using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using CommunityToolkit.Mvvm.ComponentModel;

namespace SZBIM.StandardTools
{
    public partial class TreeModel : ObservableObject, IComparable
    {
        /// <summary>
        ///     构造
        /// </summary>
        public TreeModel()
        {
            Children = new ObservableCollection<TreeModel>();
            isChecked = false;
            Icon = "./Resources/File_16px.png";
            //Icon = FamilyPlugins.Properties.Resources.Folder_32px;
            IsExpanded = false;
        }


        /// <summary>
        ///     选中状态
        /// </summary>
        [ObservableProperty]
        private bool? isChecked;

        /// <summary>
        ///     折叠状态
        /// </summary>
        [ObservableProperty]
        private bool isExpanded;


        /// <summary>
        ///     指针悬停时的显示说明
        /// </summary>
        public string ToolTip
        {
            get
            {
                if (Parent == null)
                {
                    return string.Format(Name);
                }

                return $"{Parent.Name}-{Name}";
                //return String.Format(Name);
            }
        }

        /// <summary>
        ///     子项
        /// </summary>
        public IList<TreeModel> Children { get; set; }

        public object Tag { get; set; }

        /// <summary>
        ///     键值
        /// </summary>
        public string Id { get; set; }

        /// <summary>
        ///     显示的字符
        /// </summary>
        public string Name { get; set; }

        /// <summary>
        ///     图标
        /// </summary>
        public string Icon { get; set; }

        /// <summary>
        ///     父项
        /// </summary>
        public TreeModel Parent { get; set; }


        /// <summary>
        ///     排序
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public int CompareTo(object obj)
        {
            TreeModel treeModel = (TreeModel)obj;

            int result;
            if (Name == treeModel.Name)
            {
                result = 0;
            }
            else
            {
                if (Name.CompareTo(treeModel.Name) > 0)
                {
                    result = 1;
                }
                //else if (this.Name == treeModel.Name)
                //{
                //    result = 1;
                //}
                else
                {
                    result = -1;
                }
            }

            return result;
        }


        /// <summary>
        ///     设置所有子项的选中状态
        /// </summary>
        public void SetChildrenChecked()
        {
            if (Children != null && Children.Count > 0 && IsChecked != null)
            {
                foreach (TreeModel child in Children)
                {
                    child.IsChecked = IsChecked;
                    if (child.Children != null && Children.Count > 0)
                    {
                        child.SetChildrenChecked();
                    }
                }
            }
        }


        /// <summary>
        ///     设置所有子项的选中状态
        /// </summary>
        /// <param name="isCheck"></param>
        public void SetChildrenChecked(bool isCheck)
        {
            if (Children != null && Children.Count > 0)
            {
                foreach (TreeModel child in Children)
                {
                    child.IsChecked = isCheck;
                    if (child.Children != null && Children.Count > 0)
                    {
                        child.SetChildrenChecked(isCheck);
                    }
                }
            }
        }


        /// <summary>
        ///     设置所有子项展开状态
        /// </summary>
        /// <param name="isExpanded"></param>
        public void SetChildrenExpanded(bool isExpanded)
        {
            foreach (TreeModel child in Children)
            {
                child.IsExpanded = isExpanded;
                child.SetChildrenExpanded(isExpanded);
            }
        }


        /// <summary>
        ///     使父节点处于选中状态
        /// </summary>
        public void SetParentChecked()
        {
            if (Parent != null)
            {
                if (Parent.Children.Count(c => c.IsChecked == null) > 0)
                {
                    Parent.IsChecked = null;
                }
                else if (Parent.Children.Count(c => c.IsChecked == true) == 0)
                {
                    Parent.IsChecked = false;
                }
                else if (Parent.Children.Count(c => c.IsChecked == true) == Parent.Children.Count)
                {
                    Parent.IsChecked = true;
                }
                else if (Parent.Children.Count(c => c.IsChecked == true) < Parent.Children.Count)
                {
                    Parent.IsChecked = null;
                }

                if (Parent.Parent != null)
                {
                    Parent.SetParentChecked();
                }
            }
        }
    }
}