using Avalonia;
using Avalonia.Threading;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Cowain.Base.Helpers;
using Irihi.Avalonia.Shared.Contracts;
using Newtonsoft.Json;
using Plugin.Cowain.Wcs.IServices;
using Plugin.Cowain.Wcs.Models.Enum;
using Plugin.Cowain.Wcs.ViewModels.ProcessGraph;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Windows.Input;

namespace Plugin.Cowain.Wcs.ViewModels;

public partial class ProcessEditDialogViewModel : ObservableObject, IDialogContext
{
    private class FlowDataDto
    {
        public List<StationNodeViewModel> Nodes { get; set; } = new();
        public List<ConnectionViewModel> Connections { get; set; } = new();
    }


    public NodifyObservableCollection<StationNodeViewModel> Nodes { get; } = new NodifyObservableCollection<StationNodeViewModel>();
    public NodifyObservableCollection<ConnectionViewModel> Connections { get; } = new();

    public PendingConnectionViewModel PendingConnection { get; }

    public event EventHandler<object?>? RequestClose;
    [ObservableProperty]
    private StationNodeViewModel? _selectedNode;

    [ObservableProperty]
    private ObservableCollection<StationNodeViewModel> _selectedNodes = new ObservableCollection<StationNodeViewModel>();


    [ObservableProperty]
    private ConnectionViewModel? _selectedConnection;



    [ObservableProperty]
    private ObservableCollection<ConnectionViewModel> _selectedConnections = new ObservableCollection<ConnectionViewModel>();

    public List<StationViewModel>? Stations { get; }

    private ProcessViewModel? _process;
    public ICommand DeleteSelectionCommand { get; }
    public static List<string> ActionList =>
        Enum.GetNames(typeof(RgvCommandEnum)).ToList(); // 直接获取枚举名称字符串列表

    public static List<string> StationStateList =>
    Enum.GetNames(typeof(StationStateEnum)).ToList(); // 直接获取枚举名称字符串列表
    private List<string> actions = new List<string>() { RgvCommandEnum.MoveFrom.ToString(), RgvCommandEnum.Pick.ToString(), RgvCommandEnum.MoveTo.ToString(), RgvCommandEnum.Place.ToString() };


    private IProcessFlowService _processFlowService;
    public ProcessEditDialogViewModel(List<StationViewModel>? stations, ProcessViewModel? process, IProcessFlowService processFlowService)
    {
        Stations = stations;
        _process = process;
        _processFlowService = processFlowService;
        PendingConnection = new PendingConnectionViewModel(this);
        DeleteSelectionCommand = new RelayCommand(DeleteSelection, () => SelectedNodes.Count > 0 || SelectedConnections.Count > 0);
        GlobalData.Instance.AddOrUpdate("Stations", Stations);
        Nodes.WhenRemoved(x => DisconnectStation(x))
              .WhenCleared(x =>
              {
                  Connections.Clear();
              });
        DispatcherTimer.RunOnce((async () =>
        {
            await InitFlowDataAsync();
        }), TimeSpan.FromSeconds(0), DispatcherPriority.Default);

    }

    /// <summary>
    /// 删除工站同时，删除与之相关的连接
    /// </summary>
    /// <param name="state"></param>
    public void DisconnectStation(StationNodeViewModel state)
    {
        var transitions = Connections.Where(t => t.Source.NodeId == state.Id || t.Target.NodeId == state.Id).ToList();
        transitions.ForEach(t => Connections.Remove(t));
    }

    public void Connect(ConnectorViewModel source, ConnectorViewModel target)
    {
        var conn = new ConnectionViewModel(source, target);
        Connections.Add(conn);
    }

    private async Task InitFlowDataAsync()
    {
        if (_process == null || string.IsNullOrWhiteSpace(_process.FlowData))
            return;

        try
        {
            var flow = JsonConvert.DeserializeObject<FlowDataDto>(_process.FlowData);
            if (flow != null)
            {
                Nodes.Clear();
                foreach (var node in flow.Nodes)
                {
                    Nodes.Add(node);
                }
                var flows = await _processFlowService.GetAllAsync();
                var existingFlows = flows.Where(f => f.ProcessId == _process.Id);
                Connections.Clear();
                foreach (var conn in flow.Connections)
                {
                    // 根据 Source 和 Target 的 StationId 找到 Nodes 中对应的 ConnectorViewModel
                    var sourceNode = Nodes.FirstOrDefault(n => n.Id == conn.Source.NodeId);
                    var targetNode = Nodes.FirstOrDefault(n => n.Id == conn.Target.NodeId);

                    if (sourceNode != null && targetNode != null)
                    {
                        // 这里假设连接都是 Output -> Input
                        var newConn = new ConnectionViewModel(sourceNode.Output, targetNode.Input);
                        newConn.ProcessFlow = conn.ProcessFlow;

                        var existFlow = existingFlows.FirstOrDefault(f =>
                            f.FromStationId1 == newConn.ProcessFlow.FromStationId1 &&
                            f.ToStationId1 == newConn.ProcessFlow.ToStationId1 &&
                            f.FromStationId2 == newConn.ProcessFlow.FromStationId2 &&
                            f.ToStationId2 == newConn.ProcessFlow.ToStationId2);

                        if (existFlow != null)
                        {
                            // 更新已有流程
                            newConn.ProcessFlow.Id = existFlow.Id;
                            newConn.ProcessFlow.FromStatus1 = existFlow.FromStatus1;
                            newConn.ProcessFlow.ToStatus1 = existFlow.ToStatus1;
                            newConn.ProcessFlow.FromStatus2 = existFlow.FromStatus2;
                            newConn.ProcessFlow.ToStatus2 = existFlow.ToStatus2;
                            newConn.ProcessFlow.Priority = existFlow.Priority;
                        }

                        Connections.Add(newConn);
                    }
                }

            }

        }
        catch (Exception ex)
        {
            // 可根据需要添加日志或通知
            Debug.WriteLine($"InitFlowData 反序列化失败: {ex.Message}");
        }
    }



    private void DeleteSelection()
    {
        foreach (var connection in SelectedConnections.ToList())
        {
            connection.Source.IsConnected = false;
            connection.Target.IsConnected = false;
            Connections.Remove(connection);
        }

        var selected = SelectedNodes.ToList();

        for (int i = 0; i < selected.Count; i++)
        {
            Nodes.Remove(selected[i]);
        }
    }

    [RelayCommand]
    private void AddStation(Point point)
    {
        Nodes.Add(new StationNodeViewModel { Location = point });
    }

    public void Close()
    {
        RequestClose?.Invoke(this, false);
    }


    [RelayCommand]
    private void Ok()
    {
        if (_process != null)
        {
            foreach (var conn in Connections)
            {
                // 设置工艺流转的起止工站ID
                if (conn.ProcessFlow != null)
                {
                    conn.ProcessFlow.FromStationId1 = conn.Source.NodeId == Guid.Empty ? 0 : Nodes.FirstOrDefault(n => n.Id == conn.Source.NodeId)?.Station1Id ?? 0;
                    conn.ProcessFlow.ToStationId1 = conn.Target.NodeId == Guid.Empty ? 0 : Nodes.FirstOrDefault(n => n.Id == conn.Target.NodeId)?.Station1Id ?? 0;
                    conn.ProcessFlow.FromStationId2 = conn.Source.NodeId == Guid.Empty ? 0 : Nodes.FirstOrDefault(n => n.Id == conn.Source.NodeId)?.Station2Id ?? 0;
                    conn.ProcessFlow.ToStationId2 = conn.Target.NodeId == Guid.Empty ? 0 : Nodes.FirstOrDefault(n => n.Id == conn.Target.NodeId)?.Station2Id ?? 0;
                    if (conn.ProcessFlow.FromStationId2 == 0)
                    {
                        conn.ProcessFlow.FromStatus2 = StationStateEnum.UnKnown.ToString();
                    }
                    if (conn.ProcessFlow.ToStationId2 == 0)
                    {
                        conn.ProcessFlow.ToStatus2 = StationStateEnum.UnKnown.ToString();
                    }
                    conn.ProcessFlow.Action = JsonConvert.SerializeObject(actions);
                    conn.ProcessFlow.ProcessId = _process.Id;
                }
            }

            var flow = new FlowDataDto
            {
                Nodes = Nodes.ToList(),
                Connections = Connections.ToList()
            };
            _process.FlowData = JsonConvert.SerializeObject(flow);

        }
        RequestClose?.Invoke(this, true);
    }
    [RelayCommand]
    private void Cancel()
    {
        RequestClose?.Invoke(this, false);
    }

}