新增商品关联商品静态部分

src/views/tool/Instead/components/order.vue

@@ -13,7 +13,7 @@
             </p>
             <p class="u-font-14 color-666 u-m-t-10">
               <span class="money">余额：{{ carts.vipUser.amount }}</span>
-              <span class="score u-m-l-10">积分：{{ carts.vipUser.accountPoints }}</span>
+              <span class="score u-m-l-10">积分：{{ carts.vipUser.pointBalance }}</span>
             </p>
           </div>
         </div>
@@ -46,7 +46,8 @@
               </el-radio-group>
               <el-input-number class="u-m-l-10" v-if="score.sel != -1" v-model="usePointsNumber" step-strictly
                 :step="pointsRes.equivalentPoints" placeholder="请输入积分抵扣数量" :min="pointsRes.minDeductionPoints"
-                :max="pointsRes.maxUsablePoints" @change="pointsToMoney"></el-input-number>
+                :max="pointsRes.maxUsablePoints" :disabled="!pointsRes.usable"
+                @change="pointsToMoney"></el-input-number>
             </div>
             <p class="u-font-14 color-666 u-m-t-10" v-if="pointsRes.unusableReason && !pointsRes.usable">
               <span class="color-red">*</span>
@@ -398,8 +399,16 @@ watch(
 );
 
 //002-获取订单可用积分及抵扣金额（支付页面使用）
-const pointsRes = ref({ usable: true, maxUsablePoints: 0, minDeductionPoints: 0 });
-const usePointsNumber = ref(0);
+const pointsRes = ref({
+  usable: false,
+  equivalentPoints: 0, // 积分换算比例 eg: 20 积分 = 1 元
+  maxDeductionRatio: 0, // 下单最高抵扣比例（小数）
+  minPaymentAmount: 0, // 下单实付抵扣门槛（元）
+  maxUsablePoints: 0,
+  minDeductionPoints: 0,
+  unusableReason: "",
+});
+const usePointsNumber = ref(0); // 输入的积分数量（用户填写）
 //积分可抵扣最大金额
 const scoreMaxMoney = computed(() => {
   return (
@@ -423,24 +432,127 @@ async function pointsInit() {
   }
   const { pointsConfig, pointsUser } = await PointsApi.calcOrderUsablePoints({
     shopUserId: carts.vipUser.id,
-    // orderAmount: scoreMaxMoney.value,
   });
 
-  const res = pointsConfig
-  carts.vipUser.accountPoints = pointsUser.id ? pointsUser.pointBalance : 0;
+  // 不修改 accountPoints（为余额），将积分保存到 pointBalance 字段
+  carts.vipUser.pointBalance = pointsUser && pointsUser.id ? pointsUser.pointBalance : 0;
+
+  // 保险取值
+  const eq = pointsConfig?.equivalentPoints || 0;
+  const maxRatio = pointsConfig?.maxDeductionRatio || 0;
+  const minPay = pointsConfig?.minPaymentAmount || 0;
+
+  // 计算当前订单可抵扣金额上限（元）
+  let finalPay = Number(carts.orderCostSummary.finalPayAmount) || 0;
+
+  const res = {
+    usable: true,
+    equivalentPoints: eq,
+    maxDeductionRatio: maxRatio,
+    minPaymentAmount: minPay,
+    maxUsablePoints: 0,
+    minDeductionPoints: pointsConfig?.minDeductionPoints || eq,
+    unusableReason: "",
+  };
+
+  // 如果订单实付低于最小使用门槛，则不可用
+  if (finalPay <= 0 || (minPay > 0 && finalPay < minPay)) {
+    res.usable = false;
+    res.unusableReason = `订单实付金额低于 ${minPay} 元，无法使用积分抵扣`;
+  } else if (eq <= 0) {
+    res.usable = false;
+    res.unusableReason = `积分换算比例配置错误，无法使用积分抵扣`;
+  } else {
+    // 计算基于比例限制的最大抵扣金额（元）
+    let maxByRatio = finalPay * maxRatio;
+    // 保证抵扣后剩余金额 >= minPaymentAmount
+    if (minPay > 0) {
+      const allowed = finalPay - minPay;
+      if (allowed <= 0) {
+        res.usable = false;
+        res.unusableReason = `抵扣后实付金额必须大于等于 ${minPay} 元，当前不可使用积分`;
+      } else {
+        maxByRatio = Math.min(maxByRatio, allowed);
+      }
+    }
+
+    if (res.usable) {
+      // 可用积分上限（向下取整为 eq 的倍数）
+      const maxByMoney = Math.floor(maxByRatio * eq);
+      const userPoints = carts.vipUser.pointBalance || 0;
+      res.maxUsablePoints = Math.min(userPoints, maxByMoney);
+      // 最小抵扣积分为配置值或等于换算比
+      res.minDeductionPoints = pointsConfig?.minDeductionPoints || eq;
+      if (res.maxUsablePoints < res.minDeductionPoints) {
+        res.usable = false;
+        res.unusableReason = `可用积分不足，至少需要 ${res.minDeductionPoints} 积分才可抵扣`;
+      }
+    }
+  }
 
   pointsRes.value = res;
   carts.pointDeductionRule.pointsPerYuan = res.equivalentPoints;
+
   if (score.sel == -1) {
+    // 未选择使用积分
+    return res;
+  }
+
+  // 如果可用则默认填充可用最大值，否则清零
+  usePointsNumber.value = res.usable ? res.maxUsablePoints : 0;
+  if (!res.usable) score.sel = -1;
+
+  return res;
+}
+
+// 将输入的积分数转换为抵扣金额并写回 carts.orderCostSummary
+function pointsToMoney(val) {
+  const cfg = pointsRes.value;
+  if (!cfg.usable || cfg.equivalentPoints <= 0) {
+    usePointsNumber.value = 0;
+    carts.orderCostSummary.pointUsed = 0;
+    carts.orderCostSummary.pointDeductionAmount = 0;
     return;
   }
 
-  usePointsNumber.value = res.usable ? res.maxUsablePoints : 0;
-  if (res.usable) {
-  } else {
-    score.sel = -1;
+  // 确保为整数积分
+  let pts = parseInt(usePointsNumber.value || 0, 10);
+  if (isNaN(pts) || pts <= 0) {
+    pts = 0;
   }
-  return res;
+
+  // 限制最大值
+  if (cfg.maxUsablePoints && pts > cfg.maxUsablePoints) {
+    pts = cfg.maxUsablePoints;
+  }
+
+  // 计算抵扣金额（元），向下保留两位
+  const money = new BigNumber(pts).div(cfg.equivalentPoints).decimalPlaces(2, BigNumber.ROUND_DOWN).toNumber();
+
+  // 再次校验不超过允许的最大抵扣金额（基于比例或门槛）
+  let finalPay = Number(carts.orderCostSummary.finalPayAmount) || 0;
+  let maxByRatio = finalPay * cfg.maxDeductionRatio;
+  if (cfg.minPaymentAmount > 0) {
+    const allowed = finalPay - cfg.minPaymentAmount;
+    if (allowed <= 0) {
+      usePointsNumber.value = 0;
+      carts.orderCostSummary.pointUsed = 0;
+      carts.orderCostSummary.pointDeductionAmount = 0;
+      return;
+    }
+    maxByRatio = Math.min(maxByRatio, allowed);
+  }
+  const maxAllowedMoney = new BigNumber(maxByRatio).decimalPlaces(2, BigNumber.ROUND_DOWN).toNumber();
+  if (money > maxAllowedMoney) {
+    // 调整积分到允许的最大金额对应的积分
+    const allowedPts = Math.floor(maxAllowedMoney * cfg.equivalentPoints);
+    pts = Math.min(allowedPts, cfg.maxUsablePoints);
+  }
+
+  usePointsNumber.value = pts;
+  const finalMoney = new BigNumber(pts).div(cfg.equivalentPoints).decimalPlaces(2, BigNumber.ROUND_DOWN).toNumber();
+  carts.orderCostSummary.pointUsed = pts;
+  carts.orderCostSummary.pointDeductionAmount = finalMoney;
 }
 
 const emits = defineEmits(["chooseUser", "paysuccess"]);