using FATrace.WPLApp.Core;
using FATrace.WPLApp.ModelDto;
using FATrace.WPLApp.Services;
using FATrace.WPLApp.Views;
using Prism.Commands;
using Prism.Events;
using Prism.Regions;
using Prism.Services.Dialogs;
using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Windows;

namespace FATrace.WPLApp.ViewModels
{
    public class MainViewModel : NavigationViewModel
    {
        public MainViewModel(IRegionManager regionManager, IDialogService dialogService, IEventAggregator eventAggregator, NavigationServices navigationServices, SysRunService sysRunService)
        {
            this.regionManager = regionManager;
            DialogService = dialogService;
            NavigationServices = navigationServices;
            _sys = sysRunService;
            NavigationItems = BuildNavigationItems(_sys.CurAccessLevel);
            _sys.PropertyChanged += SysOnPropertyChanged;

            this.regionManager.RegisterViewWithRegion("FootRegion", typeof(FootView));
            this.regionManager.RegisterViewWithRegion("HeadRegion", typeof(HeadView));

            //this.regionManager.RegisterViewWithRegion("ContentRegion", typeof(ProFlowView));

        }

        private IRegionManager regionManager { get; set; }
        public IDialogService DialogService { get; }
        public NavigationServices NavigationServices { get; }

        private readonly SysRunService _sys;

        public ObservableCollection<NavItemDto> NavigationItems { get; set; }

        private void SysOnPropertyChanged(object? sender, PropertyChangedEventArgs e)
        {
            if (e.PropertyName == nameof(SysRunService.CurAccessLevel) || e.PropertyName == nameof(SysRunService.CurUser))
            {
                NavigationItems = BuildNavigationItems(_sys.CurAccessLevel);
                RaisePropertyChanged(nameof(NavigationItems));
            }
        }

        private ObservableCollection<NavItemDto> BuildNavigationItems(string? accessLevel)
        {
            // 未登录/访客：仅允许 Dashboard + 用户登录
            if (string.IsNullOrWhiteSpace(accessLevel) || string.Equals(accessLevel, UserManageViewModel.AccessLevels.Guest, StringComparison.OrdinalIgnoreCase))
            {
                var dashboard = NavigationServices.NavItemDtos.FirstOrDefault(a => string.Equals(a.CmdPar, "Dashboard", StringComparison.OrdinalIgnoreCase));
                var system = NavigationServices.NavItemDtos.FirstOrDefault(a => string.Equals(a.Name, "系统", StringComparison.OrdinalIgnoreCase));

                var result = new ObservableCollection<NavItemDto>();
                if (dashboard != null) result.Add(CloneNavItem(dashboard));

                if (system != null)
                {
                    var sysClone = CloneNavItem(system);
                    sysClone.ChildrenNavItemDtos = new ObservableCollection<NavItemDto>(
                        sysClone.ChildrenNavItemDtos
                            .Where(a => string.Equals(a.CmdPar, "用户登录", StringComparison.OrdinalIgnoreCase))
                            .ToList());
                    result.Add(sysClone);
                }

                return result;
            }

            // 管理员/操作员：完整菜单
            return new ObservableCollection<NavItemDto>(NavigationServices.NavItemDtos.Select(CloneNavItem));
        }

        private NavItemDto CloneNavItem(NavItemDto src)
        {
            var dst = new NavItemDto
            {
                Name = src.Name,
                CmdPar = src.CmdPar,
                Icon = src.Icon,
                IsParent = src.IsParent,
                ChildrenNavItemDtos = new ObservableCollection<NavItemDto>()
            };

            if (src.ChildrenNavItemDtos != null && src.ChildrenNavItemDtos.Count > 0)
            {
                foreach (var c in src.ChildrenNavItemDtos)
                {
                    dst.ChildrenNavItemDtos.Add(CloneNavItem(c));
                }
            }

            return dst;
        }

        private string titel = string.Empty;
        /// <summary>
        /// 标题
        /// </summary>
        public string Title
        {
            get { return titel; }
            set { titel = value; RaisePropertyChanged(); }
        }

        private DelegateCommand<object> _OpenCommand;
        /// <summary>
        /// 命令
        /// </summary>
        public DelegateCommand<object> OpenCommand
        {
            get
            {
                if (_OpenCommand == null)
                {
                    _OpenCommand = new DelegateCommand<object>((p) => OpenCommandMethod(p));
                }
                return _OpenCommand;
            }
        }

        private void OpenCommandMethod(object obj)
        {
            var cmd = obj?.ToString() ?? string.Empty;

            // 父级目录/空命令不做任何处理（避免点击父节点触发弹窗或导航）
            if (string.IsNullOrWhiteSpace(cmd))
            {
                return;
            }

            // 访客/未登录：仅 Dashboard + 用户登录
            if (string.IsNullOrWhiteSpace(_sys.CurAccessLevel) || string.Equals(_sys.CurAccessLevel, UserManageViewModel.AccessLevels.Guest, StringComparison.OrdinalIgnoreCase))
            {
                if (!string.Equals(cmd, "Dashboard", StringComparison.OrdinalIgnoreCase)
                    && !string.Equals(cmd, "用户登录", StringComparison.OrdinalIgnoreCase))
                {
                    MessageBox.Show("当前账号权限为【访客】，仅允许访问 Dashboard。", "权限不足", MessageBoxButton.OK, MessageBoxImage.Warning);
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("DashBoardView");
                    return;
                }
            }

            switch (cmd)
            {
                case "Dashboard":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("DashBoardView");
                    //this.regionManager.Regions["ContentRegion"].Activate(viewA);
                    break;
                case "3D工艺流程":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("ProFlowView");
                    //this.regionManager.Regions["DriveTree"].RequestNavigate("DeviceProtocolTreeView");
                    //this.regionManager.Regions["ContentRegion"].Activate(viewB);
                    break;
                case "管道线路":
                    DialogService.ShowDialog("DialogLineSelectView", new DialogParameters() { { "TabIndex", "SeletedGroupTabIndex" } }, (par) =>
                    {
                        if (par.Result == ButtonResult.OK)
                        {
                            //程序名称
                            var ReturnValue = par.Parameters.GetValue<string>("Name");
                            //返回数据，刷新Chart

                        }
                        else if (par.Result == ButtonResult.Cancel)
                        {
                            //取消

                        }

                    });
                    break;

                //case "报表数据":
                //    this.regionManager.Regions["ContentRegion"].RequestNavigate("ReportView");


                    //this.regionManager.Regions["ContentRegion"].Activate(viewB);
                    //break;
                case "原料使用查询":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("RawProUseView");
                    break;
                case "原料入库查询":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("RawProInputView");
                    break;
                case "文件导入日志":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("FileImportLogView");
                    break;
                // 工厂/OEM Excel 导入数据查询
                case "工厂-入库":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("FactoryInboundView");
                    break;
                case "工厂-领料":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("FactoryMaterialWithdrawalView");
                    break;
                case "工厂-出入库":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("FactoryInventoryTransactionView");
                    break;
                case "工厂-原料生产信息":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("FactoryProductionRecordView");
                    break;
                case "工厂-成品出库":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("FactoryOutboundView");
                    break;
                case "OEM-入库":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("OEMInboundView");
                    break;
                case "OEM-出库":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("OEMOutboundView");
                    break;
                case "OEM-出入库":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("OEMInventoryTransactionView");
                    break;
                case "OEM-原料使用信息":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("OEMRawUsageInfoView");
                    break;
                case "历史报警":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("HistoryAlarmView");

                    //this.regionManager.Regions["ContentRegion"].Activate(viewB);
                    break;
                case "日志信息":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("LogView");
                    break;
                case "用户登录":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("LoginView");
                    //this.regionManager.Regions["ContentRegion"].Activate(Shift);
                    break;
                case "用户管理":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("UserManageView");
                    break;
                case "称重用户":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("WeightUserManageView");
                    break;
                case "使用手册":
                    this.regionManager.Regions["ContentRegion"].RequestNavigate("HelpManualView");
                    break;
                default:
                    break;
            }
            //this.regionManager.RegisterViewWithRegion("ContentRegion", typeof(CoreShift.Views.Shift.Index));

            //MessageBox.Show(obj.ToString());

        }


    }
}