using Azure.Messaging.ServiceBus;
using Microsoft.Extensions.Hosting;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.ServiceModel.Channels;
using System.Text;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using TEAMModelOS.SDK.DI;
using TEAMModelOS.SDK.Extension;
using TEAMModelOS.SDK.Models;
using TEAMModelOS.SDK.Services;
using static TEAMModelOS.FunctionV4.IESHttpTrigger;

namespace TEAMModelOS.FunctionV4
{
    public class BlobRootServiceBusSub : BackgroundService, IDisposable
    {
        private readonly AzureStorageFactory _azureStorage;
        private readonly AzureRedisFactory _azureRedis;
        private readonly ServiceBusReceiver _receiver;
        private readonly DingDing _dingDing;
        private const string Channel = "BlobRoot";
        public static SpinWait spinWait = new SpinWait(); // 构造SpinWait实例
        public BlobRootServiceBusSub(DingDing dingDing, AzureRedisFactory azureRedisFactory,  AzureStorageFactory azureStorage, AzureServiceBusFactory azureService)
        {
            _receiver = azureService.GetServiceBusClient().CreateReceiver(Environment.GetEnvironmentVariable("Azure:ServiceBus:ActiveTask"), Channel, new ServiceBusReceiverOptions { ReceiveMode = ServiceBusReceiveMode.PeekLock });
            _azureStorage = azureStorage;
            _azureRedis = azureRedisFactory;
            _dingDing = dingDing;
        }
        protected async override Task ExecuteAsync(CancellationToken stoppingToken)
        {
            while (true)
            {
                //30分钟。进入死信
                IReadOnlyList<ServiceBusReceivedMessage> receivedMessages = await _receiver.ReceiveMessagesAsync(maxMessages: 1,maxWaitTime:new TimeSpan(0,30,0));
                foreach (ServiceBusReceivedMessage receivedMessage in receivedMessages)
                {
                    try
                    {
                        string body = receivedMessage.Body.ToString();
                        var jsonMsg = body.ToObject<BlobRefreshMessage>();
                        if ( !string.IsNullOrWhiteSpace($"{jsonMsg.root}") && !string.IsNullOrWhiteSpace($"{jsonMsg.name}"))
                        {
                            string lockKey = $"Blob:Lock:{jsonMsg.name}:{jsonMsg.root}";
                            bool exist = await _azureRedis.GetRedisClient(8).KeyExistsAsync(lockKey);
                            if (exist) {
                                string[] uls = System.Web.HttpUtility.UrlDecode($"{jsonMsg.root}", Encoding.UTF8).Split("/");
                                string u = !string.IsNullOrEmpty(uls[0]) ? uls[0] : uls[1];
                                string name = $"{jsonMsg.name}";
                                await RefreshBlob(name, u);
                                await _azureRedis.GetRedisClient(8).KeyDeleteAsync(lockKey);
                            }
                        }
                        await _receiver.CompleteMessageAsync(receivedMessage);
                    }
                    catch
                    {
                        //失败则放回队列死信中 
                        await _receiver.DeadLetterMessageAsync(receivedMessage);
                    }
                }
                //cpu空转一次
                spinWait.SpinOnce();
            }
        }
 

      
        private async Task RefreshBlob(string name, string u)
        {
            long statr = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
            var client = _azureStorage.GetBlobContainerClient(name);
            var size = await client.GetBlobsSize(u);
            await _azureRedis.GetRedisClient(8).SortedSetRemoveAsync($"Blob:Catalog:{name}", u);
            await _azureRedis.GetRedisClient(8).SortedSetIncrementAsync($"Blob:Catalog:{name}", u, size.HasValue ? size.Value : 0);
            var scores = await _azureRedis.GetRedisClient(8).SortedSetRangeByRankWithScoresAsync($"Blob:Catalog:{name}");
            double blobsize = 0;
            if (scores != default && scores != null)
            {
                foreach (var score in scores)
                {
                    blobsize = blobsize + score.Score;
                }
            }
            if (blobsize > 0) {
                await _azureRedis.GetRedisClient(8).HashSetAsync($"Blob:Record", new RedisValue(name), new RedisValue($"{blobsize}"));
            }
            long end = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
            long dis = (end - statr) / 1000;
            long timeout = 60 * 5;
            if (dis > timeout)
            {
                await _dingDing.SendBotMsg($"ServiceBus,RefreshBlob:空间计算已经超过{timeout}秒\n容器名：{name}\n文件夹：{u}\n计算时长：{dis}\n文件夹大小：{blobsize}", GroupNames.醍摩豆服務運維群組);
            }
            //await _dingDing.SendBotMsg($"ServiceBus,RefreshBlob:\n容器名：{name}\n文件夹：{u}\n计算时长：{dis}\n文件夹大小：{blobsize}", GroupNames.醍摩豆服務運維群組);
        }
    }
}