using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;

namespace Kingo.Plugin.BGResultManager.ViewModel
{
    public class ResultsCatalog : INotifyPropertyChanged
    {
        public string Name { get; set; }
        public string Path { get; set; }
        public string Desc { get; set; }
        /// <summary>
        /// 拷贝文件原始路径
        /// </summary>
        public string CopyFile { get; set; }
        /// <summary>
        /// IsChecked
        /// </summary>
        ///<remarks></remarks>
        private bool? _isChecked = false;
        public bool? IsChecked
        {
            set
            {
                _isChecked = value;
                if (PropertyChanged != null) PropertyChanged.Invoke(this, new PropertyChangedEventArgs("IsChecked"));
                SetIsCheckedByParent(value);
                if (Parent != null) Parent.SetIsCheckedByChild(value);
            }
            get { return this._isChecked; }
        }
        public ResultsCatalog Parent { get; set; }
        public bool IsExpanded { get; set; }
        public string Type { get; set; }
        /// <summary>
        /// 文件类型（只有当Type=File时有效）
        /// </summary>
        public string FileType { get; set; }
        /// <summary>
        /// 文件模板（只有当Type=File时有效）
        /// </summary>
        public string FileTempalate { get; set; }
        public List<ResultsCatalog> SubCatalog { get; set; }

        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }

        /// <summary>
        /// 子节点的isChecked改变了, 通知父节点是否要跟着改变 isChecked
        /// </summary>
        /// <param name="value"></param>
        public virtual void SetIsCheckedByChild(bool? value)
        {
            if (this._isChecked == value)
            {
                return;
            }

            bool isAllChildrenChecked = this.SubCatalog.All(c => c.IsChecked == value);
            if (!isAllChildrenChecked)
            {
                this._isChecked = null;
            }
            else
            {
                this._isChecked = value;
            }
            if (PropertyChanged != null) PropertyChanged.Invoke(this, new PropertyChangedEventArgs("IsChecked"));
            if (Parent != null) Parent.SetIsCheckedByChild(value);
        }

        /// <summary>
        /// 父节点isChecked改变了, 所有子节点跟着改变
        /// </summary>
        /// <param name="value"></param>
        public virtual void SetIsCheckedByParent(bool? value)
        {
            this._isChecked = value;
            if (PropertyChanged != null) PropertyChanged.Invoke(this, new PropertyChangedEventArgs("IsChecked"));
            if (SubCatalog == null)
            {
                return;
            }
            foreach (var child in SubCatalog)
            {
                child.SetIsCheckedByParent(value);
            }
        }
    }
}