# 로컬 개발 환경용 nginx 설정 (localhost, 자체 서명 인증서)
# MultiChart / 실시간 차트용 Native WebSocket (Spring /ws/realtime) — 누락 시 wss 연결 실패(Code 1006)·로딩 무한 대기

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

# HTTP 서버 (HTTPS로 리다이렉트 또는 직접 서비스)
server {
    listen 80;
    server_name localhost 127.0.0.1;
    
    # 개발 환경에서는 HTTP로도 접근 가능 (선택사항: HTTPS로 리다이렉트)
    # return 301 https://$host$request_uri;
    
    root /usr/share/nginx/html;
    index index.html;
    
    # React Router를 위한 설정
    location / {
        try_files $uri $uri/ /index.html;
    }
    
    # AI Agent 프록시 (LangGraph 기반)
    location /api/agent/ {
        proxy_pass http://ai-agent:8000/;
        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_cache_bypass $http_upgrade;
        proxy_read_timeout 300s;
        proxy_connect_timeout 75s;
        proxy_buffering off;
    }
    
    # API 프록시 (Spring Boot 백엔드)
    location /api/ {
        proxy_pass http://backend:8082/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_set_header X-Forwarded-Proto $scheme;
        proxy_cache_bypass $http_upgrade;
        proxy_read_timeout 300s;
        proxy_connect_timeout 75s;
    }

    # WebSocket (실시간 캔들 /ws/realtime — nginx.conf 와 동일)
    location /ws {
        proxy_pass http://backend:8082;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $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;
    }
}

# HTTPS 서버 (자체 서명 인증서)
server {
    listen 443 ssl http2;
    server_name localhost 127.0.0.1;
    
    # 자체 서명 SSL 인증서 설정
    ssl_certificate /etc/nginx/ssl/server.crt;
    ssl_certificate_key /etc/nginx/ssl/server.key;
    
    # SSL 보안 설정
    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;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;
    
    root /usr/share/nginx/html;
    index index.html;
    
    # gzip 압축
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
    gzip_min_length 1000;
    
    # React Router를 위한 설정
    location / {
        try_files $uri $uri/ /index.html;
        
        # index.html 캐시 방지 (항상 최신 버전 제공)
        location = /index.html {
            add_header Cache-Control "no-cache, no-store, must-revalidate";
            add_header Pragma "no-cache";
            add_header Expires "0";
        }
    }
    
    # AI Agent 프록시 (LangGraph 기반)
    location /api/agent/ {
        proxy_pass http://ai-agent:8000/;
        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_cache_bypass $http_upgrade;
        proxy_read_timeout 300s;
        proxy_connect_timeout 75s;
        proxy_buffering off;
    }
    
    # API 프록시 (Spring Boot 백엔드)
    location /api/ {
        proxy_pass http://backend:8082/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_set_header X-Forwarded-Proto $scheme;
        proxy_cache_bypass $http_upgrade;
        proxy_read_timeout 300s;
        proxy_connect_timeout 75s;
        
        # CORS는 백엔드(Spring Boot)에서 처리하므로 Nginx에서는 제거
    }

    # WebSocket (wss://localhost/ws/realtime → Spring RealtimeWebSocketHandler)
    location /ws {
        proxy_pass http://backend:8082;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $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;
    }
    
    # 정적 파일 캐싱
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }
}