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

server {
    listen 80;
    server_name appwrite.lostcausenetwork.com;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl http2;
    server_name appwrite.lostcausenetwork.com;

    ssl_certificate /etc/letsencrypt/live/appwrite.lostcausenetwork.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/appwrite.lostcausenetwork.com/privkey.pem;
    ssl_session_cache shared:SSL:10m;
    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 on;

    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Robots-Tag none;
    add_header Content-Security-Policy "frame-ancestors 'self'";
    add_header X-Frame-Options DENY;
    add_header Referrer-Policy same-origin;

    location ^~ /.well-known/acme-challenge/ {
        root /var/www/letsencrypt;
        try_files $uri =404;
    }

    client_max_body_size 100m;
    client_body_timeout 120s;

    location / {
        # Proxy to Appwrite TLS backend
        proxy_pass https://127.0.0.1:3443;

        # Ensure Appwrite sees public host/proto
        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 https;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port 443;
        proxy_set_header X-Forwarded-Scheme https;
        proxy_set_header Origin $http_origin;

        # Websockets / upgrades
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;

        # SSL for upstream (internal Appwrite uses TLS)
        proxy_ssl_server_name on;
        proxy_ssl_name appwrite.lostcausenetwork.com;
        proxy_ssl_verify off;

        # Prevent nginx changing redirects/cookies coming from Appwrite
        proxy_redirect off;
        proxy_cookie_domain 127.0.0.1 appwrite.lostcausenetwork.com;
        proxy_cookie_path / /;

        proxy_buffering off;
        proxy_request_buffering off;
        proxy_read_timeout 86400;
        proxy_send_timeout 600;
    }
}