using HandyControl.Tools.Extension;
using System.Collections.ObjectModel;
using YY.Admin.Core;
using YY.Admin.Core.Entity;
using YY.Admin.Core.Services;

namespace YY.Admin.ViewModels.WeightRecord;

public class CustomerPickerDialogViewModel : BaseViewModel, IDialogResultable<bool>
{
    private readonly ICustomerService _customerService;

    private string? _searchText;
    public string? SearchText { get => _searchText; set => SetProperty(ref _searchText, value); }

    public ObservableCollection<MesXslCustomer> Customers { get; } = new();

    private MesXslCustomer? _selectedCustomer;
    public MesXslCustomer? SelectedCustomer
    {
        get => _selectedCustomer;
        set
        {
            SetProperty(ref _selectedCustomer, value);
            ConfirmCommand.RaiseCanExecuteChanged();
            RaisePropertyChanged(nameof(SelectedCustomerDisplay));
            RaisePropertyChanged(nameof(HasSelectedCustomer));
        }
    }

    public string SelectedCustomerDisplay => _selectedCustomer != null
        ? $"[{_selectedCustomer.CustomerCode}]  {_selectedCustomer.CustomerName}"
        : "选中客户后点击「确认选择」";

    public bool HasSelectedCustomer => _selectedCustomer != null;

    private bool _result;
    public bool Result { get => _result; set => SetProperty(ref _result, value); }
    public Action? CloseAction { get; set; }

    public DelegateCommand SearchCommand { get; }
    public DelegateCommand ConfirmCommand { get; }
    public DelegateCommand CancelCommand { get; }

    public CustomerPickerDialogViewModel(
        ICustomerService customerService,
        IContainerExtension container,
        IRegionManager regionManager) : base(container, regionManager)
    {
        _customerService = customerService;
        SearchCommand = new DelegateCommand(async () => await LoadAsync());
        ConfirmCommand = new DelegateCommand(Confirm, () => SelectedCustomer != null);
        CancelCommand = new DelegateCommand(() => CloseAction?.Invoke());
        _ = LoadAsync();
    }

    private async Task LoadAsync()
    {
        try
        {
            IsLoading = true;
            var keyword = SearchText?.Trim();
            var result = await _customerService.PageAsync(1, 200, customerName: keyword);
            Customers.Clear();
            foreach (var c in result.Records)
                Customers.Add(c);
        }
        catch
        {
            Customers.Clear();
        }
        finally
        {
            IsLoading = false;
        }
    }

    private void Confirm()
    {
        if (SelectedCustomer == null) return;
        Result = true;
        CloseAction?.Invoke();
    }
}