using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using DMS.WPF.Models;
using DMS.WPF.Services;
using DMS.Core.Helper;
using DMS.Infrastructure.Data;
using DMS.Infrastructure.Repositories;

using Microsoft.Extensions.DependencyInjection;
using DMS.Services;

namespace DMS.WPF.ViewModels;

public partial class DeviceDetailViewModel : ViewModelBase
{
    private readonly IDialogService _dialogService;
    private readonly VarTableRepository _varTableRepository;
    private readonly MenuRepository _menuRepository;
    private readonly DataServices _dataServices;

    [ObservableProperty]
    private Device _currentDevice;

    [ObservableProperty]
    private VariableTable _selectedVariableTable;

    public DeviceDetailViewModel(IDialogService dialogService, VarTableRepository varTableRepository,
                                 MenuRepository menuRepository, DataServices dataServices)
    {
        _dialogService = dialogService;
        _varTableRepository = varTableRepository;
        _menuRepository = menuRepository;
        _dataServices = dataServices;
    }

    public override void OnLoaded()
    {
        // Ensure VariableTables is an ObservableCollection for UI binding
        // if (_curentDevice.VariableTables != null &&
        //     !(_curentDevice.VariableTables is ObservableCollection<VariableTable>))
        // {
        //     _curentDevice.VariableTables = new ObservableCollection<VariableTable>(_curentDevice.VariableTables);
        // }
        // else if (_curentDevice.VariableTables == null)
        // {
        //     _curentDevice.VariableTables = new ObservableCollection<VariableTable>();
        // }
    }

    [RelayCommand]
    private async Task AddVariableTable()
    {
        using var db = DbContext.GetInstance();
        try
        {
            // 1. Show dialog to get new variable table details
            var newVarTable = await _dialogService.ShowAddVarTableDialog();
            if (newVarTable == null) return; // User cancelled

            // 2. Set properties for the new variable table
            newVarTable.DeviceId = CurrentDevice.Id;
            newVarTable.ProtocolType = CurrentDevice.ProtocolType;
            newVarTable.IsActive = true;

            // 3. Find the parent menu for the current device
            var parentMenu = DataServicesHelper.FindMenusForDevice(CurrentDevice, _dataServices.MenuTrees);
            if (parentMenu == null)
            {
                //NotificationHelper.ShowError("无法找到当前设备的父级菜单，无法添加变量表菜单。");
                return;
            }

            // 4. Start database transaction
            await db.BeginTranAsync();

            // 5. AddAsync variable table to the database
            var addedVarTable = await _varTableRepository.AddAsync(newVarTable, db);

            // 6. Create and add the corresponding menu item
            var newMenu = new MenuBean
                          {
                              Name = addedVarTable.Name,
                              DataId = addedVarTable.Id,
                              Type = MenuType.VariableTableMenu,
                              ParentId = parentMenu.Id,
                              Icon = iNKORE.UI.WPF.Modern.Common.IconKeys.SegoeFluentIcons.Tablet.Glyph
                          };
            await _menuRepository.AddAsync(newMenu, db);

            // 7. Commit transaction
            await db.CommitTranAsync();

            // 8. Update UI
            CurrentDevice?.VariableTables?.Add(addedVarTable);
            MessageHelper.SendLoadMessage(Enums.LoadTypes.Menu); // Refresh the main navigation menu
            //NotificationHelper.ShowSuccess($"变量表 {addedVarTable.Name} 添加成功。");
        }
        catch (Exception ex)
        {
            await db.RollbackTranAsync();
            //NotificationHelper.ShowError($"添加变量表时发生错误: {ex.Message}", ex);
        }
    }

    [RelayCommand]
    private async Task EditVariableTable()
    {
        if (SelectedVariableTable == null)
        {
            //NotificationHelper.ShowInfo("请选择要编辑的变量表。");
            return;
        }

        using var db = DbContext.GetInstance();
        try
        {
            var originalName = SelectedVariableTable.Name; // Store original name for comparison
            var editedVarTable = await _dialogService.ShowEditVarTableDialog(SelectedVariableTable);
            if (editedVarTable == null) return;

            await db.BeginTranAsync();

            // Update variable table in DB
            var result = await _varTableRepository.UpdateAsync(SelectedVariableTable, db);

            if (result > 0)
            {
                // Update corresponding menu item if name changed
                if (originalName != SelectedVariableTable.Name)
                {
                    var menu = DataServicesHelper.FindVarTableMenu(SelectedVariableTable.Id, _dataServices.MenuTrees);
                    if (menu != null)
                    {
                        menu.Name = SelectedVariableTable.Name;
                        await _menuRepository.UpdateAsync(menu, db);
                    }
                }

                await db.CommitTranAsync();
                //NotificationHelper.ShowSuccess($"变量表 {SelectedVariableTable.Name} 编辑成功。");
                MessageHelper.SendLoadMessage(Enums.LoadTypes.Menu); // Refresh the main navigation menu
            }
            else
            {
                await db.RollbackTranAsync();
                //NotificationHelper.ShowError($"变量表 {SelectedVariableTable.Name} 编辑失败。");
            }
        }
        catch (Exception ex)
        {
            await db.RollbackTranAsync();
            //NotificationHelper.ShowError($"编辑变量表时发生错误: {ex.Message}", ex);
        }
    }

    [RelayCommand]
    private async Task DeleteVariableTable()
    {
        if (SelectedVariableTable == null)
        {
            //NotificationHelper.ShowInfo("请选择要删除的变量表。");
            return;
        }

        var confirm = await _dialogService.ShowConfrimeDialog(
            "删除确认",
            $"确定要删除变量表 \"{SelectedVariableTable.Name}\" 吗?\n\n此操作将同时删除该变量表下的所有变量数据，且无法恢复！",
            "删除");

        if (!confirm) return;

        using var db = DbContext.GetInstance();
        try
        {
            await db.BeginTranAsync();

            // Find the corresponding menu item
            MenuBean menuToDelete = null;
            if (_dataServices.MenuTrees != null)
            {
                menuToDelete = DataServicesHelper.FindVarTableMenu( SelectedVariableTable.Id,_dataServices.MenuTrees);
            }

            // Delete variable table from DB
            var result = await _varTableRepository.DeleteAsync(SelectedVariableTable, db);

            if (result > 0)
            {
                // Delete corresponding menu item
                if (menuToDelete != null)
                {
                    await _menuRepository.DeleteAsync(menuToDelete, db);
                }

                await db.CommitTranAsync();
                var delVarTableName = SelectedVariableTable.Name;
                CurrentDevice?.VariableTables?.Remove(SelectedVariableTable);
                //NotificationHelper.ShowSuccess($"变量表 {delVarTableName} 删除成功。");
                MessageHelper.SendLoadMessage(Enums.LoadTypes.Menu); // Refresh the main navigation menu
            }
            else
            {
                await db.RollbackTranAsync();
                //NotificationHelper.ShowError($"变量表 {SelectedVariableTable.Name} 删除失败。");
            }
        }
        catch (Exception ex)
        {
            await db.RollbackTranAsync();
            //NotificationHelper.ShowError($"删除变量表时发生错误: {ex.Message}", ex);
        }
    }

    // Placeholder for EditDeviceCommand and DeleteDeviceCommand if they are needed here
    [RelayCommand]
    private async Task EditDevice()
    {
        // Implement device editing logic, similar to AddDeviceCommand but for existing device
        //NotificationHelper.ShowInfo("编辑设备功能待实现。");
        await Task.CompletedTask;
    }

    [RelayCommand]
    private async Task DeleteDevice()
    {
        // Implement device deletion logic
        //NotificationHelper.ShowInfo("删除设备功能待实现。");
        await Task.CompletedTask;
    }

    [RelayCommand]
    private void NavigateToVariableTable()
    {
        if (SelectedVariableTable == null) return;

        var variableTableVm = App.Current.Services.GetRequiredService<VariableTableViewModel>();
        variableTableVm.VariableTable = SelectedVariableTable;
        MessageHelper.SendNavgatorMessage(variableTableVm);
    }
}