<?php
/**
 * Plugin Name: Eagle Booking - Redsys Payment Gateway
 * Plugin URI: https://informatiq.services
 * Description: Redsys payment gateway integration for Eagle Booking
 * Version: 1.0.0
 * Author: Mălin Cenușă
 * Author URI: https://mălin.ro
 * Text Domain: eb-redsys-gateway
 * Domain Path: /languages
 * Requires at least: 5.0
 * Requires PHP: 7.2
 */

defined('ABSPATH') || exit;

class EB_Redsys_Gateway {

    private static $instance = null;
    
    public static function instance() {
        if (is_null(self::$instance)) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    public function __construct() {
        // Define constants
        $this->define_constants();

        // Initialize plugin
        add_action('plugins_loaded', array($this, 'init'));

        // Register activation and deactivation hooks
        register_activation_hook(__FILE__, array($this, 'activate'));
        register_deactivation_hook(__FILE__, array($this, 'deactivate'));

        // Add plugin action links
        add_filter('plugin_action_links_' . plugin_basename(__FILE__), array($this, 'add_action_links'));
    }

    private function define_constants() {
        define('EB_REDSYS_VERSION', '1.0.0');
        define('EB_REDSYS_FILE', __FILE__);
        define('EB_REDSYS_PATH', plugin_dir_path(__FILE__));
        define('EB_REDSYS_URL', plugin_dir_url(__FILE__));
    }

    public function init() {
        // Check if Eagle Booking is active
        if (!class_exists('Eagle_Booking')) {
            add_action('admin_notices', array($this, 'eagle_booking_missing_notice'));
            return;
        }

        // Load text domain
        load_plugin_textdomain('eb-redsys-gateway', false, dirname(plugin_basename(__FILE__)) . '/languages');

        // Include required files
        $this->includes();

        // Initialize admin
        if (is_admin()) {
            $this->init_admin();
        }

        // Add payment gateway hooks
        $this->add_gateway_hooks();
    }

    private function includes() {
        // API files
        require_once EB_REDSYS_PATH . 'includes/api/class-redsys-api.php';
        require_once EB_REDSYS_PATH . 'includes/api/apiRedsysFinal.php';
        require_once EB_REDSYS_PATH . 'includes/api/RESTConstants.php';
        require_once EB_REDSYS_PATH . 'includes/api/hash.php';
        require_once EB_REDSYS_PATH . 'includes/api/hmac.php';
        require_once EB_REDSYS_PATH . 'includes/api/sha256.php';

        // Gateway files
        require_once EB_REDSYS_PATH . 'includes/gateway/class-eb-redsys-gateway.php';
        require_once EB_REDSYS_PATH . 'includes/gateway/payment-functions.php';
    }

    private function init_admin() {
        require_once EB_REDSYS_PATH . 'includes/admin/settings.php';
        new EB_Redsys_Settings();
    }

    private function add_gateway_hooks() {
        // Add payment method to Eagle Booking
        add_filter('eb_payment_methods', array($this, 'add_payment_method'));

        // Add payment gateway tabs and content
        add_action('eb_payment_gateway_tabs', array($this, 'add_payment_tab'));
        add_action('eb_payment_gateway_content', array($this, 'add_payment_tab_content'));

        // Process payment
        add_action('eb_process_payment_redsys', array($this, 'process_payment'));

        // Handle Redsys notifications
        add_action('init', array($this, 'handle_redsys_notification'));
    }

    public function add_payment_method($methods) {
        if (get_option('eb_redsys_enabled') === 'yes') {
            $methods['redsys'] = array(
                'title' => get_option('eb_redsys_title', __('Credit Card (Redsys)', 'eb-redsys-gateway')),
                'description' => get_option('eb_redsys_description'),
                'action_type' => 'redsys'
            );
        }
        return $methods;
    }

    public function add_payment_tab() {
        if (get_option('eb_redsys_enabled') === 'yes') {
            include EB_REDSYS_PATH . 'includes/gateway/tab.php';
        }
    }

    public function add_payment_tab_content() {
        if (get_option('eb_redsys_enabled') === 'yes') {
            include EB_REDSYS_PATH . 'includes/gateway/tab-content.php';
        }
    }

    public function process_payment($booking_data) {
        try {
            $payment = eb_redsys_payment();
            return $payment->process_payment($booking_data);
        } catch (Exception $e) {
            eb_log('Redsys Payment Error: ' . $e->getMessage());
            return false;
        }
    }

    public function handle_redsys_notification() {
        if (isset($_GET['eb-api']) && $_GET['eb-api'] === 'redsys') {
            try {
                $payment = eb_redsys_payment();
                $result = $payment->process_notification($_POST);

                if ($result['success']) {
                    // Update booking status
                    eb_update_booking_status(
                        $result['booking_id'],
                        'completed',
                        $result['transaction_id']
                    );
                    echo "OK";
                } else {
                    eb_log('Redsys Notification Error: ' . $result['error']);
                    echo "KO";
                }
            } catch (Exception $e) {
                eb_log('Redsys Notification Exception: ' . $e->getMessage());
                echo "KO";
            }
            exit;
        }
    }

    public function activate() {
        // Check if Eagle Booking is active
        if (!class_exists('Eagle_Booking')) {
            deactivate_plugins(plugin_basename(__FILE__));
            wp_die(
                __('Please install and activate Eagle Booking before activating this plugin.', 'eb-redsys-gateway'),
                'Plugin dependency check',
                array('back_link' => true)
            );
        }

        // Default settings
        add_option('eb_redsys_enabled', 'yes');
        add_option('eb_redsys_test_mode', 'yes');
        add_option('eb_redsys_title', __('Credit Card (Redsys)', 'eb-redsys-gateway'));
        add_option('eb_redsys_description', __('Pay securely via credit card using Redsys.', 'eb-redsys-gateway'));

        // Flush rewrite rules
        flush_rewrite_rules();
    }

    public function deactivate() {
        flush_rewrite_rules();
    }

    public function add_action_links($links) {
        $settings_link = '<a href="' . admin_url('admin.php?page=eb-redsys-settings') . '">' . 
                        __('Settings', 'eb-redsys-gateway') . '</a>';
        array_unshift($links, $settings_link);
        return $links;
    }

    public function eagle_booking_missing_notice() {
        ?>
        <div class="notice notice-error">
            <p>
                <?php _e('Eagle Booking - Redsys Payment Gateway requires Eagle Booking plugin to be installed and activated.', 'eb-redsys-gateway'); ?>
            </p>
        </div>
        <?php
    }

    /**
     * Get plugin version
     */
    public function get_version() {
        return EB_REDSYS_VERSION;
    }

    /**
     * Log helper
     */
    public static function log($message, $level = 'info') {
        if (function_exists('eb_log')) {
            eb_log('[Redsys] ' . $message, $level);
        }
    }
}

/**
 * Main instance of plugin
 */
function EB_Redsys() {
    return EB_Redsys_Gateway::instance();
}

// Initialize the plugin
EB_Redsys();