#pragma once

#include <expected>
#include <string>

#include <boost/json/value.hpp>

#include <modulus.hpp>

#include <vamp_protocol/page_control.hpp>
#include <vamp_zero/types.hpp>


namespace vamp_zero {

auto apply_app_command(vamp_zero::app_state state, vamp_protocol::page_command command) -> vamp_zero::app_state;
auto app_status_json(vamp_zero::app_state const &state) -> boost::json::value;
auto remote_display_text(vamp_zero::app_state const &state) -> std::string;
auto validate_app_state(vamp_zero::app_state const &state) -> std::expected<void, modulus::error>;

}