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.Services.Service;
using YY.Admin.Views.Print;
using YY.Admin.Views.RawMaterialCard;

namespace YY.Admin.ViewModels.RawMaterialCard;

public class RawMaterialCardListViewModel : BaseViewModel
{
    private readonly IRawMaterialCardService _cardService;
    private readonly IJeecgDictSyncService _dictSyncService;
    private readonly IPrintDotService _printDotService;
    private SubscriptionToken? _changedToken;
    private SubscriptionToken? _syncConflictToken;

    private ObservableCollection<MesXslRawMaterialCard> _cards = new();
    public ObservableCollection<MesXslRawMaterialCard> Cards
    {
        get => _cards;
        set => SetProperty(ref _cards, 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? _filterBarcode;
    public string? FilterBarcode { get => _filterBarcode; set => SetProperty(ref _filterBarcode, value); }

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

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

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

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

    public ObservableCollection<KeyValuePair<string, string>> StatusOptions { get; } = new();
    public ObservableCollection<KeyValuePair<string, string>> TestResultOptions { get; } = new();

    public DelegateCommand SearchCommand { get; }
    public DelegateCommand ResetCommand { get; }
    public DelegateCommand AddCommand { get; }
    public DelegateCommand<MesXslRawMaterialCard> EditCommand { get; }
    public DelegateCommand<MesXslRawMaterialCard> DeleteCommand { get; }
    public DelegateCommand<MesXslRawMaterialCard> PrintCommand { get; }
    public DelegateCommand<MesXslRawMaterialCard> TogglePriorityCommand { get; }
    public DelegateCommand PrevPageCommand { get; }
    public DelegateCommand NextPageCommand { get; }

    public RawMaterialCardListViewModel(
        IRawMaterialCardService cardService,
        IJeecgDictSyncService dictSyncService,
        IPrintDotService printDotService,
        IContainerExtension container,
        IRegionManager regionManager) : base(container, regionManager)
    {
        _cardService = cardService;
        _dictSyncService = dictSyncService;
        _printDotService = printDotService;

        SearchCommand = new DelegateCommand(async () => { PageNo = 1; await LoadAsync(); });
        ResetCommand = new DelegateCommand(async () =>
        {
            FilterBarcode = null; FilterBatchNo = null; FilterMaterialName = null;
            FilterSupplierName = null; FilterStatus = null; PageNo = 1;
            await LoadAsync();
        });
        AddCommand = new DelegateCommand(async () => await ShowAddDialogAsync());
        EditCommand = new DelegateCommand<MesXslRawMaterialCard>(async c => await ShowEditDialogAsync(c));
        DeleteCommand = new DelegateCommand<MesXslRawMaterialCard>(async c => await DeleteAsync(c));
        PrintCommand = new DelegateCommand<MesXslRawMaterialCard>(async c => await ShowPrintPreviewAsync(c));
        TogglePriorityCommand = new DelegateCommand<MesXslRawMaterialCard>(async c => await TogglePriorityAsync(c));
        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<RawMaterialCardChangedEvent>()
            .Subscribe(async p => await OnChangedAsync(p), ThreadOption.UIThread);
        _syncConflictToken = _eventAggregator.GetEvent<SyncConflictEvent>()
            .Subscribe(OnSyncConflict, ThreadOption.UIThread);

        _ = InitializeAsync();
    }

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

    private async Task RefreshSingleAsync(string cardId)
    {
        try
        {
            var updated = await _cardService.GetByIdAsync(cardId);
            if (updated == null) return;
            var idx = Cards.ToList().FindIndex(c => string.Equals(c.Id, cardId, StringComparison.OrdinalIgnoreCase));
            if (idx >= 0) Cards[idx] = updated;
        }
        catch (Exception ex)
        {
            Debug.WriteLine($"[原材料卡片] 单条刷新失败: {ex.Message}");
        }
    }

    private void OnSyncConflict(SyncConflictPayload payload)
    {
        if (!string.Equals(payload.EntityName, "原材料卡片", 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 LoadDictOptionsAsync();
            await UIHelper.WaitForRenderAsync();
            await LoadAsync();
        }
        catch (Exception ex)
        {
            Debug.WriteLine($"[原材料卡片] 初始化失败: {ex.Message}");
        }
    }

    private async Task LoadDictOptionsAsync()
    {
        try
        {
            var statusOpts = await _dictSyncService.GetDictOptionsAsync("xslmes_card_status", includeAll: true);
            var testResultOpts = await _dictSyncService.GetDictOptionsAsync("xslmes_test_result", includeAll: true);

            StatusOptions.Clear();
            foreach (var item in statusOpts) StatusOptions.Add(item);
            if (StatusOptions.Count == 0) StatusOptions.Add(new KeyValuePair<string, string>("全部", ""));

            TestResultOptions.Clear();
            foreach (var item in testResultOpts) TestResultOptions.Add(item);
            if (TestResultOptions.Count == 0) TestResultOptions.Add(new KeyValuePair<string, string>("全部", ""));
        }
        catch
        {
            StatusOptions.Clear();
            StatusOptions.Add(new KeyValuePair<string, string>("全部", ""));
            StatusOptions.Add(new KeyValuePair<string, string>("正常", "1"));
            StatusOptions.Add(new KeyValuePair<string, string>("异常", "0"));

            TestResultOptions.Clear();
            TestResultOptions.Add(new KeyValuePair<string, string>("全部", ""));
            TestResultOptions.Add(new KeyValuePair<string, string>("未检", "0"));
            TestResultOptions.Add(new KeyValuePair<string, string>("合格", "1"));
            TestResultOptions.Add(new KeyValuePair<string, string>("不合格", "2"));
        }
    }

    public async Task LoadAsync()
    {
        try
        {
            IsLoading = true;
            var result = await _cardService.PageAsync(PageNo, PageSize,
                FilterBarcode, FilterBatchNo, FilterMaterialName, FilterSupplierName, FilterStatus);
            Cards = new ObservableCollection<MesXslRawMaterialCard>(result.Records);
            Total = result.Total;
        }
        catch (Exception ex)
        {
            Growl.Error($"加载原材料卡片失败：{ex.Message}");
        }
        finally
        {
            IsLoading = false;
        }
    }

    private async Task ShowAddDialogAsync()
    {
        try
        {
            var result = await HandyControl.Controls.Dialog.Show<RawMaterialCardEditDialogView>()
                .Initialize<RawMaterialCardEditDialogViewModel>(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(MesXslRawMaterialCard card)
    {
        if (card == null) return;
        try
        {
            var result = await HandyControl.Controls.Dialog.Show<RawMaterialCardEditDialogView>()
                .Initialize<RawMaterialCardEditDialogViewModel>(vm => vm.InitializeForEdit(card))
                .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(MesXslRawMaterialCard card)
    {
        if (card?.Id == null) return;
        var confirm = System.Windows.MessageBox.Show(
            $"确定删除原材料卡片（条码：{card.Barcode}）？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 _cardService.DeleteAsync(card.Id);
        if (ok) { Growl.Success("删除成功！"); await LoadAsync(); }
        else Growl.Error("删除失败！");
    }

    private async Task TogglePriorityAsync(MesXslRawMaterialCard card)
    {
        if (card?.Id == null) return;
        var newVal = card.PriorityPickup == "1" ? "0" : "1";
        var ok = await _cardService.UpdatePriorityAsync(card.Id, newVal);
        if (ok)
        {
            card.PriorityPickup = newVal;
            RaisePropertyChanged(nameof(Cards));
        }
        else
        {
            Growl.Error("优先出库设置失败！");
        }
    }

    private async Task ShowPrintPreviewAsync(MesXslRawMaterialCard card)
    {
        if (card?.Id == null) return;
        try
        {
            IsLoading = true;
            var (templateJson, printDataJson, errorMessage) = await _cardService.PrepareNativePrintAsync(card.Id);
            if (errorMessage != null)
            {
                Growl.Error(errorMessage);
                return;
            }

            // 构造一个最简的 PrintTemplate 对象用于传入 PrintPreviewWindow（供显示标题 / 纸张信息）
            var tpl = BuildPrintTemplateFromJson(templateJson);

            var win = new PrintPreviewWindow(tpl, templateJson, _printDotService, null, printDataJson)
            {
                Owner = Application.Current.MainWindow,
                WindowStartupLocation = WindowStartupLocation.CenterOwner,
            };
            win.Show();
        }
        catch (Exception ex)
        {
            Growl.Error($"打开打印预览失败：{ex.Message}");
        }
        finally
        {
            IsLoading = false;
        }
    }

    private static PrintTemplate BuildPrintTemplateFromJson(string templateJson)
    {
        try
        {
            var root = System.Text.Json.JsonDocument.Parse(templateJson).RootElement;
            double w = 210, h = 297;
            if (root.TryGetProperty("page", out var page))
            {
                if (page.TryGetProperty("width",  out var wEl)) w = wEl.GetDouble();
                if (page.TryGetProperty("height", out var hEl)) h = hEl.GetDouble();
            }
            return new PrintTemplate
            {
                TemplateName     = "原材料卡片",
                TemplateCode     = "MES_RAW_MATERIAL_CARD",
                PaperWidthMm     = w,
                PaperHeightMm    = h,
                PaperOrientation = w > h ? "横向" : "纵向",
            };
        }
        catch
        {
            return new PrintTemplate { TemplateName = "原材料卡片", TemplateCode = "MES_RAW_MATERIAL_CARD" };
        }
    }

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