using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using TeamAAS.Communication.Interfaces;

namespace TeamAAS.Communication.LightSources
{
    /// <summary>
    /// 光源控制器 - 整合串口通信与光源协议，提供 KCS/TSD 光源的统一控制接口
    /// </summary>
    public class LightSourceController : IDisposable
    {
        private ICommunication _comm;
        private readonly LightModel _model;
        private readonly int _channelCount;

        public string Name { get; set; } = "光源";
        public bool IsConnected => _comm?.IsConnected ?? false;
        public LightModel Model => _model;
        public int ChannelCount => _channelCount;

        /// <summary>
        /// 当前各通道亮度值 (0-255)
        /// </summary>
        public Dictionary<int, int> ChannelBrightness { get; } = new Dictionary<int, int>();

        public event Action<string> LogMessage;

        public LightSourceController(LightModel model, int channelCount)
        {
            _model = model;
            _channelCount = channelCount;
            for (int i = 0; i < channelCount; i++)
                ChannelBrightness[i] = 0;
        }

        public void AttachCommunication(ICommunication comm)
        {
            _comm = comm;
        }

        public async Task<bool> ConnectAsync()
        {
            if (_comm == null) { Log("未绑定通讯设备"); return false; }
            try
            {
                if (!_comm.IsConnected)
                    await _comm.ConnectAsync();
                Log($"已连接 ({_comm.Name})");
                return true;
            }
            catch (Exception ex)
            {
                Log($"连接失败: {ex.Message}");
                return false;
            }
        }

        public void Disconnect()
        {
            try { _comm?.Disconnect(); } catch { }
            Log("已断开");
        }

        public async Task<bool> SetBrightnessAsync(int channel, int brightness, int timeoutMs = 1000)
        {
            if (channel < 1 || channel > _channelCount) { Log($"CH口超出范围: {channel}"); return false; }
            if (brightness < 0) brightness = 0;
            if (brightness > 255) brightness = 255;

            int idx = channel - 1;
            bool ok;

            switch (_model)
            {
                case LightModel.TSD_DPA12024V_4T_3_0:
                    {
                        string tsCmd = TSDLightProtocol.BuildSetBrightnessCommand(idx, brightness);
                        var resp1 = await SendAndWaitAsync(tsCmd, timeoutMs);
                        ok = TSDLightProtocol.VerifyResponse(resp1);
                    }
                    break;
                default:
                    {
                        string kcsCmd = KCSLightProtocol.BuildSetBrightnessCommand(idx, brightness);
                        var resp2 = await SendAndWaitAsync(kcsCmd, timeoutMs);
                        ok = KCSLightProtocol.VerifySetResponse(resp2, idx);
                    }
                    break;
            }

            if (ok)
            {
                ChannelBrightness[idx] = brightness;
                Log($"CH{channel} → {brightness} ✓");
            }
            else
            {
                Log($"CH{channel} → {brightness} ✗ (超时或无响应)");
            }
            return ok;
        }

        public async Task<bool> TurnOnAllAsync(int timeoutMs = 1000)
        {
            bool allOk = true;
            switch (_model)
            {
                case LightModel.TSD_DPA12024V_4T_3_0:
                    foreach (string tsCmd in TSDLightProtocol.BuildTurnOnAllCommands(_channelCount))
                    {
                        var resp = await SendAndWaitAsync(tsCmd, timeoutMs);
                        if (!TSDLightProtocol.VerifyResponse(resp)) allOk = false;
                    }
                    break;
                default:
                    int br = ChannelBrightness.Values.FirstOrDefault(v => v > 0);
                    if (br == 0) br = 120;
                    string kcsCmd = KCSLightProtocol.BuildTurnOnAllCommand(_channelCount, br);
                    var resp2 = await SendAndWaitAsync(kcsCmd, timeoutMs);
                    allOk = KCSLightProtocol.VerifyAllResponse(resp2);
                    break;
            }
            Log(allOk ? "全开 ✓" : "全开 ✗");
            return allOk;
        }

        public async Task<bool> TurnOffAllAsync(int timeoutMs = 1000)
        {
            bool allOk = true;
            switch (_model)
            {
                case LightModel.TSD_DPA12024V_4T_3_0:
                    foreach (string tsCmd in TSDLightProtocol.BuildTurnOffAllCommands(_channelCount))
                    {
                        var resp = await SendAndWaitAsync(tsCmd, timeoutMs);
                        if (!TSDLightProtocol.VerifyResponse(resp)) allOk = false;
                    }
                    break;
                default:
                    string kcsCmd = KCSLightProtocol.BuildTurnOffAllCommand(_channelCount);
                    var resp2 = await SendAndWaitAsync(kcsCmd, timeoutMs);
                    allOk = KCSLightProtocol.VerifyAllResponse(resp2);
                    break;
            }
            if (allOk)
            {
                for (int i = 0; i < _channelCount; i++)
                    ChannelBrightness[i] = 0;
            }
            Log(allOk ? "全关 ✓" : "全关 ✗");
            return allOk;
        }

        public async Task<int> ReadBrightnessAsync(int channel, int timeoutMs = 1000)
        {
            if (channel < 1 || channel > _channelCount) return 0;
            int idx = channel - 1;
            int brightness;

            switch (_model)
            {
                case LightModel.TSD_DPA12024V_4T_3_0:
                    {
                        string tsCmd = TSDLightProtocol.BuildReadCommand(idx);
                        var resp1 = await SendAndWaitAsync(tsCmd, timeoutMs);
                        brightness = TSDLightProtocol.ParseReadResponse(resp1);
                    }
                    break;
                default:
                    {
                        bool useSR = _model == LightModel.KCS_KDC3_24V300W_8T;
                        string kcsCmd = KCSLightProtocol.BuildReadCommand(idx, useSR);
                        var resp2 = await SendAndWaitAsync(kcsCmd, timeoutMs);
                        brightness = KCSLightProtocol.ParseReadResponse(resp2);
                    }
                    break;
            }

            ChannelBrightness[idx] = brightness;
            Log($"读CH{channel}: {brightness}");
            return brightness;
        }

        private async Task<string> SendAndWaitAsync(string command, int timeoutMs)
        {
            if (_comm == null || !_comm.IsConnected) return null;

            string response = null;
            var mre = new ManualResetEventSlim(false);
            Action<object, string> handler = (s, msg) =>
            {
                response = msg;
                mre.Set();
            };

            _comm.DataReceivedEvent += handler;
            try
            {
                _comm.WriteValue("", command);
                if (await Task.Run(() => mre.Wait(timeoutMs)))
                    return response;
            }
            finally
            {
                _comm.DataReceivedEvent -= handler;
            }
            return null;
        }

        private void Log(string msg)
        {
            LogMessage?.Invoke($"[{_model}] {msg}");
        }

        public void Dispose()
        {
            try { _comm?.Disconnect(); } catch { }
        }
    }
}