using System;

using System.Linq;

using System.Windows;

using XmlStudio.ViewModel.Node;

using XmlStudio.DataLayer;

using System.Collections.Generic;

using XmlStudio.Interfaces;

using System.Windows.Data;

using System.Windows.Controls;

using System.Text;



namespace XmlStudio.Dialogs {

    /// <summary>

    /// Interaction logic for AddXsdAttributeDialog.xaml

    /// </summary>

    public partial class AddXsdAttributeDialog : Window {

        #region Properties

        /// <summary>

        /// Gets the <see cref="XmlAttributeViewModel"/> as a new attribute.

        /// </summary>

        public XsdAttributeViewModel Attribute {

            get;

            set;

        }



        public IEnumerable<IBigXmlAttribute> OptionalAttributes {

            get { return XsdAttributeFactory.ListOptionalAttributes(this.ElementType).Union(XsdAttributeFactory.ListRequiredAttributes(this.ElementType)); }

        }



        /// <summary>

        /// Gets or sets the type of element being edited.

        /// </summary>

        public XsdElement ElementType { get; set; }

        #endregion



        #region Fields

        IXsdModel model;

        #endregion



        #region Constructors

        /// <summary>

        /// Initializes a new instance of the <see cref="AddAttributeDialog"/> class.

        /// </summary>

        public AddXsdAttributeDialog(XsdElement elementType, IXsdModel model) {

            this.ElementType = elementType;

            this.model = model;

            InitializeComponent();



            this.UpdateValues(this.SelectedAttributeName, this.ElementType);

        }



        public AddXsdAttributeDialog(XsdElement elementType, XsdAttributeViewModel attribute, IXsdModel model) {

            this.ElementType = elementType;

            this.Attribute = attribute;

            this.model = model;

            InitializeComponent();



            this.SelectAttributeName(attribute.LocalName);

            this.UpdateValues(attribute.LocalName, elementType);

            this.SelectValue(attribute.Value);

        }

        #endregion



        #region Properties

        private bool IsValueComboBoxVisible {

            get {

                if(this.localValuesComboBox.Visibility == System.Windows.Visibility.Visible) {

                    return true;

                }



                return false;

            }

        }



        private bool IsValueListBoxVisible {

            get {

                if(this.localValuesListBox.Visibility == System.Windows.Visibility.Visible) {

                    return true;

                }



                return false;

            }

        }



        private bool IsValueTextBoxVisible {

            get {

                if(this.valueTextBox.Visibility == System.Windows.Visibility.Visible) {

                    return true;

                }



                return false;

            }

        }



        private string SelectedAttributeName {

            get { return this.localNameComboBox.SelectedValue.ToString(); }

        }



        private string SelectedPrefix {

            get { return this.prefixTextBox.Text; }

        }



        private string SelectedNamespaceUri {

            get { return this.namespaceURITextBox.Text; }

        }

        #endregion



        #region Event handlers

        protected override void OnInitialized(EventArgs e) {

            base.OnInitialized(e);



            this.prefixTextBox.Focus();

        }



        private void OnSubmit(object sender, RoutedEventArgs e) {

            this.Attribute = new XsdAttributeViewModel {

                LocalName = this.SelectedAttributeName,

                Prefix = this.SelectedPrefix,

                NamespaceURI = this.SelectedNamespaceUri,

                Value = this.GetValue(),

                Required = this.Attribute != null ? this.Attribute.Required : false

            };



            this.DialogResult = true;

            this.Close();

        }



        private void OnLocalNameComboBoxSelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e) {

            var attributeName = localNameComboBox.SelectedValue as string;

            UpdateValues(attributeName, this.ElementType);

        }

        #endregion



        #region Helper methods

        private void SelectAttributeName(string attributeName) {

            this.localNameComboBox.SelectedValue = attributeName;

        }



        private void SelectValue(string value) {

            if(this.IsValueComboBoxVisible) {

                this.localValuesComboBox.SelectedValue = value;

            } else if(this.IsValueListBoxVisible) {

                var values = value.Split(' ');

                foreach(var v in values) {

                    localValuesListBox.SelectedItems.Add(v);

                }

            } else {

                this.valueTextBox.Text = value;

            }

        }



        private string GetValue() {

            if(this.IsValueComboBoxVisible) {

                return localValuesComboBox.SelectedValue.ToString();

            } else if(this.IsValueListBoxVisible) {

                var sb = new StringBuilder();

                var selectedItems = localValuesListBox.SelectedItems;

                foreach(var item in selectedItems) {

                    sb.Append(" " + item.ToString());

                }



                return sb.ToString().Substring(1, sb.Length - 1);

            } else {

                return valueTextBox.Text;

            }

        }



        private void UpdateValues(string attributeName, XsdElement elementType) {

            // try to get values bindable to combobox -> these are available only for certain attributes

            var binding = BindReferencableElements(attributeName, elementType, this.model);

            if(binding.Source != null) {

                // if we have values for combobox but attribute name is memberTypes, show the listbox insted

                if(attributeName == "memberTypes" && this.ElementType == XsdElement.Union) {

                    localValuesListBox.SetBinding(ListBox.ItemsSourceProperty, binding);

                    ShowValueListBox();

                    HideValueComboBox();

                    HideValueTextBox();

                } else {

                    localValuesComboBox.SetBinding(ComboBox.ItemsSourceProperty, binding);

                    localValuesComboBox.SelectedIndex = 0;

                    ShowValueComboBox();

                    HideValueListBox();

                    HideValueTextBox();

                }

            } else {

                HideValueComboBox();

                HideValueListBox();

                ShowValueTextBox();

            }

        }



        #region Data

        public static IEnumerable<string> GetBuiltInTypes(IXsdModel model) {

            if(!string.IsNullOrEmpty(model.XsPrefix)) {

                return model.ListBuiltInDataTypes().Select(x => string.Format("{0}:{1}", model.XsPrefix, XsdDataTypeHelper.GetTypeName(x)));

            } else {

                return model.ListBuiltInDataTypes().Select(x => XsdDataTypeHelper.GetTypeName(x));

            }

        }



        public static Binding BindReferencableElements(string attributeName, XsdElement elementType, IXsdModel model) {

            var binding = new Binding();

            binding.Mode = BindingMode.OneWay;



            switch(attributeName) {

                case "ref":

                    switch(elementType) {

                        case XsdElement.Attribute: {

                                binding.Source = model.NamedAttributes;

                            }

                            break;

                        case XsdElement.AttributeGroup: {

                                binding.Source = model.NamedAttributeGroups;

                            }

                            break;

                        case XsdElement.Element: {

                                binding.Source = model.NamedElements;

                            }

                            break;

                        case XsdElement.Group: {

                                binding.Source = model.NamedGroups;

                            }

                            break;

                    }

                    break;

                case "type":

                    switch(elementType) {

                        case XsdElement.Attribute:

                            binding.Source = GetBuiltInTypes(model).Union(model.NamedSimpleTypes);

                            break;

                        case XsdElement.Element:

                            binding.Source = GetBuiltInTypes(model).Union(model.NamedSimpleTypes).Union(model.NamedComplexTypes);

                            break;

                    }

                    break;

                case "substitutionGroup":

                    switch(elementType) {

                        case XsdElement.Element:

                            binding.Source = model.NamedElements;

                            break;

                    }

                    break;

                case "base":

                    switch(elementType) {

                        case XsdElement.Extension:

                            binding.Source = GetBuiltInTypes(model).Union(model.NamedSimpleTypes).Union(model.NamedComplexTypes);

                            break;

                        case XsdElement.Restriction:

                            binding.Source = GetBuiltInTypes(model).Union(model.NamedSimpleTypes).Union(model.NamedComplexTypes);

                            break;

                    }

                    break;

                case "refer":

                    switch(elementType) {

                        case XsdElement.KeyRef:

                            binding.Source = model.NamedKeyElements.Union(model.NamedUniqueElements);

                            break;

                    }

                    break;

                case "itemType":

                    switch(elementType) {

                        case XsdElement.List:

                            binding.Source = GetBuiltInTypes(model).Union(model.NamedSimpleTypes);

                            break;

                    }

                    break;

                case "memberTypes":

                    switch(elementType) { // listbox

                        case XsdElement.Union:

                            binding.Source = GetBuiltInTypes(model).Union(model.NamedSimpleTypes);

                            break;

                    }

                    break;

            }



            return binding;

        }

        #endregion



        #region Hiding

        private void HideValueComboBox() {

            if(localValuesComboBox != null) {

                localValuesComboBox.Visibility = System.Windows.Visibility.Collapsed;

            }

        }



        private void HideValueListBox() {

            if(localValuesListBox != null) {

                localValuesListBox.Visibility = System.Windows.Visibility.Collapsed;

            }

        }



        private void HideValueTextBox() {

            if(valueTextBox != null) {

                valueTextBox.Visibility = System.Windows.Visibility.Collapsed;

            }

        }

        #endregion



        #region Showing

        private void ShowValueComboBox() {

            if(localValuesComboBox != null) {

                localValuesComboBox.Visibility = System.Windows.Visibility.Visible;

            }

        }



        private void ShowValueListBox() {

            if(localValuesListBox != null) {

                localValuesListBox.Visibility = System.Windows.Visibility.Visible;

            }

        }



        private void ShowValueTextBox() {

            if(valueTextBox != null) {

                valueTextBox.Visibility = System.Windows.Visibility.Visible;

            }

        }

        #endregion

        #endregion

    }

}