gis_basemap {
        server 10.100.232.211:8083;
        keepalive 16;
    }

    upstream poi_search {
        server 10.100.232.242:5000;
        keepalive 8;
    }

    upstream address_search {
        server 10.100.232.241:8983;
        keepalive 8;
    }

    upstream wind_server {
        server 10.100.232.242:4444;
        keepalive 8;
    }

    upstream llm_server {
        server all4solution.iptime.org:14142;
        keepalive 8;
    }

    server {
        listen 80;
        server_name localhost;

        # 타일 요청 캐시 설정
        proxy_cache tile_cache;
        proxy_cache_valid 200 1h;
        proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;

        # ============================================
        # GIS 프록시 (캐시 적용)
        # ============================================

        # 3D 매니저 (terrain, tileset)
        location /MapPrime3DManager/ {
            proxy_pass http://gis_3d_manager/MapPrime3DManager/;
            proxy_http_version 1.1;
            proxy_set_header Host 10.100.232.242:3004;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Connection "";

            # 캐시 헤더
            add_header Cache-Control "public, max-age=3600";
            add_header X-Cache-Status $upstream_cache_status;

            # CORS
            add_header Access-Control-Allow-Origin *;
        }

        # 2D 서버 (WMS, WFS)
        location /MapPrimeServer/map/wms {
            proxy_pass http://gis_2d_server/MapPrimeServer/map/wms;
            proxy_http_version 1.1;
            proxy_set_header Host 10.100.232.241:3004;
            proxy_set_header Connection "";
        }

        location /MapPrimeServer/map/wfs {
            proxy_pass http://gis_2d_server/MapPrimeServer/map/wfs;
            proxy_http_version 1.1;
            proxy_set_header Host 10.100.232.241:3004;
            proxy_set_header Connection "";
        }

        location /MapPrimeServer/rest/ {
            proxy_pass http://gis_2d_server/MapPrimeServer/rest/;
            proxy_http_version 1.1;
            proxy_set_header Host 10.100.232.241:3004;
            proxy_set_header Connection "";
        }

        # WMTS (배경지도)
        location /MapPrimeServer/map/wmts {
            proxy_pass http://gis_basemap/Basemap/map/wmts;
            proxy_http_version 1.1;
            proxy_set_header Host 10.100.232.211:8083;
            proxy_set_header Connection "";

            add_header Cache-Control "public, max-age=3600";
            add_header X-Cache-Status $upstream_cache_status;
        }

        # ============================================
        # 기타 GIS/검색 서비스 프록시
        # ============================================

        # POI 검색
        location /POISearch/ {
            proxy_pass http://poi_search/;
            proxy_http_version 1.1;
            proxy_set_header Host 10.100.232.242:5000;
            proxy_set_header Connection "";
        }

        # 주소 검색
        location /app/ {
            proxy_pass http://address_search/app/;
            proxy_http_version 1.1;
            proxy_set_header Host 10.100.232.241:8983;
            proxy_set_header Connection "";
        }

        # 3D 바람길 서버
        location /cmm/g3f/windServer/ {
            proxy_pass http://wind_server/;
            proxy_http_version 1.1;
            proxy_set_header Host 10.100.232.242:4444;
            proxy_set_header Connection "";
        }

        # 기상청 API (HTTPS 프록시)
        location /sgp/weather/ {
            proxy_pass https://apihub.kma.go.kr/;
            proxy_http_version 1.1;
            proxy_set_header Host apihub.kma.go.kr;
            proxy_set_header Connection "";
            proxy_ssl_server_name on;
        }

        # ============================================
        # LLM 웹소켓 프록시
        # ============================================
        location /llmConnection/ws/ {
            proxy_pass http://llm_server/ws/;
            proxy_http_version 1.1;
            proxy_set_header Host all4solution.iptime.org:14142;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

            # WebSocket 필수 헤더
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            # 5분 타임아웃
            proxy_connect_timeout 300s;
            proxy_send_timeout 300s;
            proxy_read_timeout 300s;
        }

        # ============================================
        # LLM HTTP API 프록시 (직접 LLM 서버로)
        # ============================================
        location /llmConnection/api/ {
            proxy_pass http://llm_server/api/;
            proxy_http_version 1.1;
            proxy_set_header Host all4solution.iptime.org:14142;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Connection "";

            # 5분 타임아웃
            proxy_connect_timeout 300s;
            proxy_send_timeout 300s;
            proxy_read_timeout 300s;
        }

        # ============================================
        # LLM API (Spring Boot 프록시 - 백업)
        # ============================================
        location /api/v1/llm/ {
            proxy_pass http://spring_app;
            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;
            proxy_set_header Connection "";

            # 5분 타임아웃 (LLM 응답 대기)
            proxy_connect_timeout 300s;
            proxy_send_timeout 300s;
            proxy_read_timeout 300s;
        }

        # ============================================
        # Spring Boot 앱 (나머지 요청)
        # ============================================
        location / {
            proxy_pass http://spring_app;
            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;
            proxy_set_header Connection "";

            # WebSocket 지원
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
    }
}