<?php
/**
 * Base REST API Controller for the plugin.
 *
 * This class handles base REST API functionality, including authentication
 * and permissions.
 *
 * @package    QDR_Temporary_Shared_Storage
 * @since      1.0.0
 */
class QDR_TSS_REST_Controller {

    /**
     * The plugin name.
     *
     * @since    1.0.0
     * @access   private
     * @var      string    $plugin_name    The name of this plugin.
     */
    private $plugin_name;

    /**
     * The plugin version.
     *
     * @since    1.0.0
     * @access   private
     * @var      string    $version    The version of this plugin.
     */
    private $version;

    /**
     * The settings instance.
     *
     * @since    1.0.0
     * @access   private
     * @var      QDR_TSS_Settings    $settings    The settings instance.
     */
    private $settings;

    /**
     * Initialize the class and set its properties.
     *
     * @since    1.0.0
     * @param    string    $plugin_name    The name of this plugin.
     * @param    string    $version        The version of this plugin.
     */
    public function __construct($plugin_name, $version) {
        $this->plugin_name = $plugin_name;
        $this->version = $version;
        $this->settings = QDR_TSS_Settings::instance();
    }

    /**
     * Register the REST API routes.
     *
     * @since    1.0.0
     */
    public function register_routes() {
        // Media Controller
        $media_controller = new QDR_TSS_Media_Controller($this->plugin_name, $this->version);
        $media_controller->register_routes();
        
        // Upload Controller
        $upload_controller = new QDR_TSS_Upload_Controller($this->plugin_name, $this->version);
        $upload_controller->register_routes();
    }

    /**
     * Check API key for REST API requests.
     *
     * @since    1.0.0
     * @param    WP_Error|null    $result    The authentication result so far.
     * @return   WP_Error|null               The authentication result.
     */
    public function check_api_key($result) {
        // Only check for our namespace
        if (empty($result) && strpos($_SERVER['REQUEST_URI'], '/wp-json/qdr-tss/') !== false) {
            $headers = $this->get_all_headers();
            $api_key = isset($headers['X-Api-Key']) ? $headers['X-Api-Key'] : '';
            
            if (!$this->settings->validate_api_key($api_key)) {
                return new WP_Error(
                    'rest_forbidden',
                    __('Invalid API key.', 'qdr-temporary-shared-storage'),
                    array('status' => 403)
                );
            }
        }
        
        return $result;
    }

    /**
     * Check REST API permissions.
     *
     * @since    1.0.0
     * @return   bool    True if authorized, false otherwise.
     */
    public function check_rest_permission() {
        $headers = $this->get_all_headers();
        $api_key = isset($headers['X-Api-Key']) ? $headers['X-Api-Key'] : '';
        
        return $this->settings->validate_api_key($api_key);
    }

    /**
     * Get all headers.
     *
     * @since    1.0.0
     * @return   array    All headers.
     */
    private function get_all_headers() {
        if (function_exists('getallheaders')) {
            return getallheaders();
        }
        
        // Manually get headers if getallheaders() is not available
        $headers = array();
        foreach ($_SERVER as $name => $value) {
            if (substr($name, 0, 5) === 'HTTP_') {
                $name = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))));
                $headers[$name] = $value;
            } elseif ($name === 'CONTENT_TYPE') {
                $headers['Content-Type'] = $value;
            } elseif ($name === 'CONTENT_LENGTH') {
                $headers['Content-Length'] = $value;
            }
        }
        
        return $headers;
    }
}