using System;
using System.Reflection;
using System.Windows;
using TeamAAS.Communication.Attributes;
using TeamAAS.Communication.Interfaces;

namespace TeamAAS.Communication.UI
{
    /// <summary>
    /// 通讯设备调试页工厂：按设备类型上的 [Communication] 特性选择品牌专属调试页，
    /// 未指定 DebugPageType 时回退到默认调试页(DefaultCommunicationDebugPage，本库内)。
    /// 创建成功后自动把设备实例绑定给实现了 ICommunicationDebugPage 的页面。永不返回 null。
    /// </summary>
    public static class CommunicationDebugPageFactory
    {
        public static FrameworkElement Create(ICommunication communication)
        {
            Type pageType = typeof(DefaultCommunicationDebugPage);

            if (communication != null)
            {
                var attr = communication.GetType().GetCustomAttribute<CommunicationAttribute>(inherit: true);
                if (attr != null && attr.DebugPageType != null && typeof(FrameworkElement).IsAssignableFrom(attr.DebugPageType))
                    pageType = attr.DebugPageType;
            }

            FrameworkElement page = null;
            try
            {
                page = Activator.CreateInstance(pageType) as FrameworkElement;
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"创建通讯调试页 {pageType.Name} 失败: {ex.Message}");
            }

            if (page == null) page = new DefaultCommunicationDebugPage();

            if (communication != null && page is ICommunicationDebugPage)
                ((ICommunicationDebugPage)page).BindCommunication(communication);

            return page;
        }
    }
}