using System;
using System.ComponentModel;
using System.Threading.Tasks;
using HslCommunication.Profinet.Siemens;
using Newtonsoft.Json;
using TeamAAS.Communication.Attributes;
using TeamAAS.Communication.Base;

namespace TeamAAS.Communication.PLCs
{
    [Communication("西门子 S7", "PLC", "HslCommunication SiemensS7Net")]
    public class SiemensS7Plc : PlcCommunicationBase
    {
        [JsonIgnore] private SiemensS7Net _s7;
        [JsonIgnore] private bool _connected;

        public override string PlcVendor => "西门子 S7";

        private string _ipAddress = "127.0.0.1";
        [Category("II.连接配置"), DisplayName("IP 地址"), Description("PLC IP 地址")]
        public string IpAddress
        {
            get { return _ipAddress; }
            set { if (SetProperty(ref _ipAddress, value)) Notify(nameof(EndpointUrl)); }
        }

        private int _port = 102;
        [Category("II.连接配置"), DisplayName("端口"), Description("PLC 端口（默认 102）")]
        public int Port
        {
            get { return _port; }
            set { if (SetProperty(ref _port, value)) Notify(nameof(EndpointUrl)); }
        }

        private SiemensPLCS _plcType = SiemensPLCS.S1200;
        [Category("III.PLC 配置"), DisplayName("CPU 型号"), Description("西门子 S7 CPU 型号")]
        public SiemensPLCS PlcType
        {
            get { return _plcType; }
            set { SetProperty(ref _plcType, value); }
        }

        public override string EndpointUrl
        {
            get { return $"tcp://{IpAddress}:{Port}"; }
            set
            {
                if (!string.IsNullOrWhiteSpace(value) && value.StartsWith("tcp://"))
                {
                    var uri = new Uri(value);
                    IpAddress = uri.Host;
                    Port = uri.Port;
                }
            }
        }

        [JsonIgnore, Browsable(false)]
        public override bool IsConnected => _connected;

        public override event Action<object, bool> ConnectChangedEvent;
        public override event Action<object, string> DataReceivedEvent;

        public SiemensS7Plc() { }

        public override void Connect()
        {
            if (string.IsNullOrWhiteSpace(IpAddress))
                throw new InvalidOperationException("西门子 PLC IP 不能为空。");
            if (Port <= 0)
                throw new InvalidOperationException("西门子 PLC 端口必须大于 0。");

            Disconnect();
            _s7 = new SiemensS7Net(PlcType, IpAddress) { Port = Port, ConnectTimeOut = 2000 };
            var result = _s7.ConnectServer();
            if (!result.IsSuccess)
            {
                _s7 = null;
                throw new InvalidOperationException("西门子 PLC 连接失败: " + result.Message);
            }
            Driver = _s7;
            _connected = true;
            ConnectChangedEvent?.Invoke(this, true);
            Notify(nameof(IsConnected));
        }

        public override Task ConnectAsync() => Task.Run(() => Connect());

        public override void Disconnect()
        {
            _connected = false;
            Driver = null;
            if (_s7 != null)
            {
                try { _s7.ConnectClose(); } catch { }
                _s7 = null;
            }
            ConnectChangedEvent?.Invoke(this, false);
            Notify(nameof(IsConnected));
        }

        public override void Dispose() => Disconnect();
    }
}