// Copyright (c) 2017 schick Informatik
// Description: Basisklasse für Bearbeitungsfensterle
// Position merken usw.

using System;
using System.Windows;
using System.Windows.Controls;
using System.ComponentModel;
using System.Text.RegularExpressions;

using Xceed.Wpf.Toolkit;

using bsmd.database;
using ENI2.Util;

namespace ENI2.Controls
{
    /// <summary>
    /// Basisklasse aller Bearbeitungsdialoge. OK/Cancel Buttons und Window Placement
    /// </summary>
    [TemplatePart(Name = "buttonOK", Type = typeof(Button))]
    [TemplatePart(Name = "buttonCancel", Type = typeof(Button))]
    [TemplatePart(Name = "buttonAdd", Type = typeof(Button))]
    public class EditWindowBase : Window
    {

        public event Action OKClicked;
        public event Action CancelClicked;
        public event Action AddClicked;
        private static readonly Regex rdt = new Regex(@"^(\d{12})$");
        private static readonly Regex rd = new Regex(@"^(\d{8})$");
        protected bool shouldCancel;

        static EditWindowBase()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(EditWindowBase), new FrameworkPropertyMetadata(typeof(EditWindowBase)));
        }

        public EditWindowBase()
        {
            Loaded += (_, __) =>
                    {
                        var okButton = (Button)Template.FindName("buttonOK", this);
                        var cancelButton = (Button)Template.FindName("buttonCancel", this);
                        var addButton = (Button)Template.FindName("buttonAdd", this);
                        okButton.Click += (s, e) => { if (this.IsModal()) DialogResult = true; OKClicked?.Invoke(); this.Close(); };
                        cancelButton.Click += (s, e) => { if (this.IsModal()) DialogResult = false; CancelClicked?.Invoke(); this.Close(); };
                        addButton.Click += (s, e) => AddClicked?.Invoke();
                        this.Closing += Window_Closing;
                    };
        }

        public bool AddVisible
        {
            get { var addButton = (Button)Template.FindName("buttonAdd", this); return addButton.Visibility == Visibility.Visible; }
            set
            {
                var addButton = (Button)Template.FindName("buttonAdd", this); addButton.Visibility = value ? Visibility.Visible : Visibility.Hidden;
                var okButton = (Button)Template.FindName("buttonOK", this);
                if (okButton.Visibility == Visibility.Hidden)
                    okButton.Width = 1; // we are in a DockPanel, try to collapse okButton to place addButton more to the right
            }
        }

        public bool OkVisible
        {
            get { var okButton = (Button)Template.FindName("buttonOK", this); return okButton.Visibility == Visibility.Visible; }
            set { var okButton = (Button)Template.FindName("buttonOK", this); okButton.Visibility = value ? Visibility.Visible : Visibility.Hidden; }
        }

        private void Window_Closing(object sender, CancelEventArgs e)
        {
            if (this.shouldCancel) e.Cancel = true;
        }

        protected void EnableOK(bool enabled)
        {
            var okButton = (Button)Template.FindName("buttonOK", this);
            okButton.IsEnabled = enabled;
        }

        protected override void OnSourceInitialized(EventArgs e)
        {
            base.OnSourceInitialized(e);
            // this.SetPlacement(..)
        }

        protected virtual void OnOkClicked()
        {
            this.DialogResult = true;
            this.shouldCancel = false;
            OKClicked?.Invoke();
        }

        #region "BHV Spezial" Datetime Parsing..

        protected void DateTimePicker_PreviewKeyUp(object sender, System.Windows.Input.KeyEventArgs e)
        {
            if ((sender is DateTimePicker thePicker) && !thePicker.Text.IsNullOrEmpty() && rdt.IsMatch(thePicker.Text))
            {
                try
                {
                    string timevalText = rdt.Match(thePicker.Text).Captures[0].Value;
                    int day = Int32.Parse(timevalText.Substring(0, 2));
                    int month = Int32.Parse(timevalText.Substring(2, 2));
                    int year = Int32.Parse(timevalText.Substring(4, 4));
                    int hour = Int32.Parse(timevalText.Substring(8, 2));
                    int minute = Int32.Parse(timevalText.Substring(10, 2));
                    thePicker.Value = new DateTime(year, month, day, hour, minute, 0);
                }
                catch (FormatException) { }
                catch (ArgumentOutOfRangeException) { thePicker.Value = null; }
            }
        }

        protected void DateTimePicker_PreviewKeyUpDate(object sender, System.Windows.Input.KeyEventArgs e)
        {
            if ((sender is DatePicker thePicker) && rd.IsMatch(thePicker.Text))
            {
                try
                {
                    string timevalText = rd.Match(thePicker.Text).Captures[0].Value;
                    int day = Int32.Parse(timevalText.Substring(0, 2));
                    int month = Int32.Parse(timevalText.Substring(2, 2));
                    int year = Int32.Parse(timevalText.Substring(4, 4));
                    thePicker.SelectedDate = new DateTime(year, month, day, 0, 0, 0);
                }
                catch (FormatException) { }
                catch (ArgumentOutOfRangeException) { thePicker.SelectedDate = null; }
            }
        }

        #endregion

        #region combobox content filtering

        protected void ComboBox_KeyUp(object sender, System.Windows.Input.KeyEventArgs e)
        {
            ComboBox cmb = sender as ComboBox;
            GlobalStructures.FilterCombobox(cmb, e.Key);
        }

        #endregion

    }
}