namespace Core.Parsers.EventOccurrence;

/// <summary>
/// Classifies lines to determine if they should be skipped during parsing.
/// </summary>
public static class LineClassifier
{
    /// <summary>
    /// Checks if a line is empty or contains only whitespace.
    /// </summary>
    public static bool IsEmptyLine(string line)
    {
        return string.IsNullOrWhiteSpace(line);
    }

    /// <summary>
    /// Checks if a line is a comment (starts with "#").
    /// </summary>
    public static bool IsCommentLine(string line)
    {
        return EventOccurrenceGrammar.IsCommentLine(line);
    }

    /// <summary>
    /// Determines if a line is a continuation/wrapped line that should be skipped.
    /// These are typically lines that:
    /// - Start with "*" (marks the start of a continuation block)
    /// - Are parenthetical notes like "(Semifinalists only)"
    /// </summary>
    public static bool IsContinuationLine(string line)
    {
        var trimmed = line.Trim();
        
        // Check if line starts with "*" (marks continuation block start)
        if (trimmed.StartsWith("*", StringComparison.Ordinal))
            return true;
        
        // Skip parenthetical notes
        if (trimmed.StartsWith("(", StringComparison.Ordinal) && trimmed.EndsWith(")", StringComparison.Ordinal))
            return true;
        
        return false;
    }
}