pid /var/log/nginx/nginx.pid;

events {
    worker_connections 1024;
}

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

    # 로그 설정
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;
    error_log   /var/log/nginx/error.log warn;

    sendfile        on;
    keepalive_timeout   65;

    # user 1000:1000 실행 시 /var/cache/nginx 접근 불가 → logs 경로로 우회
    client_body_temp_path /var/log/nginx/client_temp;
    proxy_temp_path       /var/log/nginx/proxy_temp;
    fastcgi_temp_path     /var/log/nginx/fastcgi_temp;
    uwsgi_temp_path       /var/log/nginx/uwsgi_temp;
    scgi_temp_path        /var/log/nginx/scgi_temp;

    # 업로드 파일 크기 / 타임아웃 (10GB, 10분)
    client_max_body_size  10G;
    client_body_timeout   600s;

    # Docker 내부 DNS - 시작 시 upstream 조회 실패 방지
    resolver 127.0.0.11 valid=30s ipv6=off;

    # HTTP → HTTPS 리다이렉트 서버
    server {
        listen 80;
        server_name api.train-kamco.com train-kamco.com;

        # 모든 HTTP 요청을 HTTPS로 리다이렉트
        return 301 https://$host$request_uri;
    }

    # HTTPS 서버 설정
    server {
        listen 443 ssl;
        http2 on;
        server_name api.train-kamco.com;

        ssl_certificate     /etc/nginx/ssl/train-kamco.com.crt;
        ssl_certificate_key /etc/nginx/ssl/train-kamco.com.key;

        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:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384';
        ssl_prefer_server_ciphers off;

        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;

        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;

        # CORS 헤더
        add_header Access-Control-Allow-Origin      "https://train-kamco.com" always;
        add_header Access-Control-Allow-Methods     "GET, POST, PUT, DELETE, PATCH, OPTIONS" always;
        add_header Access-Control-Allow-Headers     "Authorization, Content-Type, Cookie, X-Requested-With" always;
        add_header Access-Control-Allow-Credentials "true" always;

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

            set $api http://kamco-train-api:8080;
            proxy_pass $api;
            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 X-Forwarded-Host $server_name;
            proxy_pass_request_headers on;
            proxy_set_header Cookie $http_cookie;
            proxy_set_header Authorization $http_authorization;

            proxy_connect_timeout 600s;
            proxy_send_timeout    600s;
            proxy_read_timeout    600s;

            proxy_request_buffering off;
            proxy_buffering         off;
        }

        location /monitor/health {
            set $api http://kamco-train-api:8080;
            proxy_pass $api/monitor/health;
            access_log off;
        }
    }

    # HTTPS 서버 설정 - Next.js Web Application
    server {
        listen 443 ssl;
        http2 on;
        server_name train-kamco.com;

        ssl_certificate     /etc/nginx/ssl/train-kamco.com.crt;
        ssl_certificate_key /etc/nginx/ssl/train-kamco.com.key;

        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:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384';
        ssl_prefer_server_ciphers off;

        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;

        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;

        location /api/ {
            set $api http://kamco-train-api:8080;
            proxy_pass $api/api/;
            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 X-Forwarded-Host $server_name;
            proxy_pass_request_headers on;
            proxy_set_header Cookie $http_cookie;

            proxy_connect_timeout 600s;
            proxy_send_timeout    600s;
            proxy_read_timeout    600s;

            proxy_request_buffering off;
            proxy_buffering         off;
        }

        location / {
            set $web http://kamco-train-web:3002;
            proxy_pass $web;
            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 X-Forwarded-Host $server_name;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            proxy_connect_timeout 600s;
            proxy_send_timeout    600s;
            proxy_read_timeout    600s;

            proxy_buffering on;
            proxy_buffer_size 4k;
            proxy_buffers 8 4k;
            proxy_busy_buffers_size 8k;
        }
    }
}