# chatbotApp 단독 웹서버 — Next.js 정적 UI + 챗 API 프록시
# 기본 upstream: https://chatbot.exdev.co.kr (Caddy → kakaoChatbotSkill /web/ask)
# 로컬 kakao-skill(:8083) 사용 시:
#   CHATBOT_API_UPSTREAM=http://host.docker.internal:8083/web/
#   CHATBOT_API_HOST=host.docker.internal
# 레거시 RAG 직접(:28012) 사용 시:
#   CHATBOT_API_UPSTREAM=http://host.docker.internal:28012/chatbot/
#
# Next.js 빌드(basePath=/chatbot/app)의 CSS·JS는 /chatbot/app/_next/ 경로를 사용합니다.
# /chatbot/ API 프록시보다 정적 location을 먼저 두어야 스타일이 적용됩니다.

map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
}

server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    client_max_body_size 1m;

    # Next.js 정적 자산 + SPA (운영과 동일 경로 /chatbot/app/, /chatbot/ai/)
    location = /chatbot/app {
        return 301 /chatbot/app/;
    }

    location ^~ /chatbot/app/ {
        alias /usr/share/nginx/html/;
        index index.html;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }

    location = /chatbot/ai {
        return 301 /chatbot/ai/;
    }

    location ^~ /chatbot/ai/ {
        alias /usr/share/nginx/html-ai/;
        index index.html;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }

    location = /chatbot/banner {
        return 301 /chatbot/banner/;
    }

    location ^~ /chatbot/banner/ {
        alias /usr/share/nginx/html-banner/;
        index index.html;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Content-Security-Policy "frame-ancestors *" always;
    }

    location = /chatbot/sample {
        return 301 /chatbot/sample/;
    }

    location ^~ /chatbot/sample/ {
        alias /usr/share/nginx/html-sample/;
        index index.html;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Permissions-Policy "microphone=*, camera=()" always;
    }

    location = /chatbot/voicebot {
        return 301 /chatbot/voicebot/;
    }

    location ^~ /chatbot/voicebot/ {
        alias /usr/share/nginx/html-voicebot/;
        index index.html;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Content-Security-Policy "frame-ancestors *" always;
        add_header Permissions-Policy "microphone=*, camera=()" always;
    }

    # 루트 접속 → basePath와 동일 URL로 이동
    location = / {
        return 302 /chatbot/app/;
    }

    # RAG API (ask/stream/faq/session/health 등) — 원격 exAiChatBot 또는 로컬 RAG
    location /chatbot/ {
        proxy_pass ${CHATBOT_API_UPSTREAM};
        proxy_http_version 1.1;
        proxy_ssl_server_name on;
        proxy_set_header Host ${CHATBOT_API_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 10s;
        proxy_read_timeout 120s;
        proxy_send_timeout 120s;
        proxy_buffering off;
    }

    location / {
        try_files $uri $uri/ /index.html;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }
}