using UnrealDemoScanner.Web.Models;

namespace UnrealDemoScanner.Web.Services;

public sealed class DetectionParser
{
    public ScanOutputSummary Parse(string output, string jobId)
    {
        var findings = new List<ScanFinding>();
        var lines = output.Replace("\r\n", "\n").Split('\n');
        var now = DateTime.UtcNow;

        var detectedCount = 0;
        var warningCount = 0;
        var infoCount = 0;

        for (var i = 0; i < lines.Length; i++)
        {
            var line = lines[i].Trim();
            if (line.Length == 0)
            {
                continue;
            }

            string? kind = null;
            if (ContainsToken(line, "[DETECTED]") || ContainsToken(line, "[ОБНАРУЖЕНО]"))
            {
                kind = "detected";
                detectedCount++;
            }
            else if (ContainsToken(line, "[WARNING]") || ContainsToken(line, "[ПРЕДУПРЕЖДЕНИЕ]"))
            {
                kind = "warning";
                warningCount++;
            }
            else if (ContainsToken(line, "[INFO]") || ContainsToken(line, "[ИНФОРМАЦИЯ]") || ContainsToken(line, "[PLUGIN]"))
            {
                kind = "info";
                infoCount++;
            }

            if (kind is null)
            {
                continue;
            }

            findings.Add(new ScanFinding
            {
                JobId = jobId,
                Kind = kind,
                LineNumber = i + 1,
                Message = line,
                CreatedAtUtc = now
            });
        }

        return new ScanOutputSummary
        {
            Findings = findings,
            DetectedCount = detectedCount,
            WarningCount = warningCount,
            InfoCount = infoCount
        };
    }

    private static bool ContainsToken(string line, string token)
    {
        return line.IndexOf(token, StringComparison.OrdinalIgnoreCase) >= 0;
    }
}