using Azure.Messaging.ServiceBus;
using Azure.Storage.Blobs.Models;
using Azure;
using Microsoft.Azure.Cosmos;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using TEAMModelOS.SDK.DI;
using TEAMModelOS.SDK.Extension;
using TEAMModelOS.SDK.Models.Service.BI;
using TEAMModelOS.SDK.Services;
using static TEAMModelOS.SDK.Models.JointEventGroupBase;
using Azure.Core;
using Microsoft.Extensions.Configuration;

namespace TEAMModelOS.SDK.Models.Service
{
    public static class JointService
    {
        //取得JointExam生成Exam
        public static async Task GenerateExamFromJointExamAsync(CosmosClient client, AzureStorageFactory _azureStorage, AzureServiceBusFactory _serviceBus, CoreAPIHttpService _coreAPIHttpService, AzureRedisFactory _azureRedis, IConfiguration _configuration, DingDing _dingDing, JointExam jointExam)
        {
            try
            {
                long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
                //取得JointExam
                List<JointEventClassBase> classes = new List<JointEventClassBase>();
                List<JointEventGroupBase> stuLists = new List<JointEventGroupBase>();
                //取得JointCourse ※examType == "custom" 之後再處理
                List<JointEventGroupDb> jointCourses = new List<JointEventGroupDb>();
                if (!jointExam.examType.Equals("custom"))
                {
                    string jointCourseSql = $"SELECT * FROM c WHERE c.jointEventId = '{jointExam.jointEventId}' AND c.jointGroupId = '{jointExam.jointGroupId}'";
                    await foreach (var item in client.GetContainer("TEAMModelOS", "Teacher").GetItemQueryIteratorSql<JointEventGroupDb>(queryText: jointCourseSql, requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey($"JointCourse") }))
                    {
                        jointCourses.Add(item);
                    }
                }
                //評量資料生成 ExamInfo actExamInfo ※一個課程一個Exam
                List<ExamInfo> examList = new List<ExamInfo>();
                foreach (JointEventGroupDb jointCourse in jointCourses)
                {
                    string actExamCreatorId = jointCourse.creatorId;
                    //個人課程
                    if(jointCourse.scope.Equals("private"))
                    {
                        foreach (JointEventGroupCourse jointExamGroupCourse in jointCourse.courseLists)
                        {
                            string actExamCourseId = jointExamGroupCourse.courseId;
                            string actExamCourseName = jointExamGroupCourse.courseName;
                            //評量資料生成
                            ExamInfo actExamInfo = new ExamInfo();
                            ///取得已生成的Exam ※
                            string examSql = $"SELECT DISTINCT c.id, c.source, c.name, c.jointExamId, c.subjects, c.stuLists, c.targets, c.papers, c.year, c.startTime, c.endTime FROM c JOIN s IN c.subjects WHERE c.jointExamId = '{jointExam.id}' AND s.id = '{actExamCourseId}'";
                            await foreach (var item in client.GetContainer("TEAMModelOS", "Teacher").GetItemQueryIteratorSql<ExamInfo>(queryText: examSql, requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey($"Exam-{actExamCreatorId}") }))
                            {
                                actExamInfo = item;
                            }
                            ///尚無評量資料
                            if (string.IsNullOrWhiteSpace(actExamInfo.id))
                            {
                                actExamInfo.code = $"Exam-{actExamCreatorId}";
                                actExamInfo.owner = "teacher";
                                actExamInfo.scope = jointCourse.scope;
                                actExamInfo.creatorId = actExamCreatorId;
                                actExamInfo.id = Guid.NewGuid().ToString();
                            }
                            actExamInfo.source = jointExam.source;
                            actExamInfo.name = jointExam.name;
                            actExamInfo.jointExamId = jointExam.id;
                            actExamInfo.subjects = new List<ExamSubject>() { new ExamSubject() { id = actExamCourseId, name = actExamCourseName, classCount = jointExamGroupCourse.groupLists.Count } };
                            ///評量stuLists
                            foreach (JointEventGroupCourseGroup actGroup in jointExamGroupCourse.groupLists)
                            {
                                if(!actExamInfo.stuLists.Contains(actGroup.id))
                                {
                                    actExamInfo.stuLists.Add(actGroup.id);
                                }
                                List<string> targetRow = new List<string>() { actExamCourseId, actGroup.id };
                                var targetRowJson = JsonSerializer.SerializeToElement(targetRow);
                                if(!actExamInfo.targets.Contains(targetRowJson))
                                {
                                    actExamInfo.targets.Add(targetRowJson);
                                }
                            }
                            ///試卷
                            actExamInfo.papers = Newtonsoft.Json.JsonConvert.DeserializeObject<List<PaperSimple>>(Newtonsoft.Json.JsonConvert.SerializeObject(jointExam.papers));
                            ///時間
                            actExamInfo.year = DateTimeOffset.UtcNow.Year;
                            actExamInfo.startTime = jointExam.startTime;
                            actExamInfo.endTime = jointExam.endTime;

                            examList.Add(actExamInfo);
                        }
                    }
                    //[待做] 學校班級
                }

                //生成評量
                if (examList.Count > 0)
                {
                    foreach (ExamInfo exam in examList)
                    {
                        await GenerateExam(client, _azureStorage, _serviceBus, _coreAPIHttpService, _azureRedis, _configuration, _dingDing, jointExam, exam);
                    }
                }
            }
            catch (Exception)
            {
                
            }
        }

        //生成評量(單)
        private static async Task<string> GenerateExam(CosmosClient client, AzureStorageFactory _azureStorage, AzureServiceBusFactory _serviceBus, CoreAPIHttpService _coreAPIHttpService, AzureRedisFactory _azureRedis, IConfiguration _configuration, DingDing _dingDing, JointExam jointExam, ExamInfo exam)
        {
            long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
            string Result = string.Empty;
            exam.createTime = now;
            if (exam.startTime <= 0) exam.startTime = now;
            List<(string pId, List<string> gid)> ps = new();
            var group = exam.groupLists;
            if (group.Count > 0)
            {
                foreach (var keys in group)
                {
                    foreach (KeyValuePair<string, List<string>> pp in keys)
                    {
                        ps.Add((pp.Key, pp.Value));
                    }
                }
            }
            List<string> classes = ExamService.getClasses(exam.classes, exam.stuLists);
            (List<RMember> tchList, List<RGroupList> classLists) = await GroupListService.GetMemberByListids(_coreAPIHttpService, client, _dingDing, classes, exam.school, ps);
            exam.stuCount = tchList.Count;
            string mode = string.Empty;
            ResponseMessage response = null;
            if (string.IsNullOrEmpty(exam.id))
            {
                mode = "add";
            }
            else
            {
                response = await client.GetContainer("TEAMModelOS", "Common").ReadItemStreamAsync(exam.id, new PartitionKey($"{exam.code}"));
                if (response.StatusCode == System.Net.HttpStatusCode.OK) mode = "upd";
                else mode = "add";
            }
            //DB操作
            if (mode.Equals("add")) //新建
            {
                if (string.IsNullOrWhiteSpace(exam.id)) exam.id = Guid.NewGuid().ToString();
                exam.progress = (exam.startTime > now) ? "pending" : "going";
                var messageBlob = new ServiceBusMessage();
                if (exam.scope.Equals("school") && !string.IsNullOrWhiteSpace(exam.school))
                {
                    exam.size = await _azureStorage.GetBlobContainerClient(exam.school).GetBlobsSize($"exam/{exam.id}");
                    await BlobService.RefreshBlobRoot(new BlobRefreshMessage { progress = "insert", root = $"exam", name = exam.school }, _serviceBus, _configuration, _azureRedis);
                }
                else
                {
                    exam.size = await _azureStorage.GetBlobContainerClient(exam.creatorId).GetBlobsSize($"exam/{exam.id}");
                    await BlobService.RefreshBlobRoot(new BlobRefreshMessage { progress = "insert", root = $"exam", name = exam.creatorId }, _serviceBus, _configuration, _azureRedis);
                }
                int n = 0;
                List<string> sheetIds = new List<string>();
                foreach (PaperSimple simple in exam.papers)
                {
                    simple.blob = $"/exam/{exam.id}/paper/{exam.subjects[n].id}";
                    n++;
                    simple.sheet = null;
                }
                exam = await client.GetContainer(Constant.TEAMModelOS, "Common").CreateItemAsync(exam, new PartitionKey($"{exam.code}"));
                await BIStats.SetTypeAddStats(client, _dingDing, exam.school, "Exam", 1);//BI统计增/减量
            }
            else if (response != null) //更新
            {
                using var json = await JsonDocument.ParseAsync(response.Content);
                ExamInfo info = json.ToObject<ExamInfo>();
                if (info.progress.Equals("going"))
                {
                    Result = "活动正在进行中，无法修改";
                }
                var messageBlob = new ServiceBusMessage();
                if (exam.scope.Equals("school") && !string.IsNullOrWhiteSpace(exam.school))
                {
                    exam.size = await _azureStorage.GetBlobContainerClient(exam.school).GetBlobsSize($"exam/{exam.id}");
                    await BlobService.RefreshBlobRoot(new BlobRefreshMessage { progress = "update", root = $"exam", name = exam.school }, _serviceBus, _configuration, _azureRedis);
                }
                else
                {
                    exam.size = await _azureStorage.GetBlobContainerClient(exam.creatorId).GetBlobsSize($"exam/{exam.id}");
                    await BlobService.RefreshBlobRoot(new BlobRefreshMessage { progress = "update", root = $"exam", name = exam.creatorId }, _serviceBus, _configuration, _azureRedis);
                }
                exam.progress = info.progress;
                int n = 0;
                List<string> sheetIds = new List<string>();
                foreach (PaperSimple simple in exam.papers)
                {
                    if (!string.IsNullOrEmpty(simple.subjectId))
                    {
                        simple.blob = $"/exam/{exam.id}/paper/{simple.subjectId}/{simple.id}";
                    }
                    else
                    {
                        simple.blob = $"/exam/{exam.id}/paper/{exam.subjects[n].id}";
                        n++;
                    }
                    simple.sheet = null;
                }
                exam = await client.GetContainer(Constant.TEAMModelOS, "Common").ReplaceItemAsync(exam, exam.id, new PartitionKey($"{exam.code}"));
            }
            //Blob操作 ※取得試卷源(blob)、複製到評測紀錄下
            ///試卷源字典
            List<Dictionary<string, string>> sourcePaperInfo = new List<Dictionary<string, string>>();
            foreach (PaperSimple paperInfo in jointExam.papers)
            {
                string paperBlobPath = (!paperInfo.blob.EndsWith("/")) ? paperInfo.blob + "/" : paperInfo.blob;
                paperBlobPath = (paperInfo.blob.StartsWith("/")) ? paperBlobPath.Remove(0, 1) : paperBlobPath;
                sourcePaperInfo.Add(new Dictionary<string, string>() { { "id", paperInfo.id }, { "blob", paperBlobPath }, { "itemcount", paperInfo.point.Count.ToString() } });
            }
            bool paperDataCopyErrFlg = false; //試卷資料拷貝錯誤Flag  true:拷貝錯誤
            //Blob拷貝程序
            int paperIndex = 0;
            foreach (Dictionary<string, string> sourcePaperInfoDic in sourcePaperInfo)
            {
                //拷貝源：Container => jointExam.creatorId  Path:papers.blob
                //拷貝對象：Container => exam.creatorId, Path:exam/{exam.id}/paper/{exam.subjects[paperIndex].id}/
                string targetScope = exam.scope; //評測對象 school：校本班級  private：私人課程
                var sourceBlobContainer = _azureStorage.GetBlobContainerClient(jointExam.creatorId); //統測活動來源一定是個人
                var blobPrivateContainer = (targetScope.Equals("school")) ? _azureStorage.GetBlobContainerClient(exam.school) : _azureStorage.GetBlobContainerClient(exam.creatorId);
                string sourceBlobPath = sourcePaperInfoDic["blob"];
                string subjectId = exam.subjects[paperIndex].id;
                string destBlobPath = $"exam/{exam.id}/paper/{subjectId}/"; //拷貝對象路徑 path:exam/{評測ID}/paper/{subjectID}/
                Pageable<BlobItem> sourceBlobs = sourceBlobContainer.GetBlobs(prefix: sourceBlobPath);
                if (sourceBlobs.Count() > 0)
                {
                    foreach (var blob in sourceBlobs)
                    {
                        var sourceFileBlob = sourceBlobContainer.GetBlobClient(blob.Name);
                        if (sourceFileBlob.Exists())
                        {
                            var sourceFileUri = sourceBlobContainer.GetBlobClient(blob.Name).Uri;
                            string fileName = blob.Name.Replace(sourceBlobPath, "");
                            string destBlobFilePath = $"{destBlobPath}{fileName}";
                            await blobPrivateContainer.GetBlobClient(destBlobFilePath).StartCopyFromUriAsync(sourceFileUri);
                        }
                        else
                        {
                            paperDataCopyErrFlg = true;
                        }
                    }
                }
                paperIndex++;
            }

            return Result;
        }
    }
}