using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using TEAMModelOS.Model.Core.Models;
using TEAMModelOS.Model.Syllabus.Dtos;
using TEAMModelOS.Model.Syllabus.Models;
using TEAMModelOS.SDK.Context.Exception;
using TEAMModelOS.SDK.Helper.Common.CollectionHelper;
using TEAMModelOS.SDK.Helper.Common.JsonHelper;
using TEAMModelOS.SDK.Module.AzureTable.Interfaces;
using TEAMModelOS.Service.Syllabus.Interfaces;

namespace TEAMModelOS.Service.Syllabus.Implements
{
    public class SyllabusService : ISyllabusService
    {

        private IAzureTableDBRepository _azureTableDBRepository;
        private IHttpContextAccessor _httpContextAccessor;
        public SyllabusService(IAzureTableDBRepository azureTableDBRepository , IHttpContextAccessor httpContextAccessor) {
            _azureTableDBRepository = azureTableDBRepository;
            _httpContextAccessor = httpContextAccessor;
        }


        public async Task<List<SyllabusTree>> SaveOrUpdateAll(List<SyllabusTree> trees)
        {
            List<SyllabusTree> nodes = new List<SyllabusTree>();
            TreeToList(trees, nodes);
            List<SyllabusNode> nods = MessagePackHelper.JsonToObject<List<SyllabusNode>>(MessagePackHelper.ObjectToJson(nodes));
            await _azureTableDBRepository.SaveOrUpdateAll<SyllabusNode>(nods);
            List<SyllabusTree> treess = ListToTree(nods);
            return treess;
           // return Task.Factory.StartNew(() => { return treess; });
        }

        public List<SyllabusTree> TreeToList(List<SyllabusTree> trees, List<SyllabusTree> nodes)
        {
            nodes.AddRange(MessagePackHelper.JsonToObject<List<SyllabusTree>>(MessagePackHelper.ObjectToJson(trees)));
            foreach (SyllabusTree tree in trees)
            {
                if (null != tree.Children && tree.Children.Count > 0)
                {
                    TreeToList(tree.Children, nodes);
                }
            }
            return nodes;
        }

        private  List<SyllabusTree> ListToTree(List<SyllabusNode> noes)
        {
            List<SyllabusTree> list = MessagePackHelper.JsonToObject<List<SyllabusTree>>(MessagePackHelper.ObjectToJson(noes));
 
            var lookup = list.ToDictionary(n => n.RowKey, n => n);
            return GetChild(list, lookup);
        }

        public List<SyllabusTree> GetChild(List<SyllabusTree> list ,Dictionary<string , SyllabusTree> dict) {
            List<SyllabusTree> trees = new List<SyllabusTree>();
            foreach (SyllabusTree node in list) {
              bool flag=  dict.TryGetValue(node.Pid, out SyllabusTree syllabus);
                if (flag && syllabus != null)
                {
                    syllabus.Children.Add(node);
                }
                else {
                    trees.Add(node);
                }
            }
            return trees; 
        }

        public async  Task<SyllabusNode> SaveOrUpdate(SyllabusNode node )
        {

            return await _azureTableDBRepository.SaveOrUpdate<SyllabusNode>(node);
        }
    }
}