using HandyControl.Controls;
using Prism.Events;
using System.Collections.ObjectModel;
using System.Diagnostics;
using YY.Admin.Core;
using YY.Admin.Core.Entity;
using YY.Admin.Core.Events;
using YY.Admin.Core.Helper;
using YY.Admin.Core.Services;
using YY.Admin.Services.Service;

namespace YY.Admin.ViewModels.MixingProductionPlan;

public class MixingProductionPlanListViewModel : BaseViewModel
{
    private readonly IMixingProductionPlanService _planService;
    private SubscriptionToken? _changedToken;

    private ObservableCollection<MesXslMixingProductionPlan> _items = new();
    public ObservableCollection<MesXslMixingProductionPlan> Items
    {
        get => _items;
        set => SetProperty(ref _items, value);
    }

    private long _total;
    public long Total { get => _total; set => SetProperty(ref _total, value); }

    private int _pageNo = 1;
    public int PageNo { get => _pageNo; set => SetProperty(ref _pageNo, value); }

    private int _pageSize = 20;
    public int PageSize { get => _pageSize; set => SetProperty(ref _pageSize, value); }

    private DateTime? _filterPlanDateFrom;
    public DateTime? FilterPlanDateFrom { get => _filterPlanDateFrom; set => SetProperty(ref _filterPlanDateFrom, value); }

    private DateTime? _filterPlanDateTo;
    public DateTime? FilterPlanDateTo { get => _filterPlanDateTo; set => SetProperty(ref _filterPlanDateTo, value); }

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

    private int? _filterShiftFlag;
    public int? FilterShiftFlag { get => _filterShiftFlag; set => SetProperty(ref _filterShiftFlag, value); }

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

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

    public ObservableCollection<KeyValuePair<string, int?>> ShiftOptions { get; } = new()
    {
        new KeyValuePair<string, int?>("全部", null),
        new KeyValuePair<string, int?>("早班", 1),
        new KeyValuePair<string, int?>("中班", 2),
        new KeyValuePair<string, int?>("晚班", 3)
    };

    public DelegateCommand SearchCommand { get; }
    public DelegateCommand ResetCommand { get; }
    public DelegateCommand PrevPageCommand { get; }
    public DelegateCommand NextPageCommand { get; }

    public MixingProductionPlanListViewModel(
        IMixingProductionPlanService planService,
        IContainerExtension container,
        IRegionManager regionManager) : base(container, regionManager)
    {
        _planService = planService;

        SearchCommand = new DelegateCommand(async () => { PageNo = 1; await LoadAsync(); });
        ResetCommand = new DelegateCommand(async () =>
        {
            FilterPlanDateFrom = null;
            FilterPlanDateTo = null;
            FilterMachineName = null;
            FilterShiftFlag = null;
            FilterPlanNo = null;
            FilterMaterialName = null;
            PageNo = 1;
            await LoadAsync();
        });
        PrevPageCommand = new DelegateCommand(async () => { if (PageNo > 1) { PageNo--; await LoadAsync(); } });
        NextPageCommand = new DelegateCommand(async () => { if ((long)PageNo * PageSize < Total) { PageNo++; await LoadAsync(); } });

        _changedToken = _eventAggregator.GetEvent<MixingProductionPlanChangedEvent>()
            .Subscribe(async _ => await LoadAsync(), ThreadOption.UIThread);

        _ = InitializeAsync();
    }

    private async Task InitializeAsync()
    {
        try
        {
            await UIHelper.WaitForRenderAsync();
            await LoadAsync();
        }
        catch (Exception ex)
        {
            Debug.WriteLine($"密炼计划列表初始化失败: {ex.Message}");
        }
    }

    public async Task LoadAsync()
    {
        try
        {
            IsLoading = true;
            var result = await _planService.PageAsync(
                PageNo, PageSize,
                FilterPlanDateFrom, FilterPlanDateTo,
                FilterMachineName, FilterShiftFlag,
                FilterPlanNo, FilterMaterialName);
            Items = new ObservableCollection<MesXslMixingProductionPlan>(result.Records);
            Total = result.Total;
        }
        catch (Exception ex)
        {
            Growl.Error($"加载密炼计划失败：{ex.Message}");
        }
        finally
        {
            IsLoading = false;
        }
    }

    protected override void CleanUp()
    {
        base.CleanUp();
        if (_changedToken != null)
        {
            _eventAggregator.GetEvent<MixingProductionPlanChangedEvent>().Unsubscribe(_changedToken);
            _changedToken = null;
        }
    }
}