using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace Domain.Entities.Stocks;

/// <summary>
/// T+1 일별 마감 시세 (금융위 주식시세 API) — (StockID, TradingDate) UNIQUE.
/// 수정주가 보정 없음 (액면분할 등 미반영 — 차트는 TradingView 위임).
/// </summary>
public class StockDailyPrice
{
    [ForeignKey(nameof(StockID))]
    public virtual Stock? Stock { get; private set; }

    [Key]
    public long ID { get; private set; }

    public int StockID { get; private set; }

    /// <summary>거래일 (basDt)</summary>
    public DateOnly TradingDate { get; private set; }

    /// <summary>시가</summary>
    public int Open { get; private set; }

    /// <summary>고가</summary>
    public int High { get; private set; }

    /// <summary>저가</summary>
    public int Low { get; private set; }

    /// <summary>종가</summary>
    public int Close { get; private set; }

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

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

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

    /// <summary>등락률 %</summary>
    public decimal ChangeRate { get; private set; }

    /// <summary>시가총액 (원)</summary>
    public long? MarketCap { get; private set; }

    /// <summary>상장주식수</summary>
    public long? ListedShares { get; private set; }

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

    private StockDailyPrice() { }

    public static StockDailyPrice Create(
        int stockID,
        DateOnly tradingDate,
        int open,
        int high,
        int low,
        int close,
        long volume,
        long tradingValue,
        int changeAmount,
        decimal changeRate,
        long? marketCap = null,
        long? listedShares = null
    ) {
        ArgumentOutOfRangeException.ThrowIfNegativeOrZero(stockID);

        return new StockDailyPrice
        {
            StockID = stockID,
            TradingDate = tradingDate,
            Open = open,
            High = high,
            Low = low,
            Close = close,
            Volume = volume,
            TradingValue = tradingValue,
            ChangeAmount = changeAmount,
            ChangeRate = changeRate,
            MarketCap = marketCap,
            ListedShares = listedShares
        };
    }

    /// <summary>동일 (StockID, TradingDate) 재수집 시 값 갱신 (upsert)</summary>
    public void Update(
        int open,
        int high,
        int low,
        int close,
        long volume,
        long tradingValue,
        int changeAmount,
        decimal changeRate,
        long? marketCap = null,
        long? listedShares = null
    ) {
        Open = open;
        High = high;
        Low = low;
        Close = close;
        Volume = volume;
        TradingValue = tradingValue;
        ChangeAmount = changeAmount;
        ChangeRate = changeRate;
        MarketCap = marketCap;
        ListedShares = listedShares;
    }
}