upstream backend {
    server backend:3000;
}

upstream frontend {
    server frontend:3000;
}

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

server {
    listen 80;
    server_name imphnen.asepharyana.my.id;

    # API proxy — matches /api and /api/*
    location ^~ /api {
        proxy_pass http://backend;
        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;
    }

    # WebSocket proxy — matches /ws and /ws/*
    location ^~ /ws {
        proxy_pass http://backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade              $http_upgrade;
        proxy_set_header Connection           $connection_upgrade;
        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;

        # WebSocket-specific: no buffering, longer timeouts
        proxy_buffering off;
        proxy_read_timeout 86400s;
        proxy_send_timeout 86400s;
    }

    # Frontend SPA fallback
    location / {
        proxy_pass http://frontend;
        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;
    }
}