namespace General_Ledger_Service.Services.PdfDocuments
{
    // Shared amount-formatting rules for every report PDF (05_LKAS_Report_PDF_Templates.md
    // Section 9): thousands separator, 2 decimal places, round-half-up, negatives in
    // parentheses. Same rounding rule as CLAUDE.md Rule 13's FormatCellValue.
    public static class PdfFormatting
    {
        public static string FormatAmount(decimal value)
        {
            var rounded = Math.Round(value, 2, MidpointRounding.AwayFromZero);
            return rounded < 0 ? $"({Math.Abs(rounded):N2})" : rounded.ToString("N2");
        }

        // Blank instead of "0.00" - Trial Balance's Debit/Credit split (Section 2).
        public static string FormatAmountOrBlank(decimal value) =>
            value == 0 ? string.Empty : FormatAmount(value);

        // "—" instead of "0.00" - Tax Summary's Output/Input Tax columns (Section 8).
        public static string FormatAmountOrDash(decimal value) =>
            value == 0 ? "—" : FormatAmount(value);
    }
}