using System.IO;

namespace Housing.Services;

public sealed class StartSignalSettings
{
    public bool Enabled { get; set; }
    public string Connection { get; set; } = "Ni6501";
    public string PhysicalChannel { get; set; } = "Dev1/port0/line0";
    public string ActiveState { get; set; } = "High";
    public string Host { get; set; } = string.Empty;
    public int Port { get; set; } = 5000;
    public string ReadCommand { get; set; } = string.Empty;
    public string ActiveResponse { get; set; } = "START,1,ON";
    public string ResponseMatch { get; set; } = "Contains";
    public string Terminator { get; set; } = "CRLF";
    public int ReadTimeoutMilliseconds { get; set; } = 1000;
    public int PollIntervalMilliseconds { get; set; } = 50;
    public int TimeoutMilliseconds { get; set; } = 30000;
    public int PostSignalDelayMilliseconds { get; set; } = 2000;
    public bool RequireInactiveBeforeStart { get; set; } = true;

    public bool IsActive(bool lineValue)
    {
        return string.Equals(ActiveState, "Low", StringComparison.OrdinalIgnoreCase)
            ? !lineValue
            : lineValue;
    }

    public static StartSignalSettings Load(string filePath)
    {
        if (!File.Exists(filePath))
        {
            throw new FileNotFoundException("Hardware.ini 파일을 찾을 수 없습니다.", filePath);
        }

        var values = IniFile.LoadSection(filePath, "StartSignal");
        return new StartSignalSettings
        {
            Enabled = GetBool(values, "Enabled", false),
            Connection = GetString(values, "Connection", "Ni6501"),
            PhysicalChannel = GetString(values, "PhysicalChannel", "Dev1/port0/line0"),
            ActiveState = GetString(values, "ActiveState", "High"),
            Host = GetString(values, "Host", string.Empty),
            Port = GetInt(values, "Port", 5000),
            ReadCommand = GetString(values, "ReadCommand", string.Empty),
            ActiveResponse = GetString(values, "ActiveResponse", "START,1,ON"),
            ResponseMatch = GetString(values, "ResponseMatch", "Contains"),
            Terminator = GetString(values, "Terminator", "CRLF"),
            ReadTimeoutMilliseconds = Math.Max(100, GetInt(values, "ReadTimeoutMilliseconds", 1000)),
            PollIntervalMilliseconds = Math.Max(10, GetInt(values, "PollIntervalMilliseconds", 50)),
            TimeoutMilliseconds = Math.Max(0, GetInt(values, "TimeoutMilliseconds", 30000)),
            PostSignalDelayMilliseconds = Math.Max(0, GetInt(values, "PostSignalDelayMilliseconds", 2000)),
            RequireInactiveBeforeStart = GetBool(values, "RequireInactiveBeforeStart", true)
        };
    }

    public string[] GetActiveResponses()
    {
        return ActiveResponse
            .Split(',', ';')
            .Select(value => value.Trim())
            .Where(value => !string.IsNullOrWhiteSpace(value))
            .ToArray();
    }

    public string GetTerminator()
    {
        return Terminator.Trim().ToUpperInvariant() switch
        {
            "CRLF" => "\r\n",
            "CR" => "\r",
            "LF" => "\n",
            "NONE" or "EMPTY" => string.Empty,
            _ => Terminator
        };
    }

    public bool IsActive(string response)
    {
        if (string.IsNullOrWhiteSpace(response))
        {
            return false;
        }

        var activeResponses = GetActiveResponses();
        if (activeResponses.Length == 0)
        {
            return false;
        }

        return string.Equals(ResponseMatch, "Equals", StringComparison.OrdinalIgnoreCase)
            ? activeResponses.Any(value => string.Equals(response.Trim(), value, StringComparison.OrdinalIgnoreCase))
            : activeResponses.Any(value => response.Contains(value, StringComparison.OrdinalIgnoreCase));
    }

    private static string GetString(Dictionary<string, string> values, string key, string defaultValue)
    {
        return values.TryGetValue(key, out var value) && !string.IsNullOrWhiteSpace(value)
            ? value.Trim()
            : defaultValue;
    }

    private static int GetInt(Dictionary<string, string> values, string key, int defaultValue)
    {
        return values.TryGetValue(key, out var value) && int.TryParse(value, out var result)
            ? result
            : defaultValue;
    }

    private static bool GetBool(Dictionary<string, string> values, string key, bool defaultValue)
    {
        if (!values.TryGetValue(key, out var value) || string.IsNullOrWhiteSpace(value))
        {
            return defaultValue;
        }

        return value.Trim().ToUpperInvariant() switch
        {
            "1" or "TRUE" or "YES" or "ON" => true,
            "0" or "FALSE" or "NO" or "OFF" => false,
            _ => defaultValue
        };
    }
}