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

namespace Domain.Entities.Stocks;

/// <summary>
/// 지수(시장) 일별 마감 시세 (KRX OpenAPI idx 엔드포인트) — (Series, IndexName, TradeDate) UNIQUE.
/// 한 계열(KOSPI/KOSDAQ/KRX) 안에 여러 지수(코스피/코스피200/… )가 존재하므로 IndexName 까지 UQ 에 포함한다.
/// 등락률은 정수 보관을 위해 %×100 basis point(Bp)로 저장 (예: -0.70% → -70, 1.45% → 145).
/// </summary>
public class IndexDailyPrice
{
    [Key]
    public long ID { get; private set; }

    /// <summary>계열 구분 (1=KOSPI, 2=KOSDAQ, 3=KRX)</summary>
    public MarketIndexSeries Series { get; private set; }

    /// <summary>지수명 (IDX_NM, 예: "코스피", "코스닥", "KRX 100")</summary>
    public string IndexName { get; private set; } = default!;

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

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

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

    /// <summary>등락률 basis point = %×100 (FLUC_RT)</summary>
    public int FlucRateBp { get; private set; }

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

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

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

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

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

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

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

    private IndexDailyPrice() { }

    public static IndexDailyPrice Create(
        MarketIndexSeries series,
        string indexName,
        DateOnly tradeDate,
        decimal close,
        decimal changeVal,
        int flucRateBp,
        decimal open,
        decimal high,
        decimal low,
        long volume,
        long value,
        long? marketCap = null
    ) {
        if (!Enum.IsDefined(series))
        {
            throw new ArgumentOutOfRangeException(nameof(series));
        }

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

        return new IndexDailyPrice
        {
            Series = series,
            IndexName = indexName.Trim(),
            TradeDate = tradeDate,
            Close = close,
            ChangeVal = changeVal,
            FlucRateBp = flucRateBp,
            Open = open,
            High = high,
            Low = low,
            Volume = volume,
            Value = value,
            MarketCap = marketCap
        };
    }

    /// <summary>동일 (Series, IndexName, TradeDate) 재수집 시 값 갱신 (upsert)</summary>
    public void Update(
        decimal close,
        decimal changeVal,
        int flucRateBp,
        decimal open,
        decimal high,
        decimal low,
        long volume,
        long value,
        long? marketCap = null
    ) {
        Close = close;
        ChangeVal = changeVal;
        FlucRateBp = flucRateBp;
        Open = open;
        High = high;
        Low = low;
        Volume = volume;
        Value = value;
        MarketCap = marketCap;
    }
}