using System;
using System.Collections.Generic;
using System.Linq;
using Robust.Client.AutoGenerated;
using Robust.Client.UserInterface.Controls;
using Robust.Client.UserInterface.CustomControls;
using Robust.Client.UserInterface.XAML;
using Robust.Shared.Localization;
using Robust.Shared.Maths;

namespace Robust.Client.ViewVariables
{
    [GenerateTypedNameReferences]
    public partial class ViewVariablesAddComponentWindow : SS14Window
    {
        protected override Vector2? CustomSize => (200f, 300f);

        private string? _lastSearch;
        private string[] _components = Array.Empty<string>();

        public event Action<AddComponentButtonPressedEventArgs>? AddComponentButtonPressed;

        public ViewVariablesAddComponentWindow(IEnumerable<string> components, bool serverside)
        {
            RobustXamlLoader.Load(this);

            Title = Loc.GetString(serverside ? "Add Component [S]" : "Add Component [C]");

            ComponentItemList.OnItemSelected += _ => RefreshAddButton();
            ComponentItemList.OnItemDeselected += _ => RefreshAddButton();
            SearchLineEdit.OnTextChanged += OnSearchTextChanged;
            AddButton.OnPressed += OnAddButtonPressed;

            Populate(components);
        }

        private void RefreshAddButton()
        {
            AddButton.Disabled = !ComponentItemList.GetSelected().Any();
        }

        public void Populate(IEnumerable<string> components)
        {
            _components = components.ToArray();
            Array.Sort(_components);
            Populate(_lastSearch);
        }

        private void Populate(string? search = null)
        {
            _lastSearch = search;
            ComponentItemList.ClearSelected();
            ComponentItemList.Clear();
            AddButton.Disabled = true;

            foreach (var component in _components)
            {
                if(!string.IsNullOrEmpty(search) && !component.Contains(search, StringComparison.InvariantCultureIgnoreCase))
                    continue;

                ComponentItemList.AddItem(component);
            }
        }

        private void OnSearchTextChanged(LineEdit.LineEditEventArgs obj)
        {
            Populate(obj.Text);
        }

        private void OnAddButtonPressed(BaseButton.ButtonEventArgs obj)
        {
            var selected = ComponentItemList.GetSelected().ToArray();

            // Nothing to do here!
            if (selected.Length == 0)
                return;

            var comp = selected[0];

            // This shouldn't really happen.
            if (comp.Text == null)
                return;

            AddComponentButtonPressed?.Invoke(new AddComponentButtonPressedEventArgs(comp.Text));
        }

        public class AddComponentButtonPressedEventArgs : EventArgs
        {
            public string Component { get; }

            public AddComponentButtonPressedEventArgs(string component)
            {
                Component = component;
            }
        }
    }
}