using HandyControl.Controls;
using HandyControl.Tools.Extension;
using Prism.Events;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Windows;
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.Views.MixerMaterialTareStrategy;

namespace YY.Admin.ViewModels.MixerMaterialTareStrategy;

public class MixerMaterialTareStrategyListViewModel : BaseViewModel
{
    private readonly IMixerMaterialTareStrategyService _tareStrategyService;
    private SubscriptionToken? _changedToken;
    private SubscriptionToken? _syncConflictToken;

    private ObservableCollection<MesXslMixerMaterialTareStrategy> _strategies = new();
    public ObservableCollection<MesXslMixerMaterialTareStrategy> Strategies
    {
        get => _strategies;
        set => SetProperty(ref _strategies, 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 string? _filterMixerMaterialName;
    public string? FilterMixerMaterialName
    {
        get => _filterMixerMaterialName;
        set => SetProperty(ref _filterMixerMaterialName, value);
    }

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

    public DelegateCommand SearchCommand { get; }
    public DelegateCommand ResetCommand { get; }
    public DelegateCommand AddCommand { get; }
    public DelegateCommand<MesXslMixerMaterialTareStrategy> EditCommand { get; }
    public DelegateCommand<MesXslMixerMaterialTareStrategy> DeleteCommand { get; }
    public DelegateCommand PrevPageCommand { get; }
    public DelegateCommand NextPageCommand { get; }

    public MixerMaterialTareStrategyListViewModel(
        IMixerMaterialTareStrategyService tareStrategyService,
        IContainerExtension container,
        IRegionManager regionManager) : base(container, regionManager)
    {
        _tareStrategyService = tareStrategyService;

        SearchCommand = new DelegateCommand(async () => { PageNo = 1; await LoadAsync(); });
        ResetCommand = new DelegateCommand(async () =>
        {
            FilterMixerMaterialName = null;
            FilterSupplierName = null;
            PageNo = 1;
            await LoadAsync();
        });
        AddCommand = new DelegateCommand(async () => await ShowAddDialogAsync());
        EditCommand = new DelegateCommand<MesXslMixerMaterialTareStrategy>(async s => await ShowEditDialogAsync(s));
        DeleteCommand = new DelegateCommand<MesXslMixerMaterialTareStrategy>(async s => await DeleteAsync(s));
        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<MixerMaterialTareStrategyChangedEvent>()
            .Subscribe(async p => await OnChangedAsync(p), ThreadOption.UIThread);
        _syncConflictToken = _eventAggregator.GetEvent<SyncConflictEvent>()
            .Subscribe(OnSyncConflict, ThreadOption.UIThread);

        _ = InitializeAsync();
    }

    private async Task OnChangedAsync(MixerMaterialTareStrategyChangedPayload payload)
    {
        if (payload.Action == "edit" && !string.IsNullOrWhiteSpace(payload.TareStrategyId))
            await RefreshSingleAsync(payload.TareStrategyId!);
        else
            await LoadAsync();
    }

    private async Task RefreshSingleAsync(string id)
    {
        try
        {
            var updated = await _tareStrategyService.GetByIdAsync(id);
            if (updated == null) return;
            var idx = Strategies.ToList().FindIndex(s => string.Equals(s.Id, id, StringComparison.OrdinalIgnoreCase));
            if (idx >= 0) Strategies[idx] = updated;
        }
        catch (Exception ex)
        {
            Debug.WriteLine($"[密炼物料皮重策略] 单条刷新失败: {ex.Message}");
        }
    }

    private void OnSyncConflict(SyncConflictPayload payload)
    {
        if (!string.Equals(payload.EntityName, "密炼物料皮重策略", StringComparison.OrdinalIgnoreCase)) return;

        var parts = new List<string>();
        if (payload.PushedCount > 0)
            parts.Add($"已同步 {payload.PushedCount} 条本地改动到服务器");
        if (payload.NewRecordsPushed > 0)
            parts.Add($"已上传 {payload.NewRecordsPushed} 条本地新增记录");
        if (payload.ConflictCount > 0)
            parts.Add($"{payload.ConflictCount} 条记录与服务器版本冲突，已保留服务器版本");

        if (parts.Count == 0) return;
        var message = string.Join("\n", parts);
        if (payload.ConflictCount > 0) Growl.Warning(message);
        else Growl.Success(message);
    }

    private async Task InitializeAsync()
    {
        try
        {
            await UIHelper.WaitForRenderAsync();
            await LoadAsync();
        }
        catch (Exception ex)
        {
            Debug.WriteLine($"密炼物料皮重策略列表初始化失败: {ex.Message}");
        }
    }

    public async Task LoadAsync()
    {
        try
        {
            IsLoading = true;
            var result = await _tareStrategyService.PageAsync(
                PageNo, PageSize, FilterMixerMaterialName, FilterSupplierName);
            Strategies = new ObservableCollection<MesXslMixerMaterialTareStrategy>(result.Records);
            Total = result.Total;
        }
        catch (Exception ex)
        {
            Growl.Error($"加载密炼物料皮重策略失败：{ex.Message}");
        }
        finally
        {
            IsLoading = false;
        }
    }

    private async Task ShowAddDialogAsync()
    {
        try
        {
            var result = await HandyControl.Controls.Dialog.Show<MixerMaterialTareStrategyEditDialogView>()
                .Initialize<MixerMaterialTareStrategyEditDialogViewModel>(vm => vm.InitializeForAdd())
                .GetResultAsync<bool>();
            if (result) await LoadAsync();
        }
        catch (Exception ex)
        {
            Growl.Error($"打开新增对话框失败：{ex.Message}");
        }
    }

    private async Task ShowEditDialogAsync(MesXslMixerMaterialTareStrategy strategy)
    {
        if (strategy == null) return;
        try
        {
            var result = await HandyControl.Controls.Dialog.Show<MixerMaterialTareStrategyEditDialogView>()
                .Initialize<MixerMaterialTareStrategyEditDialogViewModel>(vm => vm.InitializeForEdit(strategy))
                .GetResultAsync<bool>();
            if (result) await LoadAsync();
        }
        catch (Exception ex)
        {
            Growl.Error($"打开编辑对话框失败：{ex.Message}");
        }
    }

    private async Task DeleteAsync(MesXslMixerMaterialTareStrategy strategy)
    {
        if (strategy?.Id == null) return;
        var confirm = System.Windows.MessageBox.Show(
            $"确定删除【{strategy.MixerMaterialName} / {strategy.SupplierName}】的包装物重量策略？此操作不可恢复！",
            "确认删除", MessageBoxButton.OKCancel, MessageBoxImage.Question);
        if (confirm != System.Windows.MessageBoxResult.OK) return;

        var ok = await _tareStrategyService.DeleteAsync(strategy.Id);
        if (ok) { Growl.Success("删除成功！"); await LoadAsync(); }
        else Growl.Error("删除失败！");
    }

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