// Copyright (c) 2017 schick Informatik
// Description: Basisklasse für die Detailansichten. Hier sollten Dinge wie Validierung etc. abgehandelt werden
//

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

using Xceed.Wpf.Toolkit;

using bsmd.database;

using ENI2.Util;
using ENI2.Controls;

namespace ENI2
{
    public class DetailBaseControl : UserControl, IHighlightControlContainer
    {

        #region Fields

        protected bool _initialized = false;

        private DependencyPropertyDescriptor _dpTextBox;
        private DependencyPropertyDescriptor _dpDateTimePicker;
        private DependencyPropertyDescriptor _dpDatePicker;
        private DependencyPropertyDescriptor _dpLocode;
        private DependencyPropertyDescriptor _dpCheckbox;
        private DependencyPropertyDescriptor _dpComboboxIndex;
        private DependencyPropertyDescriptor _dpComboboxValue;
        private DependencyPropertyDescriptor _dpNumericUpdown;
        private DependencyPropertyDescriptor _dpIntUpdown;
        
        private readonly Dictionary<Object, Message.NotificationClass> _controlClassDict = new Dictionary<object, Message.NotificationClass>();
        private readonly Dictionary<Message.NotificationClass, Message> _typeMessageDict = new Dictionary<Message.NotificationClass, Message>();

        private static readonly Regex rdt = new Regex(@"^(\d{12})$");
        private static readonly Regex rd = new Regex(@"^(\d{8})$");

        #endregion

        #region enum

        protected enum LocodeState
        {
            UNKNOWN,
            INVALID,
            OK,
            AMBIGUOUS
        }

        #endregion

        #region events

        /// <summary>
        /// Mit diesem event kann ein Listenelement den programmatischen Sprung auf ein anderes Listenelement auslösen
        /// (das wird zunächst nur vom Overview -> Auswahl Meldeklasse verwendet)
        /// </summary>
        public event Action<int> JumpToListElementRequest;

        /// <summary>
        /// Mit diesem Event kann ein Listen-Element einen Reload der gesamten Anmeldung auslösen
        /// </summary>
        public event Action<Guid> RequestReload;

        /// <summary>
        /// Damit kann ein Listenelement eine Validierung der gesamten Anmeldung auslösen (inkl. Highlighting) (auf Knopfdruck)
        /// </summary>
        public event Action RequestValidate;

        /// <summary>
        /// Alle Meldeklassen die auf "zu versenden" stehen werden validiert und falls die Validierung scheitert auf "SUSPEND" gestellt
        /// </summary>
        public event Action RequestSendValidation;

        /// <summary>
        /// Damit kann signalisiert werden, dass die Anmeldung readonly wird (z.B. bei Storno)
        /// </summary>
        public event Action RequestDisable;

        /// <summary>
        /// Damit kann aus einer Anmeldung heraus die Kopier-Logik ausgelöst werden
        /// </summary>
        public event Action RequestCopy;

        /// <summary>
        /// Eine in der Detailansicht enthaltene Meldeklasse hat sich geändert
        /// </summary>
        public event Action<Message.NotificationClass?> NotificationClassChanged;

        /// <summary>
        /// Eine Maske soll neu erzeugt werden weil sich dort "indirekt" etwas geändert hat durch eine Änderung in einer anderen Maske.
        /// (Beispiel Copy HAZA nach HAZD Elemente)
        /// </summary>
        public event Action<string> ResetControlCache;

        #endregion

        #region Properties

        /// <summary>
        /// Core to be edited
        /// </summary>
        public MessageCore Core { get; set; }

        /// <summary>
        /// all messages for this core
        /// </summary>
        public List<Message> Messages { get; set; }

        /// <summary>
        /// particular messages that are edited on this page
        /// </summary>
        public List<Message> ControlMessages { get; } = new List<Message>();

        public bool LockedByOtherUser { get; set; }

        #endregion

        #region public methods

        public virtual void Initialize() {

            _dpTextBox = DependencyPropertyDescriptor.FromProperty(TextBox.TextProperty, typeof(TextBox));
            _dpDateTimePicker = DependencyPropertyDescriptor.FromProperty(Xceed.Wpf.Toolkit.DateTimePicker.ValueProperty, typeof(Xceed.Wpf.Toolkit.DateTimePicker));
            _dpDatePicker = DependencyPropertyDescriptor.FromProperty(DatePicker.SelectedDateProperty, typeof(DatePicker));
            _dpLocode = DependencyPropertyDescriptor.FromProperty(Controls.LocodeControl.LocodeValueProperty, typeof(Controls.LocodeControl));
            _dpCheckbox = DependencyPropertyDescriptor.FromProperty(CheckBox.IsCheckedProperty, typeof(CheckBox));
            _dpComboboxIndex = DependencyPropertyDescriptor.FromProperty(ComboBox.SelectedIndexProperty, typeof(ComboBox));
            _dpComboboxValue = DependencyPropertyDescriptor.FromProperty(ComboBox.SelectedValueProperty, typeof(ComboBox));
            _dpNumericUpdown = DependencyPropertyDescriptor.FromProperty(Xceed.Wpf.Toolkit.DoubleUpDown.ValueProperty, typeof(Xceed.Wpf.Toolkit.DoubleUpDown));
            _dpIntUpdown = DependencyPropertyDescriptor.FromProperty(Xceed.Wpf.Toolkit.IntegerUpDown.ValueProperty, typeof(Xceed.Wpf.Toolkit.IntegerUpDown));            

            foreach(Message message in this.Messages)
            {
                _typeMessageDict[message.MessageNotificationClass] = message;
            }            
        }

        public virtual void SetEnabled(bool enabled)
        {
            this.IsEnabled = enabled;
        }

        #endregion

        #region protected methods

        protected virtual void OnJumpToListElementRequest(int index)
        {
            this.JumpToListElementRequest?.Invoke(index);
        }

        protected virtual void OnRequestReload(Guid coreId)
        {
            this.RequestReload?.Invoke(coreId);
        }

        protected virtual void OnRequestValidate()
        {
            this.RequestValidate?.Invoke();
        }

        protected virtual void OnRequestSendValidation()
        {
            this.RequestSendValidation?.Invoke();
        }

        protected virtual void OnRequestDisable()
        {
            this.RequestDisable?.Invoke();
        }

        protected virtual void OnRequestCopy()
        {
            this.RequestCopy?.Invoke();
        }

        protected virtual void OnControlCacheReset(string messageGroupName)
        {
            this.ResetControlCache?.Invoke(messageGroupName);
        }

        protected virtual void ScrollViewer_PreviewMouseWheel(object sender, System.Windows.Input.MouseWheelEventArgs e)
        {
            ScrollViewer scv = (ScrollViewer)sender;
            scv.ScrollToVerticalOffset(scv.VerticalOffset - e.Delta);
            e.Handled = true;
        }

        #region event handling for control content changes (signal dirty etc)

        protected void RegisterTextboxChange(TextBox textBox, Message.NotificationClass notificationClass)
        {
            this._dpTextBox.AddValueChanged(textBox, this.controlContentChanged);
            this._controlClassDict[textBox] = notificationClass;            
        }

        protected void UnregisterTextboxChange(TextBox textBox)
        {
            this._dpTextBox.RemoveValueChanged(textBox, this.controlContentChanged);
            if (this._controlClassDict.ContainsKey(textBox))
                this._controlClassDict.Remove(textBox);
        }

        protected void RegisterDateTimePickerChange(Xceed.Wpf.Toolkit.DateTimePicker dateTimePicker, Message.NotificationClass notificationClass)        
        {
            this._dpDateTimePicker.AddValueChanged(dateTimePicker, this.controlContentChanged);            
            this._controlClassDict[dateTimePicker] = notificationClass;
        }

        protected void RegisterDatePickerChange(DatePicker datePicker, Message.NotificationClass notificationClass)
        {
            this._dpDatePicker.AddValueChanged(datePicker, this.controlContentChanged);
            this._controlClassDict[datePicker] = notificationClass;
        }

        protected void RegisterLocodeChange(Controls.LocodeControl locodeControl, Message.NotificationClass notificationClass)
        {
            this._dpLocode.AddValueChanged(locodeControl, this.controlContentChanged);
            this._controlClassDict[locodeControl] = notificationClass;
        }

        protected void RegisterCheckboxChange(CheckBox checkBox, Message.NotificationClass notificationClass)
        {
            this._dpCheckbox.AddValueChanged(checkBox, this.controlContentChanged);
            this._controlClassDict[checkBox] = notificationClass;
        }

        protected void RegisterComboboxIndexChange(ComboBox comboBox, Message.NotificationClass notificationClass)
        {
            this._dpComboboxIndex.AddValueChanged(comboBox, this.controlContentChanged);
            this._controlClassDict[comboBox] = notificationClass;            
        }

        protected void RegisterComboboxValueChange(ComboBox comboBox, Message.NotificationClass notificationClass)
        {
            this._dpComboboxValue.AddValueChanged(comboBox, this.controlContentChanged);
            this._controlClassDict[comboBox] = notificationClass;
        }

        protected void RegisterDoubleUpDownChange(Xceed.Wpf.Toolkit.DoubleUpDown doubleUpDown, Message.NotificationClass notificationClass)
        {
            this._dpNumericUpdown.AddValueChanged(doubleUpDown, this.controlContentChanged);
            this._controlClassDict[doubleUpDown] = notificationClass;
        }

        protected void RegisterIntegerUpDownChange(Xceed.Wpf.Toolkit.IntegerUpDown intUpDown, Message.NotificationClass notificationClass)
        {
            this._dpIntUpdown.AddValueChanged(intUpDown, this.controlContentChanged);
            this._controlClassDict[intUpDown] = notificationClass;
        }        

        protected void SublistElementChanged(Message.NotificationClass notificationClass)
        {
            if (_typeMessageDict.ContainsKey(notificationClass))
            {
                if (!_typeMessageDict[notificationClass].IsDirty)
                {
                    if (!_typeMessageDict[notificationClass].IsDirty)
                    {
                        _typeMessageDict[notificationClass].IsDirty = true;
                        // signal this notification class changed..
                        this.OnNotificationClassChanged(notificationClass);
                    }
                }
            }
        }

        protected void OnNotificationClassChanged(Message.NotificationClass? notificationClass)
        {
            this.NotificationClassChanged?.Invoke(notificationClass);
        }

        #region "BHV Spezial" Datetime Parsing..

        protected void DateTimePicker_PreviewKeyUp(object sender, System.Windows.Input.KeyEventArgs e)
        {
            if ((sender is DateTimePicker thePicker) && 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 (Exception) {
                    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 (Exception) {
                    thePicker.SelectedDate = null;
                }
            }
        }

        #endregion

        #endregion

        #region private

        private void controlContentChanged(object ctrl, EventArgs args)
        {
            if (this._controlClassDict.ContainsKey(ctrl))
            {
                Message.NotificationClass notificationClass = this._controlClassDict[ctrl];
                this.SublistElementChanged(notificationClass);                
            }
            else 
            {
                System.Diagnostics.Trace.WriteLine("no notification class registered for control!!");
            }
        }

        #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

        #endregion

        #region IHighlightControlContainer implementation

        public virtual void HighlightErrorMessageContainer()
        {
            //throw new NotImplementedException();
        }

        public virtual void HighlightViolationMessageContainer()
        {
            //throw new NotImplementedException();
        }

        public virtual void HighlightProperty(Message theMessage, string propertyName, string identifier, HighlightService.HighlightStyle style)
        {
            throw new NotImplementedException();
        }

        #endregion

    }
}