package simplex.bn25.makino335926.trading.position;

import java.math.BigDecimal;

// クラス: Position（各銘柄のポジションデータを保存）
public class Position {

    private final String ticker;          // 銘柄コード
    private final String name;            // 銘柄名
    private long quantity;                // 保有数量
    private BigDecimal averageUnitPrice;  // 平均取得単価
    private BigDecimal realizedPnL;       // 実現損益
    private BigDecimal valuation;         // 評価額
    private BigDecimal unrealizedPnL;     // 評価損益

    // コンストラクタ
    public Position(String ticker, String name) {
        this.ticker = ticker;
        this.name = name;
        this.quantity = 0;
        this.averageUnitPrice = BigDecimal.ZERO;
        this.realizedPnL = BigDecimal.ZERO;
        this.valuation = null;      // 時価情報が未設定の場合
        this.unrealizedPnL = null;
    }

    // GetterおよびSetter
    public String getTicker() {
        return ticker;
    }

    public String getName() {
        return name;
    }

    public long getQuantity() {
        return quantity;
    }

    public BigDecimal getAverageUnitPrice() {
        return averageUnitPrice;
    }

    public BigDecimal getRealizedPnL() {
        return realizedPnL;
    }

    public BigDecimal getValuation() {
        return valuation;
    }

    public BigDecimal getUnrealizedPnL() {
        return unrealizedPnL;
    }

    public void updateQuantity(long delta) {
        this.quantity += delta;
    }

    // メソッド:updateAverageUnitPrice(平均取得単価)
    public void updateAverageUnitPrice(BigDecimal newPrice, long deltaQuantity) {
        BigDecimal totalCost = this.averageUnitPrice.multiply(BigDecimal.valueOf(this.quantity)) 
                .add(newPrice.multiply(BigDecimal.valueOf(deltaQuantity)));                      
        this.quantity += deltaQuantity;
        if (this.quantity > 0) {
            this.averageUnitPrice = totalCost.divide(BigDecimal.valueOf(this.quantity), 2, BigDecimal.ROUND_HALF_UP);
        } else {
            this.averageUnitPrice = BigDecimal.ZERO;
        }
    }

    // メソッド:addRealizedPnL(実現損益)
    public void addRealizedPnL(BigDecimal amount) {
        this.realizedPnL = this.realizedPnL.add(amount);
    }

    // メソッド:setValuation(評価額)
    public void setValuation(BigDecimal marketPrice) {
        if (marketPrice != null) {
            this.valuation = marketPrice.multiply(BigDecimal.valueOf(this.quantity));
            this.unrealizedPnL = this.valuation.subtract(this.averageUnitPrice.multiply(BigDecimal.valueOf(this.quantity)));
        } else {
            this.valuation = null;
            this.unrealizedPnL = null;
        }
    }
}