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#!/usr/bin/env perl
# Example Rexfile for Rex::GPU + Rex::Rancher deployment
#
# Usage:
#   rex -f eg/Rexfile -H <host> detect
#   rex -f eg/Rexfile -H <host> setup
#   rex -f eg/Rexfile -H <host> setup --runtime=k3s
#   rex -f eg/Rexfile -H <host> node --hostname=worker-01 --domain=k8s.example.com
#   rex -f eg/Rexfile -H <host> server --token=mysecret --tls_san=10.0.0.1
#   rex -f eg/Rexfile -H <host> agent  --token=mysecret --server=https://10.0.0.1:6443
#
# SSH key: defaults to ~/.ssh/id_ed25519, override with REX_KEY env var
# SSH user: defaults to root, override with REX_USER env var

use Rex -feature => ['1.4'];
use Rex::LibSSH;
use Rex::GPU;
use Rex::Rancher::Agent;
use Rex::Rancher::Node;
use Rex::Rancher::Server;
use Rex::Rancher::Cilium;

my $key  = $ENV{REX_KEY}  || "$ENV{HOME}/.ssh/id_ed25519";
my $user = $ENV{REX_USER} || 'root';

set connection  => 'LibSSH';
set user        => $user;
set private_key => $key;
set public_key  => "$key.pub";
set auth        => 'key';

desc 'Detect GPUs on the host';
task 'detect', sub {
    my $gpus = Rex::GPU::gpu_detect();

    if (@{ $gpus->{nvidia} // [] }) {
        for my $gpu (@{ $gpus->{nvidia} }) {
            Rex::Logger::info("NVIDIA: $gpu->{name}" . ($gpu->{compute} ? " (compute)" : ""));
        }
    }
    else {
        Rex::Logger::info("No NVIDIA GPUs detected");
    }

    if (@{ $gpus->{amd} // [] }) {
        for my $gpu (@{ $gpus->{amd} }) {
            Rex::Logger::info("AMD: $gpu->{name}");
        }
    }
};

desc 'Detect and install NVIDIA drivers + container toolkit';
task 'setup', sub {
    my ($params) = @_;
    Rex::GPU::gpu_setup(
        containerd_config => ($params->{runtime} // 'rke2'),
        reboot            => ($params->{reboot}  // 0),
    );
};

desc 'Prepare a Linux node for Kubernetes';
task 'node', sub {
    my ($params) = @_;
    my %opts = (timezone => $params->{timezone} // 'UTC');
    $opts{hostname} = $params->{hostname} if $params->{hostname};
    $opts{domain}   = $params->{domain}   if $params->{domain};
    Rex::Rancher::Node::prepare_node(%opts);
};

desc 'Full server deploy: prepare_node + install_server + Cilium';
task 'server', sub {
    my ($params) = @_;
    my $distribution = $params->{distribution} // 'rke2';
    die "token= required\n" unless $params->{token};

    my %opts = (
        distribution => $distribution,
        token        => $params->{token},
    );
    $opts{tls_san}          = $params->{tls_san}          if $params->{tls_san};
    $opts{hostname}         = $params->{hostname}         if $params->{hostname};
    $opts{domain}           = $params->{domain}           if $params->{domain};
    $opts{kubeconfig_file}  = $params->{kubeconfig_file}  if $params->{kubeconfig_file};
    $opts{gpu}              = $params->{gpu}              if $params->{gpu};
    $opts{reboot}           = $params->{reboot}           if $params->{reboot};

    Rex::Rancher::Node::prepare_node(%opts);
    Rex::Rancher::Server::install_server(%opts);