using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using TelegramBotBase.Base;
using TelegramBotBase.Form;
using TelegramBotBase.Localizations;

namespace TelegramBotBase.Controls.Inline
{
    public class TreeView : ControlBase
    {
        public List<TreeViewNode> Nodes { get; set; }

        public TreeViewNode SelectedNode { get; set; }

        public TreeViewNode VisibleNode { get; set; }

        public string Title { get; set; }

        private int? MessageId { get; set; }

        public string MoveUpIcon { get; set; } = Default.Language["TreeView_LevelUp"];

        public TreeView()
        {
            Nodes = new List<TreeViewNode>();
            Title = Default.Language["TreeView_Title"];
        }


        public override async Task Action(MessageResult result, string value = null)
        {
            await result.ConfirmAction();

            if (result.Handled)
                return;

            var val = result.RawData;

            switch (val)
            {
                case "up":
                case "parent":

                    VisibleNode = (VisibleNode?.ParentNode);

                    result.Handled = true;

                    break;
                default:

                    var n = (VisibleNode != null ? VisibleNode.FindNodeByValue(val) : Nodes.FirstOrDefault(a => a.Value == val));

                    if (n == null)
                        return;


                    if (n.ChildNodes.Count > 0)
                    {
                        VisibleNode = n;
                    }
                    else
                    {
                        SelectedNode = (SelectedNode != n ? n : null);
                    }

                    result.Handled = true;


                    break;

            }

        }


        public override async Task Render(MessageResult result)
        {
            var startnode = VisibleNode;

            var nodes = (startnode?.ChildNodes ?? Nodes);

            var bf = new ButtonForm();

            if (startnode != null)
            {
                bf.AddButtonRow(new ButtonBase(MoveUpIcon, "up"), new ButtonBase(startnode.Text, "parent"));
            }

            foreach (var n in nodes)
            {
                var s = n.Text;
                if (SelectedNode == n)
                {
                    s = "[ " + s + " ]";
                }

                bf.AddButtonRow(new ButtonBase(s, n.Value, n.Url));
            }



            if (MessageId != null)
            {
                var m = await Device.Edit(MessageId.Value, Title, bf);
            }
            else
            {
                var m = await Device.Send(Title, bf);
                MessageId = m.MessageId;
            }
        }

        public string GetPath()
        {
            return (VisibleNode?.GetPath() ?? "\\");
        }


    }
}