using System.ComponentModel.DataAnnotations;

namespace Domain.Entities.Stocks;

/// <summary>
/// SEIBro 배당일정 (getDivSchedulInfo) — 현금/주식/동시/무배당 일정·명부폐쇄·권리락일 (Wave 1 ★P0).
/// 자연키 UNIQUE (IssucoCustno, RgtStdDt, RgtRsnDetailSortCd) — 한 회사·기준일에 배당 세부유형이 여럿(주식+현금 동시 등) 존재할 수 있다.
/// 날짜 스윕(getDivSchedulInfo, custno 미지정 → 그날 전체 회사)으로 수집한다.
/// </summary>
public class DividendSchedule
{
    [Key]
    public int ID { get; private set; }

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

    /// <summary>대표종목명 (REP_SECN_NM)</summary>
    public string RepSecnNm { get; private set; } = default!;

    /// <summary>권리사유코드 (RGT_RACD) — 103 배당/분배</summary>
    public string? RgtRacd { get; private set; }

    /// <summary>권리사유세부유형코드 (RGT_RSN_DTAIL_SORT_CD) — 01주식 02현금 03동시 04무배당</summary>
    public string RgtRsnDetailSortCd { get; private set; } = default!;

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

    /// <summary>배정방법코드 (ALOC_WHCD) — 1정율 2정액 3정율+정액</summary>
    public string? AllocWhcd { get; private set; }

    /// <summary>결산구분코드 (SETACC_TPCD) — 1결산 2반기 3분기</summary>
    public string? SetaccTpcd { get; private set; }

    /// <summary>확정구분코드 (FIX_TPCD) — 1확정 2예고 3미정</summary>
    public string? FixTpcd { 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; }

    /// <summary>전자증권 여부 (ELTSC_YN, Y=전자/N=예탁) — 미제공 null</summary>
    public bool? IsElectronicSecurity { get; private set; }

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

    private DividendSchedule() { }

    public static DividendSchedule Create(
        int issucoCustno,
        string repSecnNm,
        string? rgtRacd,
        string rgtRsnDetailSortCd,
        DateOnly rgtStdDt,
        string? allocWhcd,
        string? setaccTpcd,
        string? fixTpcd,
        DateOnly? rostCloseBeginDt,
        DateOnly? rostCloseExpryDt,
        DateOnly? xrgtDt,
        bool? isElectronicSecurity)
    {
        if (string.IsNullOrWhiteSpace(repSecnNm))
        {
            throw new ArgumentException("repSecnNm required", nameof(repSecnNm));
        }

        if (string.IsNullOrWhiteSpace(rgtRsnDetailSortCd))
        {
            throw new ArgumentException("rgtRsnDetailSortCd required", nameof(rgtRsnDetailSortCd));
        }

        return new DividendSchedule
        {
            IssucoCustno = issucoCustno,
            RepSecnNm = repSecnNm.Trim(),
            RgtRacd = string.IsNullOrWhiteSpace(rgtRacd) ? null : rgtRacd.Trim(),
            RgtRsnDetailSortCd = rgtRsnDetailSortCd.Trim(),
            RgtStdDt = rgtStdDt,
            AllocWhcd = string.IsNullOrWhiteSpace(allocWhcd) ? null : allocWhcd.Trim(),
            SetaccTpcd = string.IsNullOrWhiteSpace(setaccTpcd) ? null : setaccTpcd.Trim(),
            FixTpcd = string.IsNullOrWhiteSpace(fixTpcd) ? null : fixTpcd.Trim(),
            RostCloseBeginDt = rostCloseBeginDt,
            RostCloseExpryDt = rostCloseExpryDt,
            XrgtDt = xrgtDt,
            IsElectronicSecurity = isElectronicSecurity
        };
    }

    /// <summary>재수집 반영 — 변경 필드가 있을 때만 UpdatedAt 갱신 (무변경 upsert 는 no-op)</summary>
    public void Update(
        string repSecnNm,
        string? rgtRacd,
        string? allocWhcd,
        string? setaccTpcd,
        string? fixTpcd,
        DateOnly? rostCloseBeginDt,
        DateOnly? rostCloseExpryDt,
        DateOnly? xrgtDt,
        bool? isElectronicSecurity)
    {
        var changed = false;

        if (!string.IsNullOrWhiteSpace(repSecnNm) && RepSecnNm != repSecnNm.Trim())
        {
            RepSecnNm = repSecnNm.Trim();
            changed = true;
        }

        var normalizedRacd = string.IsNullOrWhiteSpace(rgtRacd) ? null : rgtRacd.Trim();
        if (RgtRacd != normalizedRacd)
        {
            RgtRacd = normalizedRacd;
            changed = true;
        }

        var normalizedAllocWhcd = string.IsNullOrWhiteSpace(allocWhcd) ? null : allocWhcd.Trim();
        if (AllocWhcd != normalizedAllocWhcd)
        {
            AllocWhcd = normalizedAllocWhcd;
            changed = true;
        }

        var normalizedSetaccTpcd = string.IsNullOrWhiteSpace(setaccTpcd) ? null : setaccTpcd.Trim();
        if (SetaccTpcd != normalizedSetaccTpcd)
        {
            SetaccTpcd = normalizedSetaccTpcd;
            changed = true;
        }

        var normalizedFixTpcd = string.IsNullOrWhiteSpace(fixTpcd) ? null : fixTpcd.Trim();
        if (FixTpcd != normalizedFixTpcd)
        {
            FixTpcd = normalizedFixTpcd;
            changed = true;
        }

        if (RostCloseBeginDt != rostCloseBeginDt)
        {
            RostCloseBeginDt = rostCloseBeginDt;
            changed = true;
        }

        if (RostCloseExpryDt != rostCloseExpryDt)
        {
            RostCloseExpryDt = rostCloseExpryDt;
            changed = true;
        }

        if (XrgtDt != xrgtDt)
        {
            XrgtDt = xrgtDt;
            changed = true;
        }

        if (IsElectronicSecurity != isElectronicSecurity)
        {
            IsElectronicSecurity = isElectronicSecurity;
            changed = true;
        }

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