using System.Text.RegularExpressions;

namespace CoreAgent.Domain.Helpers;

/// <summary>
/// Linux WebSocket响应日志解析器
/// </summary>
public static class LinuxWsResponseParser
{
    private static readonly Regex _regexWs = new Regex(@"\{(?:[^{}]*|\{(?:[^{}]*|\{[^{}]*\})*\})*\}");

    /// <summary>
    /// 解析Linux WebSocket响应日志
    /// </summary>
    /// <param name="input">输入日志字符串</param>
    /// <returns>解析后的日志内容</returns>
    public static string ParseWsResultLogs(this string input)
    {
        try
        {
            return GetContentBetweenOuterCurlyBraces(input);
        }
        catch (Exception ex)
        {
            string msg = ex.Message;
            return "Parse Logs Data Is null";
        }
    }

    private static string GetContentBetweenOuterCurlyBraces(string input)
    {
        int openBraceIndex = input.IndexOf('{');
        if (openBraceIndex == -1)
        {
            return string.Empty; // 没有找到'{'
        }

        int closeBraceIndex = FindMatchingCloseBrace(input, openBraceIndex);
        if (closeBraceIndex == -1)
        {
            return string.Empty; // 没有找到匹配的'}'
        }

        // 提取并返回内容
        return input.Substring(openBraceIndex, closeBraceIndex - openBraceIndex + 1);
    }

    private static int FindMatchingCloseBrace(string input, int openBraceIndex)
    {
        int braceDepth = 1; // 从第一个'{'开始，深度为1
        for (int i = openBraceIndex + 1; i < input.Length; i++)
        {
            if (input[i] == '{')
            {
                braceDepth++; // 遇到'{'，深度增加
            }
            else if (input[i] == '}')
            {
                braceDepth--; // 遇到'}'，深度减少
                if (braceDepth == 0)
                {
                    return i; // 找到匹配的'}'，返回其索引
                }
            }
        }

        return -1; // 没有找到匹配的'}'
    }
}