using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Input;

using BeWo.Annotations;

using BS.Shared.Core;
using BS.Shared.DataContracts;
using BS.Shared.Extensions;

namespace BeWo.View.Search
{
    public partial class TextModuleTreeSearchView : INotifyPropertyChanged
    {
        private BindingList<TextModuleDC> _List;
        private readonly List<TextModuleDC> _AllTextModules = new List<TextModuleDC>();

        public BindingList<TextModuleDC> List
        {
            get => _List ?? new BindingList<TextModuleDC>();

            set
            {
                _List = value;
                OnPropertyChanged(nameof(List));
            }
        }

        public TextModuleTreeSearchView()
        {
            InitializeComponent();
            DataContext = this;
        }

        public void InitSearchView(List<TextModuleDC> pAllTextModules)
        {
            _AllTextModules.Clear();
            _AllTextModules.AddRange(pAllTextModules);
            List = new BindingList<TextModuleDC>(_AllTextModules);
        }

        public long ServiceCategoryOid { get; set; }

        public TextModuleDC SelectedItem { get; set; }

        public event EventHandler<EventArgs<TextModuleDC>> ItemSelected;
        public event PropertyChangedEventHandler PropertyChanged;

        [NotifyPropertyChangedInvocator]
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        private void TreeListControl_OnPreviewMouseDown(object sender, MouseButtonEventArgs e)
        {
            var hitInfo = TreeListView.CalcHitInfo(e.OriginalSource as DependencyObject);
            if(hitInfo.InRowCell)
            {
                SelectedItem = (TextModuleDC)TreeListControl.SelectedItem;

                if(SelectedItem != null && !SelectedItem.IsParent)
                {
                    ItemSelected?.Invoke(this, new EventArgs<TextModuleDC>(SelectedItem));
                }
            }

            e.Handled = false;
        }

        public void UpdateFilteredList()
        {
            if(string.IsNullOrEmpty(TextBoxSearch.Text))
            {
                List = new BindingList<TextModuleDC>(_AllTextModules);
                return;
            }

            var lFilter = TextBoxSearch.Text.ToLower().Split(" ");

            var directHits = _AllTextModules.Where(w => w.Text != null && w.Name != null && (lFilter.Any(w.Text.ToLower().Contains) || lFilter.Any(w.Name.ToLower().Contains))).ToList();

            directHits.AddRangeIfElementsNotIn(Utils.GetParentTextModules(directHits));

            List = new BindingList<TextModuleDC>(directHits);
        }
        
        private void TextBoxSearch_OnTextChanged(object sender, TextChangedEventArgs e)
        {
            UpdateFilteredList();
        }
    }

    public class TextModuleFontWeightConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var isParent = value != null && (bool) value;

            return isParent ? FontWeights.Bold : FontWeights.Normal;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}