using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TeamAAS_VP.Core.Lights
{
    public class KCSLightController : LightControllerBase
    {
        private readonly ICommunicationProtocol _protocol;
        private readonly Encoding _encoding;

        public KCSLightController(int id, ICommunicationProtocol protocol,int channelCount)
            : base(id, channelCount)
        {
            _protocol = protocol;
            _encoding = Encoding.ASCII;
        }

        protected override ILightChannel CreateChannel(int index)
        {
            return new KCSLightChannel(index, this);
        }

        public override async Task<bool> ConnectAsync()
        {
            var connected = await _protocol.ConnectAsync();
            if (connected)
            {
                IsConnected = true;
                await InitializeAsync();
            }
            return connected;
        }

        public override async Task DisconnectAsync()
        {
            await _protocol.DisconnectAsync();
            IsConnected = false;
        }

        public override async Task<bool> InitializeAsync()
        {
            try
            {
                // 初始化操作
                await GetChannelBrightnessInternal(0); // 测试通信
                return true;
            }
            catch
            {
                return false;
            }
        }

        public override async Task<bool> TurnOnAllAsync()
        {
            StringBuilder commandBuilder = new StringBuilder("S");
            for (int i = 0; i < ChannelCount; i++)
            {
                var channel = (KCSLightChannel)ChannelsInternal[i];
                commandBuilder.Append(channel.CurrentBrightness.ToString("D3"));
                commandBuilder.Append("T");
            }
            commandBuilder.Append("C#");

            var response = await SendCommandAsync(commandBuilder.ToString());
            return response?.Trim() == "!";
        }

        public override async Task<bool> TurnOffAllAsync()
        {
            StringBuilder commandBuilder = new StringBuilder("S");
            for (int i = 0; i < ChannelCount; i++)
            {
                commandBuilder.Append("000");
                commandBuilder.Append("F");
            }
            commandBuilder.Append("C#");

            var response = await SendCommandAsync(commandBuilder.ToString());
            return response?.Trim() == "!";
        }

        internal async Task<string> SendCommandAsync(string command)
        {
            var data = _encoding.GetBytes(command);
            var response = await _protocol.SendAndReceiveAsync(data, 1000);
            return _encoding.GetString(response);
        }

        internal async Task<int> GetChannelBrightnessInternal(int channelIndex)
        {
            string command = $"S{(char)('A' + channelIndex)}#";
            var response = await SendCommandAsync(command);

            if (response.Length == 5)
            {
                string valueStr = response.Substring(2, 3);
                if (int.TryParse(valueStr, out int brightness))
                {
                    return brightness;
                }
            }
            return 0;
        }

        internal async Task<bool> SetChannelBrightnessInternal(int channelIndex, int brightness)
        {
            string command = $"S{(char)('A' + channelIndex)}0{brightness.ToString("D3")}#";
            var response = await SendCommandAsync(command);
            return response?.Trim() == ((char)('A' + channelIndex)).ToString();
        }
    }
}