<?php
/**
 * Plugin Name: 3plnext
 * Description: Connects WooCommerce stores to 3plnext SaaS platform.
 * Version: 1.0.0
 * Author: 3plnext
 * Requires at least: 6.0
 * Requires PHP: 8.0
 * WC requires at least: 6.0
 * WC tested up to: 8.0
 * Text Domain: 3plnext
 * License: GPLv2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 */

if (!defined('ABSPATH')) {
    exit;
}

define('THREEPLNEXT_WC_VERSION', '1.0.0');
define('THREEPLNEXT_WC_PLUGIN_FILE', __FILE__);
define('THREEPLNEXT_WC_PATH', plugin_dir_path(__FILE__));
define('THREEPLNEXT_WC_URL', plugin_dir_url(__FILE__));

/**
 * Simple autoloader for ThreePLNext namespace.
 */
spl_autoload_register(function (string $class): void {
    $prefix = 'ThreePLNext\\';
    $base_dir = THREEPLNEXT_WC_PATH . 'includes/';
    $len = strlen($prefix);

    if (strncmp($prefix, $class, $len) !== 0) {
        return;
    }

    $relative_class = substr($class, $len);
    $relative_class = str_replace('\\', '/', $relative_class);
    $parts = explode('/', $relative_class);
    $class_name = end($parts);
    $file = $base_dir . 'class-' . strtolower(str_replace('_', '-', $class_name)) . '.php';

    if (file_exists($file)) {
        require_once $file;
    }
});

/**
 * Declare WooCommerce compatibility (HPOS).
 */
add_action('before_woocommerce_init', function () {
    if (class_exists('Automattic\\WooCommerce\\Utilities\\FeaturesUtil')) {
        \Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility(
            'custom_order_tables',
            __FILE__,
            true
        );
    }
});

/**
 * Multisite-safe option getters/setters.
 */
function threeplnext_wc_get_option(string $key, $default = '') {
    if (is_multisite()) {
        return get_site_option($key, $default);
    }

    return get_option($key, $default);
}

function threeplnext_wc_update_option(string $key, $value): bool {
    if (is_multisite()) {
        return update_site_option($key, $value);
    }

    return update_option($key, $value);
}

function threeplnext_wc_delete_option(string $key): bool {
    if (is_multisite()) {
        return delete_site_option($key);
    }

    return delete_option($key);
}

/**
 * Migrate old myapp_* options to threeplnext_* options if present.
 */
function threeplnext_wc_migrate_options(): void {
    $migrations = array(
        'myapp_wc_token'           => 'threeplnext_wc_token',
        'myapp_wc_email'           => 'threeplnext_wc_email',
        'myapp_wc_store_url'       => 'threeplnext_wc_store_url',
        'myapp_wc_key_id'          => 'threeplnext_wc_key_id',
        'myapp_wc_consumer_key'    => 'threeplnext_wc_consumer_key',
        'myapp_wc_consumer_secret' => 'threeplnext_wc_consumer_secret',
        'myapp_wc_webhook_status'  => 'threeplnext_wc_webhook_status',
    );

    foreach ($migrations as $old_key => $new_key) {
        $current = threeplnext_wc_get_option($new_key, null);
        if ($current !== null && $current !== '') {
            continue;
        }

        $old_value = threeplnext_wc_get_option($old_key, null);
        if ($old_value !== null && $old_value !== '') {
            threeplnext_wc_update_option($new_key, $old_value);
        }
    }
}

/**
 * Activation: verify WooCommerce is active.
 */
function threeplnext_wc_activate(): void {
    if (!function_exists('is_plugin_active')) {
        require_once ABSPATH . 'wp-admin/includes/plugin.php';
    }

    $wc_active = is_plugin_active('woocommerce/woocommerce.php') || is_plugin_active_for_network('woocommerce/woocommerce.php');

    if (!$wc_active) {
        deactivate_plugins(plugin_basename(__FILE__));
        wp_die(
            esc_html__('3plnext requires WooCommerce to be active.', '3plnext'),
            esc_html__('Plugin activation failed', '3plnext'),
            array('back_link' => true)
        );
    }

    threeplnext_wc_migrate_options();
}

register_activation_hook(__FILE__, 'threeplnext_wc_activate');

/**
 * Initialize plugin.
 */
function threeplnext_wc_init(): void {
    if (!class_exists('WooCommerce')) {
        add_action('admin_notices', function () {
            echo '<div class="notice notice-error"><p>' . esc_html__('3plnext requires WooCommerce to be active.', '3plnext') . '</p></div>';
        });

        return;
    }

    threeplnext_wc_migrate_options();

    \ThreePLNext\WooCommerce\Admin::init();
    \ThreePLNext\WooCommerce\Auth::init();
}

add_action('plugins_loaded', 'threeplnext_wc_init');