[FIX] pos_coupon: remove the reward lines before recomputation of rewards

Task-id: 2631220
Part-of: odoo/odoo#77903

addons/pos_coupon/static/src/js/coupon.js

@@ -22,6 +22,7 @@ odoo.define('pos_coupon.pos', function (require) {
     const session = require('web.session');
     const concurrency = require('web.concurrency');
     const { Gui } = require('point_of_sale.Gui');
+    const { float_is_zero } = require('web.utils');
 
     const dp = new concurrency.DropPrevious();
 
@@ -258,7 +259,6 @@ odoo.define('pos_coupon.pos', function (require) {
                 () => {
                     if (!this.pos.config.use_coupon_programs) return;
                     dp.add(this._getNewRewardLines()).then(([newRewardLines, rewardsContainer]) => {
-                        this.orderlines.remove(this._getRewardLines());
                         this.orderlines.add(newRewardLines);
                         // We need this for the rendering of ActivePrograms component.
                         this.rewardsContainer = rewardsContainer;
@@ -427,6 +427,8 @@ odoo.define('pos_coupon.pos', function (require) {
          * @returns {[models.Orderline[], RewardsContainer]}
          */
         _getNewRewardLines: async function () {
+            // Remove the reward lines before recalculation of rewards.
+            this.orderlines.remove(this._getRewardLines());
             const rewardsContainer = await this._calculateRewards();
             // We set the programs that will generate coupons after validation of this order.
             // See `_postPushOrderResolve` in the `PaymentScreen`.
@@ -770,7 +772,12 @@ odoo.define('pos_coupon.pos', function (require) {
                     ? this.get_total_with_tax()
                     : this.get_total_without_tax();
             // TODO jcb rule_minimum_amount has to be converted.
-            if (!(amountToCheck >= program.rule_minimum_amount)) {
+            if (
+                !(
+                    amountToCheck > program.rule_minimum_amount ||
+                    float_is_zero(amountToCheck - program.rule_minimum_amount, this.pos.currency.decimals)
+                )
+            ) {
                 return {
                     successful: false,
                     reason: 'Minimum amount for this program is not satisfied.',