<?php
if (!defined('ABSPATH')) exit;

class AIWEST_Bulk_Actions {
    const LIMIT = 5;

    public static function init() {
        add_filter('bulk_actions-edit-page', [__CLASS__, 'register_actions']);
        add_filter('bulk_actions-edit-post', [__CLASS__, 'register_actions']);
        add_filter('handle_bulk_actions-edit-page', [__CLASS__, 'handle_action'], 10, 3);
        add_filter('handle_bulk_actions-edit-post', [__CLASS__, 'handle_action'], 10, 3);
        add_action('admin_notices', [__CLASS__, 'admin_notice']);
    }

    public static function labels() {
        return [
            'aiwest_visual' => __('AI Webmaster Studio: Preserve content and improve layout', 'ai-webmaster-studio'),
            'aiwest_seo' => __('AI Webmaster Studio: Improve SEO', 'ai-webmaster-studio'),
            'aiwest_improve' => __('AI Webmaster Studio: Expand content', 'ai-webmaster-studio'),
            'aiwest_faq' => __('AI Webmaster Studio: Add FAQ', 'ai-webmaster-studio'),
            'aiwest_cta' => __('AI Webmaster Studio: Add CTA', 'ai-webmaster-studio'),
            'aiwest_image' => __('AI Webmaster Studio: Add image', 'ai-webmaster-studio'),
        ];
    }

    public static function register_actions($actions) {
        foreach (self::labels() as $key=>$label) $actions[$key]=$label;
        return $actions;
    }

    public static function handle_action($redirect_url, $action, $post_ids) {
        if (!isset(self::labels()[$action])) return $redirect_url;
        if (!current_user_can('edit_posts')) return $redirect_url;

        $original_count = count($post_ids);
        $post_ids = array_slice(array_map('intval', (array)$post_ids), 0, self::LIMIT);
        $results = ['action'=>$action,'label'=>self::labels()[$action],'requested'=>$original_count,'limit'=>self::LIMIT,'processed'=>0,'success'=>0,'errors'=>0,'items'=>[],'started_at'=>current_time('mysql')];

        foreach ($post_ids as $post_id) {
            try {
                $post = get_post($post_id);
                if (!$post || !in_array($post->post_type, ['page','post'], true)) throw new Exception(__('Unsupported content type.', 'ai-webmaster-studio'));
                if (!current_user_can('edit_post', $post_id)) throw new Exception(__('You do not have permission to edit this item.', 'ai-webmaster-studio'));
                $results['processed']++;
                $result = self::run_action($action, $post_id);
                if (is_wp_error($result)) throw new Exception($result->get_error_message());
                $results['success']++;
                $message = is_array($result) ? ($result['summary'] ?? __('Task completed.', 'ai-webmaster-studio')) : __('Task completed.', 'ai-webmaster-studio');
                if ($action === 'aiwest_image' && is_numeric($result)) {
                    $message = sprintf(
                        /* translators: %d: WordPress Media Library attachment ID. */
                        __('Featured image added. Attachment ID: %d.', 'ai-webmaster-studio'),
                        intval($result)
                    );
                }
                $results['items'][] = ['id'=>$post_id,'title'=>get_the_title($post_id),'status'=>'success','message'=>$message,'edit_link'=>get_edit_post_link($post_id,''),'preview_link'=>get_preview_post_link($post_id),'view_link'=>get_permalink($post_id)];
            } catch (Throwable $e) {
                $results['errors']++;
                $results['items'][] = ['id'=>$post_id,'title'=>get_the_title($post_id),'status'=>'error','message'=>$e->getMessage()];
                if (class_exists('AIWEST_Logger')) AIWEST_Logger::warning('AI Web bulk action item failed.', ['post_id'=>$post_id,'action'=>$action,'error'=>$e->getMessage()]);
            }
        }

        $results['completed_at'] = current_time('mysql');
        self::store_result($results);
        if (class_exists('AIWEST_History')) {
            $hid = AIWEST_History::add_content('bulk_action', __('Bulk action: ', 'ai-webmaster-studio').self::labels()[$action], '', __('Items: ', 'ai-webmaster-studio').$results['processed']);
            AIWEST_History::update_content(
                $hid,
                $results['errors'] ? 'completed_with_warnings' : 'completed',
                null,
                sprintf(
                    /* translators: 1: Number of successful items. 2: Number of failed items. */
                    __('Success: %1$d, errors: %2$d', 'ai-webmaster-studio'),
                    $results['success'],
                    $results['errors']
                )
            );
        }
        return add_query_arg(['aiwest_bulk_done'=>1,'aiwest_bulk_success'=>$results['success'],'aiwest_bulk_errors'=>$results['errors'],'aiwest_bulk_limited'=>$original_count>self::LIMIT?1:0], $redirect_url);
    }

    public static function run_action($action, $post_id) {
        if ($action === 'aiwest_image') {
            if (!class_exists('AIWEST_Image_Generator')) return new WP_Error('aiwest_missing_image_generator', __('AI image module is unavailable.', 'ai-webmaster-studio'));
            return AIWEST_Image_Generator::generate_for_post($post_id);
        }
        $mode = ['aiwest_visual'=>'visual','aiwest_seo'=>'seo','aiwest_improve'=>'improve','aiwest_faq'=>'faq','aiwest_cta'=>'cta'][$action] ?? 'improve';
        if (class_exists('AIWEST_Content_Development_Action_Service')) {
            return AIWEST_Content_Development_Action_Service::execute($post_id, $mode);
        }
        if (!class_exists('AIWEST_Content_Upgrader')) return new WP_Error('aiwest_missing_content_upgrader', __('Content Development module is unavailable.', 'ai-webmaster-studio'));
        return AIWEST_Content_Upgrader::improve_post($post_id, $mode);
    }

    public static function store_result($results) { set_transient('aiwest_bulk_result_'.get_current_user_id(), $results, HOUR_IN_SECONDS); }

    public static function admin_notice() {
        if (!is_admin() || !AIWEST_Security::get_key('aiwest_bulk_done')) return;
        $results = get_transient('aiwest_bulk_result_'.get_current_user_id());
        $success = absint(AIWEST_Security::get_text('aiwest_bulk_success'));
        $errors = absint(AIWEST_Security::get_text('aiwest_bulk_errors'));
        $limited = (bool) AIWEST_Security::get_key('aiwest_bulk_limited');
        echo '<div class="notice notice-'.($errors?'warning':'success').' is-dismissible"><p><strong>'.esc_html(__('AI Webmaster Studio — bulk action completed.', 'ai-webmaster-studio')).'</strong> '.esc_html(sprintf(
            /* translators: 1: Number of successful items. 2: Number of failed items. */
            __('Success: %1$d, errors: %2$d.', 'ai-webmaster-studio'),
            $success,
            $errors
        ));
        if ($limited) {
            echo ' '.esc_html(sprintf(
                /* translators: %d: Maximum number of items processed in one bulk operation. */
                __('For safety, a maximum of %d items was processed at once.', 'ai-webmaster-studio'),
                self::LIMIT
            ));
        }
        echo '</p>';
        if (is_array($results) && !empty($results['items'])) {
            echo '<ul style="margin-left:18px;list-style:disc;">';
            foreach ($results['items'] as $item) {
                echo '<li><strong>ID '.intval($item['id']).'</strong> '.esc_html($item['title'] ?? '').' — '.esc_html($item['message'] ?? '').' ';
                if (!empty($item['edit_link'])) echo '<a href="'.esc_url($item['edit_link']).'">'.esc_html(__('Edit', 'ai-webmaster-studio')).'</a> ';
                if (!empty($item['preview_link'])) echo '| <a href="'.esc_url($item['preview_link']).'" target="_blank">'.esc_html(__('Preview', 'ai-webmaster-studio')).'</a> ';
                if (!empty($item['view_link'])) echo '| <a href="'.esc_url($item['view_link']).'" target="_blank">'.esc_html(__('View', 'ai-webmaster-studio')).'</a>';
                echo '</li>';
            }
            echo '</ul>';
        }
        echo '</div>';
    }
}
AIWEST_Bulk_Actions::init();