using RabbitMQ.Client;
using System.Text;

namespace OpenAuth.WebApi.Model.RabbitMQService
{
    public class RabbitMqSender : IAsyncDisposable
    {
        private readonly IConnection _connection;
        private readonly IChannel _channel;
        private const string ExchangeName = "mps_event";
        private const string ExchangeType = "topic";

        public RabbitMqSender(IConnection connection, IChannel channel)
        {
            _connection = connection;
            _channel = channel;
        }
        public static async Task<RabbitMqSender> CreateAsync(string hostName, int port, string userName, string password)
        {
            var factory = new ConnectionFactory()
            {
                HostName = hostName,
                UserName = userName,
                Password = password,
                Port = port,
                AutomaticRecoveryEnabled = true, // 自动重连
                NetworkRecoveryInterval = TimeSpan.FromSeconds(5),
            };

            var connection = await factory.CreateConnectionAsync();
            var channel = await connection.CreateChannelAsync();
            await channel.ExchangeDeclareAsync(exchange: ExchangeName, type: ExchangeType, durable: true);
            //await channel.QueueDeclareAsync("sdhc", durable: true, exclusive: false, autoDelete: false);
            var queueOk = await channel.QueueDeclareAsync(queue: "",
                                                         durable: false,
                                                         exclusive: true,
                                                         autoDelete: true);
            await channel.QueueBindAsync(queueOk.QueueName, "mps_event", "event.capturePic.1.sdhc04");
            return new RabbitMqSender(connection, channel);
        }
        public async Task SendAsync(string routeKey, string message)
        {
            var body = Encoding.UTF8.GetBytes(message);
            var properties = new BasicProperties()
            {
                Persistent = true
            };
            // 监听 BasicReturn 事件
            _channel.BasicReturnAsync += (sender, args) =>
            {
                var returnedMessage = Encoding.UTF8.GetString(args.Body.ToArray());
                Console.WriteLine($"[BasicReturn] Message returned: {returnedMessage}");
                Console.WriteLine($"ReplyCode: {args.ReplyCode}, ReplyText: {args.ReplyText}");
                Console.WriteLine($"Exchange: {args.Exchange}, RoutingKey: {args.RoutingKey}");
                return Task.CompletedTask;
            };

            await _channel.BasicPublishAsync(exchange: "mps_event",
                                             routingKey: routeKey,
                                             mandatory: true,
                                             basicProperties: properties,
                                             body: body);

            Console.WriteLine($"[RabbitMQ] 已发送到routeKey {routeKey}：{message}");
        }
        public async ValueTask DisposeAsync()
        {
            if (_channel != null)
                await _channel.CloseAsync();

            if (_connection != null)
                await _connection.CloseAsync();
        }
    }
}