using UIShare.GlobalVariable;
using Logger;
using Prism.Mvvm;
using System.Collections.ObjectModel;
using System.Reflection;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Threading;
using UIShare.ViewModelBase;

namespace TestingModule.ViewModels
{
    public class LogAreaViewModel : NavigateViewModelBase, IDisposable
    {
        // 日志集合
        private ObservableCollection<LogItem> _logs = new();

        public ObservableCollection<LogItem> Logs
        {
            get => _logs;
            set => SetProperty(ref _logs, value);
        }
        public ICommand ClearLogCommand { get; set; }

        public LogAreaViewModel(IContainerProvider containerProvider) : base(containerProvider)
        {
            ClearLogCommand = new DelegateCommand(ClearLog);

            // 2. 保持原有逻辑，但请确保在 Dispose 中对其进行清理
            LoggerHelper.Progress = new System.Progress<(string message, string color, int depth)>(
               log =>
               {
                   // 增加防御性代码：防止进入销毁流程时异步回调引发空引用异常
                   if (Logs == null) return;

                   var brush = (Brush)new BrushConverter().ConvertFromString(log.color);
                   Logs.Add(new LogItem(log.message, brush, log.depth));
               });
        }

        private void ClearLog()
        {
            Logs?.Clear();
        }

        /// <summary>
        /// 完善后的资源释放方法
        /// </summary>
        public void Dispose()
        {
            try
            {
                LoggerHelper.Progress = null!;
                if (Logs != null)
                {
                    Logs.Clear();
                    Logs = null!; 
                }
            }
            catch (Exception ex)
            {
                Logger.LoggerHelper.ErrorWithNotify($"释放日志组件（LogAreaViewModel）资源失败: {ex.Message}");
            }
        }
    }

    // 日志条目类
    public class LogItem
    {
        public string Message { get; set; }
        public Brush Color { get; set; } = Brushes.Black;
        public int Depth { get; set; } 
        public LogItem(string message, Brush color, int depth = 0)
        {
            Message = new string(' ', depth * 20) + message;
            Color = color;
            Depth = depth;
        }
    }
}