<?php

/**
 * Logs plugin: toont admin- en request-logs in het beheer.
 *
 * Systeem-plugin die logbestanden uitleest en in een tabel toont,
 * met tabbladen voor admin-logs en request-logs.
 *
 * @since 2.6.4
 */
class Logs
{
    /**
     * Plugin-API instantie voor communicatie met de CMS-core.
     *
     * @since 2.6.4
     * @var PluginAPIInterface|null
     */
    private ?PluginAPIInterface $api = null;

    /**
     * Stelt de Plugin-API instantie in.
     *
     * @since 2.6.4
     * @param PluginAPIInterface $api De Plugin-API instantie.
     * @return void
     */
    public function setAPI(PluginAPIInterface $api): void
    {
        $this->api = $api;
    }

    /**
     * Geeft de plugin-configuratie terug.
     *
     * @since 2.6.4
     * @return array<string, mixed> Plugin-configuratie met title, viewable en type.
     */
    public function getConfig(): array
    {
        return [
            'title' => 'Logs',
            'viewable' => false,
            'type' => 'system',
        ];
    }

    /**
     * Geeft de admin-menu-items voor deze plugin terug.
     *
     * @since 2.6.4
     * @return array<int, array<string, mixed>> Lijst met admin-menu-item configuraties.
     */
    public function getAdminMenu(): array
    {
        $config = $this->getPluginConfig();
        $requiredRoles = $config['required_roles'] ?? ['bi-manager', 'site-admin', 'admin'];

        return [
            [
                'plugin' => 'Logs',
                'route' => 'logs',
                'label' => 'Logs',
                'label_key' => 'menu_label',
                'icon' => 'bi-journal-text',
                'section' => 'general',
                'permission' => 'logs',
                'required_roles' => $requiredRoles,
            ],
        ];
    }

    /**
     * Haalt de runtime-configuratie van deze plugin op (standaardwaarden plus overrides).
     *
     * Leest standaardwaarden uit plugin.json en overschrijft deze met config.json.
     *
     * @since 2.6.4
     * @return array<string, mixed> De samengevoegde plugin-configuratie.
     */
    private function getPluginConfig(): array
    {
        $pluginDir = dirname(__DIR__);
        $pluginJsonFile = $pluginDir . '/plugin.json';
        $configJsonFile = $pluginDir . '/config.json';

        $defaults = [];
        if (file_exists($pluginJsonFile)) {
            $pluginJson = json_decode(file_get_contents($pluginJsonFile), true) ?? [];
            foreach ($pluginJson['settings'] ?? [] as $setting) {
                if (isset($setting['key'])) {
                    $defaults[$setting['key']] = $setting['default'] ?? null;
                }
            }
        }

        $overrides = [];
        if (file_exists($configJsonFile)) {
            $overrides = json_decode(file_get_contents($configJsonFile), true) ?? [];
        }

        return array_merge($defaults, $overrides);
    }

    /**
     * Verwerkt een admin-route en toont de logs-pagina.
     *
     * Leest de geselecteerde log, parset de regels en toont deze in een tabel
     * met tabbladen voor admin- en request-logs.
     *
     * @since 2.6.4
     * @param string $action De uit te voeren actie.
     * @return string|null De HTML-uitvoer van de logs-pagina, of null.
     */
    public function handleAdminRoute(string $action): ?string
    {
        $config = $this->getPluginConfig();
        $maxLines = (int)($config['max_lines'] ?? 100);
        $showAdminTab = $config['show_admin_tab'] ?? true;
        $showRequestsTab = $config['show_requests_tab'] ?? true;

        // System plugin: translations resolve against the admin language.
        $t = $this->api ? $this->api->getPluginTranslations('Logs') : [];
        $tr = function (string $key) use ($t): string {
            return $t[$key] ?? $key;
        };

        $tab = $_GET['tab'] ?? 'admin';
        $logDir = ($this->api ? $this->api->getProjectRoot() : dirname(__DIR__, 2)) . '/admin/storage/logs';
        $logFile = $tab === 'requests' ? $logDir . '/requests.log' : $logDir . '/admin.log';

        $logs = [];
        if (file_exists($logFile)) {
            $lines = file($logFile) ?: [];
            $lines = array_slice($lines, -$maxLines);
            foreach ($lines as $line) {
                if (preg_match('/^\[([^\]]+)\] \[([^\]]+)\] \[([^\]]+)\] (.+)$/', trim($line), $m)) {
                    $logs[] = [
                        'time' => $m[1],
                        'level' => strtolower($m[2]),
                        'ip' => $m[3],
                        'message' => $m[4],
                    ];
                }
            }
            $logs = array_reverse($logs);
        }

        ob_start();
        ?>
        <h2 class="mb-4"><i class="bi bi-journal-text"></i> <?= htmlspecialchars($tr('page_title')) ?></h2>

        <?php if ($showAdminTab || $showRequestsTab): ?>
        <ul class="nav nav-tabs mb-3">
            <?php if ($showAdminTab): ?>
            <li class="nav-item">
                <a class="nav-link <?= $tab === 'admin' ? 'active' : '' ?>" href="/admin/logs?tab=admin"><?= htmlspecialchars($tr('tab_admin')) ?></a>
            </li>
            <?php endif; ?>
            <?php if ($showRequestsTab): ?>
            <li class="nav-item">
                <a class="nav-link <?= $tab === 'requests' ? 'active' : '' ?>" href="/admin/logs?tab=requests"><?= htmlspecialchars($tr('tab_requests')) ?></a>
            </li>
            <?php endif; ?>
        </ul>
        <?php endif; ?>

        <div class="card shadow-sm">
            <div class="card-body p-0">
                <table class="table table-hover mb-0">
                    <thead>
                        <tr>
                            <th><?= htmlspecialchars($tr('col_time')) ?></th>
                            <th><?= htmlspecialchars($tr('col_level')) ?></th>
                            <th><?= htmlspecialchars($tr('col_ip')) ?></th>
                            <th><?= htmlspecialchars($tr('col_message')) ?></th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php if (empty($logs)): ?>
                        <tr><td colspan="4" class="text-muted text-center py-4"><?= htmlspecialchars($tr('no_logs')) ?></td></tr>
                        <?php else: ?>
                            <?php foreach ($logs as $log): ?>
                            <tr>
                                <td class="text-muted small"><?= htmlspecialchars($log['time']) ?></td>
                                <td><span class="badge bg-<?= $log['level'] === 'warning' ? 'warning text-dark' : ($log['level'] === 'error' ? 'danger' : 'info') ?>"><?= htmlspecialchars($log['level']) ?></span></td>
                                <td><code class="text-muted"><?= htmlspecialchars($log['ip']) ?></code></td>
                                <td><?= htmlspecialchars($log['message']) ?></td>
                            </tr>
                            <?php endforeach; ?>
                        <?php endif; ?>
                    </tbody>
                </table>
            </div>
        </div>
        <?php
        return ob_get_clean();
    }
}