namespace Infrastructure.StockData;

/// <summary>
/// SEIBro getFmnmAltInfo(상호변경) 응답 파서 — 순수 C#. 공용 SeibroXml envelope 입력.
/// 자연키(ISSUCO_CUSTNO, RGT_STD_DT) 중 하나라도 없거나 비형식이면 건너뛴다.
/// 상호(전/후·국/영)·혼용유통기간·단일유통일 매핑.
/// </summary>
public static class SeibroFmnmAltParser
{
    public sealed record Row(
        int IssucoCustno,
        DateOnly RgtStdDt,
        string? FmnmBfaltKorNm,
        string? FmnmBfaltEngNm,
        string? FmnmAltKorNm,
        string? FmnmAltEngNm,
        DateOnly? MixusCirclBeginDt,
        DateOnly? MixusCirclExpryDt,
        DateOnly? UniCirclDt
    );

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

        foreach (var fields in envelope.Rows)
        {
            var custno = SeibroFieldParse.Int(SeibroXml.GetOrNull(fields, "ISSUCO_CUSTNO"));
            var rgtStdDt = SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "RGT_STD_DT"));

            if (custno is null || rgtStdDt is null)
            {
                continue;
            }

            rows.Add(new Row(
                custno.Value,
                rgtStdDt.Value,
                SeibroXml.GetOrNull(fields, "FMNM_BFALT_KOR_NM")?.Trim(),
                SeibroXml.GetOrNull(fields, "FMNM_BFALT_ENG_NM")?.Trim(),
                SeibroXml.GetOrNull(fields, "FMNM_ALT_KOR_NM")?.Trim(),
                SeibroXml.GetOrNull(fields, "FMNM_ALT_ENG_NM")?.Trim(),
                SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "MIXUS_CIRCL_BEGIN_DT")),
                SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "MIXUS_CIRCL_EXPRY_DT")),
                SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "UNI_CIRCL_DT"))
            ));
        }

        return rows;
    }
}