using System.ComponentModel.DataAnnotations;
using Domain.Entities.Stocks.ValueObject;

namespace Domain.Entities.Stocks;

/// <summary>
/// 증권상품(ETF/ETN/ELW) 일별매매 시세 (KRX OpenAPI etp 엔드포인트) — (EtpType, Code, TradeDate) UNIQUE.
/// 세 상품을 한 테이블에 담고 EtpType 으로 구분한다. 공통 컬럼(가격/거래/시총) + 유형별 nullable 컬럼:
///  - ETF/ETN 공통: Nav(ETF NAV / ETN 지표가치 IV), NetAssetTotal(순자산총액 / 지표가치총액), BaseIndexName·BaseIndexClose(기초지수명·종가)
///  - ELW: Underlying·UnderlyingClose(기초자산명·종가)
/// 등락률(ChangeRate)은 KrxStockParser 와 동일하게 소수 % 그대로 저장(Bp 아님). ELW 는 자체 등락률 필드가 없어 0.
/// 가격은 decimal(18,2) — ETF NAV·기초지수 종가에 소수가 있어 int 대신 decimal 로 통일.
/// </summary>
public class EtpDailyTrade
{
    [Key]
    public long ID { get; private set; }

    /// <summary>증권상품 구분 (1=ETF, 2=ETN, 3=ELW)</summary>
    public EtpType EtpType { get; private set; }

    /// <summary>단축코드 (ISU_CD) — ETF/ETN 은 6자리 숫자, ELW 는 영숫자 6자리(예: 58K001)</summary>
    public string Code { get; private set; } = default!;

    /// <summary>종목명 (ISU_NM)</summary>
    public string Name { get; private set; } = default!;

    /// <summary>거래일 (BAS_DD)</summary>
    public DateOnly TradeDate { get; private set; }

    /// <summary>종가 (TDD_CLSPRC)</summary>
    public decimal Close { get; private set; }

    /// <summary>시가 (TDD_OPNPRC)</summary>
    public decimal Open { get; private set; }

    /// <summary>고가 (TDD_HGPRC)</summary>
    public decimal High { get; private set; }

    /// <summary>저가 (TDD_LWPRC)</summary>
    public decimal Low { get; private set; }

    /// <summary>전일 대비 (CMPPREVDD_PRC)</summary>
    public decimal ChangeAmount { get; private set; }

    /// <summary>등락률 % (FLUC_RT) — ELW 는 자체 등락률이 없어 0</summary>
    public decimal ChangeRate { get; private set; }

    /// <summary>거래량 (ACC_TRDVOL)</summary>
    public long Volume { get; private set; }

    /// <summary>거래대금 (ACC_TRDVAL, 원)</summary>
    public long TradeValue { get; private set; }

    /// <summary>시가총액 (MKTCAP, 원) — 미제공 시 null</summary>
    public long? MarketCap { get; private set; }

    /// <summary>상장증권수/상장좌수 (LIST_SHRS) — 미제공 시 null</summary>
    public long? ListedShares { get; private set; }

    /// <summary>ETF NAV / ETN 지표가치(IV, PER1SECU_INDIC_VAL). ELW 는 null</summary>
    public decimal? Nav { get; private set; }

    /// <summary>ETF 순자산총액(INVSTASST_NETASST_TOTAMT) / ETN 지표가치총액(INDIC_VAL_AMT), 원. ELW 는 null</summary>
    public long? NetAssetTotal { get; private set; }

    /// <summary>기초지수명 (IDX_IND_NM) — ETF/ETN. ELW 는 null</summary>
    public string? BaseIndexName { get; private set; }

    /// <summary>기초지수 종가 (OBJ_STKPRC_IDX) — ETF/ETN. 미제공("")·ELW 는 null</summary>
    public decimal? BaseIndexClose { get; private set; }

    /// <summary>ELW 기초자산명 (ULY_NM). ETF/ETN 은 null</summary>
    public string? Underlying { get; private set; }

    /// <summary>ELW 기초자산 종가 (ULY_PRC). ETF/ETN 은 null</summary>
    public decimal? UnderlyingClose { get; private set; }

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

    private EtpDailyTrade() { }

    public static EtpDailyTrade Create(
        EtpType etpType,
        string code,
        string name,
        DateOnly tradeDate,
        decimal close,
        decimal open,
        decimal high,
        decimal low,
        decimal changeAmount,
        decimal changeRate,
        long volume,
        long tradeValue,
        long? marketCap = null,
        long? listedShares = null,
        decimal? nav = null,
        long? netAssetTotal = null,
        string? baseIndexName = null,
        decimal? baseIndexClose = null,
        string? underlying = null,
        decimal? underlyingClose = null
    ) {
        if (!Enum.IsDefined(etpType))
        {
            throw new ArgumentOutOfRangeException(nameof(etpType));
        }

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

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

        return new EtpDailyTrade
        {
            EtpType = etpType,
            Code = code.Trim(),
            Name = name.Trim(),
            TradeDate = tradeDate,
            Close = close,
            Open = open,
            High = high,
            Low = low,
            ChangeAmount = changeAmount,
            ChangeRate = changeRate,
            Volume = volume,
            TradeValue = tradeValue,
            MarketCap = marketCap,
            ListedShares = listedShares,
            Nav = nav,
            NetAssetTotal = netAssetTotal,
            BaseIndexName = baseIndexName,
            BaseIndexClose = baseIndexClose,
            Underlying = underlying,
            UnderlyingClose = underlyingClose
        };
    }

    /// <summary>동일 (EtpType, Code, TradeDate) 재수집 시 값 갱신 (upsert)</summary>
    public void Update(
        string name,
        decimal close,
        decimal open,
        decimal high,
        decimal low,
        decimal changeAmount,
        decimal changeRate,
        long volume,
        long tradeValue,
        long? marketCap = null,
        long? listedShares = null,
        decimal? nav = null,
        long? netAssetTotal = null,
        string? baseIndexName = null,
        decimal? baseIndexClose = null,
        string? underlying = null,
        decimal? underlyingClose = null
    ) {
        Name = name.Trim();
        Close = close;
        Open = open;
        High = high;
        Low = low;
        ChangeAmount = changeAmount;
        ChangeRate = changeRate;
        Volume = volume;
        TradeValue = tradeValue;
        MarketCap = marketCap;
        ListedShares = listedShares;
        Nav = nav;
        NetAssetTotal = netAssetTotal;
        BaseIndexName = baseIndexName;
        BaseIndexClose = baseIndexClose;
        Underlying = underlying;
        UnderlyingClose = underlyingClose;
    }
}