using LocalhostMES.DataBase;
using LocalhostMES.Core;
using LocalhostMES.Models;
using LocalhostMES.ViewModels.Services;
using LocalhostMES.Views;
using Prism.Commands;
using Prism.Mvvm;
using System;
using System.Collections.ObjectModel;
using System.Windows;

namespace LocalhostMES.ViewModels.Tabs
{
    public class WorkOrderManagementViewModel : BindableBase
    {
        private readonly IMesWorkspace _workspace;

        public WorkOrderManagementViewModel(IMesWorkspace workspace)
        {
            _workspace = workspace;
            _workspace.Initialize();
            MesDataChangedNotifier.Changed += OnDataChanged;
        }

        public ObservableCollection<WorkOrderInfo> DgWorkOrders => _workspace.WorkOrders;

        private WorkOrderInfo _selectWorkOrderInfo;
        public WorkOrderInfo SelectWorkOrderInfo
        {
            get => _selectWorkOrderInfo;
            set => SetProperty(ref _selectWorkOrderInfo, value);
        }

        private DelegateCommand _refreshWorkOrdersCommand;
        public DelegateCommand RefreshWorkOrdersCommand =>
            _refreshWorkOrdersCommand ?? (_refreshWorkOrdersCommand = new DelegateCommand(RefreshWorkOrders));

        private DelegateCommand _addWorkOrderCommand;
        public DelegateCommand AddWorkOrderCommand =>
            _addWorkOrderCommand ?? (_addWorkOrderCommand = new DelegateCommand(AddWorkOrder));

        private DelegateCommand _deleteWorkOrderCommand;
        public DelegateCommand DeleteWorkOrderCommand =>
            _deleteWorkOrderCommand ?? (_deleteWorkOrderCommand = new DelegateCommand(DeleteWorkOrder));

        private DelegateCommand _editWorkOrderCommand;
        public DelegateCommand EditWorkOrderCommand =>
            _editWorkOrderCommand ?? (_editWorkOrderCommand = new DelegateCommand(EditWorkOrder));

        private void RefreshWorkOrders()
        {
            try
            {
                _workspace.ReloadWorkOrders();
                _workspace.ShowStatus($"已加载 {_workspace.WorkOrders.Count} 个工单", false);
            }
            catch (Exception ex)
            {
                _workspace.ShowStatus($"刷新失败: {ex.Message}", true);
            }
        }

        private void OnDataChanged(object sender, MesDataChangedEventArgs e)
        {
            if (!e.Has(MesDataScope.WorkOrder) && !e.Has(MesDataScope.Sn))
            {
                return;
            }

            Application.Current?.Dispatcher.Invoke(() => _workspace.ReloadWorkOrders());
        }

        private void AddWorkOrder()
        {
            try
            {
                var dialog = new WorkOrderDialog();
                if (dialog.ShowDialog() == true)
                {
                    var workOrder = dialog.WorkOrder;
                    if (DatabaseHelper.InsertWorkOrderInfo(workOrder))
                    {
                        _workspace.ShowStatus("工单创建成功", false);
                        _workspace.ReloadWorkOrders();
                    }
                    else
                    {
                        _workspace.ShowStatus("创建失败", true);
                    }
                }
            }
            catch (Exception ex)
            {
                _workspace.ShowStatus($"创建失败: {ex.Message}", true);
            }
        }

        private void EditWorkOrder()
        {
            if (SelectWorkOrderInfo == null)
            {
                _workspace.ShowStatus("请先选择要修改的工单", true);
                return;
            }
            try
            {
                var dialog = new WorkOrderDialog(SelectWorkOrderInfo) { Owner = Application.Current?.MainWindow };
                if (dialog.ShowDialog() == true)
                {
                    var workOrder = dialog.WorkOrder;
                    if (DatabaseHelper.UpdateWorkOrderInfo(workOrder))
                    {
                        _workspace.ShowStatus("工单修改成功", false);
                        _workspace.ReloadWorkOrders();
                    }
                    else
                    {
                        _workspace.ShowStatus("修改失败", true);
                    }
                }
            }
            catch (Exception ex)
            {
                _workspace.ShowStatus($"修改失败: {ex.Message}", true);
            }
        }

        private void DeleteWorkOrder()
        {
            if (SelectWorkOrderInfo == null)
            {
                _workspace.ShowStatus("请先选择要删除的工单", true);
                return;
            }

            var result = MessageBox.Show($"确定要删除工单 {SelectWorkOrderInfo.WorkOrderNo} 吗？",
                "确认删除", MessageBoxButton.YesNo, MessageBoxImage.Warning);

            if (result == MessageBoxResult.Yes)
            {
                try
                {
                    DatabaseHelper.DeleteWorkOrderInfo(SelectWorkOrderInfo);
                    _workspace.ShowStatus("工单已删除", false);
                    _workspace.ReloadWorkOrders();
                }
                catch (Exception ex)
                {
                    _workspace.ShowStatus($"删除失败: {ex.Message}", true);
                }
            }
        }
    }
}