namespace Infrastructure.StockData;

/// <summary>
/// SEIBro getDivSchedulInfo(배당일정) 응답 파서 — 순수 C#. 공용 SeibroXml envelope 입력.
/// 자연키(ISSUCO_CUSTNO, RGT_STD_DT, RGT_RSN_DTAIL_SORT_CD) 중 하나라도 없거나 회사번호 비숫자·기준일 비형식이면 건너뛴다.
/// 날짜 필드는 YYYYMMDD→DateOnly (빈값 null), ELTSC_YN 은 Y/N→bool (그 외 null).
/// </summary>
public static class SeibroDivSchedulParser
{
    public sealed record Row(
        int IssucoCustno,
        string RepSecnNm,
        string? RgtRacd,
        string RgtRsnDetailSortCd,
        DateOnly RgtStdDt,
        string? AllocWhcd,
        string? SetaccTpcd,
        string? FixTpcd,
        DateOnly? RostCloseBeginDt,
        DateOnly? RostCloseExpryDt,
        DateOnly? XrgtDt,
        bool? IsElectronicSecurity
    );

    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 repSecnNm = SeibroXml.GetOrNull(fields, "REP_SECN_NM")?.Trim();
            var sortCd = SeibroXml.GetOrNull(fields, "RGT_RSN_DTAIL_SORT_CD")?.Trim();
            var rgtStdDt = SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "RGT_STD_DT"));

            if (custno is null || string.IsNullOrEmpty(repSecnNm) || string.IsNullOrEmpty(sortCd) || rgtStdDt is null)
            {
                continue;
            }

            rows.Add(new Row(
                custno.Value,
                repSecnNm,
                SeibroXml.GetOrNull(fields, "RGT_RACD")?.Trim(),
                sortCd,
                rgtStdDt.Value,
                SeibroXml.GetOrNull(fields, "ALOC_WHCD")?.Trim(),
                SeibroXml.GetOrNull(fields, "SETACC_TPCD")?.Trim(),
                SeibroXml.GetOrNull(fields, "FIX_TPCD")?.Trim(),
                SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "ROST_CLOSE_BEGIN_DT")),
                SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "ROST_CLOSE_EXPRY_DT")),
                SeibroFieldParse.Date(SeibroXml.GetOrNull(fields, "XRGT_DT")),
                SeibroFieldParse.Yn(SeibroXml.GetOrNull(fields, "ELTSC_YN"))
            ));
        }

        return rows;
    }
}