Bit_Wise_World/src/views/bitcoin/Calculator.vue

<template>
  <div class="calculator-page">
    <div class="nav-bar">
      <div class="nav-left" @click="$router.back()">
        <div>
          <VanIcon size="18" name="arrow-left"/>
        </div>
      </div>
      <div class="nav-title">计算器</div>
      <div class="nav-right"></div>
    </div>

    <div class="header-info">
      <div class="icon-wrapper">
        <vanIcon size="20" name="bars" />
      </div>
      <h2 class="pair-name">BTCUSDT 永续</h2>
    </div>

    <div class="tabs-wrapper">
      <div class="tabs-content pf600">
        <div
          v-for="(tab, index) in tabs"
          :key="index"
          class="tab-item"
          :class="{ active: currentTab === index }"
          @click="currentTab = index"
        >
          {{ tab }}
          <div class="active-bar" v-if="currentTab === index"></div>
        </div>
      </div>
    </div>

    <div v-if="currentTab === 2" class="mode-selectors">
      <div class="select-box">全仓 ▾</div>
      <div class="select-box">单向持仓</div>
    </div>

    <div class="trade-direction">
      <button
        class="dir-btn long"
        :class="{ active: direction === 'long' }"
        @click="direction = 'long'"
      >
        买入(做多)
      </button>
      <button
        class="dir-btn short"
        :class="{ active: direction === 'short' }"
        @click="direction = 'short'"
      >
        卖出(做空)
      </button>
    </div>

    <div v-if="currentTab === 5" class="funding-rate-display">
      <div class="rate-value">0.0030%</div>
      <div class="rate-label" @click="showModal=true">当前资金费率
        <VanIcon name="question-o" />
      </div>
    </div>

    <div v-if="currentTab !== 4 && currentTab !== 5" class="leverage-section">
      <div class="label">倍数</div>

      <div class="leverage-control">
        <button class="ctrl-btn" @click="stepLeverage(-1)">－</button>
        <div class="leverage-val">{{ leverage }}x</div>
        <button class="ctrl-btn" @click="stepLeverage(1)">＋</button>
      </div>

      <div class="slider-area">
        <LeverageSlider
          v-model="leverage"
          :marks="leverageMarks"
          :color="themeColor"
        />
      </div>

      <div class="leverage-tip">
        当前杠杆倍数最高可持有头寸 1,800,000,000 USDT
      </div>
    </div>

    <div class="form-group">
      <div v-if="currentTab !== 4 && currentTab !== 5" class="input-row">
        <div class="input-container">
          <span class="placeholder" v-show="!form.entryPrice">开仓价格</span>
          <input type="number" v-model="form.entryPrice" />
          <div class="suffix">USDT <span class="tag-latest">最新</span></div>
        </div>
      </div>

      <template v-if="currentTab === 0">
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.closePrice">平仓价格</span>
            <input type="number" v-model="form.closePrice" />
            <div class="suffix">USDT</div>
          </div>
        </div>
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.amount">成交数量</span>
            <input type="number" v-model="form.amount" />
            <div class="suffix">BTC</div>
          </div>
        </div>
      </template>

      <template v-if="currentTab === 1">
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.amount">成交数量</span>
            <input type="number" v-model="form.amount" />
            <div class="suffix">BTC</div>
          </div>
        </div>
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.pnl">预期收益额</span>
            <input type="number" v-model="form.pnl" />
            <div class="suffix">USDT</div>
          </div>
        </div>
      </template>

      <template v-if="currentTab === 2">
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.amount">开仓数量</span>
            <input type="number" v-model="form.amount" />
            <div class="suffix">BTC</div>
          </div>
        </div>
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.margin">保证金</span>
            <input type="number" v-model="form.margin" />
            <div class="suffix">USDT</div>
          </div>
        </div>
      </template>

      <template v-if="currentTab === 3">
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.balance">账户余额</span>
            <input type="number" v-model="form.balance" />
            <div class="suffix">USDT</div>
          </div>
        </div>
      </template>

      <template v-if="currentTab === 4">
        <div class="grid-header">
          <span>开仓价格(USDT)</span>
          <span>成交数量(BTC)</span>
        </div>
        <div class="dynamic-row" v-for="(item, idx) in avgPriceList" :key="idx">
          <div class="input-container half">
            <input type="number" v-model="item.price" placeholder="0.00" />
          </div>
          <div class="input-container half">
            <input type="number" v-model="item.amount" placeholder="0.00" />
          </div>
          <div style="display: flex; align-items: center;">
            <div class="remove-btn" @click="removeRow(idx)" v-if="avgPriceList.length > 1">
              <span>-</span>
            </div>
          </div>
        </div>
        <button class="add-position-btn" @click="addRow">增加仓位</button>
      </template>

      <template v-if="currentTab === 5">
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.entryPrice">标记价格</span>
            <input type="number" v-model="form.entryPrice" />
            <div class="suffix">USDT <span class="tag-latest">最新</span></div>
          </div>
        </div>
        <div class="input-row">
          <div class="input-container">
            <span class="placeholder" v-show="!form.amount">持仓数量</span>
            <input type="number" v-model="form.amount" />
            <div class="suffix">BTC</div>
          </div>
        </div>
      </template>
    </div>

    <div class="result-section">
      <h3>计算结果</h3>
      <p class="sub-text">实际市场存在变动，计算价格仅供参考</p>

      <div v-if="currentTab === 0">
        <div class="res-row"><span>保证金</span><span>{{ result.margin }} USDT</span></div>
        <div class="res-row"><span>收益</span><span :class="resultClass">{{ result.pnl }} USDT</span></div>
        <div class="res-row"><span>收益率</span><span :class="resultClass">{{ result.roe }}%</span></div>
      </div>

      <div v-if="currentTab === 1">
        <div class="res-row"><span>目标价格</span><span>-- USDT</span></div>
      </div>

      <div v-if="currentTab === 2">
        <div class="res-row"><span>强平价格</span><span>-- USDT</span></div>
      </div>

      <div v-if="currentTab === 3">
        <div class="res-row"><span>可开</span><span>-- USDT</span></div>
        <div class="res-row"><span>可开</span><span>-- BTC</span></div>
        <p class="small-tip">此计算最大可开数量时，将不考虑您的开仓损失</p>
      </div>

      <div v-if="currentTab === 4">
        <div class="res-row"><span>开仓均价</span><span>-- USDT</span></div>
      </div>

      <div v-if="currentTab === 5">
        <div class="res-row"><span>资金费用</span><span>-- USDT</span></div>
      </div>
    </div>

    <div class="footer-btns">
      <button class="btn-reset" @click="reset">重置</button>
      <button class="btn-calc" :style="{ background: themeColor }" @click="calculate">计算</button>
    </div>
    <div>
      <ProfitAndLossPrompt
          v-model:visible="showModal"
      ></ProfitAndLossPrompt>
    </div>
  </div>
</template>

<script setup>
import { Icon as VanIcon } from 'vant';
import {ref, computed, defineAsyncComponent} from 'vue';
// 请确保路径正确，指向刚才那个更新过的子组件
const LeverageSlider = defineAsyncComponent(()=>import('./calculator/LeverageSlider.vue'));
const ProfitAndLossPrompt = defineAsyncComponent(() => import('./calculator/FundingRateReminder.vue'));

//资金费率提示
const showModal = ref(false);


// 状态定义
const tabs = ['收益', '目标价格', '强平价格', '可开', '开仓均价', '资金费用'];
const currentTab = ref(0);
const direction = ref('long');
const leverage = ref(10); // 默认从 10x 开始

// ★ 固定阶梯数组 (10, 50, 100, 500, 1000)
const leverageMarks = [10, 50, 100, 500, 1000];

const form = ref({
  entryPrice: '',
  closePrice: '',
  amount: '',
  margin: '',
  balance: '',
  pnl: ''
});

const avgPriceList = ref([{ price: '', amount: '' }, { price: '', amount: '' }]);
const result = ref({ margin: '--', pnl: '--', roe: '--' });

// 计算属性
const themeColor = computed(() => direction.value === 'long' ? '#2ebd85' : '#f6465d');
const resultClass = computed(() => {
  if (parseFloat(result.value.pnl) > 0) return 'text-green';
  if (parseFloat(result.value.pnl) < 0) return 'text-red';
  return '';
});

// ★ 核心修改：步进式调整杠杆 (点击加减号时)
const stepLeverage = (dir) => {
  // 1. 找到当前值在数组中的索引
  let currentIndex = leverageMarks.indexOf(leverage.value);

  // 如果当前值不在数组里(比如手动改成了20)，就找一个最近的索引
  if (currentIndex === -1) {
    // 简单逻辑：默认归位到 0
    currentIndex = 0;
  }

  // 2. 计算下一个索引
  let nextIndex = currentIndex + dir;

  // 3. 边界限制
  if (nextIndex < 0) nextIndex = 0;
  if (nextIndex >= leverageMarks.length) nextIndex = leverageMarks.length - 1;

  // 4. 更新值
  leverage.value = leverageMarks[nextIndex];
};

// 简单计算逻辑 (Tab 0 收益)
const calculate = () => {
  if (currentTab.value === 0) {
    const entry = parseFloat(form.value.entryPrice);
    const close = parseFloat(form.value.closePrice);
    const amt = parseFloat(form.value.amount);
    const lev = leverage.value;

    if (entry && close && amt && lev) {
      const margin = (entry * amt) / lev;
      let pnl = 0;
      if (direction.value === 'long') {
        pnl = (close - entry) * amt;
      } else {
        pnl = (entry - close) * amt;
      }
      const roe = (pnl / margin) * 100;

      result.value = {
        margin: margin.toFixed(2),
        pnl: pnl.toFixed(2),
        roe: roe.toFixed(2)
      };
    }
  }
};

// 其他辅助函数
const addRow = () => avgPriceList.value.push({ price: '', amount: '' });
const removeRow = (idx) => avgPriceList.value.splice(idx, 1);
const reset = () => {
  form.value = { entryPrice: '', closePrice: '', amount: '', margin: '', balance: '', pnl: '' };
  result.value = { margin: '--', pnl: '--', roe: '--' };
  leverage.value = 10;
};
</script>

<style scoped>
* {
  box-sizing: border-box;
}

.calculator-page {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;
  background: #fff;
  min-height: 100vh;
  padding-bottom: 90px;
  color: #333;
  z-index: 200;
  position: fixed;       /* 固定定位 */
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
}

/* 导航 & 头部 */
.nav-bar { display: flex; justify-content: space-between; align-items: center;
  height: 44px; padding: 0 16px; }
.nav-left { font-size: 24px; cursor: pointer; }
.nav-title { font-size: 18px; font-weight: 600; }
.nav-right { width: 20px; }

.header-info {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  background-color: #fff;
  width: 100%;
}

.icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-bottom: 1px;
}

.pair-name {
  margin: 0;
  font-size: 18px;
  font-weight: bold;
  color: #333;
  line-height: 1;
}

/* Tabs */
.tabs-wrapper { overflow-x: auto; scrollbar-width: none; margin-bottom: 15px; }
.tabs-content { display: flex; justify-content: space-between; padding: 0 15px;
  border-bottom: 1px solid #f5f5f5; }
.tab-item { white-space: nowrap; padding: 12px 0; font-size: 14px; color: #999; position: relative;
  cursor: pointer; }
.tab-item.active { color: #111; font-weight: 600; }
.active-bar { position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 20px;
  height: 3px; background: #111; border-radius: 2px; }

/* 模式选择 */
.mode-selectors { display: flex; gap: 10px; padding: 0 16px; margin-bottom: 15px; }
.select-box { flex: 1; background: #f5f5f5; height: 36px; display: flex; align-items: center;
  padding: 0 12px; border-radius: 4px; font-size: 14px; color: #333; }

/* 做多做空 */
.trade-direction { display: flex; gap: 10px; padding: 0 16px; margin-bottom: 20px; }
.dir-btn { flex: 1; padding: 10px 0; border: none; border-radius: 4px; font-size: 14px;
  cursor: pointer; background: #f5f5f5; color: #999; transition: all 0.2s; }
.dir-btn.long.active { background: #2ebd85; color: #fff; font-weight: 600; }
.dir-btn.short.active { background: #f6465d; color: #fff; font-weight: 600; }

/* 资金费率 */
.funding-rate-display { text-align: center; padding: 20px 0; }
.rate-value { font-size: 32px; color: #666; font-weight: 500; }
.rate-label { font-size: 12px; color: #999; margin-top: 5px; }

/* 杠杆区域 */
.leverage-section { padding: 0 16px; margin-bottom: 20px; }
.label { font-size: 12px; color: #666; margin-bottom: 8px; }

/* 蓝色边框输入框 */
.leverage-control {
  display: flex;
  align-items: center;
  background: #f7f8fa;
  border-radius: 6px;
  height: 44px;
  margin-bottom: 10px;
  overflow: hidden;
}
.ctrl-btn {
  width: 50px;
  height: 100%;
  border: none;
  background: transparent;
  font-size: 22px;
  color: #999;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 4px;
}
.leverage-val {
  flex: 1;
  text-align: center;
  font-size: 16px;
  font-weight: 500;
  color: #333;
}
.slider-area { padding: 0 10px; }
.leverage-tip { font-size: 12px; color: #333; margin-top: 10px; }

/* 表单 */
.form-group { padding: 0 16px; }
.input-row { margin-bottom: 12px; }
.input-container { position: relative; display: flex; align-items: center; background: #f5f5f5;
  height: 44px; border-radius: 4px; padding: 0 12px; }
.placeholder { position: absolute; color: #bbb; font-size: 14px; pointer-events: none; }
.input-container input { flex: 1; border: none; background: transparent; outline: none;
  font-size: 14px; z-index: 1; height: 100%; width: 100%; }
.suffix { font-size: 14px; color: #666; margin-left: 8px; z-index: 2; white-space: nowrap; }
.tag-latest { color: #f6465d; margin-left: 4px; }

/* 表格布局 */
.grid-header { display: flex; font-size: 12px; color: #333; margin-bottom: 8px; }
.grid-header span { flex: 1; }
.dynamic-row { display: flex; gap: 10px; margin-bottom: 10px; align-items: center; }
.input-container.half { flex: 1; }
.remove-btn { width: 24px; height: 24px; border: 1px solid #f6465d; color: #f6465d;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 18px; cursor: pointer; margin-left: 5px; }
.remove-btn span { margin-bottom: 5px; }
.add-position-btn { width: 100%; height: 44px; background: #f6465d; color: white;
  border: none; border-radius: 22px; margin-top: 10px; font-size: 14px; }

/* 结果 */
.result-section { padding: 20px 16px; }
.result-section h3 { margin: 0 0 5px; font-size: 16px; font-weight: 600; }
.sub-text { font-size: 12px; color: #999; margin-bottom: 15px; }
.res-row { display: flex; justify-content: space-between; margin-bottom: 12px; font-size: 14px; }
.res-row span:first-child { color: #666; }
.res-row span:last-child { color: #333; font-weight: 500; }
.text-green { color: #2ebd85; }
.text-red { color: #f6465d; }
.small-tip { font-size: 12px; color: #999; margin-top: 5px; }

/* 底部按钮 */
.footer-btns { position: fixed; bottom: 0; left: 0; width: 100%; background: #fff;
  padding: 10px 16px 20px; display: flex; gap: 15px; box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
  box-sizing: border-box; z-index: 100; }
.btn-reset { flex: 1; height: 44px; border: none; background: #bbb; color: #fff;
  font-size: 16px; border-radius: 4px; }
.btn-calc { flex: 2; height: 44px; border: none; color: #fff; font-size: 16px;
  border-radius: 4px; font-weight: 600; transition: background 0.3s; }
</style>