using Akari.Provider.WaveshareUART.Users;
using System.Linq;
using Terminal.Gui;

namespace Akari.Provider.WaveshareUART.Views
{
    public class ManageUsersDisplay : Toplevel
    {
        public UsersManager UsersManager => WaveshareUARTProvider.Instance.UsersManager;

        private ListView _listView;

        public ManageUsersDisplay()
        {
            Init();
        }

        private void Init()
        {
            Modal = true;

            ColorScheme = Colors.Error;

            // Creates the top-level window to show
            var win = new Window("Manage Users")
            {
                X = 0,
                Y = 0,

                // By using Dim.Fill(), it will automatically resize without manual intervention
                Width = Dim.Fill(),
                Height = Dim.Fill()
            };

            win.ColorScheme = Colors.ColorSchemes["Dialog"];

            Add(win);

            // Window Content
            _listView = new ListView()
            {
                X = 2,
                Y = 1,
                Height = Dim.Fill() - 1,
                Width = Dim.Fill(),
                AllowsMarking = true
            };
            _listView.OpenSelectedItem += ListView_OpenSelectedItem;

            UpdateList();

            var addButton = new Button("_Add")
            {
                X = Pos.Right(this) - 54,
                Y = Pos.Bottom(this) - 3
            };
            addButton.Clicked += AddButton_Clicked;

            var deleteButton = new Button("_Delete Selected")
            {
                X = Pos.Right(addButton) + 1,
                Y = Pos.Top(addButton)
            };
            deleteButton.Clicked += DeleteButton_Clicked;

            var deleteAllButton = new Button("Delete All")
            {
                X = Pos.Right(deleteButton) + 1,
                Y = Pos.Top(deleteButton)
            };
            deleteAllButton.Clicked += DeleteAllButton_Clicked;

            var quitButton = new Button("_Quit")
            {
                X = Pos.Right(deleteAllButton) + 1,
                Y = Pos.Top(deleteAllButton)
            };
            quitButton.Clicked += () => { Application.RequestStop(); };

            win.Add(_listView, addButton, deleteButton, deleteAllButton, quitButton);
        }

        private void UpdateList()
        {
            _listView.SetSource(UsersManager.Users.ToList());

            _listView.SetFocus();
        }

        private void ListView_OpenSelectedItem(ListViewItemEventArgs item)
        {

        }

        private void AddButton_Clicked()
        {

        }

        private void DeleteButton_Clicked()
        {
            var marked = UsersManager.Users.Where((_, index) => _listView.Source.IsMarked(index)).ToHashSet();

            if (UsersManager.Remove(marked))
            {
                MessageBox.Query("Delete Users", $"Successfully deleted {marked.Count} user{(marked.Count > 1 ? "s" : "")}", "Ok");
            }
            else
            {
                MessageBox.ErrorQuery("Delete Users", "Can't delete all selected users", "Ok");
            }

            UpdateList();
        }

        private void DeleteAllButton_Clicked()
        {
            if (UsersManager.Clear())
            {
                MessageBox.Query("Delete Users", $"Successfully deleted all users", "Ok");
            }
            else
            {
                MessageBox.Query("Delete Users", $"Can't delete all users", "Ok");
            }

            UpdateList();
        }
    }
}