using Azure.Messaging.ServiceBus;
using HTEXScreen.Service;
using System.ServiceModel.Channels;
using System.Text.Json;
using TEAMModelOS.SDK.DI;

namespace HTEX.Screen.Service
{
    public class BookjsScreenSub : 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 = "genpdf";
        private readonly ServiceBusReceiver _receiver;
        public static SpinWait spinWait = new SpinWait(); // 构造SpinWait实例
        private readonly ILogger<BookjsScreenSub> _logger;
        public BookjsScreenSub(ILogger<BookjsScreenSub> logger, AzureRedisFactory azureRedisFactory, AzureCosmosFactory azureCosmosFactory, HttpClient httpClient, AzureStorageFactory azureStorage, AzureServiceBusFactory azureService)
        {
            _receiver = azureService.GetServiceBusClient("Default").CreateReceiver(Channel, new ServiceBusReceiverOptions { ReceiveMode= ServiceBusReceiveMode.PeekLock });
            _httpClient = httpClient;
            _azureStorage = azureStorage;
            _azureRedisFactory = azureRedisFactory;
            _azureCosmosFactory = azureCosmosFactory;
            _logger = logger;
        }
        protected async override Task ExecuteAsync(CancellationToken stoppingToken)
        {
            while (true)
            {
                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
                    {
                        _logger.LogInformation("Message ID: {id}", receivedMessage.MessageId);
                        _logger.LogInformation("Message Body: {body}", receivedMessage.Body);
                        _logger.LogInformation("Message Content-Type: {contentType}", receivedMessage.ContentType);
                        string body = receivedMessage.Body.ToString();
                        ScreenshotDto? screenshot = JsonSerializer.Deserialize<ScreenshotDto>(body);
                        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();
            }
        }

        /// <summary>
        /// 节点信息
        /// </summary>
        public record ScreenApiNode
        {
            /// <summary>
            /// 客户端id
            /// </summary>
            public string? clientId { get; set; }

            /// <summary>
            /// 描述
            /// </summary>
            public string? desc { get; set; }
            /// <summary>
            /// 服务域
            /// </summary>
            public string? domain { get; set; }
            /// <summary>
            /// 状态  busy 忙碌,free 空闲,down 离线
            /// </summary>
            public string? status { get; set; }
            /// <summary>
            /// 权重
            /// </summary>
            public int weight { get; set;}
        }
    }
}