<?php
namespace artbees\QuickView\Http;

use artbees\QuickView\Contracts\SettingsRepository;
use artbees\QuickView\Contracts\SettingsSchema;

if ( ! defined( 'ABSPATH' ) ) { exit; }

/** Owns the authenticated, complete-document settings and isolated preview routes. */
final class SettingsController {
	private $repository;
	private $schema;

	public function __construct( SettingsRepository $repository, SettingsSchema $schema ) {
		$this->repository = $repository;
		$this->schema = $schema;
	}

	public function register() { add_action( 'rest_api_init', array( $this, 'routes' ) ); }

	public function routes() {
		register_rest_route( 'artbees-quick-view/v1', '/settings', array(
			array( 'methods' => 'GET', 'callback' => array( $this, 'get' ), 'permission_callback' => array( $this, 'permission' ) ),
			array( 'methods' => 'PUT', 'callback' => array( $this, 'update' ), 'permission_callback' => array( $this, 'permission' ) ),
		) );
		register_rest_route( 'artbees-quick-view/v1', '/preview', array(
			'methods' => 'POST', 'callback' => array( $this, 'preview' ), 'permission_callback' => array( $this, 'permission' ),
		) );
	}

	public function permission( $request ) {
		$nonce = $request->get_header( 'X-WP-Nonce' );
		return current_user_can( 'manage_woocommerce' ) && is_string( $nonce ) && wp_verify_nonce( $nonce, 'wp_rest' );
	}

	public function get() {
		return rest_ensure_response( array( 'settings' => $this->repository->get(), 'version' => (int) get_option( \artbees\QuickView\Storage\SettingsRepository::VERSION_OPTION, 0 ) ) );
	}

	public function update( $request ) {
		$params = $request->get_json_params();
		$settings = is_array( $params ) && isset( $params['settings'] ) && is_array( $params['settings'] ) ? $params['settings'] : array();
		$expected = is_array( $params ) && isset( $params['version'] ) ? absint( $params['version'] ) : -1;
		$current = (int) get_option( \artbees\QuickView\Storage\SettingsRepository::VERSION_OPTION, 0 );
		if ( $expected !== $current ) { return new \WP_Error( 'artbees_qv_settings_conflict', __( 'These settings changed in another tab. Reload the page and try again.', 'artbees-quick-view' ), array( 'status' => 409 ) ); }
		$validation = $this->schema->validate( $settings );
		if ( ! $validation->is_valid() ) { return new \WP_Error( 'artbees_qv_invalid_settings', __( 'Check the highlighted settings and try again.', 'artbees-quick-view' ), array( 'status' => 400, 'errors' => $validation->errors() ) ); }
		if ( ! $this->repository->replace( $settings ) ) { return new \WP_Error( 'artbees_qv_settings_save_failed', __( 'Settings could not be saved. Your previous settings are still in place.', 'artbees-quick-view' ), array( 'status' => 500 ) ); }
		return $this->get();
	}

	public function preview( $request ) {
		return \artbees\QuickView\Http\ProductController::preview_response( $request );
	}
}