# ============================================
# CaStAD Nginx Configuration
# ============================================
# 도메인:
#   - castad.ktenterprise.net
#   - ado2.whitedonkey.kr
# ============================================

# Upstream 설정
upstream castad_backend {
    server 127.0.0.1:3001;
    keepalive 64;
}

upstream castad_instagram {
    server 127.0.0.1:5001;
    keepalive 32;
}

# HTTP → HTTPS 리다이렉트
server {
    listen 80;
    listen [::]:80;
    server_name castad.ktenterprise.net ado2.whitedonkey.kr;

    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    location / {
        return 301 https://$host$request_uri;
    }
}

# HTTPS 서버 설정
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name castad.ktenterprise.net ado2.whitedonkey.kr;

    # SSL 인증서 (Let's Encrypt)
    ssl_certificate /etc/letsencrypt/live/castad.ktenterprise.net/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/castad.ktenterprise.net/privkey.pem;

    # SSL 설정
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    ssl_session_tickets off;

    # HSTS
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

    # 기타 보안 헤더
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;

    # 로그
    access_log /var/log/nginx/castad_access.log;
    error_log /var/log/nginx/castad_error.log;

    # 파일 업로드 크기 제한 (영상 업로드용)
    client_max_body_size 500M;
    client_body_timeout 300s;

    # 정적 파일 캐싱 (프론트엔드 빌드 파일)
    root /var/www/castad/dist;
    index index.html;

    # Gzip 압축
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_types text/plain text/css text/xml text/javascript application/javascript application/json application/xml;
    gzip_comp_level 6;

    # 정적 자원 캐싱
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # API 요청 → Backend
    location /api/ {
        proxy_pass http://castad_backend;
        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;
    }

    # 렌더링 요청 → Backend (긴 타임아웃)
    location /render {
        proxy_pass http://castad_backend;
        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_read_timeout 600s;
        proxy_connect_timeout 75s;
        proxy_buffering off;
    }

    # 다운로드 파일
    location /downloads/ {
        proxy_pass http://castad_backend;
        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;
    }

    # 임시 파일
    location /temp/ {
        proxy_pass http://castad_backend;
        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;
    }

    # 업로드된 에셋
    location /uploads/ {
        proxy_pass http://castad_backend;
        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;
    }

    # Instagram 서비스 (내부 프록시)
    location /instagram-service/ {
        internal;
        proxy_pass http://castad_instagram/;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
    }

    # SPA 라우팅 - 모든 요청을 index.html로
    location / {
        try_files $uri $uri/ /index.html;
    }

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