using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Text.Json;
using System.Threading.Tasks;
using Azure.Cosmos;
using Microsoft.Azure.Documents;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;
using TEAMModelOS.Models.CommonInfo;
using TEAMModelOS.SDK.DI;
using TEAMModelOS.SDK.Extension;

namespace TEAMModelFunction
{
    public class MonitorCosmosDB
    {
        private readonly AzureCosmosFactory _azureCosmos;
        private readonly DingDing _dingDing;

        public MonitorCosmosDB( IHttpClientFactory clientFactory,AzureCosmosFactory azureCosmos,DingDing dingDing)
        {
            _azureCosmos = azureCosmos;
            _dingDing = dingDing;
    }

        [FunctionName("School")]
        public async Task School([CosmosDBTrigger(
            databaseName: "TEAMModelOS",
            collectionName: "Common",
            ConnectionStringSetting = "CosmosConnection",
            LeaseCollectionName = "leases")]IReadOnlyList<Document> input, ILogger log)
        {
            try {
                var client = _azureCosmos.GetCosmosClient();
                List<ExamInfo> exams = new List<ExamInfo>();
                string pk = input[0].GetPropertyValue<string>("pk");
                if (!string.IsNullOrEmpty(pk) && pk.Equals("Exam", StringComparison.OrdinalIgnoreCase))
                {
                    string code = input[0].GetPropertyValue<string>("code");
                    await foreach (var item in client.GetContainer("TEAMModelOS", "Common").GetItemQueryStreamIterator(queryText: $"select value(c) from c where c.id = '{input[0].Id}'", requestOptions: new QueryRequestOptions() { PartitionKey = new Azure.Cosmos.PartitionKey($"{code}") }))
                    {
                        using var json = await JsonDocument.ParseAsync(item.ContentStream);
                        if (json.RootElement.TryGetProperty("_count", out JsonElement count) && count.GetUInt16() > 0)
                        {
                            foreach (var obj in json.RootElement.GetProperty("Documents").EnumerateArray())
                            {

                                exams.Add(obj.ToObject<ExamInfo>());
                            }
                        }
                    }
                    for (int i = 0; i < exams.Count; i++)
                    {
                        List<ExamClassResult> examClassResults = new List<ExamClassResult>();
                        await foreach (var item in client.GetContainer("TEAMModelOS", "Common").GetItemQueryStreamIterator(queryText: $"select value(c) from c where c.examId = '{exams[i].id}'", requestOptions: new QueryRequestOptions() { PartitionKey = new Azure.Cosmos.PartitionKey($"{code}") }))
                        {
                            using var json = await JsonDocument.ParseAsync(item.ContentStream);
                            if (json.RootElement.TryGetProperty("_count", out JsonElement count) && count.GetUInt16() > 0)
                            {
                                foreach (var obj in json.RootElement.GetProperty("Documents").EnumerateArray())
                                {
                                    examClassResults.Add(obj.ToObject<ExamClassResult>());
                                }
                            }
                        }
                        /*if (exams[i].startTime.CompareTo(DateTimeOffset.UtcNow.ToUnixTimeMilliseconds()) < 0 
                            && exams[i].endTime.CompareTo(DateTimeOffset.UtcNow.ToUnixTimeMilliseconds()) > 0 )
                        {*/
                        if (examClassResults.Count < 0)
                        {
                            if (exams[i].progress.Equals("going", StringComparison.OrdinalIgnoreCase))
                            {

                                //await client.GetContainer("TEAMModelOS", "Common").ReplaceItemAsync(exams[i], exams[i].id.ToString(), new Azure.Cosmos.PartitionKey($"{exams[i].code}"));
                                for (int j = 0; j < exams[i].subjects.Count; j++)
                                {
                                    for (int k = 0; k < exams[i].targetClassIds.Count; k++)
                                    {
                                        ExamClassResult result = new ExamClassResult();
                                        result.code = "ExamClassResult-" + exams[i].school;
                                        result.examId = exams[i].id;
                                        result.id = Guid.NewGuid().ToString();
                                        result.subjectId = exams[i].subjects[j].id;
                                        result.year = exams[i].year;
                                        result.ttl = -1;
                                        result.scope = exams[i].scope;
                                        result.pk = typeof(ExamClassResult).Name;
                                        result.info.id = exams[i].targetClassIds[k];
                                        var sresponse = await client.GetContainer("TEAMModelOS", "School").ReadItemStreamAsync(exams[i].targetClassIds[k], new Azure.Cosmos.PartitionKey($"Class-{exams[i].school}"));
                                        if (sresponse.Status == 200)
                                        {
                                            using var json = await JsonDocument.ParseAsync(sresponse.ContentStream);
                                            Classroom classroom = json.ToObject<Classroom>();
                                            result.info.name = classroom.name;
                                            List<List<string>> ans = new List<List<string>>();
                                            List<double> ansPoint = new List<double>();
                                            foreach (double p in exams[i].papers[j].point)
                                            {
                                                ans.Add(new List<string>());
                                                ansPoint.Add(0);
                                            }
                                            foreach (StudentSimple stu in classroom.students)
                                            {
                                                result.studentIds.Add(stu.id);
                                                result.studentAnswers.Add(ans);
                                                result.studentScores.Add(ansPoint);
                                            }
                                        }
                                        result.progress = exams[i].progress;
                                        result.school = exams[i].school;
                                        await client.GetContainer("TEAMModelOS", "Common").CreateItemAsync(result, new Azure.Cosmos.PartitionKey($"{result.code}"));

                                    }
                                }
                            }
                        }
                        if (exams[i].progress.Equals("finish", StringComparison.OrdinalIgnoreCase))
                        {
                            for (int j = 0; j < exams[i].subjects.Count; j++)
                            {
                                ExamResult result = new ExamResult();
                                result.ttl = -1;
                                result.pk = typeof(ExamResult).Name;
                                result.code = "ExamResult-" + exams[i].school;
                                result.school = exams[i].school;
                                result.id = Guid.NewGuid().ToString();
                                result.examId = exams[i].id;
                                result.subjectId = exams[i].subjects[j].id;
                                result.year = exams[i].year;
                                result.paper = exams[i].papers[j];
                                result.point = exams[i].papers[j].point;
                                result.scope = exams[i].scope;
                                result.name = exams[i].name;
                                //result.time

                                //人数总和
                                int Count = 0;
                                int m = 0;
                                List<ClassRange> classRanges = new List<ClassRange>();
                                foreach (ExamClassResult classResult in examClassResults)
                                {
                                    //处理班级信息
                                    ClassRange range = new ClassRange();
                                    range.id = classResult.info.id;
                                    range.name = classResult.info.name;
                                    List<int> ran = new List<int>();
                                    int stuCount = classResult.studentIds.Count;
                                    Count += stuCount;
                                    if (m == 0)
                                    {
                                        ran.Add(0);
                                        ran.Add(stuCount - 1);
                                    }
                                    else
                                    {
                                        ran.Add(Count - stuCount);
                                        ran.Add(Count - 1);
                                    }
                                    m++;
                                    range.range = ran;
                                    classRanges.Add(range);
                                    //处理学生ID
                                    foreach (string id in classResult.studentIds)
                                    {
                                        result.studentIds.Add(id);
                                    }
                                    foreach (List<double> scores in classResult.studentScores)
                                    {
                                        result.studentScores.Add(scores);
                                    }
                                }
                                result.classes = classRanges;
                                await _azureCosmos.GetCosmosClient().GetContainer("TEAMModelOS", "Common").CreateItemAsync(result, new Azure.Cosmos.PartitionKey($"ExamResult-{result.school}"));
                            }
                        }
                    }
                }
            } catch (Exception e) {
                await _dingDing.SendBotMsg($"CosmosDB_common，School()\n{e.Message}", GroupNames.醍摩豆服務運維群組);
                return;
            }
                     
        }
    }
}