using System;
using System.Text;

namespace TeamAAS.Communication.LightSources
{
    /// <summary>
    /// KCS 光源协议命令构造器
    /// 适用于 KDC-12V60W-4T / KDC3-24V300W-8T 等型号
    /// </summary>
    public static class KCSLightProtocol
    {
        /// <summary>
        /// 读取指定通道亮度
        /// KDC4: SA#  KDC8: SRA#
        /// </summary>
        public static string BuildReadCommand(int channelIndex, bool useSR = false)
        {
            char ch = (char)('A' + channelIndex);
            return useSR ? $"SR{ch}#" : $"S{ch}#";
        }

        /// <summary>
        /// 设置指定通道亮度
        /// SA0120#  (通道A, 亮度120)
        /// </summary>
        public static string BuildSetBrightnessCommand(int channelIndex, int brightness)
        {
            char ch = (char)('A' + channelIndex);
            int br = Math.Max(0, Math.Min(999, brightness));
            return $"S{ch}0{br.ToString("D3")}#";
        }

        /// <summary>
        /// 全开所有通道（使用当前亮度值）
        /// S{DDD}T{DDD}T...C#
        /// </summary>
        public static string BuildTurnOnAllCommand(int channelCount, int defaultBrightness = 120)
        {
            var sb = new StringBuilder("S");
            int br = Math.Max(0, Math.Min(999, defaultBrightness));
            for (int i = 0; i < channelCount; i++)
            {
                sb.Append(br.ToString("D3"));
                sb.Append("T");
            }
            sb.Append("C#");
            return sb.ToString();
        }

        /// <summary>
        /// 全关所有通道
        /// S000F000F...C#
        /// </summary>
        public static string BuildTurnOffAllCommand(int channelCount)
        {
            var sb = new StringBuilder("S");
            for (int i = 0; i < channelCount; i++)
            {
                sb.Append("000");
                sb.Append("F");
            }
            sb.Append("C#");
            return sb.ToString();
        }

        /// <summary>
        /// 解析读取响应，返回亮度值
        /// 响应格式: ?XDDD (5字符) 或 7字符
        /// </summary>
        public static int ParseReadResponse(string response)
        {
            if (string.IsNullOrEmpty(response)) return 0;
            try
            {
                if (response.Length == 5)
                {
                    string val = response.Substring(2, 3);
                    if (int.TryParse(val, out int br)) return br;
                }
                else if (response.Length == 7)
                {
                    string val = response.Substring(3, 3);
                    if (int.TryParse(val, out int br)) return br;
                }
            }
            catch { }
            return 0;
        }

        /// <summary>
        /// 验证设置响应是否成功
        /// 成功: 返回通道字母 (如 "A") 或 "!"
        /// </summary>
        public static bool VerifySetResponse(string response, int channelIndex)
        {
            if (string.IsNullOrEmpty(response)) return false;
            string trimmed = response.Trim();
            if (trimmed == "!") return true;
            return trimmed == ((char)('A' + channelIndex)).ToString();
        }

        /// <summary>
        /// 验证全开/全关响应
        /// 成功: 返回 "!"
        /// </summary>
        public static bool VerifyAllResponse(string response)
        {
            return !string.IsNullOrEmpty(response) && response.Trim() == "!";
        }
    }
}