using Panuon.WPF.UI;
using System;
using System.ComponentModel;
using System.Windows.Controls;

namespace HMI.UI
{
    /// <summary>
    /// ModalWindow.xaml 的交互逻辑
    /// </summary>
    public partial class NumberPanel : WindowX
    {
        public NumberPanel()
        {
            this.DataContext = this;
            InitializeComponent();
        }

        public double? Data { get; private set; }

        private bool _isProcessing;

        protected override void OnClosing(CancelEventArgs e)
        {
            //Press Continue Button
            if (DialogResult == true)
            {
                if (_isProcessing)
                {
                    e.Cancel = true;
                    return;
                }
                try
                {

                }
                catch (Exception ex)
                {

                    return;
                }
                finally
                {
                    _isProcessing = false;
                }
            }
            base.OnClosing(e);
        }

        private void Button_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            Button btn = sender as Button;
            switch (btn.Tag.ToString())
            {
                case "LeftArrow":
                    break;
                case "RightArrow":
                    break;
                case "AC":
                    NiNumber.Text = null;
                    break;
                case "Backspace":
                    HandleBackspace();
                    break;
                case "Enter":
                    DialogResult = true;
                    Data = double.Parse(NiNumber.Text);
                    this.Close();
                    break;
                case "ESC":
                    DialogResult = false;
                    this.Close();
                    break;
                case "-":
                    var str = NiNumber.Text;
                    if (string.IsNullOrEmpty(str))
                    {
                        NiNumber.Text = "-";
                    }
                    else if (str.StartsWith("-"))
                    {
                        NiNumber.Text = str.Replace("-", "");
                    }
                    else
                    {
                        NiNumber.Text = "-" + str;
                    }
                    break;
                case ".":
                    HandleDot();
                    break;
                default:
                    HandleNumberInput(btn.Tag.ToString());
                    break;
            }
        }

        private void HandleBackspace()
        {
            var str = NiNumber.Text?.ToString();
            if (string.IsNullOrEmpty(str))
            {
                return;
            }
            else
            {
                NiNumber.Text = str.Substring(0, str.Length - 1);
            }
        }

        private void HandleDot()
        {
            var str = NiNumber.Text?.ToString();
            if (string.IsNullOrEmpty(str) || str.IndexOf(".") > 0)
            {
                return;
            }
            else
            {
                NiNumber.Text = str + ".";
            }
        }

        public bool? Open(string dataStr)
        {
            try
            {
                Data = double.Parse(dataStr);
                NiNumber.Text = dataStr;
            }
            catch (Exception ex)
            {
                Data = null;
                NiNumber.Text = null;
            }
            return this.ShowDialog();
        }

        private void HandleNumberInput(string numStr)
        {
            var str = NiNumber.Text?.ToString();
            if (string.IsNullOrEmpty(str))
            {
                NiNumber.Text = numStr;
            }
            else
            {
                NiNumber.Text = str + numStr;
            }
        }

    }
}