Hooks and Filters

add_filter('woocommerce_payment_gateways', 'zigi_payment_add_gateway_class');

function zigi_payment_add_gateway_class($gateways)
{
    $gateways[] = 'Zigi_Payment_WC_Gateway';
    return $gateways;
}

add_action(
    'woocommerce_update_options_payment_gateways_' . $this->id,
    array($this, 'process_admin_options')
);

add_action('before_woocommerce_init', 'zigi_payment_hpos_compatibility');

function zigi_payment_hpos_compatibility()
{
    if (class_exists(\Automattic\WooCommerce\Utilities\FeaturesUtil::class)) {
        \Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility(
            'custom_order_tables',
            __FILE__,
            true
        );
    }
}

add_action('plugins_loaded', 'zigi_payment_init_gateway_class', 11);

function zigi_payment_init_gateway_class()
{
    if (class_exists('WC_Payment_Gateway')) {
        require_once plugin_dir_path(__FILE__) . 'functions.php';
        
        if (!class_exists('Zigi_Payment_WC_Gateway')) {
            class Zigi_Payment_WC_Gateway extends WC_Payment_Gateway
            {
                // Gateway implementation
            }
        }
    }
}

add_action('admin_enqueue_scripts', 'zigi_payment_admin_script');

function zigi_payment_admin_script()
{
    if (!did_action('wp_enqueue_media')) {
        wp_enqueue_media();
    }
    
    wp_enqueue_script(
        'zigi-payment-admin',
        plugins_url('/assets/woopro.js', __FILE__),
        array('jquery'),
        '1.1',
        false
    );
    
    wp_enqueue_style(
        'zigi-payment-admin',
        plugins_url('/assets/woopro.css', __FILE__),
        array(),
        '1.1'
    );
}

add_action('wp_enqueue_scripts', 'zigi_payment_front_script');

function zigi_payment_front_script()
{
    wp_enqueue_script(
        'zigi_payment_qr',
        plugins_url('assets/woopro-front.js', __FILE__),
        array('jquery'),
        '1.1',
        false
    );
    
    wp_enqueue_style(
        'zigi_payment_qr',
        plugins_url('assets/woopro-front.css', __FILE__),
        array(),
        '1.1'
    );
    
    // Localize AJAX URL and nonce
    wp_localize_script(
        'zigi_payment_qr',
        'kwajaxurl',
        array(
            'ajaxurl' => admin_url('admin-ajax.php'),
            'nonce'   => wp_create_nonce('zigi_payment_qr_nonce')
        )
    );
    
    // Localize translatable strings
    wp_localize_script(
        'zigi_payment_qr',
        'kwp_translate',
        array(
            'kwp_pqr_btn_continue'  => __('Continuar', 'paga-con-zigi'),
            'kwp_pqr_upload_images' => __('Por favor sube solo imágenes', 'paga-con-zigi'),
        )
    );
}

add_filter('upload_dir', 'zigi_payment_qr_code_upload_dir');

function zigi_payment_qr_code_upload_dir($dirs)
{
    $custom_subdir = '/zigi-payment-qrcode';
    
    $new_path = $dirs['basedir'] . $custom_subdir;
    $new_url  = $dirs['baseurl'] . $custom_subdir;
    
    // Create folder if it doesn't exist
    global $wp_filesystem;
    if (!$wp_filesystem) {
        require_once ABSPATH . '/wp-admin/includes/file.php';
        WP_Filesystem();
    }
    
    if (!$wp_filesystem->is_dir($new_path)) {
        $wp_filesystem->mkdir($new_path);
        $wp_filesystem->put_contents($new_path . '/index.html', '', FS_CHMOD_FILE);
    }
    
    return array_merge($dirs, array(
        'path'   => $new_path,
        'url'    => $new_url,
        'subdir' => $custom_subdir,
    ));
}

add_action('wp_ajax_zigi_payment_qr_code', 'zigi_payment_qr_code_callback');
add_action('wp_ajax_nopriv_zigi_payment_qr_code', 'zigi_payment_qr_code_callback');

function zigi_payment_qr_code_callback()
{
    // Verify nonce
    $wp_nonce = isset($_POST['nonce']) ? sanitize_text_field(wp_unslash($_POST['nonce'])) : '';
    if (!$wp_nonce || !wp_verify_nonce($wp_nonce, 'zigi_payment_qr_nonce')) {
        wp_send_json_error('Nonce inválido.', 403);
    }
    
    // Validate file upload
    if (!isset($_FILES['files'])) {
        wp_send_json_error('Archivo no recibido.', 400);
    }
    
    // Sanitize file data
    $file = [
        'name'     => sanitize_file_name($_FILES['files']['name']),
        'type'     => sanitize_mime_type($_FILES['files']['type']),
        'tmp_name' => sanitize_text_field($_FILES['files']['tmp_name']),
        'error'    => absint($_FILES['files']['error']),
        'size'     => absint($_FILES['files']['size']),
    ];
    
    // Validate file type
    $check = wp_check_filetype_and_ext($file['tmp_name'], $file['name']);
    $ext = $check['ext'];
    
    if (!in_array($ext, ['jpg', 'jpeg', 'png', 'gif'])) {
        wp_send_json_error('Tipo de archivo inválido.', 400);
    }
    
    // Handle upload with custom directory
    require_once ABSPATH . 'wp-admin/includes/file.php';
    add_filter('upload_dir', 'zigi_payment_qr_code_upload_dir');
    
    $overrides = array(
        'test_form' => false,
        'mimes'     => array(
            'jpg|jpeg' => 'image/jpeg',
            'png'      => 'image/png',
            'gif'      => 'image/gif',
        ),
    );
    
    // Add timestamp to filename
    $file_name = pathinfo($file['name'], PATHINFO_FILENAME);
    $new_filename = sanitize_file_name($file_name . '-' . time() . "." . $ext);
    $file['name'] = $new_filename;
    
    $file_return = wp_handle_upload($file, $overrides);
    
    remove_filter('upload_dir', 'zigi_payment_qr_code_upload_dir');
    
    if (isset($file_return['url'])) {
        wp_send_json_success([
            'message' => 'Archivo subido.',
            'url'     => esc_url_raw($file_return['url'])
        ]);
    } else {
        wp_send_json_error('Falló la carga.', 500);
    }
    
    wp_die();
}

add_action('add_meta_boxes', 'zigi_payment_meta_box');

function zigi_payment_meta_box()
{
    if (defined('WC_VERSION') && version_compare(WC_VERSION, '7.0.0', '>=')) {
        // HPOS compatible
        add_meta_box(
            'zigi-payment-meta-box',
            __('Comprobante de Pago QR', 'paga-con-zigi'),
            'zigi_payment_meta_box_callback',
            'woocommerce_page_wc-orders',
            'normal'
        );
    } else {
        // Legacy post-based orders
        add_meta_box(
            'zigi-payment-meta-box',
            __('Comprobante de Pago QR', 'paga-con-zigi'),
            'zigi_payment_meta_box_callback',
            'shop_order',
            'normal'
        );
    }
}

function zigi_payment_meta_box_callback($post)
{
    $object = $post;
    if (!is_object($post) || !is_a($post, 'WC_Order')) {
        $object = wc_get_order($post->ID);
    }
    
    if ($object) {
        $zigi_payment_qrcode = $object->get_meta('zigi-payment-qrcode', true);
        
        if (!empty($zigi_payment_qrcode) && esc_url($zigi_payment_qrcode)) {
            echo '<a href="' . esc_url($zigi_payment_qrcode) . '" target="_blank">';
            echo '<img src="' . esc_url($zigi_payment_qrcode) . '" alt="Payment Receipt" width="200" height="200" loading="lazy" />';
            echo '</a>';
        }
    }
}

add_action('wp_footer', 'zigi_payment_popup');

function zigi_payment_popup()
{
    $options = get_option('woocommerce_zigi_payment_settings');
    ?>
    <div class="popup-wrapper">
        <span class="helper"></span>
        <div class="popup-main-wrapper">
            <div class="popupCloseButton">&times;</div>
            <div class="first-step" data-price-limit="<?php echo esc_attr($options['limit_amount'] ?? ''); ?>">
                <?php if (!empty($options['preview_qr'])) { ?>
                    <img src="<?php echo esc_url($options['preview_qr']); ?>" class="popup-qr" alt="QR Code" />
                    <span class="price"><?php echo wp_kses_post(WC()->cart->get_cart_total()); ?></span>
                <?php } ?>
            </div>
            <div class="second-step">
                <form method="post" enctype="multipart/form-data" class="box has-advanced-upload">
                    <div class="box__input">
                        <input type="file" name="files" id="file" class="box__file" accept=".png, .jpg, .jpeg, .gif">
                        <label for="file">Drag and drop file to upload</label>
                        <button type="submit" class="box__button">Select File</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
    <?php
}