<?php
/**
 * Plugin Name: WP to HTML
 * Plugin URI: https://welldressedwalrus.com/
 * Description: Converts WordPress pages and posts to static HTML files for faster loading. Supports exclusion rules for dynamic pages like forms.
 * Version: 0.3.0
 * Author: Jeffrey Long @ Well Dressed Walrus
 * Author URI: https://welldressedwalrus.com
 * License: GPL v2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: wp-to-html
 */

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

// Plugin constants
define('WP_TO_HTML_VERSION', '0.3.0');
define('WP_TO_HTML_PLUGIN_DIR', plugin_dir_path(__FILE__));
define('WP_TO_HTML_PLUGIN_URL', plugin_dir_url(__FILE__));
define('WP_TO_HTML_CACHE_DIR', WP_CONTENT_DIR . '/cache/wp-to-html/');
define('WP_TO_HTML_CACHE_URL', content_url('/cache/wp-to-html/'));

/**
 * Main plugin class
 */
class WP_To_HTML {
    
    /**
     * Single instance of the class
     */
    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 required class files
     */
    private function load_dependencies() {
        require_once WP_TO_HTML_PLUGIN_DIR . 'includes/class-generator.php';
        require_once WP_TO_HTML_PLUGIN_DIR . 'includes/class-server.php';
        require_once WP_TO_HTML_PLUGIN_DIR . 'includes/class-hooks.php';
        require_once WP_TO_HTML_PLUGIN_DIR . 'includes/class-admin.php';
        require_once WP_TO_HTML_PLUGIN_DIR . 'includes/class-bulk.php';
        require_once WP_TO_HTML_PLUGIN_DIR . 'includes/class-cron.php';
        require_once WP_TO_HTML_PLUGIN_DIR . 'includes/class-assets.php';
    }
    
    /**
     * Initialize WordPress hooks
     */
    private function init_hooks() {
        // Initialize components
        add_action('init', array($this, 'init_components'));
        
        // Register activation/deactivation hooks
        register_activation_hook(__FILE__, array($this, 'activate'));
        register_deactivation_hook(__FILE__, array($this, 'deactivate'));
    }
    
    /**
     * Initialize plugin components
     */
    public function init_components() {
        WP_To_HTML_Generator::get_instance();
        WP_To_HTML_Server::get_instance();
        WP_To_HTML_Hooks::get_instance();
        WP_To_HTML_Cron::get_instance();
        
        if (is_admin()) {
            WP_To_HTML_Admin::get_instance();
            WP_To_HTML_Bulk::get_instance();
        }
    }
    
    /**
     * Plugin activation
     */
    public function activate() {
        // Create cache directory
        if (!file_exists(WP_TO_HTML_CACHE_DIR)) {
            wp_mkdir_p(WP_TO_HTML_CACHE_DIR);
        }
        
        // Create metadata directory
        $metadata_dir = WP_TO_HTML_CACHE_DIR . '.metadata/';
        if (!file_exists($metadata_dir)) {
            wp_mkdir_p($metadata_dir);
        }
        
        // Add index.php to cache directory for security
        $index_content = "<?php\n// Silence is golden.";
        if (!file_exists(WP_TO_HTML_CACHE_DIR . 'index.php')) {
            file_put_contents(WP_TO_HTML_CACHE_DIR . 'index.php', $index_content);
        }
        
        // Set default options
        $default_options = array(
            'enabled' => true,
            'excluded_shortcodes' => 'contact-form-7,wpforms,gravityform,ninja_forms,formidable,wpcf7',
            'excluded_blocks' => 'wpforms,gravityforms,contact-form-7,ninja-forms,formidable,forminator,ws-form,fluentform,everest-forms',
            'bundle_css' => true,
            'bundle_js' => true,
        );
        
        if (!get_option('wp_to_html_settings')) {
            add_option('wp_to_html_settings', $default_options);
        }
        
        // Add htaccess rules
        $this->add_htaccess_rules();
        
        // Schedule cron event
        WP_To_HTML_Cron::schedule_cron();
        
        // Flush rewrite rules
        flush_rewrite_rules();
    }
    
    /**
     * Plugin deactivation
     */
    public function deactivate() {
        // Remove htaccess rules
        $this->remove_htaccess_rules();
        
        // Unschedule cron event
        WP_To_HTML_Cron::unschedule_cron();
        
        // Flush rewrite rules
        flush_rewrite_rules();
        
        // Note: We don't delete the cache directory on deactivation
        // to preserve cached files in case of accidental deactivation
    }
    
    /**
     * Add htaccess rules for serving static HTML
     */
    private function add_htaccess_rules() {
        $htaccess_file = ABSPATH . '.htaccess';
        
        if (!is_writable($htaccess_file)) {
            return false;
        }
        
        $htaccess_content = file_get_contents($htaccess_file);
        
        // Check if rules already exist
        if (strpos($htaccess_content, '# BEGIN WP-to-HTML') !== false) {
            return true;
        }
        
        $rules = $this->get_htaccess_rules();
        
        // Add rules before WordPress rules
        $wp_marker = '# BEGIN WordPress';
        if (strpos($htaccess_content, $wp_marker) !== false) {
            $htaccess_content = str_replace($wp_marker, $rules . "\n\n" . $wp_marker, $htaccess_content);
        } else {
            $htaccess_content = $rules . "\n\n" . $htaccess_content;
        }
        
        return file_put_contents($htaccess_file, $htaccess_content);
    }
    
    /**
     * Remove htaccess rules
     */
    private function remove_htaccess_rules() {
        $htaccess_file = ABSPATH . '.htaccess';
        
        if (!is_writable($htaccess_file)) {
            return false;
        }
        
        $htaccess_content = file_get_contents($htaccess_file);
        
        // Remove our rules block
        $pattern = '/# BEGIN WP-to-HTML.*?# END WP-to-HTML\s*/s';
        $htaccess_content = preg_replace($pattern, '', $htaccess_content);
        
        return file_put_contents($htaccess_file, $htaccess_content);
    }
    
    /**
     * Get htaccess rules
     */
    public function get_htaccess_rules() {
        $cache_path = str_replace(ABSPATH, '/', WP_TO_HTML_CACHE_DIR);
        
        $rules = "# BEGIN WP-to-HTML\n";
        $rules .= "<IfModule mod_rewrite.c>\n";
        $rules .= "RewriteEngine On\n";
        $rules .= "RewriteBase /\n\n";
        
        // Skip for logged-in users (WordPress login cookies)
        $rules .= "# Skip for logged-in users\n";
        $rules .= "RewriteCond %{HTTP_COOKIE} !wordpress_logged_in [NC]\n\n";
        
        // Skip for POST requests
        $rules .= "# Skip for POST requests\n";
        $rules .= "RewriteCond %{REQUEST_METHOD} !POST\n\n";
        
        // Skip for query strings
        $rules .= "# Skip for requests with query strings\n";
        $rules .= "RewriteCond %{QUERY_STRING} ^$\n\n";
        
        // Check if static file exists and serve it
        $rules .= "# Check if cached HTML exists and serve it\n";
        $rules .= "RewriteCond %{DOCUMENT_ROOT}" . $cache_path . "%{REQUEST_URI}index.html -f\n";
        $rules .= "RewriteRule ^(.*)$ " . $cache_path . "%{REQUEST_URI}index.html [L]\n";
        
        $rules .= "</IfModule>\n";
        $rules .= "# END WP-to-HTML";
        
        return $rules;
    }
    
    /**
     * Get plugin settings
     */
    public static function get_settings() {
        $defaults = array(
            'enabled' => true,
            'excluded_shortcodes' => 'contact-form-7,wpforms,gravityform,ninja_forms,formidable,wpcf7',
            'excluded_blocks' => 'wpforms,gravityforms,contact-form-7,ninja-forms,formidable,forminator,ws-form,fluentform,everest-forms',
            'cron_interval' => 'wp_to_html_hourly',
            'bundle_css' => true,
            'bundle_js' => true,
        );
        
        $settings = get_option('wp_to_html_settings', $defaults);
        
        return wp_parse_args($settings, $defaults);
    }
}

// Initialize the plugin
function wp_to_html_init() {
    return WP_To_HTML::get_instance();
}

// Start the plugin
add_action('plugins_loaded', 'wp_to_html_init');

// Add settings link on plugin page
function wp_to_html_plugin_action_links($links) {
    $settings_link = '<a href="' . admin_url('options-general.php?page=wp-to-html') . '">' . __('Settings', 'wp-to-html') . '</a>';
    array_unshift($links, $settings_link);
    return $links;
}
add_filter('plugin_action_links_' . plugin_basename(__FILE__), 'wp_to_html_plugin_action_links');