Add client purchase pattern analytics

backend/services/analyticsService.js

@@ -942,6 +942,58 @@ const getClientFilterOptions = async () => {
     };
 };
 
+const getClientPurchasePatternAnalytics = async () => {
+    const result = await pool.query(`
+        ${CUSTOMER_IDENTITY_CTE},
+        order_events AS (
+            SELECT DISTINCT ON (
+                ${CUSTOMER_KEY_SQL},
+                COALESCE(NULLIF(pedido_id, ''), data_pedido || '_' || valor_pedido::text)
+            )
+                data_pedido_date,
+                created_at
+            FROM identity_orders
+            WHERE data_pedido_date IS NOT NULL
+            ORDER BY
+                ${CUSTOMER_KEY_SQL},
+                COALESCE(NULLIF(pedido_id, ''), data_pedido || '_' || valor_pedido::text),
+                created_at ASC NULLS LAST
+        )
+        SELECT
+            EXTRACT(DOW FROM data_pedido_date)::int as weekday,
+            EXTRACT(HOUR FROM created_at AT TIME ZONE 'America/Sao_Paulo')::int as hour,
+            COUNT(*)::int as order_count
+        FROM order_events
+        GROUP BY weekday, hour
+        ORDER BY weekday ASC, hour ASC;
+    `);
+
+    const purchaseWeekdays = WEEKDAY_LABELS.map(label => ({ label, value: 0 }));
+    const purchaseHours = Array.from({ length: 24 }, (_, hour) => ({
+        label: `${String(hour).padStart(2, '0')}h`,
+        value: 0
+    }));
+
+    result.rows.forEach(row => {
+        const weekday = row.weekday === null || row.weekday === undefined ? null : Number(row.weekday);
+        const hour = row.hour === null || row.hour === undefined ? null : Number(row.hour);
+        const orderCount = toNumber(row.order_count);
+
+        if (weekday !== null && Number.isInteger(weekday) && purchaseWeekdays[weekday]) {
+            purchaseWeekdays[weekday].value += orderCount;
+        }
+
+        if (hour !== null && Number.isInteger(hour) && purchaseHours[hour]) {
+            purchaseHours[hour].value += orderCount;
+        }
+    });
+
+    return {
+        purchaseWeekdays,
+        purchaseHours
+    };
+};
+
 const getOrderGroupKey = (row) => (
     row.pedido_id ||
     `${row.data_pedido || getDateOnly(row.data_pedido_date) || ''}_${row.valor_pedido || 0}`
@@ -1353,6 +1405,7 @@ module.exports = {
     getFrequencyScore,
     getClientDetailsAnalytics,
     getClientFilterOptions,
+    getClientPurchasePatternAnalytics,
     getPreviousDate,
     getRecencyScore,
     getRfmAnalytics,