namespace Infrastructure.StockData;

/// <summary>
/// SEIBro getStkIncdecDetails(주식증감내역) 응답 파서 — 순수 C#. 공용 SeibroXml envelope 입력.
/// 자연키(ISIN, SECN_ISSU_NTIMES, ISSU_DT, SECN_ISSU_RACD) 중 하나라도 없거나 비형식인 행은 건너뛴다.
/// ISSU_QTY 는 감소(소각) 시 음수 → Long 이 부호 보존. ISSUPRC 0 은 유효값(무상).
/// </summary>
public static class SeibroStkIncdecParser
{
    public sealed record Row(
        int? IssucoCustno,
        string Isin,
        string? SecnKacd,
        int SecnIssuNtimes,
        DateOnly IssuDt,
        decimal? Issuprc,
        long? IssuQty,
        string SecnIssuRacd,
        string? SecnIssuNm,
        DateOnly? ListDt
    );

    public static IReadOnlyList<Row> Parse(SeibroXml.Envelope envelope)
    {
        var rows = new List<Row>();

        foreach (var fields in envelope.Rows)
        {
            var isin = SeibroXml.GetOrNull(fields, "ISIN")?.Trim();
            var ntimes = SeibroFieldParse.Int(SeibroXml.GetOrNull(fields, "SECN_ISSU_NTIMES"));
            var issuDt = SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "ISSU_DT"));
            var racd = SeibroXml.GetOrNull(fields, "SECN_ISSU_RACD")?.Trim();

            if (string.IsNullOrEmpty(isin) || ntimes is null || issuDt is null || string.IsNullOrEmpty(racd))
            {
                continue;
            }

            rows.Add(new Row(
                SeibroFieldParse.Int(SeibroXml.GetOrNull(fields, "ISSUCO_CUSTNO")),
                isin,
                SeibroXml.GetOrNull(fields, "SECN_KACD")?.Trim(),
                ntimes.Value,
                issuDt.Value,
                SeibroFieldParse.Decimal(SeibroXml.GetOrNull(fields, "ISSUPRC")),
                SeibroFieldParse.Long(SeibroXml.GetOrNull(fields, "ISSU_QTY")),
                racd,
                SeibroXml.GetOrNull(fields, "SECN_ISSU_NM")?.Trim(),
                SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "LIST_DT"))
            ));
        }

        return rows;
    }
}