# Increase buffer size for large headers from Authentik
proxy_buffers 8 16k;
proxy_buffer_size 32k;

# Exclude static assets from forward auth
# These paths bypass auth_request but still proxy to upstream
location ~ ^/(manifest\.json|favicon\.(ico|png)|health|icons|assets) {
    auth_request off;
    proxy_pass $forward_scheme://$server:$port;
}

# Forward authentication via standalone outpost
auth_request /outpost.goauthentik.io/auth/nginx;
error_page 401 = @goauthentik_proxy_signin;

# Capture auth response headers
auth_request_set $auth_cookie $upstream_http_set_cookie;
auth_request_set $authentik_username $upstream_http_x_authentik_username;
auth_request_set $authentik_groups $upstream_http_x_authentik_groups;
auth_request_set $authentik_email $upstream_http_x_authentik_email;
auth_request_set $authentik_name $upstream_http_x_authentik_name;
auth_request_set $authentik_uid $upstream_http_x_authentik_uid;

# Forward auth headers to application
add_header Set-Cookie $auth_cookie;
proxy_set_header X-authentik-username $authentik_username;
proxy_set_header X-authentik-groups $authentik_groups;
proxy_set_header X-authentik-email $authentik_email;
proxy_set_header X-authentik-name $authentik_name;
proxy_set_header X-authentik-uid $authentik_uid;

# Outpost proxy location
location /outpost.goauthentik.io {
    proxy_pass https://localhost:9444/outpost.goauthentik.io;
    proxy_set_header Host $host;
    proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-Host $http_host;
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_pass_request_body off;
    proxy_set_header Content-Length "";

    # WebSocket support
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;
}

# Signin redirect handler
location @goauthentik_proxy_signin {
    internal;
    return 302 /outpost.goauthentik.io/start?rd=$request_uri;
}