package com.xcong.excoin.modules.okxNewPrice;
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import lombok.extern.slf4j.Slf4j;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* 网格价格队列构建器 — 从基底入场价生成双向价格队列和 OkxGridElement 列表。
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*
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* <h3>职责</h3>
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* <ul>
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* <li>根据基底空头入场价，向下递减排空仓队列</li>
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* <li>向上递增排多仓队列</li>
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* <li>整合两队列为 OkxGridElement 列表并注入 {@link OkxConfig}</li>
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* </ul>
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*
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* <h3>线程安全</h3>
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* 本类为纯函数式（除 config.setStep / config.setGridElements 副作用外），
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* 每次调用返回新构建的对象，不持有可变状态。
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*
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* @author Administrator
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*/
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@Slf4j
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public final class GridQueueBuilder {
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private GridQueueBuilder() { /* utility class */ }
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/**
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* 从基底入场价向下递减生成空仓价格队列，降序排列（大→小）。
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*
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* @param config 全局配置（step 会被计算并写入）
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* @param basePrice 空仓基底入场价
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* @return 空仓价格队列，按降序排列
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*/
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public static List<BigDecimal> buildShortQueue(OkxConfig config, BigDecimal basePrice) {
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int prec = config.getPriceScale();
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BigDecimal step = basePrice.multiply(config.getGridRate()).setScale(prec, RoundingMode.HALF_UP);
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config.setStep(step); // 其它方法依赖此 step
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List<BigDecimal> queue = new ArrayList<>();
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BigDecimal elem = basePrice.subtract(step).setScale(prec, RoundingMode.HALF_UP);
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for (int i = 0; i < config.getGridQueueSize(); i++) {
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queue.add(elem);
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elem = elem.subtract(step).setScale(prec, RoundingMode.HALF_UP);
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if (elem.compareTo(BigDecimal.ZERO) <= 0) break;
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}
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queue.sort((a, b) -> b.compareTo(a)); // 降序
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log.info("[OKX] 空队列:{}", queue);
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return queue;
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}
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/**
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* 从基底入场价向上递增生成多仓价格队列，升序排列（小→大）。
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*
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* @param config 全局配置（使用已设置的 step）
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* @param basePrice 空仓基底入场价（对齐 Gate 版本，多仓队列也以此为基准）
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* @return 多仓价格队列，按升序排列
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*/
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public static List<BigDecimal> buildLongQueue(OkxConfig config, BigDecimal basePrice) {
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int prec = config.getPriceScale();
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BigDecimal step = config.getStep();
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List<BigDecimal> queue = new ArrayList<>();
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BigDecimal elem = basePrice.add(step).setScale(prec, RoundingMode.HALF_UP);
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for (int i = 0; i < config.getGridQueueSize(); i++) {
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queue.add(elem);
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elem = elem.add(step).setScale(prec, RoundingMode.HALF_UP);
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}
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queue.sort(BigDecimal::compareTo); // 升序
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log.info("[OKX] 多队列:{}", queue);
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return queue;
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}
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/**
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* 将空/多仓队列整合为 OkxGridElement 列表。
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* <ul>
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* <li>空仓网格: id = -1, -2, -3 …</li>
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* <li>基底网格: id = 0（短仓入场价位置）</li>
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* <li>多仓网格: id = +1, +2, +3 …</li>
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* </ul>
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* 每个网格元素包含两个方向的 {@link OkxTraderParam}（入场价 / 止盈价 / 数量）。
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*
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* @param config 全局配置
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* @param shortQueue 空仓价格队列
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* @param longQueue 多仓价格队列
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* @param basePrice 空仓基底入场价
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* @return 构建好的网格元素列表（已注入 config）
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*/
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public static List<OkxGridElement> buildGridElements(OkxConfig config,
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List<BigDecimal> shortQueue,
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List<BigDecimal> longQueue,
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BigDecimal basePrice) {
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List<OkxGridElement> elements = new ArrayList<>();
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int shortSize = shortQueue.size();
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int longSize = longQueue.size();
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int prec = config.getPriceScale();
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BigDecimal step = config.getStep();
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String qty = config.getQuantity();
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// ---- 空仓网格: id = -1, -2, … ----
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for (int i = 0; i < shortSize; i++) {
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int id = -(i + 1);
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Integer upId = (i == 0) ? 0 : id + 1;
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Integer downId = (i == shortSize - 1) ? null : id - 1;
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BigDecimal price = shortQueue.get(i);
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OkxTraderParam longParam = OkxTraderParam.builder()
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.direction(OkxTraderParam.Direction.LONG)
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.entryPrice(price).takeProfitPrice(price.add(step).setScale(prec, RoundingMode.HALF_UP)).quantity(qty).build();
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OkxTraderParam shortParam = OkxTraderParam.builder()
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.direction(OkxTraderParam.Direction.SHORT)
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.entryPrice(price).takeProfitPrice(price.subtract(step).setScale(prec, RoundingMode.HALF_UP)).quantity(qty).build();
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elements.add(OkxGridElement.builder().id(id).gridPrice(price).upId(upId).downId(downId)
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.longTraderParam(longParam).shortTraderParam(shortParam).build());
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}
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// ---- 基底网格: id = 0 ----
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{
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BigDecimal price = basePrice;
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OkxTraderParam longParam = OkxTraderParam.builder()
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.direction(OkxTraderParam.Direction.LONG)
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.entryPrice(price).takeProfitPrice(price.add(step).setScale(prec, RoundingMode.HALF_UP)).quantity(qty).build();
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OkxTraderParam shortParam = OkxTraderParam.builder()
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.direction(OkxTraderParam.Direction.SHORT)
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.entryPrice(price).takeProfitPrice(price.subtract(step).setScale(prec, RoundingMode.HALF_UP)).quantity(qty).build();
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elements.add(OkxGridElement.builder().id(0).gridPrice(price)
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.upId(shortSize > 0 ? 1 : null).downId(longSize > 0 ? -1 : null)
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.longTraderParam(longParam).shortTraderParam(shortParam).build());
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}
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// ---- 多仓网格: id = 1, 2, … ----
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for (int i = 0; i < longSize; i++) {
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int id = i + 1;
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Integer downId = (i == 0) ? 0 : id - 1;
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Integer upId = (i == longSize - 1) ? null : id + 1;
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BigDecimal price = longQueue.get(i);
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OkxTraderParam longParam = OkxTraderParam.builder()
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.direction(OkxTraderParam.Direction.LONG)
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.entryPrice(price).takeProfitPrice(price.add(step).setScale(prec, RoundingMode.HALF_UP)).quantity(qty).build();
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OkxTraderParam shortParam = OkxTraderParam.builder()
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.direction(OkxTraderParam.Direction.SHORT)
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.entryPrice(price).takeProfitPrice(price.subtract(step).setScale(prec, RoundingMode.HALF_UP)).quantity(qty).build();
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elements.add(OkxGridElement.builder().id(id).gridPrice(price).upId(upId).downId(downId)
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.longTraderParam(longParam).shortTraderParam(shortParam).build());
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}
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config.setGridElements(elements);
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log.info("[OKX] 网格元素列表已构建, 共{}个元素", elements.size());
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return elements;
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}
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}
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