# =========================================================
# Request ID for correlation
# =========================================================
map $http_x_request_id $req_id {
    default $http_x_request_id;
    "" $request_id;
}

# =========================================================
# Backend interne (réseau Docker)
# =========================================================
upstream backend {
    server backend:8080;
    keepalive 32;
}

# =========================================================
# HTTP → HTTPS redirect
# =========================================================
server {
    listen 80;
    listen [::]:80;
    server_name 5.181.0.112.nip.io;
    return 301 https://$host$request_uri;
}

# =========================================================
# HTTPS Server (WAF)
# =========================================================
server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name 5.181.0.112.nip.io;

    ssl_certificate     /etc/nginx/certs/cert.pem;
    ssl_certificate_key /etc/nginx/certs/key.pem;
    ssl_protocols       TLSv1.2 TLSv1.3;
    ssl_ciphers         HIGH:!aNULL:!MD5;

    client_max_body_size 100M;

    modsecurity on;
    modsecurity_rules_file /etc/nginx/modsec/custom-rules.conf;

    location / {
        limit_except GET POST PUT PATCH DELETE OPTIONS { deny all; }

        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' "$http_origin" always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, PATCH, DELETE, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, X-Request-ID' always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            add_header 'Access-Control-Max-Age' 86400 always;
            add_header 'Content-Length' 0;
            add_header 'Content-Type' 'text/plain charset=UTF-8';
            return 204;
        }

        proxy_pass http://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_set_header X-Request-ID $req_id;
        proxy_set_header Connection "";

        proxy_connect_timeout 60s;
        proxy_send_timeout 300s;
        proxy_read_timeout 300s;
    }

    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    location ~* (\.env|\.git|package\.json|package-lock\.json|yarn\.lock|Dockerfile|docker-compose\.yml)$ {
        deny all;
        access_log off;
        log_not_found off;
    }
}