using System.Collections.Generic;
using System.Text;
using Znyc.Admin.Commons.Json;

namespace Znyc.Admin.Commons.Tree
{
    /// <summary>
    ///
    /// </summary>
    public static class TreeSelect
    {
        /// <summary>
        ///
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public static string TreeSelectJson(this List<TreeSelectModel> data)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("[");
            sb.Append(TreeSelectJson(data, 0, ""));
            sb.Append("]");
            return sb.ToString();
        }

        /// <summary>
        ///
        /// </summary>
        /// <param name="data"></param>
        /// <param name="ParentId"></param>
        /// <param name="blank"></param>
        /// <returns></returns>
        private static string TreeSelectJson(List<TreeSelectModel> data, int ParentId, string blank)
        {
            StringBuilder sb = new StringBuilder();
            List<TreeSelectModel> ChildNodeList = data.FindAll(t => t.ParentId == ParentId);
            string tabline = "";
            if (!string.IsNullOrEmpty(ParentId.ToString()))
            {
                tabline = "　　";
            }

            if (ChildNodeList.Count > 0)
            {
                tabline = tabline + blank;
            }

            foreach (TreeSelectModel entity in ChildNodeList)
            {
                entity.text = tabline + entity.text;
                string strJson = entity.ToJson();
                sb.Append(strJson);
                sb.Append(TreeSelectJson(data, entity.Id, tabline));
            }

            return sb.ToString().Replace("}{", "},{");
        }
    }
}