<?php
/**
 * Plugin Name: AEO Bob Lite
 * Plugin URI: https://wordpress.org/plugins/aeo-bob-lite/
 * Description: Free SEO and AEO scores, plus AI suggestions and one-click apply with your own OpenAI key. Optimize your content for AI search engines like ChatGPT, Claude, and Perplexity.
 * Version: 1.5.93
 * Author: AEO Bob Team (Master22 Solutions)
 * Author URI: https://aeobob.com
 * License: GPLv2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: aeo-bob-lite
 * Requires at least: 5.0
 * Tested up to: 7.1
 * Requires PHP: 7.4
 */

// Prevent direct access
if (!defined('ABSPATH')) {
    exit;
}

// Check PHP version compatibility
if (version_compare(PHP_VERSION, '7.4', '<')) {
    add_action('admin_notices', function() {
        echo '<div class="notice notice-error"><p>';
        echo '<strong>' . esc_html__('AEO Bob Lite Error:', 'aeo-bob-lite') . '</strong> ';
        echo esc_html(
            sprintf(
                /* translators: %s: Current PHP version */
                __('This plugin requires PHP 7.4 or higher. Your current PHP version is %s. Please contact your hosting provider to upgrade PHP.', 'aeo-bob-lite'),
                PHP_VERSION
            )
        );
        echo '</p></div>';
    });
    return;
}

// Check WordPress version compatibility
if (version_compare(get_bloginfo('version'), '5.0', '<')) {
    add_action('admin_notices', function() {
        echo '<div class="notice notice-error"><p>';
        echo '<strong>' . esc_html__('AEO Bob Lite Error:', 'aeo-bob-lite') . '</strong> ';
        echo esc_html__('This plugin requires WordPress 5.0 or higher. Please upgrade WordPress.', 'aeo-bob-lite');
        echo '</p></div>';
    });
    return;
}

// Define plugin constants (with checks to prevent conflicts)
if ( ! defined( 'AEO_BOB_LITE_VERSION' ) ) {
	define( 'AEO_BOB_LITE_VERSION', '1.5.93' );
}
if (!defined('AEO_BOB_LITE_FILE')) {
    define('AEO_BOB_LITE_FILE', __FILE__);
}
if (!defined('AEO_BOB_LITE_PATH')) {
    define('AEO_BOB_LITE_PATH', plugin_dir_path(__FILE__));
}
if (!defined('AEO_BOB_LITE_URL')) {
    define('AEO_BOB_LITE_URL', plugin_dir_url(__FILE__));
}

/**
 * v1.5.80: the one official AEO Bob logo (same file as AEO Bob Pro's aeo_bob_logo_url():
 * assets/images/aeoboblogo.png, 512x512). Every Lite screen uses this URL.
 */
if (!function_exists('aeo_bob_lite_logo_url')) {
    function aeo_bob_lite_logo_url() {
        return plugins_url('assets/images/aeoboblogo.png', AEO_BOB_LITE_FILE);
    }
}

/**
 * v1.5.81: what AEO Bob Pro adds over Lite - the ONE list the dashboard "Go Pro" card, the
 * optimization panel and the upgrade page render, so they can't drift apart. Every entry is
 * something Pro ships (checked against the Pro code); Lite's own AI suggestions and apply are
 * not listed here because Lite has them.
 *
 * @return array[] each array('icon', 'title', 'description', 'lite' => what Lite has instead, '' = nothing)
 */
if (!function_exists('aeo_bob_lite_pro_features')) {
    function aeo_bob_lite_pro_features() {
        return array(
            // v1.5.82: these three lead, in this order.
            array('icon' => '✏️', 'title' => __('Title and meta description rewrites', 'aeo-bob-lite'), 'description' => __('AI rewrites of the post title and meta description.', 'aeo-bob-lite'), 'lite' => ''),
            array('icon' => '🧩', 'title' => __('Full-page content and grammar passes', 'aeo-bob-lite'), 'description' => __('Content and grammar suggestions for the whole page, section by section, plus headings and FAQs - not just 3 sentences per request.', 'aeo-bob-lite'), 'lite' => __('Up to 3 rewrites, 3 headings, 3 FAQs per request', 'aeo-bob-lite')),
            array('icon' => '📡', 'title' => __('Full AI discovery', 'aeo-bob-lite'), 'description' => __('llms-full.txt, engine prompt files and Notify AI Models, served and kept up to date for you.', 'aeo-bob-lite'), 'lite' => __('Basic llms.txt (generated on request)', 'aeo-bob-lite')),
            array('icon' => '🤖', 'title' => __('5 AI providers', 'aeo-bob-lite'), 'description' => __('OpenAI, Anthropic (Claude), Google (Gemini), Perplexity and Zhipu AI (GLM).', 'aeo-bob-lite'), 'lite' => __('OpenAI only', 'aeo-bob-lite')),
            array('icon' => '🗣', 'title' => __('Fix Voice', 'aeo-bob-lite'), 'description' => __('Repairs posts whose point of view is inconsistent; changes only the voice, never the content.', 'aeo-bob-lite'), 'lite' => ''),
            array('icon' => '📊', 'title' => __('Score Dashboard', 'aeo-bob-lite'), 'description' => __('Every post\'s scores in one place, "Rescore all", and exclusions for single posts, categories and tags.', 'aeo-bob-lite'), 'lite' => __('Site averages on the dashboard', 'aeo-bob-lite')),
            array('icon' => '🔧', 'title' => __('Bulk operations', 'aeo-bob-lite'), 'description' => __('Rescore and optimize many posts at once.', 'aeo-bob-lite'), 'lite' => ''),
            array('icon' => '🧱', 'title' => __('Elementor floating panel', 'aeo-bob-lite'), 'description' => __('An AEO Bob panel that floats over the Elementor editor.', 'aeo-bob-lite'), 'lite' => __('A card in the Elementor widget panel', 'aeo-bob-lite')),
            array('icon' => '🔎', 'title' => __('Leaked-notes check', 'aeo-bob-lite'), 'description' => __('Finds AI reviewer notes and duplicated paragraphs left in your posts.', 'aeo-bob-lite'), 'lite' => ''),
            array('icon' => '✉️', 'title' => __('Priority email support', 'aeo-bob-lite'), 'description' => __('For AEO Bob Pro customers.', 'aeo-bob-lite'), 'lite' => ''),
        );
    }
}

/**
 * v1.5.81: one sentence on what Lite itself does with AI (shown next to the Pro list).
 */
if (!function_exists('aeo_bob_lite_ai_summary')) {
    function aeo_bob_lite_ai_summary() {
        return __('Lite already includes AI suggestions and apply with your own OpenAI key: up to 3 rewrites, 3 headings and 3 FAQs per request.', 'aeo-bob-lite');
    }
}

/**
 * v1.5.80: content-hashed version for a Lite asset (Pro 2.6.8 cache fix): the ?ver= changes
 * whenever the file changes, so a page cache or the browser never serves an old copy of a
 * script after an update.
 */
if (!function_exists('aeo_bob_lite_asset_ver')) {
    function aeo_bob_lite_asset_ver($relative_path) {
        $file = AEO_BOB_LITE_PATH . ltrim($relative_path, '/');
        $hash = is_readable($file) ? md5_file($file) : '';
        return AEO_BOB_LITE_VERSION . ($hash ? '.' . substr($hash, 0, 10) : '');
    }
}

/*
 * v1.5.79: cap stored scores at 100 on read (port of AEO Bob Pro 2.6.3 aeo_bob_cap_stored_score).
 * Lite shares _aeo_bob_aeo_score/_aeo_bob_seo_score with Pro, and Pro before 2.6.3 could store up
 * to 115. Pro deactivates Lite, so a site that goes back from Pro to Lite would show "108/100".
 * Every Lite screen reads the scores via get_post_meta(), so one read filter covers them all.
 */
if (!function_exists('aeo_bob_lite_cap_stored_score')) {
    function aeo_bob_lite_cap_stored_score($value, $object_id, $meta_key, $single) {
        if ($value !== null || !in_array($meta_key, array('_aeo_bob_aeo_score', '_aeo_bob_seo_score'), true)) {
            return $value;
        }
        remove_filter('get_post_metadata', 'aeo_bob_lite_cap_stored_score', 10);
        $raw = get_post_meta($object_id, $meta_key, $single);
        add_filter('get_post_metadata', 'aeo_bob_lite_cap_stored_score', 10, 4);

        $cap = function ($v) {
            return (is_numeric($v) && $v > 100) ? (is_string($v) ? '100' : 100) : $v;
        };
        // WP returns $check[0] for $single, so wrap the single value in an array.
        return $single ? array($cap($raw)) : array_map($cap, (array) $raw);
    }
    add_filter('get_post_metadata', 'aeo_bob_lite_cap_stored_score', 10, 4);
}

/**
 * Main AEO Bob Lite Class
 */
class AEO_Bob_Lite {

    /**
     * Single instance
     */
    private static $instance = null;

    /**
     * Get singleton instance
     */
    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Constructor
     */
    private function __construct() {
        $this->load_dependencies();
        $this->init_hooks();
    }

    /**
     * Load plugin dependencies
     */
    private function load_dependencies() {
        // Load Lite-specific classes
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-text.php';
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-openai.php';
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-settings.php';
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-optimizer.php';
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-admin.php';
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-post-columns.php';
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-meta-box.php';
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-elementor.php';
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-llms.php'; // v1.5.85
        require_once AEO_BOB_LITE_PATH . 'includes/class-aeo-bob-lite-schema.php'; // v1.5.92
    }

    /**
     * Initialize WordPress hooks
     */
    private function init_hooks() {
        // Admin initialization
        if (is_admin()) {
            add_action('admin_menu', array($this, 'add_admin_menu'));
            add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_assets'));

            // Initialize admin class (for AJAX handlers)
            AEO_Bob_Lite_Admin::get_instance();

            // Initialize post columns
            AEO_Bob_Lite_Post_Columns::get_instance();

            // Initialize meta box (includes both sidebar and main optimization panel)
            AEO_Bob_Lite_Meta_Box::get_instance();
        }

        // v1.5.85: rescore on every save - in ALL requests (the block editor saves through the REST
        // API, where is_admin() is false). Only queues; scoring runs once at shutdown, never on a
        // front-end page view.
        add_action('save_post', array('AEO_Bob_Lite_Admin', 'queue_rescore'), 20, 2);

        // v1.5.92: post schema (JSON-LD in the head, refreshed on save)
        AEO_Bob_Lite_Schema::get_instance();

        // Initialize Elementor integration (checks for Elementor internally)
        AEO_Bob_Lite_Elementor::get_instance();

        // Settings link on plugins page
        add_filter('plugin_action_links_' . plugin_basename(AEO_BOB_LITE_FILE), array($this, 'add_action_links'));
    }

    /**
     * Add admin menu
     */
    public function add_admin_menu() {
        add_menu_page(
            __('AEO Bob Lite', 'aeo-bob-lite'),
            __('AEO Bob', 'aeo-bob-lite'),
            'manage_options',
            'aeo-bob-lite',
            array($this, 'render_dashboard'),
            'dashicons-chart-line',
            30
        );

        add_submenu_page(
            'aeo-bob-lite',
            __('Dashboard', 'aeo-bob-lite'),
            __('Dashboard', 'aeo-bob-lite'),
            'manage_options',
            'aeo-bob-lite',
            array($this, 'render_dashboard')
        );

        add_submenu_page(
            'aeo-bob-lite',
            __('Settings', 'aeo-bob-lite'),
            __('Settings', 'aeo-bob-lite'),
            'manage_options',
            'aeo-bob-lite-settings',
            array($this, 'render_settings_page')
        );

        // v1.5.86: registered here with the other items (same hook, same moment, before Go Pro). In
        // 1.5.85 the llms.txt class added it from its own admin_menu callback at priority 11.
        add_submenu_page(
            'aeo-bob-lite',
            __('llms.txt', 'aeo-bob-lite'),
            __('llms.txt', 'aeo-bob-lite'),
            'manage_options',
            AEO_Bob_Lite_Llms::PAGE,
            array(AEO_Bob_Lite_Llms::get_instance(), 'render_page')
        );

        add_submenu_page(
            'aeo-bob-lite',
            __('Go Pro', 'aeo-bob-lite'),
            __( 'Go Pro', 'aeo-bob-lite' ),
            'manage_options',
            'aeo-bob-lite-upgrade',
            array($this, 'render_upgrade_page')
        );
    }

    /**
     * Render dashboard page
     */
    public function render_dashboard() {
        include AEO_BOB_LITE_PATH . 'admin/dashboard.php';
    }

    /**
     * Render settings page
     */
    public function render_settings_page() {
        $settings = AEO_Bob_Lite_Settings::get_instance();
        $settings->render_settings_page();
    }

    /**
     * Render upgrade page
     */
    public function render_upgrade_page() {
        include AEO_BOB_LITE_PATH . 'admin/upgrade.php';
    }

    /**
     * Enqueue admin assets
     */
    public function enqueue_admin_assets($hook) {
        // Only load on our pages and post list screens
        if (strpos($hook, 'aeo-bob-lite') === false && !in_array($hook, array('post.php', 'post-new.php', 'edit.php'))) {
            return;
        }

        // CSS
        wp_enqueue_style(
            'aeo-bob-lite-admin',
            AEO_BOB_LITE_URL . 'assets/css/admin.css',
            array(),
            aeo_bob_lite_asset_ver('assets/css/admin.css')
        );
        // v1.5.86: no admin.js - its handlers targeted buttons none of these pages have.
    }

    /**
     * Add action links on plugins page
     */
    public function add_action_links($links) {
        $custom_links = array(
            '<a href="' . esc_url(admin_url('admin.php?page=aeo-bob-lite')) . '">' . esc_html__('Dashboard', 'aeo-bob-lite') . '</a>',
            '<a href="' . esc_url(admin_url('admin.php?page=aeo-bob-lite-upgrade')) . '" class="aeo-bob-go-pro-link">' . esc_html__('Go Pro', 'aeo-bob-lite') . '</a>',
        );
        return array_merge($custom_links, $links);
    }
}

// Initialize plugin
function aeo_bob_lite() {
    return AEO_Bob_Lite::get_instance();
}

/**
 * Plugin activation callback
 */
function aeo_bob_lite_activate() {
    // v1.5.86: no database tables - Lite keeps everything in post meta and options (uninstall.php
    // still drops the aeo_bob_* tables older versions created).

    // Set default options
    add_option('aeo_bob_lite_version', AEO_BOB_LITE_VERSION);
    add_option('aeo_bob_lite_installed', time());

    // Flush rewrite rules
    flush_rewrite_rules();
}

/**
 * Plugin deactivation callback
 */
function aeo_bob_lite_deactivate() {
    // Clean up (but don't delete data)
    flush_rewrite_rules();
}

// Register activation/deactivation hooks (BEFORE plugin starts)
register_activation_hook(__FILE__, 'aeo_bob_lite_activate');
register_deactivation_hook(__FILE__, 'aeo_bob_lite_deactivate');

// Start the plugin
aeo_bob_lite();