using _29WxOrderWpf.Commands;
using _29WxOrderWpf.Services;
using AllBase.Model.MvvmBaseClasses;
using AllBase.Util;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Timers;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;
using Work.KJDServer.API.Models;
using WPFCommon.Models;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.TaskbarClock;

namespace _29WxOrderWpf.Ctrls.OrderCtrls;

/// <summary>
/// OrderTaskDialogView.xaml 的交互逻辑
/// </summary>
public partial class OrderTaskDialogView : UserControl
{
	private readonly OrderTaskDialogViewModel _viewModel;

	public OrderTaskDialogView()
	{
		InitializeComponent();
		this.Loaded += OrderTaskDialogView_Loaded;
		_viewModel = new OrderTaskDialogViewModel();
		DataContext = _viewModel;
	}

	private async void OrderTaskDialogView_Loaded(object sender, RoutedEventArgs e)
	{
		await _viewModel.LoadTasks();
	}
}

/// <summary>
/// 任务列表 - ViewModel
/// </summary>
public class OrderTaskDialogViewModel : BindableBaseEx, IDisposable
{
	private DispatcherTimer _timer;
	private const int RefreshIntervals = 10;
	private int _timeCount = 0;
	private readonly PullWXOrderService _service;
	private readonly NotifyCollectionChangedEventHandler _collectionChangedHandler;


	public OrderTaskDialogViewModel()
		: this(PullWXOrderService.Instance)
	{
		_timer = new DispatcherTimer();
		_timer.Interval = TimeSpan.FromSeconds(1);
		_timer.Tick += _timer_Tick;
		_timer.Start();
	}

	private async void _timer_Tick(object sender, EventArgs e)
	{
		_timeCount++;
		if (_timeCount % RefreshIntervals == 0)
		{
			await LoadTasks();
			_timeCount = 0;
		}
		RefreshTime = RefreshIntervals - _timeCount;
	}

	public OrderTaskDialogViewModel(PullWXOrderService service)
	{
		_service = service ?? PullWXOrderService.Instance;
		Tasks = _service.Tasks;
		_collectionChangedHandler = OnTasksCollectionChanged;
		Tasks.CollectionChanged += _collectionChangedHandler;


		ClearFinishedCommand = new DelegateCommand(ClearFinished);
		ClearAllCommand = new DelegateCommand(ClearAll);

		UpdateSummary();

		TasksView = CollectionViewSource.GetDefaultView(Tasks);
		TasksView.Filter = FilterTaskStatus;
	}

	public async Task LoadTasks()
	{
		await _service.GetTaskStatus();
	}
	private bool FilterTaskStatus(object obj)
	{
		if (obj is not OrderTask task)
			return false;

		if (IsShowAll == true)
			return true;

		return task.Status !=2;
	}

	/// <summary>任务列表</summary>
	public ObservableCollection<OrderTask> Tasks { get; }

	public ICollectionView TasksView { get; }

	/// <summary>清空已完成/失败任务</summary>
	public ICommand ClearFinishedCommand { get; }

	/// <summary>清空全部任务</summary>
	public ICommand ClearAllCommand { get; }

	/// <summary>汇总文字（总数/执行中/成功/失败）</summary>
	public string SummaryText
	{
		get => GetValue<string>();
		set => SetValue(value);
	}
	public int RefreshTime
	{
		get => GetValue<int>();
		set => SetValue(value);
	}
	public bool IsShowAll
	{
		get => GetValue<bool>();
		set
		{
			SetValue(value);
			TasksView.Refresh();
		}
	}

	private void ClearFinished()
	{
		_service.ClearFinished();
	}

	private void ClearAll()
	{
		if (System.Windows.MessageBox.Show("确定清空全部任务吗？", "提示", MessageBoxButton.OKCancel, MessageBoxImage.Question) != MessageBoxResult.OK)
			return;
		_service.ClearAll();
	}

	private void OnTasksCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
	{
		UpdateSummary();
	}

	private void OnTaskPropertyChanged(object sender, PropertyChangedEventArgs e)
	{
		if (e.PropertyName == nameof(OrderTask.Status))
			UpdateSummary();
	}

	private void UpdateSummary()
	{
		var items = Tasks;
		//int running = items.Count(t => t.Status == OrderTask.Running);
		//int success = items.Count(t => t.Status == OrderTask.Success);
		//int failed = items.Count(t => t.Status == OrderTask.Failed);
		//string.Format("任务总数：{0}    执行中：{1}    成功：{2}    失败：{3}",
		//items.Length, running, success, failed);
	}

	public void Dispose()
	{
		_timer.Stop();
		_timer = null;
	}
}