<?php
/**
 * Plugin Name: Unity Lease Manager
 * Plugin URI: https://wavenodes.io/unityapp/
 * Description: Manage Unity app lease codes with Google Sheets sync and email automation
 * Version: 1.0.0
 * Author: WaveNodes
 * License: GPL v2 or later
 * Text Domain: unity-lease-manager
 */

// Prevent direct access
if (!defined('ABSPATH')) {
    exit;
}

// Define plugin constants
define('UNITY_PLUGIN_VERSION', '1.0.0');
define('UNITY_PLUGIN_PATH', plugin_dir_path(__FILE__));
define('UNITY_PLUGIN_URL', plugin_dir_url(__FILE__));
define('UNITY_PLUGIN_BASENAME', plugin_basename(__FILE__));

// Database table name
global $wpdb;
define('UNITY_LEASE_TABLE', $wpdb->prefix . 'unity_lease_codes');

// Required files
require_once UNITY_PLUGIN_PATH . 'includes/class-database.php';
require_once UNITY_PLUGIN_PATH . 'includes/class-google-sheets.php';
require_once UNITY_PLUGIN_PATH . 'includes/class-email-handler.php';
require_once UNITY_PLUGIN_PATH . 'includes/class-landing-page.php';
require_once UNITY_PLUGIN_PATH . 'includes/class-admin.php';

/**
 * Main plugin class
 */
class UnityLeaseManager {
    
    private static $instance = null;
    
    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    private function __construct() {
        $this->init_hooks();
    }
    
    private function init_hooks() {
        // Activation/deactivation hooks
        register_activation_hook(__FILE__, array($this, 'activate'));
        register_deactivation_hook(__FILE__, array($this, 'deactivate'));
        
        // Initialize components
        add_action('plugins_loaded', array($this, 'init_components'));
        
        // Add shortcode
        add_shortcode('unity_landing', array($this, 'landing_page_shortcode'));
        
        // AJAX handlers for frontend
        add_action('wp_ajax_unity_request_lease', array($this, 'ajax_request_lease'));
        add_action('wp_ajax_nopriv_unity_request_lease', array($this, 'ajax_request_lease'));
        
        // AJAX handlers for admin
        add_action('wp_ajax_unity_export_codes', array($this, 'ajax_export_codes'));
        add_action('wp_ajax_unity_sync_sheets', array($this, 'ajax_sync_sheets'));
        add_action('wp_ajax_unity_pull_sheets', array($this, 'ajax_pull_sheets'));
        add_action('wp_ajax_unity_push_sheets', array($this, 'ajax_push_sheets'));
        add_action('wp_ajax_unity_test_google_connection', array($this, 'ajax_test_google_connection'));
        add_action('wp_ajax_unity_reset_settings', array($this, 'ajax_reset_settings'));
        add_action('wp_ajax_unity_clear_logs', array($this, 'ajax_clear_logs'));
        add_action('wp_ajax_unity_repair_tables', array($this, 'ajax_repair_tables'));
        // Test Unity DB access
        add_action('init', array($this, 'test_unity_db'));
    }
    
    public function activate() {
        // Create database tables
        Unity_Database::create_tables();
        
        // Set default options
        $default_options = array(
            'email_from' => 'contactunitynodes@gmail.com',
            'email_reply_to' => 'contact@wavenodes.io',
            'email_bcc' => 'contact@wavenodes.io',
            'email_subject' => 'Your Unity App Lease Code',
            'gmail_client_id' => '',
            'gmail_client_secret' => '',
            'gmail_refresh_token' => '',
            'google_sheet_id' => '1vsi3w47p3Eu3h7YUXMxb0jLLir_WmNkrIcI5ywcJHns',
            'sync_interval' => 300, // 5 minutes in seconds
            'lease_expiry_hours' => 24,
        );
        
        foreach ($default_options as $key => $value) {
            if (!get_option('unity_' . $key)) {
                add_option('unity_' . $key, $value);
            }
        }
        
        // Create sync script
        Unity_Google_Sheets::create_sync_script();
        
        // Schedule cron jobs
        if (!wp_next_scheduled('unity_sync_google_sheets')) {
            wp_schedule_event(time(), 'five_minutes', 'unity_sync_google_sheets');
        }
    }
    
    public function deactivate() {
        // Remove cron jobs
        wp_clear_scheduled_hook('unity_sync_google_sheets');
    }
    
    public function init_components() {
        // Initialize components if needed
        if (is_admin()) {
            new Unity_Admin();
        }
        
        // Add custom cron interval
        add_filter('cron_schedules', array($this, 'add_cron_intervals'));
        
        // Hook sync function to cron
        add_action('unity_sync_google_sheets', array($this, 'sync_google_sheets'));
    }
    
    public function add_cron_intervals($schedules) {
        $schedules['five_minutes'] = array(
            'interval' => 300,
            'display' => __('Every 5 minutes')
        );
        return $schedules;
    }
    
    public function sync_google_sheets() {
        // Trigger Google Sheets sync
        Unity_Google_Sheets::sync();
        
        // Update last sync time
        update_option('unity_last_sync', current_time('mysql'));
    }
    
    public function landing_page_shortcode($atts) {
        return Unity_Landing_Page::render($atts);
    }
    
    /**
     * AJAX handler: Request lease code
     */
    public function ajax_request_lease() {
        check_ajax_referer('unity_request_nonce', 'security');
        
        $email = sanitize_email($_POST['email'] ?? '');
        $reference = intval($_POST['reference'] ?? 0);
        $ambassador = sanitize_text_field($_POST['ambassador'] ?? '');
        $user_ip = $_SERVER['REMOTE_ADDR'] ?? '';
        
        if (!is_email($email)) {
            wp_send_json_error(array('message' => __('Please enter a valid email address.', 'unity-lease-manager')));
        }
        
        // Process request
        $result = Unity_Database::assign_lease_code($email, $reference, $ambassador, $user_ip);
        
        if ($result['success']) {
            // Send email
            $email_sent = Unity_Email_Handler::send_lease_email(
                $email,
                $result['lease_code'],
                $result['reference'] ?? $reference,
                $ambassador,
                $user_ip
            );
            
            if ($email_sent) {
                wp_send_json_success(array(
                    'message' => __('Check your e-mail inbox or spam folder for installation instructions.', 'unity-lease-manager'),
                    'lease_code' => $result['lease_code']
                ));
            } else {
                wp_send_json_error(array(
                    'message' => __('Lease code assigned but email failed to send. Please contact support.', 'unity-lease-manager')
                ));
            }
        } else {
            wp_send_json_error(array('message' => $result['message']));
        }
    }
    
    /**
     * AJAX handler: Export lease codes
     */
    public function ajax_export_codes() {
        check_ajax_referer('unity_admin_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_die('Unauthorized');
        }
        
        global $wpdb;
        $table_name = UNITY_LEASE_TABLE;
        
        $codes = $wpdb->get_results("SELECT * FROM $table_name ORDER BY id", ARRAY_A);
        
        if (empty($codes)) {
            wp_die('No lease codes to export.');
        }
        
        // Set headers for CSV download
        header('Content-Type: text/csv');
        header('Content-Disposition: attachment; filename="unity-lease-codes-' . date('Y-m-d') . '.csv"');
        
        $output = fopen('php://output', 'w');
        
        // Write header
        fputcsv($output, array_keys($codes[0]));
        
        // Write data
        foreach ($codes as $code) {
            fputcsv($output, $code);
        }
        
        fclose($output);
        exit;
    }
    
    /**
     * AJAX handler: Sync with Google Sheets
     */
    public function ajax_sync_sheets() {
        check_ajax_referer('unity_admin_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => 'Unauthorized'));
        }
        
        $result = Unity_Google_Sheets::sync();
        wp_send_json($result);
    }
    
    /**
     * AJAX handler: Pull from Google Sheets
     */
    public function ajax_pull_sheets() {
        check_ajax_referer('unity_admin_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => 'Unauthorized'));
        }
        
        $result = Unity_Google_Sheets::pull();
        wp_send_json($result);
    }
    
    /**
     * AJAX handler: Push to Google Sheets
     */
    public function ajax_push_sheets() {
        check_ajax_referer('unity_admin_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => 'Unauthorized'));
        }
        
        $result = Unity_Google_Sheets::push();
        wp_send_json($result);
    }
    
    /**
     * AJAX handler: Test Google connection
     */
    public function ajax_test_google_connection() {
        check_ajax_referer('unity_admin_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => 'Unauthorized'));
        }
        
        $result = Unity_Google_Sheets::test_connection();
        wp_send_json($result);
    }
    
    /**
     * AJAX handler: Reset settings
     */
    public function ajax_reset_settings() {
        check_ajax_referer('unity_admin_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => 'Unauthorized'));
        }
        
        // Define default options
        $default_options = array(
            'email_from' => 'contactunitynodes@gmail.com',
            'email_reply_to' => 'contact@wavenodes.io',
            'email_bcc' => 'contact@wavenodes.io',
            'email_subject' => 'Your Unity App Lease Code',
            'google_sheet_id' => '1vsi3w47p3Eu3h7YUXMxb0jLLir_WmNkrIcI5ywcJHns',
            'sync_interval' => 300,
            'lease_expiry_hours' => 24,
        );
        
        // Reset each option
        foreach ($default_options as $key => $value) {
            update_option('unity_' . $key, $value);
        }
        
        wp_send_json_success(array('message' => 'Settings reset to defaults.'));
    }
    
    /**
     * AJAX handler: Clear logs
     */
    public function ajax_clear_logs() {
        check_ajax_referer('unity_admin_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => 'Unauthorized'));
        }
        
        global $wpdb;
        $logs_table = $wpdb->prefix . 'unity_logs';
        
        $wpdb->query("TRUNCATE TABLE $logs_table");
        
        wp_send_json_success(array('message' => 'Logs cleared.'));
    }
    
    /**
     * AJAX handler: Repair tables
     */
    public function ajax_repair_tables() {
        check_ajax_referer('unity_admin_nonce', 'nonce');
        
        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => 'Unauthorized'));
        }
        
        // Repair lease codes table
        Unity_Database::create_tables();
        
        wp_send_json_success(array('message' => 'Tables repaired.'));
    }

    /**
     * Test database access for Unity database
     */
    public function test_unity_db() {
        if (!current_user_can("manage_options") || !isset($_GET["test_unity_db"])) {
            return;
        }
        global $wpdb;
        // Try to connect to Unity database
        $unity_db = new wpdb(DB_USER, DB_PASSWORD, "Unity", DB_HOST);
        if ($unity_db->error) {
            echo "<pre>Connection error: " . esc_html($unity_db->error) . "</pre>";
            return;
        }
        // List tables
        $tables = $unity_db->get_results("SHOW TABLES");
        echo "<pre>Tables in Unity database:\n";
        foreach ($tables as $table) {
            $table_name = array_values((array)$table)[0];
            echo "- " . esc_html($table_name) . "\n";
        }
        echo "</pre>";
        // Create test table
        $unity_db->query("CREATE TABLE IF NOT EXISTS unity_test (id INT AUTO_INCREMENT PRIMARY KEY, data VARCHAR(100))");
        $unity_db->insert("unity_test", array("data" => "test entry"));
        $id = $unity_db->insert_id;
        echo "<pre>Inserted record ID: " . esc_html($id) . "</pre>";
        $row = $unity_db->get_row("SELECT * FROM unity_test WHERE id = $id");
        echo "<pre>Retrieved: " . esc_html(print_r($row, true)) . "</pre>";
        $unity_db->query("DROP TABLE unity_test");
        echo "<pre>Test table cleaned up.</pre>";
        exit;
    }
}

// Initialize plugin
function unity_lease_manager_init() {
    return UnityLeaseManager::get_instance();
}
add_action('plugins_loaded', 'unity_lease_manager_init');

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