/*
Plugin Name: Keyword Blog Analyzer & Google Docs Exporter
Description: An advanced blog management tool for listing blogs based on keywords, estimating page count, exporting to Google Docs, and marking blog usage status.
Version: 1.0
Author: SpiritMeaning Dev
*/

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

class Keyword_Blog_Analyzer_Exporter {

    private $option_name = 'kbae_blog_status';

    public function __construct() {
        add_action('admin_menu', [$this, 'register_admin_menu']);
        add_action('admin_enqueue_scripts', [$this, 'enqueue_admin_scripts']);
        add_action('wp_ajax_kbae_update_status', [$this, 'handle_status_update']);
        add_action('wp_ajax_kbae_export_doc', [$this, 'export_to_google_docs']);
    }

    public function register_admin_menu() {
        add_menu_page('Blog Keyword Analyzer', 'Blog Analyzer', 'manage_options', 'blog-keyword-analyzer', [$this, 'render_admin_page']);
    }

    public function enqueue_admin_scripts() {
        wp_enqueue_script('kbae-script', plugin_dir_url(__FILE__) . 'assets/js/kbae-script.js', ['jquery'], null, true);
        wp_localize_script('kbae-script', 'kbae_ajax', [
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('kbae_nonce')
        ]);
    }

    public function render_admin_page() {
        if (!current_user_can('manage_options')) return;
        ob_start();

        $status_data = get_option($this->option_name, []);
        $keyword = isset($_POST['kbae_keyword']) ? sanitize_text_field($_POST['kbae_keyword']) : '';
        echo '<div class="wrap"><h1>Blog Keyword Analyzer</h1>';
        echo '<form method="post"><input type="text" name="kbae_keyword" placeholder="Enter primary keyword" value="' . esc_attr($keyword) . '"> <input type="submit" class="button button-primary" value="Analyze"></form>';

        if ($keyword) {
            $query = new WP_Query([
                'post_type' => 'post',
                'posts_per_page' => -1,
                's' => $keyword
            ]);
            if ($query->have_posts()) {
                echo '<table class="wp-list-table widefat fixed striped"><thead><tr><th>Title</th><th>Main Keyword</th><th>Keywords</th><th>Words</th><th>Pages</th><th>Book Name</th><th>Status</th><th>Toggle</th><th>Export</th></tr></thead><tbody>';
                while ($query->have_posts()) {
                    $query->the_post();
                    $post_id = get_the_ID();
                    $content = strip_tags(get_post_field('post_content', $post_id));
                    $word_count = str_word_count($content);
                    $page_estimate = ceil($word_count / 250);
                    $title = get_the_title();
                    $post_status = $status_data[$post_id]['locked'] ?? false;
                    $book_name = $status_data[$post_id]['book'] ?? '';

                    echo '<tr>
                        <td>' . esc_html($title) . '</td>
                        <td>' . esc_html($keyword) . '</td>
                        <td>' . esc_html(join(', ', wp_get_post_tags($post_id, ['fields' => 'names']))) . '</td>
                        <td>' . $word_count . '</td>
                        <td>' . $page_estimate . '</td>
                        <td><input type="text" class="book-name" data-id="' . $post_id . '" value="' . esc_attr($book_name) . '" ' . ($post_status ? 'readonly' : '') . '></td>
                        <td><input type="checkbox" class="status-check" data-id="' . $post_id . '" ' . ($post_status ? 'checked disabled' : '') . '></td>
                        <td><button class="toggle-status button" data-id="' . $post_id . '">' . ($post_status ? 'Unlock' : 'Lock') . '</button></td>
                        <td><button class="export-doc button-primary" data-id="' . $post_id . '">Export</button></td>
                    </tr>';
                }
                echo '</tbody></table>';
                wp_reset_postdata();
            } else {
                echo '<p>No posts found.</p>';
            }
        }
        echo '</div>';

        ob_end_flush();
    }

    public function handle_status_update() {
        check_ajax_referer('kbae_nonce', 'nonce');
        $post_id = intval($_POST['post_id']);
        $lock = filter_var($_POST['lock'], FILTER_VALIDATE_BOOLEAN);
        $book = sanitize_text_field($_POST['book']);

        $data = get_option($this->option_name, []);
        $data[$post_id] = [
            'locked' => $lock,
            'book' => $book
        ];

        update_option($this->option_name, $data);
        wp_send_json_success();
    }

    public function export_to_google_docs() {
        require_once __DIR__ . '/vendor/autoload.php';

        $client = new Google_Client();
        $client->setApplicationName('KBAE Exporter');
        $client->setScopes([Google_Service_Drive::DRIVE_FILE, Google_Service_Docs::DOCUMENTS]);
        $client->setAuthConfig(__DIR__ . '/client_secret.json');
        $client->setAccessType('offline');

        $tokenPath = __DIR__ . '/google/token.json';
        if (file_exists($tokenPath)) {
            $accessToken = json_decode(file_get_contents($tokenPath), true);
            $client->setAccessToken($accessToken);
        }

        if ($client->isAccessTokenExpired()) {
            if ($client->getRefreshToken()) {
                $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
            } else {
                $authUrl = $client->createAuthUrl();
                wp_send_json_error(['message' => 'Please authorize via: ' . $authUrl]);
            }
            file_put_contents($tokenPath, json_encode($client->getAccessToken()));
        }

        $post_id = intval($_POST['post_id']);
        $post = get_post($post_id);
        $content = strip_tags($post->post_content);
        $title = $post->post_title;

        $docsService = new Google_Service_Docs($client);
        $doc = $docsService->documents->create([
            'title' => $title
        ]);

        $requests = [[
            'insertText' => [
                'location' => ['index' => 1],
                'text' => $content
            ]
        ]];

        $docsService->documents->batchUpdate($doc->documentId, new Google_Service_Docs_BatchUpdateDocumentRequest([
            'requests' => $requests
        ]));

        wp_send_json_success(['message' => 'Exported to Google Docs: ' . $doc->title]);
    }
}

new Keyword_Blog_Analyzer_Exporter();