#!/usr/bin/perl

$num = 0;
$override_range = $ARGV[0];

# Go through the .csc file; find the transmission range and all the
# nodes' x and y coordinates.
while(<STDIN>) {
    if(/\<transmitting_range\>([\d.]+)\<\//) {
        $range = $1;
    }

    if(/\<x\>([\d.]+)\</) {
        $x[$num] = $1;
    }
    if(/\<y\>([\d.]+)\</) {
        $y[$num] = $1;
        $num++;
    }
}
print "Range $range num $num override range $override_range\n";

if($override_range) {
    $range = $override_range;
}

$no_neighbors = 0;
$all_neighbors = 0;
$total_neighbors = 0;
# Go through all nodes, find how many are in their range.
for($i = 0; $i < $num; $i++) {
    $neighbors = 0;
    for($j = 0; $j < $num; $j++) {
        if($i != $j) {
            if(($x[$i] - $x[$j]) * ($x[$i] - $x[$j]) +
               ($y[$i] - $y[$j]) * ($y[$i] - $y[$j]) <=
               $range * $range) {
                $neighbors++;
            }
        }
    }
    if($neighbors == 0) {
        $no_neighbors++;
    }
    if($neighbors == $num - 1) {
        $all_neighbors++;
    }
    $total_neighbors += $neighbors;
}
print "Num nodes $num, average neighbors " . ($total_neighbors / $num) .
    ", $no_neighbors nodes (" . (100 * $no_neighbors / $num) .
    "%) have no neighbors, $all_neighbors (" . (100 * $all_neighbors / $num) .
    "%) have all nodes as neighbors\n";