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

namespace TEAMModelFunction
{
    public class MonitorCosmosDB
    {
        private readonly IHttpClientFactory _clientFactory;
        private readonly AzureCosmosFactory _azureCosmos;
        private readonly AzureServiceBusFactory _serviceBus;
        private readonly AzureStorageFactory _azureStorage;

        public MonitorCosmosDB(IHttpClientFactory clientFactory, AzureCosmosFactory azureCosmos,AzureServiceBusFactory azureServiceBus, AzureStorageFactory azureStorage)
        {
            _clientFactory = clientFactory;
            _azureCosmos = azureCosmos;
            _serviceBus = azureServiceBus;
            _azureStorage = azureStorage;
        }

        [FunctionName("Common")]
        public async Task Common([CosmosDBTrigger(
            databaseName: "TEAMModelOS",
            collectionName: "Common",
            ConnectionStringSetting = "Azure:Cosmos:ConnectionString",
            LeaseCollectionName = "leases")]IReadOnlyList<Document> inputs, ILogger log)
        {
            if (inputs != null && inputs.Count > 0)
            {
                log.LogInformation("Documents modified " + inputs.Count);
                log.LogInformation("First document Id " + inputs[0].Id);
                var client = _azureCosmos.GetCosmosClient();

                foreach (var input in inputs)
                {
                    string pk = input.GetPropertyValue<string>("pk");
                    if (!string.IsNullOrWhiteSpace(pk))
                    {                        
                        long stime = input.GetPropertyValue<long>("startTime");
                        long etime = input.GetPropertyValue<long>("endTime");
                        string school = input.GetPropertyValue<string>("school");
                        string code = input.GetPropertyValue<string>("code");
                        switch (pk)
                        {
                            case "Exam":
                                ExamInfo info = await client.GetContainer("TEAMModelOS", "Common").ReadItemAsync<ExamInfo>(input.Id, new Azure.Cosmos.PartitionKey($"{code}"));
                                List<ExamClassResult> examClassResults = new List<ExamClassResult>();
                                await foreach (var item in client.GetContainer("TEAMModelOS", "Common").GetItemQueryStreamIterator(queryText: $"select value(c) from c where c.examId = '{info.id}'", requestOptions: new QueryRequestOptions() { PartitionKey = new Azure.Cosmos.PartitionKey($"ExamClassResult-{school}") }))
                                {
                                    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>());
                                        }
                                    }
                                }

                                List<ChangeRecord> records = await _azureStorage.FindListByDict<ChangeRecord>(new Dictionary<string, object>() { { "RowKey", input.Id }, { "PartitionKey", info.progress } });
                                //ChangeRecord record = await client.GetContainer("TEAMModelOS", "Common").ReadItemAsync<ChangeRecord>(input.Id, new Azure.Cosmos.PartitionKey($"{info.progress}"));
                                switch (info.progress)
                                {
                                    case "pending":
                                        var message = new ServiceBusMessage(new { id = input.Id, progress = "going", code = code }.ToJsonString());
                                        message.ApplicationProperties.Add("name", "Exam");
                                        if (records.Count > 0)
                                        {
                                            await _serviceBus.GetServiceBusClient().cancelMessage("active-task", records[0].sequenceNumber);
                                            long start = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", message, DateTimeOffset.FromUnixTimeMilliseconds(stime));
                                            records[0].sequenceNumber = start;
                                            await _azureStorage.SaveOrUpdate<ChangeRecord>(records[0]);
                                            //await client.GetContainer("TEAMModelOS", "Common").ReplaceItemAsync(record, record.id, new Azure.Cosmos.PartitionKey($"{record.code}"));
                                        }
                                        else
                                        {
                                            long start = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", message, DateTimeOffset.FromUnixTimeMilliseconds(stime));
                                            ChangeRecord changeRecord = new ChangeRecord
                                            {
                                                RowKey = input.Id,
                                                PartitionKey = "pending",
                                                sequenceNumber = start,
                                                msgId = message.MessageId
                                            };
                                            await _azureStorage.Save<ChangeRecord>(changeRecord);
                                            //await client.GetContainer("TEAMModelOS", "Common").CreateItemAsync(changeRecord, new Azure.Cosmos.PartitionKey($"{changeRecord.code}"));
                                        }
                                        break;
                                    case "going":
                                        if (examClassResults.Count == 0)
                                        {
                                            for (int j = 0; j < info.subjects.Count; j++)
                                            {
                                                for (int k = 0; k < info.targetClassIds.Count; k++)
                                                {
                                                    ExamClassResult result = new ExamClassResult();
                                                    result.code = "ExamClassResult-" + info.school;
                                                    result.examId = info.id;
                                                    result.id = Guid.NewGuid().ToString();
                                                    result.subjectId = info.subjects[j].id;
                                                    result.year = info.year;                                                    
                                                    result.scope = info.scope;
                                                    result.pk = typeof(ExamClassResult).Name;
                                                    result.info.id = info.targetClassIds[k];
                                                    var sresponse = await client.GetContainer("TEAMModelOS", "School").ReadItemStreamAsync(info.targetClassIds[k], new Azure.Cosmos.PartitionKey($"Class-{info.school}"));
                                                    if (sresponse.Status == 200)
                                                    {
                                                        using var json = await JsonDocument.ParseAsync(sresponse.ContentStream);
                                                        Class classroom = json.ToObject<Class>();
                                                        result.info.name = classroom.name;
                                                        List<List<string>> ans = new List<List<string>>();
                                                        List<double> ansPoint = new List<double>();
                                                        foreach (double p in info.papers[j].point)
                                                        {
                                                            ans.Add(new List<string>());
                                                            ansPoint.Add(-1);
                                                        }
                                                        foreach (StudentSimple stu in classroom.students)
                                                        {
                                                            result.studentIds.Add(stu.id);
                                                            result.studentAnswers.Add(ans);
                                                            result.studentScores.Add(ansPoint);
                                                        }
                                                    }
                                                    //result.progress = info.progress;
                                                    result.school = info.school;
                                                    await client.GetContainer("TEAMModelOS", "Common").CreateItemAsync(result, new Azure.Cosmos.PartitionKey($"{result.code}"));

                                                }
                                            }
                                            var messageEnd = new ServiceBusMessage(new { id = input.Id, progress = "finish", code = code }.ToJsonString());
                                            messageEnd.ApplicationProperties.Add("name", "Exam");
                                            if (records.Count > 0)
                                            {
                                                long end = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageEnd, DateTimeOffset.FromUnixTimeMilliseconds(etime));
                                                await _serviceBus.GetServiceBusClient().cancelMessage("active-task", records[0].sequenceNumber);
                                                records[0].sequenceNumber = end;
                                                await _azureStorage.SaveOrUpdate<ChangeRecord>(records[0]);
                                                //await client.GetContainer("TEAMModelOS", "Common").ReplaceItemAsync(record, record.id, new Azure.Cosmos.PartitionKey($"{record.code}"));
                                            }
                                            else
                                            {
                                                long end = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageEnd, DateTimeOffset.FromUnixTimeMilliseconds(etime));
                                                ChangeRecord changeRecord = new ChangeRecord
                                                {
                                                    RowKey = input.Id,
                                                    PartitionKey = "going",
                                                    sequenceNumber = end,
                                                    msgId = messageEnd.MessageId
                                                };
                                                await _azureStorage.Save<ChangeRecord>(changeRecord);
                                                //await client.GetContainer("TEAMModelOS", "Common").CreateItemAsync(changeRecord, new Azure.Cosmos.PartitionKey($"{changeRecord.code}"));
                                            }
                                        }
                                        break;
                                    case "finish":
                                        for (int j = 0; j < info.subjects.Count; j++)
                                        {
                                            if (info.subjects[j].classCount == info.targetClassIds.Count)
                                            {
                                                ExamResult result = new ExamResult();
                                                //人数总和
                                                int Count = 0;
                                                int m = 0;
                                                List<ClassRange> classRanges = new List<ClassRange>();
                                                foreach (ExamClassResult classResult in examClassResults)
                                                {
                                                    if (classResult.subjectId.Equals(info.subjects[j].id))
                                                    {
                                                        foreach (List<double> scores in classResult.studentScores)
                                                        {
                                                            result.studentScores.Add(scores);
                                                        }
                                                        //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);
                                                        }
                                                    }
                                                }
                                                result.classes = classRanges;                                                
                                                result.pk = typeof(ExamResult).Name;
                                                result.code = "ExamResult-" + info.id;
                                                result.school = info.school;
                                                result.id = info.subjects[j].id;
                                                result.examId = info.id;
                                                result.subjectId = info.subjects[j].id;
                                                result.year = info.year;
                                                result.paper = info.papers[j];
                                                //result.point = info.papers[j].point;
                                                result.scope = info.scope;
                                                result.name = info.name;
                                                result.time = info.startTime;                                 
                                                await _azureCosmos.GetCosmosClient().GetContainer("TEAMModelOS", "Common").UpsertItemAsync(result, new Azure.Cosmos.PartitionKey($"ExamResult-{info.id}"));
                                            }
                                        }
                                        break;
                                }
                                break;
                            case "Vote":
                                Vote vote = await client.GetContainer("TEAMModelOS", "Common").ReadItemAsync<Vote>(input.Id, new Azure.Cosmos.PartitionKey($"{code}"));
                                List<ChangeRecord> voteRecords = await _azureStorage.FindListByDict<ChangeRecord>(new Dictionary<string, object>() { { "RowKey", input.Id }, { "PartitionKey", vote.progress } });
                                //ChangeRecord voteRecord = await client.GetContainer("TEAMModelOS", "Common").ReadItemAsync<ChangeRecord>(input.Id, new Azure.Cosmos.PartitionKey($"{vote.progress}"));
                                switch (vote.progress)
                                {
                                    case "pending":
                                        var messageVote = new ServiceBusMessage(new { id = input.Id, progress = "going", code = code }.ToJsonString());
                                        messageVote.ApplicationProperties.Add("name", "Vote");
                                        if (voteRecords.Count > 0)
                                        {
                                            long start = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageVote, DateTimeOffset.FromUnixTimeMilliseconds(stime));
                                            await _serviceBus.GetServiceBusClient().cancelMessage("active-task", voteRecords[0].sequenceNumber);
                                            voteRecords[0].sequenceNumber = start;
                                            await _azureStorage.SaveOrUpdate<ChangeRecord>(voteRecords[0]);
                                            //await client.GetContainer("TEAMModelOS", "Common").ReplaceItemAsync(voteRecord, voteRecord.id, new Azure.Cosmos.PartitionKey($"{voteRecord.code}"));
                                        }
                                        else
                                        {
                                            long start = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageVote, DateTimeOffset.FromUnixTimeMilliseconds(stime));
                                            ChangeRecord changeRecord = new ChangeRecord
                                            {
                                                RowKey = input.Id,
                                                PartitionKey = "pending",
                                                sequenceNumber = start,
                                                msgId = messageVote.MessageId
                                            };
                                            await _azureStorage.Save<ChangeRecord>(changeRecord);
                                            //await client.GetContainer("TEAMModelOS", "Common").CreateItemAsync(changeRecord, new Azure.Cosmos.PartitionKey($"{changeRecord.code}"));
                                        }
                                        break;
                                    case "going":
                                        var messageVoteEnd = new ServiceBusMessage(new { id = input.Id, progress = "finish", code = code }.ToJsonString());
                                        messageVoteEnd.ApplicationProperties.Add("name", "Vote");
                                        if (voteRecords.Count > 0)
                                        {
                                            long end = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageVoteEnd, DateTimeOffset.FromUnixTimeMilliseconds(etime));
                                            await _serviceBus.GetServiceBusClient().cancelMessage("active-task", voteRecords[0].sequenceNumber);
                                            voteRecords[0].sequenceNumber = end;
                                            await _azureStorage.SaveOrUpdate<ChangeRecord>(voteRecords[0]);
                                            //await client.GetContainer("TEAMModelOS", "Common").ReplaceItemAsync(voteRecord, voteRecord.id, new Azure.Cosmos.PartitionKey($"{voteRecord.code}"));
                                        }
                                        else
                                        {
                                            long end = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageVoteEnd, DateTimeOffset.FromUnixTimeMilliseconds(etime));
                                            ChangeRecord changeRecord = new ChangeRecord
                                            {
                                                RowKey = input.Id,
                                                PartitionKey = "going",
                                                sequenceNumber = end,
                                                msgId = messageVoteEnd.MessageId
                                            };
                                            await _azureStorage.Save<ChangeRecord>(changeRecord);
                                            //await client.GetContainer("TEAMModelOS", "Common").CreateItemAsync(changeRecord, new Azure.Cosmos.PartitionKey($"{changeRecord.code}"));
                                        }
                                        break;
                                }
                                break;
                            case "Survey":
                                Survey survey = await client.GetContainer("TEAMModelOS", "Common").ReadItemAsync<Survey>(input.Id, new Azure.Cosmos.PartitionKey($"{code}"));
                                //messageSurvey.ScheduledEnqueueTime = DateTimeOffset.FromUnixTimeMilliseconds(stime);
                                //string msgid = messageSurvey.MessageId;
                                List<ChangeRecord> changeRecords = await _azureStorage.FindListByDict<ChangeRecord>(new Dictionary<string, object>() { { "RowKey", input.Id }, { "PartitionKey", survey.progress } });
                                //ChangeRecord surveyRecord = await client.GetContainer("TEAMModelOS", "Common").ReadItemAsync<ChangeRecord>(input.Id, new Azure.Cosmos.PartitionKey($"{survey.progress}"));
                                switch (survey.progress)
                                {
                                    case "pending":
                                        var messageSurvey = new ServiceBusMessage(new { id = input.Id, progress = "going", code = code }.ToJsonString());
                                        messageSurvey.ApplicationProperties.Add("name", "Survey");
                                        if (changeRecords.Count > 0)
                                        {
                                            await _serviceBus.GetServiceBusClient().cancelMessage("active-task", changeRecords[0].sequenceNumber);
                                            long start = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageSurvey, DateTimeOffset.FromUnixTimeMilliseconds(stime));
                                            changeRecords[0].sequenceNumber = start;
                                            await _azureStorage.SaveOrUpdate<ChangeRecord>(changeRecords[0]);
                                            //await client.GetContainer("TEAMModelOS", "Common").ReplaceItemAsync(surveyRecord, surveyRecord.id, new Azure.Cosmos.PartitionKey($"{surveyRecord.code}"));
                                        }
                                        else
                                        {
                                            long start = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageSurvey, DateTimeOffset.FromUnixTimeMilliseconds(stime));
                                            ChangeRecord changeRecord = new ChangeRecord
                                            {
                                                RowKey = input.Id,
                                                PartitionKey = "pending",
                                                sequenceNumber = start,
                                                msgId = messageSurvey.MessageId
                                            };
                                            await _azureStorage.Save<ChangeRecord>(changeRecord);
                                            //await client.GetContainer("TEAMModelOS", "Common").CreateItemAsync(changeRecord, new Azure.Cosmos.PartitionKey($"{changeRecord.code}"));
                                        }
                                        break;
                                    case "going":
                                        var messageSurveyEnd = new ServiceBusMessage(new { id = input.Id, progress = "finish", code = code }.ToJsonString());
                                        messageSurveyEnd.ApplicationProperties.Add("name", "Survey");
                                        if (changeRecords.Count > 0)
                                        {
                                            long end = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageSurveyEnd, DateTimeOffset.FromUnixTimeMilliseconds(etime));
                                            await _serviceBus.GetServiceBusClient().cancelMessage("active-task", changeRecords[0].sequenceNumber);
                                            changeRecords[0].sequenceNumber = end;
                                            await _azureStorage.SaveOrUpdate<ChangeRecord>(changeRecords[0]);
                                        }
                                        else
                                        {
                                            long end = await _serviceBus.GetServiceBusClient().SendScheduleMessageAsync("active-task", messageSurveyEnd, DateTimeOffset.FromUnixTimeMilliseconds(etime));
                                            ChangeRecord changeRecord = new ChangeRecord
                                            {
                                                RowKey = input.Id,
                                                PartitionKey = "going",
                                                sequenceNumber = end,
                                                msgId = messageSurveyEnd.MessageId
                                            };
                                            await _azureStorage.Save<ChangeRecord>(changeRecord);
                                            //await client.GetContainer("TEAMModelOS", "Common").CreateItemAsync(changeRecord, new Azure.Cosmos.PartitionKey($"{changeRecord.code}"));
                                        }
                                        break;
                                }
                                break;

                        }
                    }
                }
            }
        }
    }
}