<?php
/**
 * Plugin Name: AI-Powered Comment Moderator
 * Plugin URI: https://www.aivisualtales.com/product.php
 * Description: AI-based comment moderation for WordPress to filter spam, hate speech, automate approvals and auto Reply.
 * Version: 1.0
 * Author: Andrea Bocchetti
 * License: GPL v2 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: ai-powered-comment-moderator
 * Tags: comments, spam filter, AI moderation, comment auto-moderation, AI auto-reply
 */

if (!defined('ABSPATH')) {
    exit; // Prevent direct access
}

/**
 * Create AI Moderation Table on Plugin Activation
 */
function aicomo_create_moderation_table() {
    global $wpdb;

    $table_name = $wpdb->prefix . "ai_moderation_history"; // Correct WordPress table prefix
    $charset_collate = $wpdb->get_charset_collate(); // Get charset

    require_once ABSPATH . 'wp-admin/includes/upgrade.php'; // Ensure dbDelta() is available

    $sql = "CREATE TABLE IF NOT EXISTS {$table_name} (
        id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
        comment_id BIGINT UNSIGNED NOT NULL,
        action VARCHAR(50) NOT NULL,
        ai_confidence DECIMAL(5,2) DEFAULT NULL,
        moderated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (comment_id) REFERENCES {$wpdb->comments}(comment_ID) ON DELETE CASCADE
    ) {$charset_collate};";

    dbDelta($sql);

}
register_activation_hook(__FILE__, 'aicomo_create_moderation_table');

// 1?? Retrieve API key from WordPress options (or default to empty string).
$aicomo_api_key = get_option('aicomo_api_key', '');

// 2?? Define constants only if they're not defined yet
if (!defined('AICOMO_API_KEY')) {
    define('AICOMO_API_KEY', $aicomo_api_key);
}
if (!defined('AICOMO_PLUGIN_VERSION')) {
    define('AICOMO_PLUGIN_VERSION', '1.0');
}
if (!defined('AICOMO_PLUGIN_DIR')) {
    define('AICOMO_PLUGIN_DIR', plugin_dir_path(__FILE__));
}
if (!defined('AICOMO_MODERATOR_PATH')) {

    define('AICOMO_MODERATOR_PATH', plugin_dir_path(__DIR__));
}
if (!defined('AICOMO_API_ENDPOINT')) {
    define('AICOMO_API_ENDPOINT', 'https://api.openai.com/v1/moderations');
}

// 3?? Include Required Files
require_once AICOMO_PLUGIN_DIR . 'includes/config.php';
require_once AICOMO_PLUGIN_DIR . 'includes/moderation.php';
require_once AICOMO_PLUGIN_DIR . 'includes/admin-page.php';
require_once AICOMO_PLUGIN_DIR . 'includes/ajax.php';
require_once AICOMO_PLUGIN_DIR . 'includes/admin-settings.php';
require_once AICOMO_PLUGIN_DIR . 'includes/chatgpt.php';

/**
 * Enqueue admin scripts & styles for AI Comment Moderator plugin.
 *
 * @param string $hook The current admin page hook.
 */
function aicomo_admin_enqueue_scripts($hook) {
    // Load scripts/styles only on the correct admin page
    if ($hook !== 'toplevel_page_ai-comment-auto-moderator') {
        return;
    }

    // Plugin directory URL for assets
    $plugin_url = plugin_dir_url(__FILE__);

    // Register & enqueue main JS
    wp_enqueue_script(
        'ai-moderator-js',
        $plugin_url . 'assets/js/ai-moderator.js',
        array('jquery'),            // Dependencies
        AICOMO_PLUGIN_VERSION,      // Use new plugin version constant
        true                        // Load in footer
    );

    // Register & enqueue secondary JS
    wp_enqueue_script(
        'ai-main-mod-js',
        $plugin_url . 'assets/js/ai-main-mod.js',
        array('jquery', 'ai-moderator-js'), // Load after `ai-moderator.js`
        AICOMO_PLUGIN_VERSION,
        true
    );

    // Localize script with AJAX variables
    wp_localize_script('ai-moderator-js', 'aiModeratorAjax', array(
        'ajaxurl'  => admin_url('admin-ajax.php'),
        // Updated nonce action name to match your new prefix
        'security' => wp_create_nonce('aicomo_nonce_action'),
    ));

    // Register & enqueue CSS
    wp_enqueue_style(
        'ai-moderator-css',
        $plugin_url . 'assets/css/ai-moderator.css',
        array(),                    // No dependencies
        AICOMO_PLUGIN_VERSION
    );

    // Optionally add `defer` to these scripts for better performance
    add_filter('script_loader_tag', function ($tag, $handle) {
        if (in_array($handle, ['ai-moderator-js', 'ai-main-mod-js'])) {
            return str_replace(' src=', ' defer src=', $tag);
        }
        return $tag;
    }, 10, 2);
}
add_action('admin_enqueue_scripts', 'aicomo_admin_enqueue_scripts');

/**
 * Add defer attribute to AI Moderator JS for better performance (optional extra).
 *
 * @param string $tag    The script tag.
 * @param string $handle The script handle.
 * @return string Modified script tag with defer attribute.
 */
function aicomo_add_defer_to_script($tag, $handle) {
    if ('ai-moderator-js' === $handle) {
        return str_replace('src=', 'defer src=', $tag);
    }
    return $tag;
}
add_filter('script_loader_tag', 'aicomo_add_defer_to_script', 10, 2);

/**
 * Add plugin action links (Settings & Premium) in the Plugins page.
 *
 * @param array $links Existing plugin action links.
 * @return array Modified links with Settings and Premium options.
 */
function aicomo_plugin_links($links) {
    $settings_link = '<a href="' . esc_url(admin_url('options-general.php?page=aicomo-settings')) . '">&#9881; Settings</a>';
    $premium_link  = '<a href="https://aivisualtales.com/product.php" style="color: #FF6A00; font-weight: bold; text-transform: uppercase;">&#128640; Go Premium</a>';
    array_unshift($links, $settings_link, $premium_link);

    return $links;
}
add_filter('plugin_action_links_' . plugin_basename(__FILE__), 'aicomo_plugin_links');