using HandyControl.Tools.Extension;
using System.Collections.ObjectModel;
using YY.Admin.Core;
using YY.Admin.Core.Entity;
using YY.Admin.Core.Services;
using YY.Admin.Core.Session;
using YY.Admin.ViewModels.RawMaterialEntry;
using YY.Admin.ViewModels.WeightRecord;
using YY.Admin.Views.RawMaterialEntry;
using YY.Admin.Views.WeightRecord;

namespace YY.Admin.ViewModels.MixerMaterialTareStrategy;

public class MixerMaterialTareStrategyEditDialogViewModel : BaseViewModel, IDialogResultable<bool>
{
    private readonly IMixerMaterialTareStrategyService _tareStrategyService;

    private MesXslMixerMaterialTareStrategy? _strategy;
    public MesXslMixerMaterialTareStrategy? Strategy
    {
        get => _strategy;
        set => SetProperty(ref _strategy, value);
    }

    public bool IsAddMode => string.IsNullOrWhiteSpace(Strategy?.Id) || (Strategy?.Id?.StartsWith("local-") ?? false);
    public string DialogTitle => IsAddMode ? "新增密炼物料皮重策略" : "编辑密炼物料皮重策略";

    public ObservableCollection<MesXslUnit> UnitOptions { get; } = new();

    private MesMixerMaterial? _selectedMaterial;
    public MesMixerMaterial? SelectedMaterial
    {
        get => _selectedMaterial;
        set
        {
            SetProperty(ref _selectedMaterial, value);
            RaisePropertyChanged(nameof(SelectedMaterialDisplay));
            RaisePropertyChanged(nameof(HasSelectedMaterial));
            if (Strategy != null && value != null)
            {
                Strategy.MixerMaterialId = value.Id;
                Strategy.MixerMaterialName = value.MaterialName;
                RaisePropertyChanged(nameof(Strategy));
            }
        }
    }

    public string SelectedMaterialDisplay => _selectedMaterial != null
        ? $"[{_selectedMaterial.MaterialCode}]  {_selectedMaterial.MaterialName}"
        : (string.IsNullOrWhiteSpace(Strategy?.MixerMaterialName) ? "请选择密炼物料" : Strategy!.MixerMaterialName!);

    public bool HasSelectedMaterial =>
        _selectedMaterial != null || !string.IsNullOrWhiteSpace(Strategy?.MixerMaterialId);

    private MesXslSupplier? _selectedSupplier;
    public MesXslSupplier? SelectedSupplier
    {
        get => _selectedSupplier;
        set
        {
            SetProperty(ref _selectedSupplier, value);
            RaisePropertyChanged(nameof(SelectedSupplierDisplay));
            RaisePropertyChanged(nameof(HasSelectedSupplier));
            if (Strategy != null && value != null)
            {
                Strategy.SupplierId = value.Id;
                Strategy.SupplierName = value.SupplierName;
                RaisePropertyChanged(nameof(Strategy));
            }
        }
    }

    public string SelectedSupplierDisplay => _selectedSupplier != null
        ? $"[{_selectedSupplier.SupplierCode}]  {_selectedSupplier.SupplierName}"
        : (string.IsNullOrWhiteSpace(Strategy?.SupplierName) ? "请选择供应商" : Strategy!.SupplierName!);

    public bool HasSelectedSupplier =>
        _selectedSupplier != null || !string.IsNullOrWhiteSpace(Strategy?.SupplierId);

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

    public DelegateCommand SaveCommand { get; }
    public DelegateCommand CancelCommand { get; }
    public DelegateCommand OpenMaterialPickerCommand { get; }
    public DelegateCommand ClearMaterialCommand { get; }
    public DelegateCommand OpenSupplierPickerCommand { get; }
    public DelegateCommand ClearSupplierCommand { get; }

    public MixerMaterialTareStrategyEditDialogViewModel(
        IMixerMaterialTareStrategyService tareStrategyService,
        IContainerExtension container,
        IRegionManager regionManager) : base(container, regionManager)
    {
        _tareStrategyService = tareStrategyService;
        SaveCommand = new DelegateCommand(async () => await SaveAsync());
        CancelCommand = new DelegateCommand(() => CloseAction?.Invoke());
        OpenMaterialPickerCommand = new DelegateCommand(async () => await OpenMaterialPickerAsync());
        ClearMaterialCommand = new DelegateCommand(ClearMaterialSelection);
        OpenSupplierPickerCommand = new DelegateCommand(async () => await OpenSupplierPickerAsync());
        ClearSupplierCommand = new DelegateCommand(ClearSupplierSelection);
        _ = LoadUnitsAsync();
    }

    private async Task LoadUnitsAsync()
    {
        try
        {
            var units = await _tareStrategyService.GetUnitsAsync();
            UnitOptions.Clear();
            foreach (var unit in units.Where(u => !string.IsNullOrWhiteSpace(u.Id)))
                UnitOptions.Add(unit);
        }
        catch
        {
            UnitOptions.Clear();
        }
    }

    public void InitializeForAdd()
    {
        Strategy = new MesXslMixerMaterialTareStrategy();
        _selectedMaterial = null;
        _selectedSupplier = null;
        RaisePropertyChanged(nameof(IsAddMode));
        RaisePropertyChanged(nameof(DialogTitle));
        RaisePropertyChanged(nameof(SelectedMaterialDisplay));
        RaisePropertyChanged(nameof(SelectedSupplierDisplay));
        RaisePropertyChanged(nameof(HasSelectedMaterial));
        RaisePropertyChanged(nameof(HasSelectedSupplier));
    }

    public void InitializeForEdit(MesXslMixerMaterialTareStrategy strategy)
    {
        Strategy = new MesXslMixerMaterialTareStrategy
        {
            Id = strategy.Id,
            TenantId = strategy.TenantId,
            MixerMaterialId = strategy.MixerMaterialId,
            MixerMaterialName = strategy.MixerMaterialName,
            SupplierId = strategy.SupplierId,
            SupplierName = strategy.SupplierName,
            MaterialSpec = strategy.MaterialSpec,
            TareWeight = strategy.TareWeight,
            PalletWeight = strategy.PalletWeight,
            UnitId = strategy.UnitId,
            UnitName = strategy.UnitName,
            EffectiveStartDate = strategy.EffectiveStartDate,
            EffectiveEndDate = strategy.EffectiveEndDate,
            MaintainBy = strategy.MaintainBy,
            UpdateTime = strategy.UpdateTime
        };
        _selectedMaterial = null;
        _selectedSupplier = null;
        RaisePropertyChanged(nameof(IsAddMode));
        RaisePropertyChanged(nameof(DialogTitle));
        RaisePropertyChanged(nameof(SelectedMaterialDisplay));
        RaisePropertyChanged(nameof(SelectedSupplierDisplay));
        RaisePropertyChanged(nameof(HasSelectedMaterial));
        RaisePropertyChanged(nameof(HasSelectedSupplier));
    }

    private async Task OpenMaterialPickerAsync()
    {
        RawMaterialEntryMaterialPickerDialogViewModel? pickerVm = null;
        bool confirmed;
        try
        {
            confirmed = await HandyControl.Controls.Dialog.Show<RawMaterialEntryMaterialPickerDialogView>()
                .Initialize<RawMaterialEntryMaterialPickerDialogViewModel>(vm =>
                {
                    pickerVm = vm;
                    vm.Initialize(Strategy?.MixerMaterialId, Strategy?.MixerMaterialName);
                })
                .GetResultAsync<bool>();
        }
        catch { return; }

        if (!confirmed || pickerVm?.SelectedMaterial == null) return;
        SelectedMaterial = pickerVm.SelectedMaterial;
    }

    private void ClearMaterialSelection()
    {
        _selectedMaterial = null;
        RaisePropertyChanged(nameof(SelectedMaterial));
        RaisePropertyChanged(nameof(SelectedMaterialDisplay));
        RaisePropertyChanged(nameof(HasSelectedMaterial));
        if (Strategy == null) return;
        Strategy.MixerMaterialId = null;
        Strategy.MixerMaterialName = null;
        RaisePropertyChanged(nameof(Strategy));
    }

    private async Task OpenSupplierPickerAsync()
    {
        SupplierPickerDialogViewModel? pickerVm = null;
        bool confirmed;
        try
        {
            confirmed = await HandyControl.Controls.Dialog.Show<SupplierPickerDialogView>()
                .Initialize<SupplierPickerDialogViewModel>(vm => pickerVm = vm)
                .GetResultAsync<bool>();
        }
        catch { return; }

        if (!confirmed || pickerVm?.SelectedSupplier == null) return;
        SelectedSupplier = pickerVm.SelectedSupplier;
    }

    private void ClearSupplierSelection()
    {
        _selectedSupplier = null;
        RaisePropertyChanged(nameof(SelectedSupplier));
        RaisePropertyChanged(nameof(SelectedSupplierDisplay));
        RaisePropertyChanged(nameof(HasSelectedSupplier));
        if (Strategy == null) return;
        Strategy.SupplierId = null;
        Strategy.SupplierName = null;
        RaisePropertyChanged(nameof(Strategy));
    }

    private async Task SaveAsync()
    {
        if (Strategy == null) return;

        if (string.IsNullOrWhiteSpace(Strategy.MixerMaterialId))
        {
            HandyControl.Controls.MessageBox.Warning("请选择密炼物料！");
            return;
        }
        if (string.IsNullOrWhiteSpace(Strategy.SupplierId))
        {
            HandyControl.Controls.MessageBox.Warning("请选择供应商！");
            return;
        }
        if (!Strategy.TareWeight.HasValue)
        {
            HandyControl.Controls.MessageBox.Warning("请填写包装物重量！");
            return;
        }
        if (Strategy.PalletWeight.HasValue && Strategy.PalletWeight.Value < 0)
        {
            HandyControl.Controls.MessageBox.Warning("托盘重量不能为负数！");
            return;
        }
        if (string.IsNullOrWhiteSpace(Strategy.UnitId))
        {
            HandyControl.Controls.MessageBox.Warning("请选择单位！");
            return;
        }
        if (!Strategy.EffectiveStartDate.HasValue || !Strategy.EffectiveEndDate.HasValue)
        {
            HandyControl.Controls.MessageBox.Warning("请填写完整的生效日期！");
            return;
        }
        if (Strategy.EffectiveStartDate.Value.Date > Strategy.EffectiveEndDate.Value.Date)
        {
            HandyControl.Controls.MessageBox.Warning("生效开始日期不能晚于截止日期！");
            return;
        }

        var selectedUnit = UnitOptions.FirstOrDefault(u => string.Equals(u.Id, Strategy.UnitId, StringComparison.OrdinalIgnoreCase));
        if (selectedUnit != null)
            Strategy.UnitName = selectedUnit.UnitName;

        Strategy.MaintainBy = AppSession.CurrentUser?.Account ?? Strategy.MaintainBy;
        Strategy.MaterialSpec = string.IsNullOrWhiteSpace(Strategy.MaterialSpec)
            ? null
            : Strategy.MaterialSpec.Trim();

        try
        {
            bool ok;
            if (IsAddMode)
            {
                ok = await _tareStrategyService.AddAsync(Strategy);
                if (ok) HandyControl.Controls.MessageBox.Success("新增成功！");
                else { HandyControl.Controls.MessageBox.Error("新增失败！"); return; }
            }
            else
            {
                ok = await _tareStrategyService.EditAsync(Strategy);
                if (!ok) { HandyControl.Controls.MessageBox.Error("编辑失败！"); return; }
            }
            Result = ok;
            CloseAction?.Invoke();
        }
        catch (Exception ex)
        {
            HandyControl.Controls.MessageBox.Error($"操作失败：{ex.Message}");
        }
    }
}