<?php

$file = $argv[1] ?? '/var/www/epg/guide.xml';

if (!file_exists($file)) {
    fwrite(STDERR, "Datei nicht gefunden: {$file}\n");
    exit(1);
}

$xml = simplexml_load_file($file);

if (!$xml) {
    fwrite(STDERR, "XML konnte nicht gelesen werden.\n");
    exit(1);
}

$tagCounts = [];
$programmeTagCounts = [];
$attributeCounts = [];
$samples = [];

function countNode(SimpleXMLElement $node, string $path): void
{
    global $tagCounts, $attributeCounts, $samples;

    $name = $node->getName();
    $fullPath = $path === '' ? $name : $path . '/' . $name;

    $tagCounts[$fullPath] = ($tagCounts[$fullPath] ?? 0) + 1;

    $text = trim((string)$node);
    if ($text !== '' && !isset($samples[$fullPath])) {
        $samples[$fullPath] = mb_substr($text, 0, 120);
    }

    foreach ($node->attributes() as $attrName => $attrValue) {
        $attrPath = $fullPath . '[@' . $attrName . ']';
        $attributeCounts[$attrPath] = ($attributeCounts[$attrPath] ?? 0) + 1;

        $value = trim((string)$attrValue);
        if ($value !== '' && !isset($samples[$attrPath])) {
            $samples[$attrPath] = mb_substr($value, 0, 120);
        }
    }

    foreach ($node->children() as $child) {
        countNode($child, $fullPath);
    }
}

foreach ($xml->children() as $child) {
    countNode($child, '');
}

foreach ($xml->programme as $programme) {
    foreach ($programme->children() as $child) {
        $name = $child->getName();
        $programmeTagCounts[$name] = ($programmeTagCounts[$name] ?? 0) + 1;
    }
}

ksort($tagCounts);
ksort($attributeCounts);
arsort($programmeTagCounts);

echo "XMLTV Analyse\n";
echo "=============\n\n";
echo "Datei: {$file}\n";
echo "Channels: " . count($xml->channel) . "\n";
echo "Programme: " . count($xml->programme) . "\n\n";

echo "Programme-Tags nach Häufigkeit\n";
echo "------------------------------\n";

foreach ($programmeTagCounts as $tag => $count) {
    echo str_pad($tag, 24) . $count . "\n";
}

echo "\nAlle Tags\n";
echo "--------\n";

foreach ($tagCounts as $path => $count) {
    $sample = isset($samples[$path]) ? '  Beispiel: ' . $samples[$path] : '';
    echo str_pad($path, 45) . str_pad((string)$count, 8, ' ', STR_PAD_LEFT) . $sample . "\n";
}

echo "\nAttribute\n";
echo "---------\n";

foreach ($attributeCounts as $path => $count) {
    $sample = isset($samples[$path]) ? '  Beispiel: ' . $samples[$path] : '';
    echo str_pad($path, 45) . str_pad((string)$count, 8, ' ', STR_PAD_LEFT) . $sample . "\n";
}