using System.ComponentModel.DataAnnotations;

namespace Domain.Entities.Stocks;

/// <summary>
/// SEIBro 단주대금 정보 (getOddLotInfo) — 단주대금 사유·산정기준·권리락일 (Wave 3).
/// 자연키 UNIQUE (IssucoCustno, PayDate, RgtStdDt) — 회사·지급일·권리기준일당 1행.
/// 이벤트 구동: PaymentSchedule 중 PAY_COST_TPCD=3(단주) 인 (회사번호, 지급일)을 트리거로 수집한다.
/// ⚠️ 응답엔 ISSUCO_CUSTNO·지급일(TH1_PAY_TERM_BEGIN_DT)이 없어 요청값을 스탬핑한다.
/// </summary>
public class OddLotPayment
{
    [Key]
    public int ID { get; private set; }

    /// <summary>발행회사 고객번호 (ISSUCO_CUSTNO, 요청 스탬핑)</summary>
    public int IssucoCustno { get; private set; }

    /// <summary>대금지급일 (TH1_PAY_TERM_BEGIN_DT, 요청 스탬핑)</summary>
    public DateOnly PayDate { get; private set; }

    /// <summary>권리기준일자 (RGT_STD_DT)</summary>
    public DateOnly RgtStdDt { get; private set; }

    /// <summary>권리사유코드 (RGT_RACD)</summary>
    public string? RgtRacd { get; private set; }

    /// <summary>권리사유명 (RGT_RACD_NM) — 예 무상증자</summary>
    public string? RgtRacdNm { get; private set; }

    /// <summary>권리사유세부유형코드 (RGT_RSN_DTAIL_SORT_CD)</summary>
    public string? RgtRsnDetailSortCd { get; private set; }

    /// <summary>산정기준구분코드 (ESTM_STD_TPCD) — 04상장일종가 10액면가 …</summary>
    public string? EstmStdTpcd { get; private set; }

    /// <summary>산정기준일자 (ESTM_STD_DT)</summary>
    public DateOnly? EstmStdDt { get; private set; }

    /// <summary>산정기준가 (ESTM_STDPRC)</summary>
    public decimal? EstmStdprc { get; private set; }

    /// <summary>명부폐쇄시작일자 (ROST_CLOSE_BEGIN_DT)</summary>
    public DateOnly? RostCloseBeginDt { get; private set; }

    /// <summary>명부폐쇄종료일자 (ROST_CLOSE_EXPRY_DT)</summary>
    public DateOnly? RostCloseExpryDt { get; private set; }

    /// <summary>권리락일자 (XRGT_DT)</summary>
    public DateOnly? XrgtDt { get; private set; }

    public DateTime UpdatedAt { get; private set; } = DateTime.UtcNow;

    private OddLotPayment() { }

    public static OddLotPayment Create(
        int issucoCustno,
        DateOnly payDate,
        DateOnly rgtStdDt,
        string? rgtRacd,
        string? rgtRacdNm,
        string? rgtRsnDetailSortCd,
        string? estmStdTpcd,
        DateOnly? estmStdDt,
        decimal? estmStdprc,
        DateOnly? rostCloseBeginDt,
        DateOnly? rostCloseExpryDt,
        DateOnly? xrgtDt)
    {
        return new OddLotPayment
        {
            IssucoCustno = issucoCustno,
            PayDate = payDate,
            RgtStdDt = rgtStdDt,
            RgtRacd = Trimmed(rgtRacd),
            RgtRacdNm = Trimmed(rgtRacdNm),
            RgtRsnDetailSortCd = Trimmed(rgtRsnDetailSortCd),
            EstmStdTpcd = Trimmed(estmStdTpcd),
            EstmStdDt = estmStdDt,
            EstmStdprc = estmStdprc,
            RostCloseBeginDt = rostCloseBeginDt,
            RostCloseExpryDt = rostCloseExpryDt,
            XrgtDt = xrgtDt
        };
    }

    /// <summary>재수집 반영 — 변경 필드가 있을 때만 UpdatedAt 갱신 (자연키는 불변)</summary>
    public void Update(
        string? rgtRacd,
        string? rgtRacdNm,
        string? rgtRsnDetailSortCd,
        string? estmStdTpcd,
        DateOnly? estmStdDt,
        decimal? estmStdprc,
        DateOnly? rostCloseBeginDt,
        DateOnly? rostCloseExpryDt,
        DateOnly? xrgtDt)
    {
        var changed = false;

        changed |= Set(Trimmed(rgtRacd), RgtRacd, v => RgtRacd = v);
        changed |= Set(Trimmed(rgtRacdNm), RgtRacdNm, v => RgtRacdNm = v);
        changed |= Set(Trimmed(rgtRsnDetailSortCd), RgtRsnDetailSortCd, v => RgtRsnDetailSortCd = v);
        changed |= Set(Trimmed(estmStdTpcd), EstmStdTpcd, v => EstmStdTpcd = v);
        changed |= Set(estmStdDt, EstmStdDt, v => EstmStdDt = v);
        changed |= Set(estmStdprc, EstmStdprc, v => EstmStdprc = v);
        changed |= Set(rostCloseBeginDt, RostCloseBeginDt, v => RostCloseBeginDt = v);
        changed |= Set(rostCloseExpryDt, RostCloseExpryDt, v => RostCloseExpryDt = v);
        changed |= Set(xrgtDt, XrgtDt, v => XrgtDt = v);

        if (changed)
        {
            UpdatedAt = DateTime.UtcNow;
        }
    }

    private static string? Trimmed(string? value)
    {
        return string.IsNullOrWhiteSpace(value) ? null : value.Trim();
    }

    private static bool Set<T>(T incoming, T current, Action<T> assign)
    {
        if (EqualityComparer<T>.Default.Equals(incoming, current))
        {
            return false;
        }

        assign(incoming);
        return true;
    }
}