<?php

declare(strict_types=1);

require_once dirname(__DIR__, 3) . '/src/App/bootstrap.php';
require_once dirname(__DIR__) . '/bootstrap.php';

use ModulesCore\ModuleHttp;

session_start();

$projectRoot = dirname(__DIR__, 3);
ModuleHttp::requireDesktopAccess($projectRoot);
$isPartial = !empty($_GET['partial']);

$view = trim((string) ($_GET['view'] ?? 'dashboard'));
$allowedViews = ['dashboard', 'lists', 'queries', 'instances', 'setup'];
if (!in_array($view, $allowedViews, true)) {
    $view = 'dashboard';
}

$viewMeta = [
    'dashboard' => [
        'label' => 'Dashboard',
        'title' => 'Pi-hole Dashboard',
        'description' => 'Status, Blockings, Usage und direkte Steuerung fuer alle angebundenen Instanzen.',
        'nav_description' => 'Live-Status, Sperren und aggregierte DNS-Zahlen.',
    ],
    'lists' => [
        'label' => 'Listen',
        'title' => 'Listen & Domains',
        'description' => 'Gravity-Updates, Top-Domains und neue Listen-/Domain-Eintraege.',
        'nav_description' => 'Blocklisten, Whitelist und Adlist-Pflege.',
    ],
    'queries' => [
        'label' => 'Queries',
        'title' => 'Zugriffe & Blockings',
        'description' => 'Aktuelle Blockings und Top-Clients ueber alle Instanzen.',
        'nav_description' => 'Abfragen, blockierte Domains und Client-Nutzung.',
    ],
    'instances' => [
        'label' => 'Instanzen',
        'title' => 'Pi-hole Instanzen',
        'description' => 'Hosts, Zugangsdaten und Primaer-Instanz administrieren.',
        'nav_description' => 'Instanzen anlegen, testen, bearbeiten und loeschen.',
    ],
    'setup' => [
        'label' => 'Setup',
        'title' => 'Setup',
        'description' => 'Timeouts, API-Pfad und globale Pi-hole-Moduloptionen verwalten.',
        'nav_description' => 'Standard-Timeouts, TLS und Refresh-Regeln.',
    ],
];

$assetVersion = static function (string $relativePath): string {
    $fullPath = dirname(__DIR__) . '/' . ltrim($relativePath, '/');
    $mtime = is_file($fullPath) ? filemtime($fullPath) : false;

    return $mtime === false ? '0' : (string) $mtime;
};

$renderSetup = static function (): void {
    $moduleName = 'pihole';
    $manifestPath = dirname(__DIR__) . '/module.json';
    $manifestRaw = is_file($manifestPath) ? file_get_contents($manifestPath) : false;
    $manifest = is_string($manifestRaw) && trim($manifestRaw) !== '' ? json_decode($manifestRaw, true) : [];
    $fields = is_array($manifest['setup']['fields'] ?? null) ? $manifest['setup']['fields'] : [];
    $settings = modules()->settings($moduleName);
    $notice = null;
    $error = null;

    $getValue = static function (array $source, string $path): mixed {
        $value = $source;
        foreach (explode('.', $path) as $segment) {
            if (!is_array($value) || !array_key_exists($segment, $value)) {
                return null;
            }
            $value = $value[$segment];
        }

        return $value;
    };

    $setValue = static function (array &$target, string $path, mixed $value): void {
        $segments = explode('.', $path);
        $cursor = &$target;
        foreach ($segments as $index => $segment) {
            if ($index === count($segments) - 1) {
                $cursor[$segment] = $value;
                return;
            }
            if (!isset($cursor[$segment]) || !is_array($cursor[$segment])) {
                $cursor[$segment] = [];
            }
            $cursor = &$cursor[$segment];
        }
    };

    if ($_SERVER['REQUEST_METHOD'] === 'POST' && (string) ($_POST['action'] ?? '') === 'save_setup') {
        try {
            $nextSettings = $settings;
            foreach ($fields as $field) {
                if (!is_array($field)) {
                    continue;
                }
                $name = trim((string) ($field['name'] ?? ''));
                $type = trim((string) ($field['type'] ?? 'text'));
                if ($name === '') {
                    continue;
                }
                $raw = $_POST['settings'][$name] ?? null;
                $value = match ($type) {
                    'checkbox' => $raw !== null,
                    'number' => ($raw === null || $raw === '') ? null : (is_numeric((string) $raw) ? 0 + $raw : null),
                    default => is_string($raw) ? trim($raw) : '',
                };
                $setValue($nextSettings, $name, $value);
            }
            modules()->saveSettings($moduleName, $nextSettings);
            $settings = modules()->settings($moduleName);
            $notice = 'Setup gespeichert.';
        } catch (\Throwable $e) {
            $error = $e->getMessage();
        }
    }
    ?>
    <div class="pihole-content">
        <?php if ($error): ?>
            <section class="window-app-card"><div class="pihole-message pihole-message--error"><?= e($error) ?></div></section>
        <?php elseif ($notice): ?>
            <section class="window-app-card"><div class="pihole-message pihole-message--success"><?= e($notice) ?></div></section>
        <?php endif; ?>
        <section class="window-app-card">
            <div class="pihole-section-header">
                <div>
                    <h3 class="pihole-section-title">Modul-Setup</h3>
                    <p class="window-app-copy">Bestehende Nexus-Einstellungen werden uebernommen. Aenderungen werden lokal als Override gespeichert.</p>
                </div>
            </div>
            <form method="post" class="pihole-setup-form">
                <input type="hidden" name="action" value="save_setup">
                <div class="pihole-setup-grid">
                    <?php foreach ($fields as $field): ?>
                        <?php
                        if (!is_array($field)) {
                            continue;
                        }
                        $name = trim((string) ($field['name'] ?? ''));
                        $label = trim((string) ($field['label'] ?? $name));
                        $type = trim((string) ($field['type'] ?? 'text'));
                        $help = trim((string) ($field['help'] ?? ''));
                        $value = $getValue($settings, $name);
                        ?>
                        <label class="pihole-field">
                            <span><?= e($label) ?></span>
                            <?php if ($type === 'checkbox'): ?>
                                <input type="checkbox" name="settings[<?= e($name) ?>]" value="1" <?= !empty($value) ? 'checked' : '' ?>>
                            <?php elseif ($type === 'number'): ?>
                                <input type="number" step="any" name="settings[<?= e($name) ?>]" value="<?= e(is_scalar($value) ? (string) $value : '') ?>">
                            <?php else: ?>
                                <input type="<?= $type === 'password' ? 'password' : 'text' ?>" name="settings[<?= e($name) ?>]" value="<?= e(is_scalar($value) ? (string) $value : '') ?>">
                            <?php endif; ?>
                            <?php if ($help !== ''): ?>
                                <small class="window-app-meta"><?= e($help) ?></small>
                            <?php endif; ?>
                        </label>
                    <?php endforeach; ?>
                </div>
                <div class="pihole-actions">
                    <button class="window-app-nav-button pihole-primary-action" type="submit">Setup speichern</button>
                </div>
            </form>
        </section>
    </div>
    <?php
};

$renderContent = static function () use ($view, $renderSetup, $viewMeta): void {
    $currentViewMeta = $viewMeta[$view] ?? $viewMeta['dashboard'];
    $navItems = [
        'dashboard' => '/apps/pihole/index.php?view=dashboard',
        'lists' => '/apps/pihole/index.php?view=lists',
        'queries' => '/apps/pihole/index.php?view=queries',
        'instances' => '/apps/pihole/index.php?view=instances',
        'setup' => '/apps/pihole/index.php?view=setup',
    ];

    ob_start();
    if ($view === 'setup') {
        $renderSetup();
    } else {
        require dirname(__DIR__) . '/partials/' . $view . '.php';
    }
    $innerContent = (string) ob_get_clean();
    ?>
    <div class="pihole-module-shell window-app-shell">
        <div class="window-app-frame pihole-frame">
            <aside class="window-app-sidebar pihole-sidebar">
                <div class="window-app-brand pihole-brand">
                    <p class="window-app-kicker">Modul</p>
                    <h1>Pi-hole</h1>
                    <p class="window-app-copy">Pi-hole Monitoring, Listen und Steuerung fuer mehrere Instanzen im Desktop-Standardlayout.</p>
                </div>
                <div class="window-app-nav-list pihole-nav-list">
                    <?php foreach ($navItems as $navView => $href): ?>
                        <?php $meta = $viewMeta[$navView] ?? null; ?>
                        <?php if (!$meta): continue; endif; ?>
                        <a class="window-app-nav-button pihole-nav-button<?= $view === $navView ? ' is-active' : '' ?>" href="<?= e($href) ?>">
                            <strong><?= e((string) $meta['label']) ?></strong>
                            <span class="window-app-meta"><?= e((string) $meta['nav_description']) ?></span>
                        </a>
                    <?php endforeach; ?>
                </div>
            </aside>
            <main class="window-app-main pihole-main">
                <div class="window-app-panel pihole-panel-shell">
                    <section class="window-app-hero pihole-hero">
                        <div>
                            <p class="window-app-kicker">Pi-hole</p>
                            <h2 class="window-app-title"><?= e((string) $currentViewMeta['title']) ?></h2>
                            <p class="window-app-copy"><?= e((string) $currentViewMeta['description']) ?></p>
                        </div>
                        <div class="window-app-pill-row pihole-pill-row">
                            <span class="window-app-pill">Desktop-App</span>
                            <span class="window-app-pill">Netzwerk-Tools</span>
                            <span class="window-app-pill">View: <?= e((string) $currentViewMeta['label']) ?></span>
                        </div>
                    </section>
                    <?= $innerContent ?>
                </div>
            </main>
        </div>
    </div>
    <?php
};

ob_start();
$renderContent();
$pageContent = (string) ob_get_clean();

if ($isPartial) {
    echo $pageContent;
    return;
}
?><!DOCTYPE html>
<html lang="de">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Pi-hole</title>
    <link rel="stylesheet" href="/assets/desktop/desktop.css">
    <link rel="stylesheet" href="/module-assets/index.php?module=pihole&amp;path=assets/pihole.css&amp;v=<?= htmlspecialchars($assetVersion('assets/pihole.css'), ENT_QUOTES) ?>">
</head>
<body>
    <?= $pageContent ?>

    <script src="/module-assets/index.php?module=pihole&amp;path=assets/pihole.js&amp;v=<?= htmlspecialchars($assetVersion('assets/pihole.js'), ENT_QUOTES) ?>"></script>
    <script src="/module-assets/index.php?module=pihole&amp;path=assets/pihole_instances.js&amp;v=<?= htmlspecialchars($assetVersion('assets/pihole_instances.js'), ENT_QUOTES) ?>"></script>
</body>
</html>