# /etc/nginx/sites-available/karate.ph.sokaris.link
#
# Production Nginx reverse proxy configuration for Karate Halloween Photo Booth
# Domain: karate.ph.sokaris.link
# Backend: Next.js PM2 process on 127.0.0.1:34822
# User: www-data

# Rate limiting zones (can be defined in http block in /etc/nginx/nginx.conf or here if http-level included)
limit_req_zone $binary_remote_addr zone=karate_api_limit:10m rate=10r/s;
limit_req_zone $binary_remote_addr zone=karate_auth_limit:10m rate=5r/m;

upstream karate_backend {
    server 127.0.0.1:34822;
    keepalive 32;
}

# HTTP: Redirect all traffic to HTTPS (and allow Let's Encrypt / Certbot challenges)
server {
    listen 80;
    listen [::]:80;
    server_name karate.ph.sokaris.link;

    # Certbot challenge directory
    location /.well-known/acme-challenge/ {
        root /var/www/html;
    }

    # Redirect all other HTTP traffic to HTTPS
    location / {
        return 301 https://$host$request_uri;
    }
}

# HTTPS: Secure proxy block
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name karate.ph.sokaris.link;

    # SSL Certificates (Managed by Let's Encrypt / Certbot)
    ssl_certificate /etc/letsencrypt/live/karate.ph.sokaris.link/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/karate.ph.sokaris.link/privkey.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    # Maximum upload size for photo uploads (15MB)
    client_max_body_size 15M;

    # Camera Access & Security Policy Headers
    add_header Permissions-Policy "camera=(self), microphone=()" always;
    add_header Feature-Policy "camera 'self'; microphone 'none'" 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;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    # Logs
    access_log /var/log/nginx/karate_photobooth_access.log;
    error_log /var/log/nginx/karate_photobooth_error.log;

    # 1. Block access to hidden files and directories (.git, .env, etc.)
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    # 2. Block access to sensitive and executable file extensions
    location ~* \.(env|git|bak|config|sql|sh|exe|bat|cmd|py|php|cgi)$ {
        deny all;
        access_log off;
        log_not_found off;
    }

    # Next.js static asset caching (immutable, high performance)
    location /_next/static/ {
        proxy_pass http://karate_backend;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        expires 365d;
        access_log off;
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # Public static assets
    location /assets/ {
        proxy_pass http://karate_backend;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        expires 30d;
        add_header Cache-Control "public, max-age=2592000";
    }

    # Rate-limited auth endpoint
    location = /api/portal/auth {
        limit_req zone=karate_auth_limit burst=5 nodelay;
        limit_req_status 429;

        proxy_pass http://karate_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;
    }

    # Rate-limited general API endpoints
    location /api/ {
        limit_req zone=karate_api_limit burst=25 nodelay;
        limit_req_status 429;

        proxy_pass http://karate_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_connect_timeout 60s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;
        proxy_buffering off;
    }

    # Main Application Proxy
    location / {
        proxy_pass http://karate_backend;
        proxy_http_version 1.1;

        # WebSocket & connection upgrade headers
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # Standard Proxy Headers
        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 $host;
        proxy_set_header X-Forwarded-Port $server_port;

        # AI Generation Timeouts
        proxy_connect_timeout 60s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;

        # Disable buffering for instant streaming / server-sent events
        proxy_buffering off;
    }
}