using System.Text.RegularExpressions;
using WCTDataMiner.Core.Models;

namespace WCTDataMiner.Core.Parsers;

/// <summary>
/// Ploss FOD日志解析器 - 支持两行格式
/// 第一行: pow_loss = 3053, delta_p = 1950
/// 第二行: FOD-> (1) (2) ... (16)
/// 同时兼容旧的单行格式
/// </summary>
public class PlossParser : IParser<PlossRecord>
{
    // 第一行正则：pow_loss = 3053, delta_p = 1950
    private static readonly Regex HeaderPattern = new(
        @"^pow_loss\s*=\s*(\d+),\s*delta_p\s*=\s*(\d+)$",
        RegexOptions.Compiled
    );

    // 第二行正则：FOD-> 后跟16个数字（均支持负数）
    private static readonly Regex FodPattern = new(
        @"^FOD->\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)$",
        RegexOptions.Compiled
    );

    // 旧格式正则（兼容）：前3个字段被忽略，所有捕获组支持负数
    private static readonly Regex LegacyPattern = new(
        @"^FOD->\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)$",
        RegexOptions.Compiled
    );

    /// <summary>
    /// 判断是否可以解析该行（任意一行）
    /// </summary>
    public bool CanParse(string line) =>
        HeaderPattern.IsMatch(line) || FodPattern.IsMatch(line) || LegacyPattern.IsMatch(line);

    /// <summary>
    /// 判断是否为多行记录的起始行（header行）
    /// </summary>
    public bool IsMultiLineStart(string line) => HeaderPattern.IsMatch(line);

    /// <summary>
    /// 单行解析（兼容旧格式）
    /// </summary>
    public ParseResult<PlossRecord> Parse(string line, Guid scenarioId)
    {
        // 尝试匹配旧格式
        var legacyMatch = LegacyPattern.Match(line);
        if (legacyMatch.Success)
        {
            return ParseLegacyFormat(legacyMatch, scenarioId);
        }

        // 尝试匹配第二行（新格式）
        var fodMatch = FodPattern.Match(line);
        if (fodMatch.Success)
        {
            return ParseFodLine(fodMatch, scenarioId);
        }

        // 尝试匹配第一行
        var headerMatch = HeaderPattern.Match(line);
        if (headerMatch.Success)
        {
            return ParseHeaderLine(headerMatch, scenarioId);
        }

        return ParseResult<PlossRecord>.Failure(
            "FORMAT_MISMATCH",
            "Line does not match Ploss pattern"
        );
    }

    /// <summary>
    /// 多行解析（新两行格式）
    /// </summary>
    public ParseResult<PlossRecord>? ParseMultiLine(string[] lines, Guid scenarioId)
    {
        if (lines.Length < 2)
            return null;

        var headerMatch = HeaderPattern.Match(lines[0].Trim());
        var fodMatch = FodPattern.Match(lines[1].Trim());

        if (!headerMatch.Success || !fodMatch.Success)
            return null;

        try
        {
            var record = new PlossRecord
            {
                ScenarioId = scenarioId,
                // 第一行字段
                PowLoss = int.Parse(headerMatch.Groups[1].Value),
                DeltaP = int.Parse(headerMatch.Groups[2].Value),
                // 第二行字段
                Field1 = int.Parse(fodMatch.Groups[1].Value),
                Field2 = int.Parse(fodMatch.Groups[2].Value),
                Field3 = int.Parse(fodMatch.Groups[3].Value),
                Field4 = int.Parse(fodMatch.Groups[4].Value),
                Field5 = int.Parse(fodMatch.Groups[5].Value),
                Field6 = int.Parse(fodMatch.Groups[6].Value),
                Field7 = int.Parse(fodMatch.Groups[7].Value),
                Field8 = int.Parse(fodMatch.Groups[8].Value),
                Field9 = int.Parse(fodMatch.Groups[9].Value),  // 支持负数
                Field10 = int.Parse(fodMatch.Groups[10].Value),
                Field11 = int.Parse(fodMatch.Groups[11].Value),
                Field12 = int.Parse(fodMatch.Groups[12].Value),
                Field13 = int.Parse(fodMatch.Groups[13].Value),
                Field14 = int.Parse(fodMatch.Groups[14].Value),
                Field15 = int.Parse(fodMatch.Groups[15].Value),
                Field16 = int.Parse(fodMatch.Groups[16].Value)
            };

            return ParseResult<PlossRecord>.Success(record);
        }
        catch (Exception ex)
        {
            return ParseResult<PlossRecord>.Failure(
                "TYPE_CONVERSION",
                $"Failed to convert field: {ex.Message}"
            );
        }
    }

    private ParseResult<PlossRecord> ParseLegacyFormat(Match match, Guid scenarioId)
    {
        // 保持原有逻辑不变，映射到新字段名
        try
        {
            var record = new PlossRecord
            {
                ScenarioId = scenarioId,
                // 旧格式没有第一行字段
                PowLoss = null,
                DeltaP = null,
                // 映射到新字段名
                Field1 = int.Parse(match.Groups[1].Value),       // RxType
                Field2 = int.Parse(match.Groups[2].Value),    // RxPower
                Field3 = int.Parse(match.Groups[3].Value),    // TxPower
                Field4 = int.Parse(match.Groups[4].Value),    // Vcoil
                Field5 = int.Parse(match.Groups[5].Value),    // Vin
                Field6 = int.Parse(match.Groups[6].Value),    // Isns
                Field7 = int.Parse(match.Groups[7].Value),    // Ploss
                Field8 = int.Parse(match.Groups[8].Value),    // Threshold
                Field9 = int.Parse(match.Groups[9].Value),    // TriggerCount
                Field10 = int.Parse(match.Groups[10].Value),  // FodResult
                Field11 = int.Parse(match.Groups[11].Value),  // ProtocolType
                Field12 = int.Parse(match.Groups[12].Value),  // PwmDuty
                Field13 = int.Parse(match.Groups[13].Value),  // CoilIndex
                // 旧格式没有Field14-16，使用默认值
                Field14 = 0,
                Field15 = 0,
                Field16 = 0
            };
            return ParseResult<PlossRecord>.Success(record);
        }
        catch (Exception ex)
        {
            return ParseResult<PlossRecord>.Failure(
                "TYPE_CONVERSION",
                $"Failed to convert field: {ex.Message}"
            );
        }
    }

    private ParseResult<PlossRecord> ParseHeaderLine(Match match, Guid scenarioId)
    {
        // 单独解析header行，返回部分记录
        // 实际使用时应通过ParseMultiLine合并
        try
        {
            var record = new PlossRecord
            {
                ScenarioId = scenarioId,
                PowLoss = int.Parse(match.Groups[1].Value),
                DeltaP = int.Parse(match.Groups[2].Value)
            };
            return ParseResult<PlossRecord>.Success(record);
        }
        catch (Exception ex)
        {
            return ParseResult<PlossRecord>.Failure(
                "TYPE_CONVERSION",
                $"Failed to convert header field: {ex.Message}"
            );
        }
    }

    private ParseResult<PlossRecord> ParseFodLine(Match match, Guid scenarioId)
    {
        // 单独解析FOD行（新格式，无header）
        try
        {
            var record = new PlossRecord
            {
                ScenarioId = scenarioId,
                PowLoss = null,
                DeltaP = null,
                Field1 = byte.Parse(match.Groups[1].Value),
                Field2 = int.Parse(match.Groups[2].Value),
                Field3 = int.Parse(match.Groups[3].Value),
                Field4 = int.Parse(match.Groups[4].Value),
                Field5 = int.Parse(match.Groups[5].Value),
                Field6 = int.Parse(match.Groups[6].Value),
                Field7 = int.Parse(match.Groups[7].Value),
                Field8 = int.Parse(match.Groups[8].Value),
                Field9 = int.Parse(match.Groups[9].Value),
                Field10 = int.Parse(match.Groups[10].Value),
                Field11 = int.Parse(match.Groups[11].Value),
                Field12 = int.Parse(match.Groups[12].Value),
                Field13 = int.Parse(match.Groups[13].Value),
                Field14 = int.Parse(match.Groups[14].Value),
                Field15 = int.Parse(match.Groups[15].Value),
                Field16 = int.Parse(match.Groups[16].Value)
            };
            return ParseResult<PlossRecord>.Success(record);
        }
        catch (Exception ex)
        {
            return ParseResult<PlossRecord>.Failure(
                "TYPE_CONVERSION",
                $"Failed to convert FOD field: {ex.Message}"
            );
        }
    }
}