using System;
using MECF.Framework.UI.Client.RecipeEditorLib.RecipeModel.Params;
using MECF.Framework.UI.Client.RecipeEditorLib.RecipeModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using DataGridRowEventArgs = ExtendedGrid.Microsoft.Windows.Controls.DataGridRowEventArgs;
using ExDataGridRow = ExtendedGrid.Microsoft.Windows.Controls.DataGridRow;
using MECF.Framework.UI.Client.RecipeEditorLib.DGExtension.CustomColumn;
using System.Collections.Generic;
using DataGridCellEditEndingEventArgs = ExtendedGrid.Microsoft.Windows.Controls.DataGridCellEditEndingEventArgs;
using MECF.Framework.UI.Client.CenterViews.Configs.Roles;
using MECF.Framework.UI.Client.ClientBase;

namespace MECF.Framework.UI.Client.RecipeEditorLib.DGExtension
{
    /// <summary>
    /// Interaction logic for DataGridRecipe.xaml
    /// </summary>
    public partial class DataGridRecipe : UserControl
    {
        #region Constructors

        public DataGridRecipe()
        {
            InitializeComponent();
        }

        #endregion

        #region Properties


        #endregion

        #region Dependency Properties

        #region RecipeData


        public static readonly DependencyProperty RecipeProperty = DependencyProperty.Register(
            nameof(Recipe), typeof(RecipeData), typeof(DataGridRecipe), new PropertyMetadata(default(RecipeData), RecipePropertyChangedCallback));

        private static void RecipePropertyChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is DataGridRecipe dg)
            {
                if (e.NewValue is RecipeData recipe)
                {
                    dg.dgCustom.ItemsSource = recipe.Steps;
                    recipe.PropertyChanged += (sender, e) =>
                    {
                        // 同步白名单编辑模式
                        if (e.PropertyName == nameof(RecipeData.IsAccessibleWhitelistEditMode))
                        {
                            dg.dgCustom.IsAccessibleWhitelistEditMode = recipe.IsAccessibleWhitelistEditMode;
                        }

                    };

                    // 创建DataGrid列
                    dg.ClearColumns();
                    foreach (var col in recipe.Columns)
                        dg.AddColumn(col);
                }
                else
                    dg.dgCustom.ItemsSource = null;
            }
        }

        /// <summary>
        /// 设置或返回编辑器正在编辑的Recipe。
        /// </summary>
        public RecipeData Recipe
        {
            get => (RecipeData)GetValue(RecipeProperty);
            set => SetValue(RecipeProperty, value);
        }

        #endregion

        #region FrozenColumnCount

        public static readonly DependencyProperty FrozenColumnCountProperty = DependencyProperty.Register(
            nameof(FrozenColumnCount), typeof(int), typeof(DataGridRecipe), new PropertyMetadata(default(int), FrozenColumnCountPropertyChangedCallback));

        private static void FrozenColumnCountPropertyChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is DataGridRecipe dg)
            {
                if (e.NewValue is int count)
                    dg.dgCustom.FrozenColumnCount = count;
                else
                    dg.dgCustom.FrozenColumnCount = 0;
            }
        }

        /// <summary>
        /// 设置或返回编辑器冻结的列数。
        /// </summary>
        public int FrozenColumnCount
        {
            get => (int)GetValue(FrozenColumnCountProperty);
            set => SetValue(FrozenColumnCountProperty, value);
        }

        #endregion
        
        #endregion

        #region Methods

        private void RowOnSelected(object sender, RoutedEventArgs e)
        {
            if (!(e.Source is ExDataGridRow dgr))
                return;

            if (!(dgr.DataContext is RecipeStep recipeStep))
                return;

            var param = recipeStep.FindParamByControlName(RecipeControlNames.STEP_NO);
            if (param is StepParam sp)
            {
                sp.IsChecked = true;
            }
        }

        private void RowOnUnselected(object sender, RoutedEventArgs e)
        {
            if (!(e.Source is ExDataGridRow dgr))
                return;

            if (!(dgr.DataContext is RecipeStep recipeStep))
                return;

            var param = recipeStep.FindParamByControlName(RecipeControlNames.STEP_NO);
            if (param is StepParam sp)
            {
                sp.IsChecked = false;
            }
        }

        private void ClearColumns()
        {
            dgCustom.Columns.Clear();
        }

        /// <summary>
        /// 生成编辑器的列。
        /// </summary>
        private void AddColumn(EditorDataGridTemplateColumnBase col)
        {
            // 设置ColumnHeaderTemplate和DataGridCellTemplate
            if (string.IsNullOrEmpty(col.StringCellTemplate) == false)
                col.CellTemplate = (DataTemplate)FindResource(col.StringCellTemplate);

            if (string.IsNullOrEmpty(col.StringCellEditingTemplate) == false)
                col.CellEditingTemplate = (DataTemplate)FindResource(col.StringCellEditingTemplate);

            if (string.IsNullOrEmpty(col.StringHeaderTemplate) == false)
                col.HeaderTemplate = (DataTemplate)FindResource(col.StringHeaderTemplate);

            // 通过Columns重建XDataGrid列
            dgCustom.Columns.Add(col);
        }

        /// <summary>
        /// 滚动到并高亮指定的参数单元格。
        /// </summary>
        /// <param name="param"></param>
        public void FocusToParam(IParam param)
        {
            if (param == null)
                return;

            ResetHighlight();

            var row = param.RowOwner;
            var col = param.ColumnOwner;

            if (row != null && col != null)
            {
                dgCustom.ScrollIntoView(param.Parent, col);
                param.Highlight();
            }
        }

        /// <summary>
        /// 清楚当前Recipe中参数的高亮显示效果。
        /// </summary>
        public void ResetHighlight()
        {
            Recipe?.Steps.ResetHighlight();
        }
        
        #endregion


        #region Events

        private void DataGridCell_OnPreviewMouseDown(object sender, MouseButtonEventArgs e)
        {
           
                // 仅在编辑AccessPermissionWhitelist编辑模式下有效。
                if (!Recipe.IsAccessibleWhitelistEditMode)
                    return;

                if (sender is Border bdr && bdr.DataContext is Param param)
                {
                    if (param.IsHighlighted)
                        param.ResetHighlight();
                    else
                        param.Highlight();
                }
        }

        private void DgCustom_OnLoadingRow(object sender, DataGridRowEventArgs e)
        {
            e.Row.Selected += RowOnSelected;
            e.Row.Unselected += RowOnUnselected;

            if (sender is XDataGrid dg && e.Row.DataContext is RecipeStep step)
            {
                for (var i = 0; i < step.Count; i++)
                {
                    step[i].RowOwner = e.Row;
                    step[i].ColumnOwner = dg.Columns[i];
                }
            }
        }

        private void DgCustom_OnUnloadingRow(object sender, DataGridRowEventArgs e)
        {
            e.Row.Selected -= RowOnSelected;
            e.Row.Unselected -= RowOnUnselected;
        }

        private void DgCustom_OnCellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
        {
            if (e.Row.Item is RecipeStep step)
            {
                step.CalculateGasFlow();
                step.Parent.Validate();
            }
        }

        private void Expander_OnExpanded(object sender, RoutedEventArgs e)
        {
            if (sender is Expander expander && expander.DataContext is ExpanderColumn col)
            {
                foreach (var subCol in col.ChildColumns)
                {
                    subCol.UpdateVisibility();
                }
            }
        }

        private void Expander_OnCollapsed(object sender, RoutedEventArgs e)
        {
            if (sender is Expander expander && expander.DataContext is ExpanderColumn col)
            {
                foreach (var subCol in col.ChildColumns)
                {
                    subCol.Visibility = Visibility.Collapsed;
                }
            }
        }

        #endregion



    }
}