<?php
require_once __DIR__ . '/src/lib/admin.php';

$config = gridtv_load_config();
gridtv_require_admin($config, 'Health');
[$locale, $L] = gridtv_load_locale($config);

function health_status_class(bool $ok): string {
    return $ok ? 'ok' : 'ko';
}

function health_status_label(bool $ok): string {
    return $ok ? 'OK' : 'Issue';
}

function health_parse_xmltv(string $xml): array {
    if ($xml === '') {
        return ['ok' => false, 'error' => 'Empty response'];
    }

    libxml_use_internal_errors(true);
    $dom = new DOMDocument();
    $loaded = $dom->loadXML($xml, LIBXML_NOERROR | LIBXML_NOWARNING);
    $errors = array_map(static fn($e) => trim($e->message), libxml_get_errors());
    libxml_clear_errors();

    if (!$loaded) {
        return ['ok' => false, 'error' => $errors[0] ?? 'Invalid XML'];
    }

    $xp = new DOMXPath($dom);
    $programmes = $xp->query('/tv/programme');
    $channels = $xp->query('/tv/channel');
    $categories = $xp->query('/tv/programme/category');
    $subtitles = $xp->query('/tv/programme/sub-title');
    $ratings = $xp->query('/tv/programme/rating');
    $dates = $xp->query('/tv/programme/date');

    $first = null;
    $last = null;
    foreach ($programmes as $programme) {
        $start = $programme->getAttribute('start');
        $stop = $programme->getAttribute('stop');
        if ($start !== '' && ($first === null || strcmp($start, $first) < 0)) $first = $start;
        if ($stop !== '' && ($last === null || strcmp($stop, $last) > 0)) $last = $stop;
    }

    return [
        'ok' => true,
        'channels' => $channels->length,
        'programmes' => $programmes->length,
        'categories' => $categories->length,
        'subtitles' => $subtitles->length,
        'ratings' => $ratings->length,
        'dates' => $dates->length,
        'first_start' => $first,
        'last_stop' => $last,
    ];
}

function health_parse_m3u(string $body): array {
    $lines = preg_split('/\r\n|\r|\n/', $body);
    $streams = 0;
    $extinf = 0;
    foreach ($lines as $line) {
        $line = trim($line);
        if ($line === '') continue;
        if (stripos($line, '#EXTINF') === 0) {
            $extinf++;
            continue;
        }
        if ($line[0] !== '#') $streams++;
    }
    return ['streams' => $streams, 'extinf' => $extinf];
}

function health_format_xmltv_stamp(?string $stamp): string {
    if (!$stamp) return '—';
    $dt = DateTime::createFromFormat('YmdHis O', $stamp);
    if (!$dt) return $stamp;
    return $dt->format('d/m/Y H:i');
}

$config_path = gridtv_config_path();
$config_exists = file_exists($config_path);
$config_writable = $config_exists ? is_writable($config_path) : is_writable(dirname($config_path));
$sources = array_values($config['epg_sources'] ?? []);

$checks = [
    [
        'label' => 'Config file',
        'ok' => $config_exists,
        'detail' => $config_exists ? basename($config_path) . ' found' : 'Missing config.json',
    ],
    [
        'label' => 'Config writable',
        'ok' => $config_writable,
        'detail' => $config_writable ? 'Writable by PHP' : 'Not writable by PHP',
    ],
    [
        'label' => 'PHP version',
        'ok' => version_compare(PHP_VERSION, '8.0.0', '>='),
        'detail' => 'PHP ' . PHP_VERSION,
    ],
    [
        'label' => 'php-curl',
        'ok' => extension_loaded('curl'),
        'detail' => extension_loaded('curl') ? 'Extension loaded' : 'Missing php-curl',
    ],
    [
        'label' => 'Configured sources',
        'ok' => count($sources) > 0,
        'detail' => count($sources) . ' source(s) in config',
    ],
];

$source_reports = [];
foreach ($sources as $index => $source) {
    $epg_url = trim((string) ($source['epg_url'] ?? ''));
    $m3u_url = trim((string) ($source['m3u_url'] ?? ''));

    $epg_fetch = $epg_url !== '' ? gridtv_fetch_url($epg_url, 25) : ['ok' => false, 'status' => 0, 'error' => 'Missing URL', 'body' => '', 'content_type' => '', 'final_url' => '', 'time_total' => 0.0];
    $epg_stats = $epg_fetch['ok'] ? health_parse_xmltv($epg_fetch['body']) : ['ok' => false, 'error' => $epg_fetch['error'] ?: 'HTTP ' . $epg_fetch['status']];

    $m3u_fetch = null;
    $m3u_stats = null;
    if ($m3u_url !== '') {
        $m3u_fetch = gridtv_fetch_url($m3u_url, 20);
        $m3u_stats = $m3u_fetch['ok'] ? health_parse_m3u($m3u_fetch['body']) : null;
    }

    $source_reports[] = [
        'name' => $source['name'] ?: 'Source ' . ($index + 1),
        'epg_url' => $epg_url,
        'm3u_url' => $m3u_url,
        'epg_fetch' => $epg_fetch,
        'epg_stats' => $epg_stats,
        'm3u_fetch' => $m3u_fetch,
        'm3u_stats' => $m3u_stats,
    ];
}
?><!DOCTYPE html>
<html lang="<?= htmlspecialchars($locale) ?>">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>GridTV — Health</title>
<link rel="stylesheet" href="/assets/fonts/fonts.css">
<style>
:root{--bg:#0b0d10;--surface:#13161b;--surface2:#1a1f27;--border:#2a3240;--accent:#e8c842;--accent2:#5ec0ff;--text:#eaf0f6;--muted:#8f9aac;--ok:#4fd18b;--warn:#ff6767}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top left,#1b2330 0,#0b0d10 48%);color:var(--text);font-family:'Barlow Condensed',sans-serif}
.page{max-width:1200px;margin:0 auto;padding:32px 20px 56px}
.hero{display:flex;justify-content:space-between;gap:18px;align-items:flex-end;margin-bottom:24px}
.logo{font-family:'Share Tech Mono',monospace;font-size:26px;letter-spacing:.12em;color:var(--accent);text-transform:uppercase}
.subtitle{color:var(--muted);font-size:14px;max-width:700px;line-height:1.5}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 14px;border:1px solid var(--border);background:var(--surface);color:var(--text);text-decoration:none;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.btn-primary{background:var(--accent);color:#000;border-color:var(--accent)}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-bottom:22px}
.card,.source{background:rgba(19,22,27,.95);border:1px solid var(--border)}
.card{padding:16px}
.eyebrow{font-family:'Share Tech Mono',monospace;font-size:11px;color:var(--accent2);letter-spacing:.12em;text-transform:uppercase;margin-bottom:10px}
.value{font-size:28px;font-weight:700}
.small{font-size:13px;color:var(--muted)}
.checks{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-bottom:24px}
.check{padding:14px;background:var(--surface);border:1px solid var(--border)}
.status{display:inline-flex;align-items:center;gap:8px;font-family:'Share Tech Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase}
.status::before{content:'';width:10px;height:10px;border-radius:50%}
.status.ok{color:var(--ok)}.status.ok::before{background:var(--ok)}
.status.ko{color:var(--warn)}.status.ko::before{background:var(--warn)}
.source-list{display:grid;gap:18px}
.source{padding:20px}
.source-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start;margin-bottom:16px}
.source-title{font-size:24px;font-weight:700}
.pill{display:inline-block;padding:6px 10px;font-family:'Share Tech Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;background:var(--surface2);border:1px solid var(--border);color:var(--accent2)}
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.panel{padding:16px;background:var(--surface2);border:1px solid var(--border)}
.panel h3{margin:0 0 10px;font-size:16px;letter-spacing:.06em;text-transform:uppercase}
.kv{display:grid;grid-template-columns:160px 1fr;gap:8px;font-size:14px;line-height:1.45}
.kv div:nth-child(odd){color:var(--muted)}
.mono{font-family:'Share Tech Mono',monospace;font-size:12px;word-break:break-all}
@media (max-width:700px){.hero{flex-direction:column;align-items:flex-start}.kv{grid-template-columns:1fr}}
</style>
</head>
<body>
<div class="page">
  <div class="hero">
    <div>
      <div class="logo">GridTV / Health</div>
      <div class="subtitle">Page de diagnostic admin. Elle vérifie l’état de l’instance, les flux XMLTV/M3U configurés et les signaux qui aident à comprendre vite ce qui coince.</div>
    </div>
    <div class="actions">
      <a class="btn btn-primary" href="/export.php">Export 24h</a>
      <a class="btn" href="/setup.php">Setup</a>
      <a class="btn" href="/index.php">Guide</a>
    </div>
  </div>

  <div class="grid">
    <div class="card"><div class="eyebrow">Group</div><div class="value"><?= htmlspecialchars($config['group_name'] ?? 'GridTV') ?></div><div class="small">Configured TV group name</div></div>
    <div class="card"><div class="eyebrow">Sources</div><div class="value"><?= count($sources) ?></div><div class="small">Configured XMLTV sources</div></div>
    <div class="card"><div class="eyebrow">Locale</div><div class="value"><?= strtoupper(htmlspecialchars($locale)) ?></div><div class="small">Detected UI locale</div></div>
    <div class="card"><div class="eyebrow">Config Size</div><div class="value"><?= $config_exists ? htmlspecialchars(gridtv_format_bytes(filesize($config_path))) : '0 B' ?></div><div class="small"><?= htmlspecialchars($config_path) ?></div></div>
  </div>

  <div class="checks">
<?php foreach ($checks as $check): ?>
    <div class="check">
      <div class="status <?= health_status_class($check['ok']) ?>"><?= health_status_label($check['ok']) ?></div>
      <div style="font-size:18px;font-weight:700;margin:8px 0 6px"><?= htmlspecialchars($check['label']) ?></div>
      <div class="small"><?= htmlspecialchars($check['detail']) ?></div>
    </div>
<?php endforeach; ?>
  </div>

  <div class="source-list">
<?php foreach ($source_reports as $report): ?>
    <section class="source">
      <div class="source-head">
        <div>
          <div class="source-title"><?= htmlspecialchars($report['name']) ?></div>
          <div class="small">EPG host: <?= htmlspecialchars(gridtv_extract_host($report['epg_url'])) ?: '—' ?><?= $report['m3u_url'] ? ' · M3U host: ' . htmlspecialchars(gridtv_extract_host($report['m3u_url'])) : '' ?></div>
        </div>
        <span class="pill"><?= htmlspecialchars($report['epg_fetch']['ok'] && $report['epg_stats']['ok'] ? 'Healthy XMLTV' : 'Check source') ?></span>
      </div>
      <div class="split">
        <div class="panel">
          <h3>XMLTV</h3>
          <div class="kv">
            <div>Status</div><div><span class="status <?= health_status_class($report['epg_fetch']['ok'] && $report['epg_stats']['ok']) ?>"><?= health_status_label($report['epg_fetch']['ok'] && $report['epg_stats']['ok']) ?></span></div>
            <div>URL</div><div class="mono"><?= htmlspecialchars($report['epg_url']) ?></div>
            <div>HTTP</div><div><?= htmlspecialchars((string) $report['epg_fetch']['status']) ?><?= $report['epg_fetch']['error'] ? ' · ' . htmlspecialchars($report['epg_fetch']['error']) : '' ?></div>
            <div>Response time</div><div><?= htmlspecialchars(number_format($report['epg_fetch']['time_total'], 2)) ?> s</div>
<?php if ($report['epg_fetch']['ok'] && $report['epg_stats']['ok']): ?>
            <div>Channels</div><div><?= htmlspecialchars((string) $report['epg_stats']['channels']) ?></div>
            <div>Programmes</div><div><?= htmlspecialchars((string) $report['epg_stats']['programmes']) ?></div>
            <div>Sub-titles</div><div><?= htmlspecialchars((string) $report['epg_stats']['subtitles']) ?></div>
            <div>Ratings</div><div><?= htmlspecialchars((string) $report['epg_stats']['ratings']) ?></div>
            <div>Categories</div><div><?= htmlspecialchars((string) $report['epg_stats']['categories']) ?></div>
            <div>Date tags</div><div><?= htmlspecialchars((string) $report['epg_stats']['dates']) ?></div>
            <div>Window</div><div><?= htmlspecialchars(health_format_xmltv_stamp($report['epg_stats']['first_start'])) ?> → <?= htmlspecialchars(health_format_xmltv_stamp($report['epg_stats']['last_stop'])) ?></div>
            <div>Content-Type</div><div><?= htmlspecialchars($report['epg_fetch']['content_type'] ?: '—') ?></div>
<?php else: ?>
            <div>Parse</div><div><?= htmlspecialchars($report['epg_stats']['error'] ?? 'Unable to read XMLTV') ?></div>
<?php endif; ?>
          </div>
        </div>
        <div class="panel">
          <h3>M3U</h3>
<?php if (!$report['m3u_url']): ?>
          <div class="small">No M3U URL configured for this source.</div>
<?php else: ?>
          <div class="kv">
            <div>Status</div><div><span class="status <?= health_status_class((bool) ($report['m3u_fetch']['ok'] ?? false)) ?>"><?= health_status_label((bool) ($report['m3u_fetch']['ok'] ?? false)) ?></span></div>
            <div>URL</div><div class="mono"><?= htmlspecialchars($report['m3u_url']) ?></div>
            <div>HTTP</div><div><?= htmlspecialchars((string) ($report['m3u_fetch']['status'] ?? 0)) ?><?= !empty($report['m3u_fetch']['error']) ? ' · ' . htmlspecialchars($report['m3u_fetch']['error']) : '' ?></div>
            <div>Response time</div><div><?= htmlspecialchars(number_format((float) ($report['m3u_fetch']['time_total'] ?? 0), 2)) ?> s</div>
<?php if (!empty($report['m3u_fetch']['ok']) && $report['m3u_stats']): ?>
            <div>Streams</div><div><?= htmlspecialchars((string) $report['m3u_stats']['streams']) ?></div>
            <div>#EXTINF</div><div><?= htmlspecialchars((string) $report['m3u_stats']['extinf']) ?></div>
            <div>Content-Type</div><div><?= htmlspecialchars($report['m3u_fetch']['content_type'] ?: '—') ?></div>
<?php else: ?>
            <div>Parse</div><div>Unable to load playlist.</div>
<?php endif; ?>
          </div>
<?php endif; ?>
        </div>
      </div>
    </section>
<?php endforeach; ?>
  </div>
</div>
</body>
</html>