using Azure.Messaging.ServiceBus;
using HTEXScreen.Service.AzureRedis;
using Microsoft.Azure.Amqp.Framing;
using Microsoft.Extensions.Caching.Memory;
using System;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Text.Json.Nodes;
using System.Threading;
using System.Web;
using TEAMModelOS.SDK.DI;

namespace HTEXScreen.Service
{
    public class ScreenPDFSubTest : BackgroundService, IDisposable
    {
        private readonly AzureStorageFactory _azureStorage;
        private readonly HttpClient _httpClient;
        private readonly AzureRedisFactory _azureRedisFactory;
        private readonly AzureCosmosFactory _azureCosmosFactory;
        //消息订阅
        private const string Channel = "screenpdf";
        private readonly    ServiceBusReceiver _receiver;
        public static SpinWait spinWait = new SpinWait(); // 构造SpinWait实例
        public ScreenPDFSubTest(AzureRedisFactory azureRedisFactory, AzureCosmosFactory azureCosmosFactory, HttpClient httpClient, AzureStorageFactory azureStorage,AzureServiceBusFactory azureService)
        { 
            _receiver = azureService.GetServiceBusClient("Test").CreateReceiver(Channel, new ServiceBusReceiverOptions { ReceiveMode= ServiceBusReceiveMode.PeekLock});
            _httpClient = httpClient;
            _azureStorage = azureStorage;
            _azureRedisFactory = azureRedisFactory;
            _azureCosmosFactory= azureCosmosFactory;
        }

        protected async  override Task ExecuteAsync(CancellationToken stoppingToken)
        {
            while (true) 
            {
                //string sj = @"{'studentId': '20220809004',    'studentName': '学生4',     'picture': null,     'userType': 2,     'school': 'habook',     'classIds': [         'ab41048e-b8ca-41fb-9224-30ba81b0e4e2'     ],     'artId': '78c15535-cbd0-4239-b908-776ec6a43340',     'totalScore': 0,     'subjectScores': [         {             'subjectId': 'subject_painting',             'score': 0         }     ],     'results': [         {             'taskId': 'd1162055-6a11-ac12-bd45-7d8962cf8f53',             'taskName': null,             'subjectId': 'subject_painting',             'subjectName': null,             'quotaId': 'quota_21',             'quotaName': '基础知识',             'quotaType': 1,             'score': -1,             'files': null         },         {             'taskId': 'b8eb424c-7b80-79cd-4f86-5431bb8c9a3b',             'taskName': null,             'subjectId': 'subject_painting',             'subjectName': null,             'quotaId': 'quota_22',             'quotaName': '基本技能',             'quotaType': 2,             'score': -1,             'files': null         }     ],     'id': 'habook-20220809004',     'code': 'ArtResult-78c15535-cbd0-4239-b908-776ec6a43340',     'pk': 'ArtResult',     'ttl': -1,     '_rid': 'omxMALJh0IhTowgAAAAAAA==',     '_self': 'dbs/omxMAA==/colls/omxMALJh0Ig=/docs/omxMALJh0IhTowgAAAAAAA==/',     '_etag': '\\'0200f067-0000-4200-0000-6355f1cd0000\\'',     '_attachments': 'attachments/',     '_ts': 1666576845 }";
                //string json = "{\"studentId\": \"20220809004\",    \"studentName\": \"学生4\",     \"picture\": null,     \"userType\": 2,     \"school\": \"habook\",     \"classIds\": [         \"ab41048e-b8ca-41fb-9224-30ba81b0e4e2\"     ],     \"artId\": \"78c15535-cbd0-4239-b908-776ec6a43340\",     \"totalScore\": 0,     \"subjectScores\": [         {             \"subjectId\": \"subject_painting\",             \"score\": 0         }     ],     \"results\": [         {             \"taskId\": \"d1162055-6a11-ac12-bd45-7d8962cf8f53\",             \"taskName\": null,             \"subjectId\": \"subject_painting\",             \"subjectName\": null,             \"quotaId\": \"quota_21\",             \"quotaName\": \"基础知识\",             \"quotaType\": 1,             \"score\": -1,             \"files\": null         },         {             \"taskId\": \"b8eb424c-7b80-79cd-4f86-5431bb8c9a3b\",             \"taskName\": null,             \"subjectId\": \"subject_painting\",             \"subjectName\": null,             \"quotaId\": \"quota_22\",             \"quotaName\": \"基本技能\",             \"quotaType\": 2,             \"score\": -1,             \"files\": null         }     ],     \"id\": \"habook-20220809004\",     \"code\": \"ArtResult-78c15535-cbd0-4239-b908-776ec6a43340\",     \"pk\": \"ArtResult\",     \"ttl\": -1,     \"_rid\": \"omxMALJh0IhTowgAAAAAAA==\",     \"_self\": \"dbs/omxMAA==/colls/omxMALJh0Ig=/docs/omxMALJh0IhTowgAAAAAAA==/\",     \"_etag\": \"\\\"0200f067-0000-4200-0000-6355f1cd0000\\\"\",     \"_attachments\": \"attachments/\",     \"_ts\": 1666576845 }";
                //long now = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
                //JsonNode node = JsonNode.Parse(json);
                //if (node != null)
                //{
                //    var pdfNode = node["pdf"];
                //    var id = node["id"];
                //    var code = node["code"];
                //    if (pdfNode != null)
                //    {
                //        pdfNode["url"] = "aaaa";
                //        pdfNode["blob"] = $"/art/";
                //        pdfNode["createTime"] = now;
                //       // node["pdf"] = pdfNode;
                //    }
                //    else {
                //        pdfNode = new JsonObject();
                //        pdfNode["url"] = "aaaa";
                //        pdfNode["blob"] = $"/art/";
                //        pdfNode["createTime"] = now;
                //        node["pdf"] = pdfNode;
                //    }
                //    byte[] bytes = Encoding.UTF8.GetBytes(node.ToString());
                //    var memoryStream = new MemoryStream(bytes);
                //    await _azureCosmosFactory.GetCosmosClient().GetContainer("TEAMModelOS", "Student").ReplaceItemStreamAsync(memoryStream, $"{id}", new Azure.Cosmos.PartitionKey($"{code}"));
                //}
                IReadOnlyList<ServiceBusReceivedMessage> receivedMessages = await _receiver.ReceiveMessagesAsync(maxMessages: 1);
                //单条数据 5 分钟未释放。进入死信
                foreach (ServiceBusReceivedMessage receivedMessage in receivedMessages)
                {
                    try
                    {
                        string body = receivedMessage.Body.ToString();
                        ScreenshotDto? screenshot = JsonSerializer.Deserialize<ScreenshotDto>(body);
                        await _receiver.CompleteMessageAsync(receivedMessage);
                        List<(string name ,string url)> urls=  await ScreenService.ScreenshotPdf(screenshot, _azureStorage);
                        await ScreenService.UpdateStuArtPDF(urls.Select(z=>z.url), screenshot, _azureRedisFactory, _azureCosmosFactory);
                    } catch
                    {
                        //失败则放回队列死信中 
                        await _receiver.DeadLetterMessageAsync(receivedMessage);
                    }
                }
                //cpu空转一次
                spinWait.SpinOnce();
            } 
        }
    }
}