accumulate stock deltas before campaigns

backend/services/campaignService.js

@@ -3,6 +3,7 @@ const { N8N_WHATSAPP_TRIGGER_URL } = require('../config');
 
 const TOP_BUYERS_LIMIT = 100;
 const MAX_CAMPAIGN_ATTEMPTS = 3;
+const CAMPAIGN_DELTA_THRESHOLD = 100;
 
 const enqueueStockCampaignItem = async (client, item) => {
     const query = `
@@ -38,28 +39,38 @@ const getTopBuyersAllTime = async () => {
     return result.rows;
 };
 
-const claimPendingCampaignItems = async () => {
+const claimReadyCampaignItems = async () => {
     const client = await pool.connect();
 
     try {
         await client.query('BEGIN');
 
         const result = await client.query(`
+            WITH ready_groups AS (
+                SELECT base_product_name
+                FROM stock_campaign_queue
+                WHERE status IN ('pending', 'failed')
+                  AND attempts < $1
+                GROUP BY base_product_name
+                HAVING SUM(delta_estoque) >= $2
+            ),
+            ready_items AS (
+                SELECT queue.id
+                FROM stock_campaign_queue queue
+                JOIN ready_groups ON ready_groups.base_product_name = queue.base_product_name
+                WHERE queue.status IN ('pending', 'failed')
+                  AND queue.attempts < $1
+                ORDER BY queue.created_at ASC
+                FOR UPDATE OF queue SKIP LOCKED
+            )
             UPDATE stock_campaign_queue
             SET status = 'processing',
                 attempts = attempts + 1,
                 updated_at = CURRENT_TIMESTAMP,
                 last_error = NULL
-            WHERE id IN (
-                SELECT id
-                FROM stock_campaign_queue
-                WHERE status IN ('pending', 'failed')
-                  AND attempts < $1
-                ORDER BY created_at ASC
-                FOR UPDATE SKIP LOCKED
-            )
+            WHERE id IN (SELECT id FROM ready_items)
             RETURNING *;
-        `, [MAX_CAMPAIGN_ATTEMPTS]);
+        `, [MAX_CAMPAIGN_ATTEMPTS, CAMPAIGN_DELTA_THRESHOLD]);
 
         await client.query('COMMIT');
         return result.rows;
@@ -71,12 +82,28 @@ const claimPendingCampaignItems = async () => {
     }
 };
 
+const countPendingBelowThresholdGroups = async () => {
+    const result = await pool.query(`
+        SELECT COUNT(*)::int as count
+        FROM (
+            SELECT base_product_name
+            FROM stock_campaign_queue
+            WHERE status IN ('pending', 'failed')
+              AND attempts < $1
+            GROUP BY base_product_name
+            HAVING SUM(delta_estoque) < $2
+        ) below_threshold_groups;
+    `, [MAX_CAMPAIGN_ATTEMPTS, CAMPAIGN_DELTA_THRESHOLD]);
+
+    return result.rows[0]?.count || 0;
+};
+
 const updateCampaignItemsStatus = async (ids, status, errorMessage = null) => {
     if (!ids.length) return;
 
     await pool.query(`
         UPDATE stock_campaign_queue
-        SET status = $1,
+        SET status = $1::varchar,
             last_error = $2,
             updated_at = CURRENT_TIMESTAMP,
             sent_at = CASE WHEN $1 = 'sent' THEN CURRENT_TIMESTAMP ELSE sent_at END
@@ -109,12 +136,13 @@ const sendWhatsappCampaign = async (baseProductName, items, customers) => {
 };
 
 const processPendingStockCampaigns = async () => {
-    const rows = await claimPendingCampaignItems();
+    const rows = await claimReadyCampaignItems();
     const summary = {
         claimed: rows.length,
         sentGroups: 0,
         skippedGroups: 0,
-        failedGroups: 0
+        failedGroups: 0,
+        pendingBelowThresholdGroups: await countPendingBelowThresholdGroups()
     };
 
     if (!rows.length) {