<?php
/**
 * The admin-specific functionality of the plugin.
 *
 * @package AIDD
 */

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

/**
 * Admin functionality.
 */
class AIDD_Admin {

	/**
	 * Add admin menu page.
	 */
	public function add_admin_menu() {
		add_options_page(
			__( 'AI Domain Data', 'ai-domain-data' ),
			__( 'AI Domain Data', 'ai-domain-data' ),
			'manage_options',
			'ai-domain-data',
			array( $this, 'display_admin_page' )
		);
	}

	/**
	 * Register plugin settings.
	 */
	public function register_settings() {
		// Required fields.
		register_setting( 'aidd_settings', 'aidd_name', array( 'sanitize_callback' => 'sanitize_text_field' ) );
		register_setting( 'aidd_settings', 'aidd_description', array( 'sanitize_callback' => 'sanitize_textarea_field' ) );
		register_setting( 'aidd_settings', 'aidd_website', array( 'sanitize_callback' => 'esc_url_raw' ) );
		register_setting( 'aidd_settings', 'aidd_contact', array( 'sanitize_callback' => 'sanitize_text_field' ) );

		// Optional fields.
		register_setting( 'aidd_settings', 'aidd_logo', array( 'sanitize_callback' => 'esc_url_raw' ) );
		register_setting( 'aidd_settings', 'aidd_entity_type', array( 'sanitize_callback' => 'sanitize_text_field' ) );
		register_setting( 'aidd_settings', 'aidd_jsonld', array( 'sanitize_callback' => array( $this, 'sanitize_jsonld' ) ) );
	}

	/**
	 * Sanitize JSON-LD field.
	 *
	 * @param string $value JSON string.
	 * @return string
	 */
	public function sanitize_jsonld( $value ) {
		if ( empty( $value ) ) {
			return '';
		}

		// Try to decode and re-encode to validate JSON.
		$decoded = json_decode( $value, true );
		if ( json_last_error() === JSON_ERROR_NONE ) {
			return wp_json_encode( $decoded );
		}

		return '';
	}

	/**
	 * Enqueue admin styles.
	 *
	 * @param string $hook Current admin page hook.
	 */
	public function enqueue_styles( $hook ) {
		if ( 'settings_page_ai-domain-data' !== $hook ) {
			return;
		}

		wp_enqueue_style(
			'ai-domain-data-admin',
			AIDD_PLUGIN_URL . 'admin/css/admin.css',
			array(),
			AIDD_VERSION
		);
	}

	/**
	 * Display admin settings page.
	 */
	public function display_admin_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		// Generate profile for preview.
		$profile = AIDD_Generator::generate();
		$validation = AIDD_Validator::validate( $profile );
		$endpoint_url = home_url( '/.well-known/domain-profile.json' );

		include AIDD_PLUGIN_DIR . 'admin/views/settings-page.php';
	}
}