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.RawMaterialEntry;

/// <summary>
/// 库区选择弹窗 ViewModel。
/// 用于「拆码明细 → 库位」字段：点击库位输入框时弹出本对话框，支持按名称/编码搜索，单选确认。
/// </summary>
public class WarehouseAreaPickerDialogViewModel : BaseViewModel, IDialogResultable<bool>
{
    private readonly IWarehouseAreaService _warehouseAreaService;

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

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

    public ObservableCollection<MesXslWarehouseArea> Records { get; } = new();

    private MesXslWarehouseArea? _selectedRecord;
    public MesXslWarehouseArea? SelectedRecord
    {
        get => _selectedRecord;
        set
        {
            SetProperty(ref _selectedRecord, value);
            ConfirmCommand.RaiseCanExecuteChanged();
            RaisePropertyChanged(nameof(SelectedRecordDisplay));
            RaisePropertyChanged(nameof(HasSelectedRecord));
        }
    }

    public string SelectedRecordDisplay => _selectedRecord != null
        ? $"[{_selectedRecord.AreaCode}]  {_selectedRecord.AreaName}  · 仓库：{_selectedRecord.WarehouseName ?? "-"}"
        : "选中库区后点击「确认选择」";

    public bool HasSelectedRecord => _selectedRecord != 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 WarehouseAreaPickerDialogViewModel(
        IWarehouseAreaService warehouseAreaService,
        IContainerExtension container,
        IRegionManager regionManager) : base(container, regionManager)
    {
        _warehouseAreaService = warehouseAreaService;
        SearchCommand = new DelegateCommand(async () => await LoadAsync());
        ConfirmCommand = new DelegateCommand(Confirm, () => SelectedRecord != null);
        CancelCommand = new DelegateCommand(() => CloseAction?.Invoke());
        _ = LoadAsync();
    }

    /// <summary>
    /// 可由外部传入「当前已选库区名称」用于打开后高亮预选。
    /// </summary>
    public void Initialize(string? currentAreaName)
    {
        if (!string.IsNullOrWhiteSpace(currentAreaName))
        {
            SearchAreaName = currentAreaName.Trim();
            _ = LoadAsync();
        }
    }

    private async Task LoadAsync()
    {
        try
        {
            IsLoading = true;
            var result = await _warehouseAreaService.PageAsync(
                1,
                500,
                areaCode: SearchAreaCode?.Trim(),
                areaName: SearchAreaName?.Trim(),
                warehouseId: null,
                status: "0");

            Records.Clear();
            foreach (var record in result.Records)
            {
                Records.Add(record);
            }

            if (!string.IsNullOrWhiteSpace(SearchAreaName))
            {
                SelectedRecord = Records.FirstOrDefault(x =>
                    string.Equals(x.AreaName, SearchAreaName, StringComparison.OrdinalIgnoreCase));
            }
        }
        catch
        {
            Records.Clear();
        }
        finally
        {
            IsLoading = false;
        }
    }

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