<?php
/*
 * Plugin SIEM-Wazuh pour GLPI
 * Description: Intégration SIEM Wazuh avec GLPI
 * Version: 1.0.0
 */

define('PLUGIN_SIEM_WAZUH_VERSION', '1.0.0');
define('PLUGIN_SIEM_WAZUH_MIN_GLPI', '10.0.0');
define('PLUGIN_SIEM_WAZUH_MAX_GLPI', '10.0.99');

/**
 * Plugin init function
 */
function plugin_init_siem_wazuh() {
    global $PLUGIN_HOOKS, $CFG_GLPI;

    $PLUGIN_HOOKS['csrf_compliant']['siem-wazuh'] = true;
    
    // Enregistrement du plugin
    Plugin::registerClass('PluginSiemWazuhServer', [
        'linkgroup' => 'admin',
        'linktext'  => __('Wazuh Servers', 'siem-wazuh'),
        'icon'      => 'fas fa-shield-alt'
    ]);
    
    Plugin::registerClass('PluginSiemWazuhConfig', [
        'linkgroup' => 'tools',
        'linktext'  => __('SIEM Wazuh Configuration', 'siem-wazuh'),
        'icon'      => 'fas fa-cogs'
    ]);
    
    Plugin::registerClass('PluginSiemWazuhAlert');

    // Ajout des menus
    if (Session::haveRight('plugin_siem_wazuh_server', READ)) {
        $PLUGIN_HOOKS['menu_toadd']['siem-wazuh']['admin'] = 'PluginSiemWazuhServer';
    }
    
    if (Session::haveRight('plugin_siem_wazuh_config', READ)) {
        $PLUGIN_HOOKS['menu_toadd']['siem-wazuh']['tools'] = 'PluginSiemWazuhConfig';
    }

    // Ajout des onglets sur les éléments
    $PLUGIN_HOOKS['item_add_targets']['siem-wazuh'] = [
        'Computer'         => ['PluginSiemWazuhTab'],
        'NetworkEquipment' => ['PluginSiemWazuhTab'],
        'Peripheral'       => ['PluginSiemWazuhTab'],
        'Phone'           => ['PluginSiemWazuhTab'],
        'Printer'         => ['PluginSiemWazuhTab']
    ];

    // Hook pour l'affichage des onglets
    $PLUGIN_HOOKS['display_item']['siem-wazuh'] = 'plugin_siem_wazuh_display_item';

    // Hook pour les actions automatiques (cron)
    $PLUGIN_HOOKS['cron']['siem-wazuh'] = 1;
    
    // Hook pour les droits
    $PLUGIN_HOOKS['change_profile']['siem-wazuh'] = ['PluginSiemWazuhProfile', 'changeProfile'];
    $PLUGIN_HOOKS['init_profile']['siem-wazuh']   = ['PluginSiemWazuhProfile', 'initProfile'];

    // CSS et JS
    $PLUGIN_HOOKS['add_css']['siem-wazuh'][] = 'css/style.css';
    $PLUGIN_HOOKS['add_javascript']['siem-wazuh'][] = 'js/wazuh.js';

    // Import/Export
    $PLUGIN_HOOKS['import_item']['siem-wazuh'] = ['Computer', 'NetworkEquipment'];

    // Notification
    $PLUGIN_HOOKS['item_get_events']['siem-wazuh'] = [
        'PluginSiemWazuhAlert' => ['PluginSiemWazuhAlert', 'getEvents']
    ];
}

/**
 * Plugin version function
 */
function plugin_version_siem_wazuh() {
    return [
        'name'           => 'SIEM - Wazuh',
        'version'        => PLUGIN_SIEM_WAZUH_VERSION,
        'author'         => 'SIEM-Wazuh Team',
        'license'        => 'GPLv2+',
        'homepage'       => 'https://github.com/siem-wazuh/glpi-plugin',
        'requirements'   => [
            'glpi' => [
                'min' => PLUGIN_SIEM_WAZUH_MIN_GLPI,
                'max' => PLUGIN_SIEM_WAZUH_MAX_GLPI,
            ],
            'php' => [
                'min' => '7.4',
            ],
            'params' => [
                'check_prerequisites' => true,
            ]
        ]
    ];
}

/**
 * Check plugin prerequisites
 */
function plugin_siem_wazuh_check_prerequisites() {
    // Vérification de la version PHP
    if (version_compare(PHP_VERSION, '7.4', '<')) {
        echo "Ce plugin nécessite PHP 7.4 ou supérieur";
        return false;
    }

    // Vérification de la version GLPI
    if (!method_exists('Plugin', 'checkGlpiVersion')) {
        echo "Cette version de GLPI n'est pas supportée";
        return false;
    }

    if (!Plugin::checkGlpiVersion(PLUGIN_SIEM_WAZUH_MIN_GLPI, PLUGIN_SIEM_WAZUH_MAX_GLPI)) {
        echo "Ce plugin nécessite GLPI >= " . PLUGIN_SIEM_WAZUH_MIN_GLPI . " et < " . PLUGIN_SIEM_WAZUH_MAX_GLPI;
        return false;
    }

    // Vérification des extensions PHP nécessaires
    $required_extensions = ['curl', 'json', 'mbstring', 'openssl'];
    foreach ($required_extensions as $ext) {
        if (!extension_loaded($ext)) {
            echo "Extension PHP manquante: $ext";
            return false;
        }
    }

    return true;
}

/**
 * Check plugin configuration
 */
function plugin_siem_wazuh_check_config() {
    return true;
}

/**
 * Plugin display item hook
 */
function plugin_siem_wazuh_display_item($item) {
    if (in_array($item->getType(), ['Computer', 'NetworkEquipment', 'Peripheral', 'Phone', 'Printer'])) {
        if (Session::haveRight('plugin_siem_wazuh_alert', READ)) {
            $tab = new PluginSiemWazuhTab();
            $tab->showForItem($item);
        }
    }
}

/**
 * Get cron description
 */
function plugin_siem_wazuh_cron_description($name) {
    switch ($name) {
        case 'sync_alerts':
            return __('Synchronize Wazuh alerts', 'siem-wazuh');
        case 'cleanup_old_alerts':
            return __('Cleanup old alerts', 'siem-wazuh');
        default:
            return '';
    }
}

/**
 * Execute cron task
 */
function plugin_siem_wazuh_cron($name) {
    global $DB;

    switch ($name) {
        case 'sync_alerts':
            return PluginSiemWazuhAlert::cronSyncAlerts();
        
        case 'cleanup_old_alerts':
            return PluginSiemWazuhAlert::cronCleanupOldAlerts();
        
        default:
            return false;
    }
}

/**
 * Get additional menu entries
 */
function plugin_siem_wazuh_get_additional_menu_entries($forcetab = '') {
    $entries = [];
    
    if (Session::haveRight('plugin_siem_wazuh_server', READ)) {
        $entries['<img src="' . Plugin::getWebDir('siem-wazuh') . '/pics/wazuh-logo.png" width="16" height="16" alt="">&nbsp;' . 
                __('Wazuh Servers', 'siem-wazuh')] = '/plugins/siem-wazuh/front/wazuhserver.php';
    }
    
    return $entries;
}

/**
 * Get dropdown values
 */
function plugin_siem_wazuh_get_dropdown_values($post, $dropdown_name = '') {
    switch ($dropdown_name) {
        case 'PluginSiemWazuhServer':
            return PluginSiemWazuhServer::getDropdownValues($post);
        default:
            return [];
    }
}

/**
 * Get search options
 */
function plugin_siem_wazuh_getAddSearchOptions($itemtype) {
    $sopt = [];
    
    switch ($itemtype) {
        case 'Computer':
        case 'NetworkEquipment':
            $sopt[5150]['table']         = 'glpi_plugin_siem_wazuh_alerts';
            $sopt[5150]['field']         = 'id';
            $sopt[5150]['name']          = __('Wazuh Alerts', 'siem-wazuh');
            $sopt[5150]['forcegroupby']  = true;
            $sopt[5150]['usehaving']     = true;
            $sopt[5150]['datatype']      = 'count';
            $sopt[5150]['massiveaction'] = false;
            $sopt[5150]['joinparams']    = [
                'jointype'          => 'itemtype_item',
                'specific_itemtype' => $itemtype
            ];
            break;
    }
    
    return $sopt;
}