#!/usr/bin/perl -w

#
# EMULAB-COPYRIGHT
# Copyright (c) 2000-2003 University of Utah and the Flux Group.
# All rights reserved.
#

#
# avail - prints a list of all available nodes
#

#
# Configure variables
#
use lib '@prefix@/lib';
use libdb;

my $d = 0; #debug mode

if ($#ARGV >= 0 && $ARGV[0] =~ /^-?h/i ) { 
  die("Usage:\navail [help] [type[=<type>]] [OS[=<OS>]] [ver[=<OS_ver>]]\n".
      "              [[includevirt] or [virtonly[=<phys>]]] [rand] [limit=N]".
      "\n".
      "\n".
      "type \t= pc | shark\n"."OS \t= Linux | FreeBSD | NetBSD | ...\n".
      "ver \t= 6.2 | 3.4 | 4.0 | 5.2 | ...\n".#"deltas \t= anetd | ...\n".
      "includevirt: Include virtual nodes\n".
      "rand: Randomize result order\n".
      "limit: Limit count to N nodes\n".
      "A field name alone will show that field in the display of available\n".
      "nodes. A field name with '=' followed by a string will match nodes\n".
      "that have that string in that field.\n"
     );
}

print "Got ARGS = ",join(" ",@ARGV),"\n" if $d;

my %args = ();
while ($#ARGV >= 0) {
  $_ = shift;
  if ( ! /=/ ) { $args{"\L$_"}='='; } else {
    @_ = split('=',$_);
    my ($opt,$val) = @_ if ($#_ >= 0);
    if (!defined($val)) { $val=""; }
    $args{"\L$opt"}=$val if (defined($opt));
  }
}
if ( $d ) {
  print "Parsed args to:\n";
  foreach my $opt (keys %args) {
    print "$opt:\t$args{$opt}\n";
  }
}

my $join= "nodes as a left join reserved as b on a.node_id=b.node_id".
  " left join node_types as nt on a.type=nt.type";
my $cols= "a.node_id,a.type,nt.class";
my $cond= "b.node_id is null ";

if ($args{"virtonly"}) {
    $cond .= " and ( a.role='virtnode' ";

    if ($args{"virtonly"} ne '=') {
	$cond .= " and a.phys_nodeid='" . $args{"virtonly"} . "' ";
    }
    $cond .= " ) ";
}
else {
    $cond .= " and ( a.role='testnode' ";

    if ($args{"includevirt"}) {
	$cond .= " or a.role='virtnode' ";
    }
    $cond .= " ) ";
}

if ($args{"rand"}) {
    $order  = "rand()";
} else {
    $order = "priority";
}

if ($args{"limit"}) {
    $limit = "limit " . $args{"limit"};
} else {
    $limit = "";
}

my $os = 0;
my $delta = 0;

if (defined($args{"type"})) {
  # Make it a like, so if they type 'pc' they get pc850 and pc600...
  $cond .= " and (a.type='".$args{"type"}."' or nt.class='".$args{"type"}."')" 
    if $args{"type"} ne '=';
}
if (defined($args{"os"})) { 
  $os = 1;
  $cols .= ",d.OS";
  $cond .= " and d.OS='".$args{"os"}."'" if $args{"os"} ne '='; 
}
if (defined($args{"ver"})) { 
  $os = 1;
  $cols .= ",d.version";
  $cond .= " and d.version='".$args{"ver"}."'" if $args{"ver"} ne '='; 
}
# if (defined($args{"deltas"})) { 
#   $os = 1;
#   $delta=1;
#   $cols .= ",e.delta_id";
#   $cond .= " and e.delta_id='".$args{"deltas"}."'" if $args{"deltas"} ne '='; 
# }

if ($os) {
  $join .= " left join partitions as c on a.node_id=c.node_id";
  $join .= " left join os_info as d on c.osid=d.osid";
}

# if ($delta) {
#   $join .= " left join delta_inst as e on c.node_id=e.node_id ".
#     "and c.partition=e.partition";
# }


my $cmd = "select $cols from $join where $cond order by $order $limit";

print "Sending cmd:\n$cmd\n" if $d;

my $result = DBQueryFatal($cmd);

print $result->as_string();

# Hacky. Batch daemon depends on this exit code.
exit($result->numrows);