using Azure.Cosmos;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using TEAMModelOS.SDK.DI;
using TEAMModelOS.SDK.Extension;
using TEAMModelOS.SDK.Models;
using TEAMModelOS.SDK.Models.Cosmos.Common;

namespace TEAMModelOS.SDK.Services
{
    public static class SyllabusService
    {

        /// <summary>
        /// 根据id查询列表串联id pid的新的关系列表
        /// </summary>
        /// <param name="nodes"></param>
        /// <param name="pid"></param>
        /// <param name="newNodes"></param>
        /// <returns></returns>
        public async static Task<(List<List<IdCode>> idCodes, List<SyllabusTreeNode> tree)> ImportSyllabus(List<List<string>> nodes,string volumeId,string scope ,string code,string creatorId ,string creatorName,string grant_type, AzureCosmosFactory azureCosmos, bool ignoreCharacter = true) { 
            HashSet<Syllabus> syllabuses= new HashSet<Syllabus>();
            string tbname = scope.Equals("school", StringComparison.OrdinalIgnoreCase) ? Constant.School : Constant.Teacher;
            await foreach (var item in azureCosmos.GetCosmosClient().GetContainer(Constant.TEAMModelOS, tbname).GetItemQueryIterator<Syllabus>(queryText: $"select value(c) from c where c.volumeId='{volumeId}'",
                        requestOptions: new QueryRequestOptions() { PartitionKey = new Azure.Cosmos.PartitionKey($"Syllabus-{code}") })) {
                syllabuses.Add(item);
            }
            Volume volume = await azureCosmos.GetCosmosClient().GetContainer(Constant.TEAMModelOS, tbname).ReadItemAsync<Volume>($"{volumeId}", new PartitionKey($"Volume-{code}"));

            HashSet<Syllabus> chapters = new HashSet<Syllabus>();
            long now= DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
            List<List<IdCode> > resNodes = new List<List<IdCode>>();
            foreach (var points in nodes) {
                // points 作为 层级路径   ["汽车考照", "汽车法规","驾驶道德、交通安全常识及行车安全检查与维护"] 
                int level = 0;
                // 根节点 作为章节进行当前 路径操作的主要对象
                Syllabus chapter = null;
                //用于记录  ["汽车考照", "汽车法规","驾驶道德、交通安全常识及行车安全检查与维护"]  标题的id 路径
                List<(string title, string id)> nodesVal = new List<(string title, string id)>();
                //上一次操作的 id 用于方便检索下一层级时作为pid  
                string lastId =null;
                foreach (var point in points) {
                    string express = "[ \\[ \\] \\^ \\-|（）【】/' {}_*×――(^)$%~!@#$…&%￥—+=<>《》!！??？:：•`·、。，；,.;\"‘’“”-]";
                    //是否开启特殊符号的正则过滤
                    string pt = ignoreCharacter? Regex.Replace(point, express, ""):point;
                    if (level == 0)
                    {
                        var sylbs = syllabuses.SelectMany(z => z.children).Where(c => c.pid.Equals(volumeId) && pt.Equals(ignoreCharacter? Regex.Replace(c.title, express, ""): c.title));
                        if (sylbs.Any())
                        {
                            //找到相关的章节
                            chapter = syllabuses.Where(z=>z.id.Equals(sylbs.First().id)).FirstOrDefault();
                            if (chapter == null )
                            {
                                foreach (var item in syllabuses)
                                {
                                    var it = item.children.Find(z => z.id.Equals(sylbs.First().id));
                                    if (it != null)
                                    {
                                        item.id = sylbs.First().id;
                                        chapter = item;
                                        chapters.Add(chapter);
                                        lastId = item.id;
                                        nodesVal.Add((point, item.id));
                                        break;
                                    }
                                }
                            }
                            else {
                                chapters.Add(chapter);
                                lastId = chapter.id;
                                nodesVal.Add((point, sylbs.First().id));
                            }
                        }
                        else {
                            //未找到相关的章节
                            string id = id = Guid.NewGuid().ToString();
                            lastId= id;
                            chapter = new Syllabus {
                                id = id,
                                volumeId = volumeId,
                                code = $"Syllabus-{code}",
                                pk = "Syllabus",
                                ttl = -1,
                                scope= scope,
                                children= new List<Tnode> { new Tnode {id = id ,pid=volumeId,  creatorId = creatorId,
                                    creatorName = creatorName,title=pt,updateTime= now} }
                            };
                            chapters.Add(chapter);
                            syllabuses.Add(chapter);
                            nodesVal.Add((point, id));
                        }
                        //下钻一层
                        level += 1;
                    }
                    else {
                        if (!string.IsNullOrWhiteSpace(lastId))
                        {
                            var child =  chapter.children.Find(child => child.pid.Equals(lastId)  && pt.Equals(ignoreCharacter ? Regex.Replace(child.title, express, "") : child.title));
                            if (child == null)
                            {
                                string id = id = Guid.NewGuid().ToString();
                                child = new Tnode {
                                    id = id,
                                    pid = lastId,
                                    creatorId = creatorId,
                                    creatorName = creatorName,
                                    title = pt,
                                    updateTime = now
                                };
                                chapter.children.Add(child);
                                lastId = child.id;
                                nodesVal.Add((point, child.id));
                            }
                            else {
                                lastId= child.id;
                                nodesVal.Add((point, child.id));
                            }
                            level += 1;
                        }
                    }
                }
                if (chapter != null) { 
                    resNodes.Add(nodesVal.Select(z => new IdCode { id = z.id, code = z.title }).ToList());
                }
            }
            bool volumeChange=false;
            List<SyllabusTreeNode> treeNodes = new List<SyllabusTreeNode>();
            foreach (var chapter in chapters)
            {
                if (!volume.syllabusIds.Contains(chapter.id)) {
                    volume.syllabusIds.Add(chapter.id);
                    volumeChange = true;
                }
                if (!string.IsNullOrWhiteSpace(grant_type) && grant_type.Equals("upsert")) {
                    await azureCosmos.GetCosmosClient().GetContainer(Constant.TEAMModelOS, tbname).UpsertItemAsync(chapter);
                }
                List<SyllabusTree> trees = SyllabusService.ListToTree(chapter.children);
                SyllabusTreeNode tree = new SyllabusTreeNode() { id = chapter.id, scope = chapter.scope, trees = trees, volumeId = chapter.volumeId, auth = chapter.auth, codeval = code };
                treeNodes.Add(tree);

            }
            if (volumeChange && !string.IsNullOrWhiteSpace(grant_type) && grant_type.Equals("upsert"))
            {
                await azureCosmos.GetCosmosClient().GetContainer(Constant.TEAMModelOS, tbname).ReplaceItemAsync(volume, volume.id, new PartitionKey(volume.code));
            }
            List<SyllabusTreeNode> redt = new List<SyllabusTreeNode>();
            //对课纲树形结构排序
            if (volume.syllabusIds.IsNotEmpty())
            {

                volume.syllabusIds.ForEach(x =>
                {
                    for (int index = 0; index < treeNodes.Count; index++)
                    {
                        if (treeNodes[index].id == x)
                        {
                            redt.Add(treeNodes[index]);
                            treeNodes.RemoveAt(index);
                        }
                    }
                });
                redt.AddRange(treeNodes);
                return (resNodes, redt);
            }
            else {
                return (resNodes, treeNodes);
            }
        }


        /// <summary>
        /// 根据id查询列表串联id pid的新的关系列表
        /// </summary>
        /// <param name="nodes"></param>
        /// <param name="pid"></param>
        /// <param name="newNodes"></param>
        /// <returns></returns>
        public static HashSet<Tnode> GetNewNode(List<Tnode> nodes, string pid, HashSet<Tnode> newNodes) {
            bool flag = false;
            string spid = "";
            foreach (var node in nodes) {
                if (node.pid == pid) {
                    newNodes.Add(node);
                    spid = node.id;
                    GetNewNode(nodes, spid, newNodes);
                    flag = true;
                }
            }
            return newNodes;
            //if (flag)
            //{
            //    return GetNewNode(nodes, spid, newNodes);
            //}
            //else {
            //    return newNodes;
            //}
        }


        public static List<Tnode> TreeToList(List<SyllabusTree> trees, List<Tnode> nodes,long now)
        {
            int index = 0;
            foreach (SyllabusTree tr in trees)
            {
                tr.order = index;
                index++;
            }
            trees = trees.OrderBy(x => x.order).ToList();
            List<Tnode> list = new List<Tnode>();
            //var list = trees.ToJsonString().ToObject<List<Tnode>>();
            trees.ForEach(x=> {
                List<string> cids = new List<string>();
                if (x.children.IsNotEmpty()) {
                    x.children.ForEach(y => cids.Add(y.id));
                }
                var node = new Tnode
                {
                    title = x.title,
                    id = x.id,
                    pid = x.pid,
                    order = x.order,
                    rnodes = x.rnodes,
                    cids= cids,
                    creatorId=x.creatorId,
                    creatorName=x.creatorName,
                    updateTime= now
                };
                list.Add(node);
            });
            nodes.AddRange(list);

            foreach (SyllabusTree tree in trees)
            {
                if (null != tree.children && tree.children.Count > 0)
                {
                    TreeToList(tree.children, nodes,now);
                }
            }
            return nodes;
        }
        public static List<SyllabusTree> ListToTree(List<Tnode> noes)
        {
            List<SyllabusTree> list = noes.ToJsonString().ToObject<List<SyllabusTree>>();
            //var lookup = list.ToDictionary(n => n.RowKey, n => n);

            var res = from r in list group r by r.id into g select g;
            Dictionary<string, SyllabusTree> blockDict = new Dictionary<string, SyllabusTree>();
            foreach (var s in res)
            {
                blockDict.TryAdd(s.First().id, s.First());
            }
            return GetChild(list, blockDict);
        }


        private static List<SyllabusTree> GetChild(List<SyllabusTree> list, Dictionary<string, SyllabusTree> dict)
        {
            //  list = list.OrderBy(m => m.Order).ToList();
            List<SyllabusTree> trees = new List<SyllabusTree>();
            trees = trees.OrderBy(x => x.order).ToList();
            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;
        }


        #region 开放平台使用



        public static List<OSyllabusTree> OListToTree(List<OTnode> noes)
        {
            List<OSyllabusTree> list = noes.ToJsonString().ToObject<List<OSyllabusTree>>();
            //var lookup = list.ToDictionary(n => n.RowKey, n => n);

            var res = from r in list group r by r.id into g select g;
            Dictionary<string, OSyllabusTree> blockDict = new Dictionary<string, OSyllabusTree>();
            foreach (var s in res)
            {
                blockDict.TryAdd(s.First().id, s.First());
            }
            return GetChildO(list, blockDict);
        }

        private static List<OSyllabusTree> GetChildO(List<OSyllabusTree> list, Dictionary<string, OSyllabusTree> dict)
        {
            //  list = list.OrderBy(m => m.Order).ToList();
            List<OSyllabusTree> trees = new List<OSyllabusTree>();
            trees = trees.OrderBy(x => x.order).ToList();
            foreach (OSyllabusTree node in list)
            {
                bool flag = dict.TryGetValue(node.pid, out OSyllabusTree syllabus);
                if (flag && syllabus != null)
                {
                    syllabus.children.Add(node);
                }
                else
                {
                    trees.Add(node);
                }
            }
            return trees;
        }
        #endregion
    }
}