using bsmd.database;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;

namespace ENI2.Controls
{
    /// <summary>
    /// Interaction logic for HazardMaterialControl.xaml
    /// </summary>
    public partial class HazardMaterialControl : UserControl
    {
        public HazardMaterialControl()
        {
            InitializeComponent();
            this.dataGridHazardMaterial.ItemsSource = HAZPosTemplate.Templates;
            var view = CollectionViewSource.GetDefaultView(HAZPosTemplate.Templates);
            view.SortDescriptions.Add(new SortDescription(nameof(HAZPosTemplate.Description), ListSortDirection.Ascending));
            _ = HAZPosTemplate.EnsureLoadedAsync();

            this.columnHazard.ItemsSource = BuildEnumItems(IBCPosition.hazards);
            this.columnFlashpoint.ItemsSource = BuildEnumItems(IBCPosition.flashpointInformations);
            this.columnPollution.ItemsSource = BuildEnumItems(IBCPosition.pollutionCategories);
            this.columnIMSBC_HAZ.ItemsSource = BuildEnumItems(IMSBCPosition.hazardClass);
            this.columnTemplateType.ItemsSource = Enum.GetValues(typeof(HAZPosTemplate.SublistType));

            this.dataGridHazardMaterial.ContextMenu = new ContextMenu();
            MenuItem addItem = new MenuItem
            {
                Header = Properties.Resources.textAdd,
                Icon = new System.Windows.Controls.Image { Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/Resources/add.png")) }
            };
            addItem.Click += AddItem_Click;
            this.dataGridHazardMaterial.ContextMenu.Items.Add(addItem);

            MenuItem delItem = new MenuItem
            {
                Header = Properties.Resources.textDelete,
                Icon = new System.Windows.Controls.Image { Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("pack://application:,,,/Resources/delete.png")) }
            };
            delItem.Click += DelItem_Click;
            this.dataGridHazardMaterial.ContextMenu.Items.Add(delItem);
        }

        private void buttonSave_Click(object sender, RoutedEventArgs e)
        {
            _ = SaveTemplatesAsync();
        }

        private void buttonAdd_Click(object sender, RoutedEventArgs e)
        {
            AddNewTemplate();
        }

        private void dataGridHazardMaterial_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
        {
            if (e.Row?.Item is HAZPosTemplate template)
            {
                template.IsDirty = true;
            }
        }

        private void AddItem_Click(object sender, RoutedEventArgs e)
        {
            AddNewTemplate();
        }

        private async void DelItem_Click(object sender, RoutedEventArgs e)
        {
            if (this.dataGridHazardMaterial.SelectedItems.Count > 0)
            {
                if (MessageBox.Show("Are you sure to delete the selected values?", Properties.Resources.textConfirmation, MessageBoxButton.YesNo, MessageBoxImage.Question, MessageBoxResult.No) ==
                        MessageBoxResult.Yes)
                {
                    var selectedItems = new List<HAZPosTemplate>();
                    foreach (HAZPosTemplate item in this.dataGridHazardMaterial.SelectedItems)
                        selectedItems.Add(item);

                    foreach (HAZPosTemplate item in selectedItems)
                    {
                        int result = await DBManagerAsync.DeleteAsync(item);
                        if (result == 1 || item.IsNew)
                        {
                            HAZPosTemplate.Templates.Remove(item);
                        }
                    }
                }
            }
        }

        private void AddNewTemplate()
        {
            var template = new HAZPosTemplate
            {
                TemplateType = HAZPosTemplate.SublistType.IMSBC,
                IsDirty = true
            };
            HAZPosTemplate.Templates.Add(template);
            this.dataGridHazardMaterial.SelectedItem = template;
            this.dataGridHazardMaterial.ScrollIntoView(template);
        }

        private async Task SaveTemplatesAsync()
        {
            int totalSaves = 0;
            foreach (var template in HAZPosTemplate.Templates)
            {
                if (template.IsNew || template.IsDirty)
                {
                    totalSaves += await DBManagerAsync.SaveAsync(template);
                }
            }
            if (totalSaves > 0)
            {
                MessageBox.Show($"{totalSaves} hazard materials saved", "Success", MessageBoxButton.OK, MessageBoxImage.Information);
            }
        }

        private static List<KeyValuePair<int, string>> BuildEnumItems(IReadOnlyList<string> values)
        {
            var items = new List<KeyValuePair<int, string>>(values.Count);
            for (int i = 0; i < values.Count; i++)
            {
                items.Add(new KeyValuePair<int, string>(i, values[i]));
            }
            return items;
        }
    }
}