Optimize product detail analytics loading

backend/services/analyticsService.js

@@ -452,6 +452,98 @@ const getProductAnalytics = async (range = {}) => {
     }));
 };
 
+const getProductDetailsAnalytics = async (productId, range = {}) => {
+    const normalizedProductId = String(productId || '').trim();
+    if (!normalizedProductId) return null;
+
+    const normalizedStart = normalizeDateParam(range.start);
+    const normalizedEnd = normalizeDateParam(range.end);
+    const periodParams = [normalizedProductId];
+    const periodFilters = [
+        'produto_id = $1',
+        'data_pedido_date IS NOT NULL'
+    ];
+
+    if (normalizedStart) {
+        periodParams.push(normalizedStart);
+        periodFilters.push(`data_pedido_date >= $${periodParams.length}::date`);
+    }
+
+    if (normalizedEnd) {
+        periodParams.push(normalizedEnd);
+        periodFilters.push(`data_pedido_date <= $${periodParams.length}::date`);
+    }
+
+    const [summaryResult, periodResult] = await Promise.all([
+        pool.query(`
+            WITH selected_product AS (
+                SELECT $1::text as id
+            ),
+            stock_info AS (
+                SELECT
+                    produto_id as id,
+                    MAX(NULLIF(nome, '')) as name
+                FROM stock
+                WHERE produto_id = $1
+                GROUP BY produto_id
+            ),
+            order_info AS (
+                SELECT
+                    produto_id as id,
+                    (ARRAY_AGG(COALESCE(NULLIF(produto_descricao, ''), 'Unknown') ORDER BY data_pedido_date DESC NULLS LAST, data_pedido DESC NULLS LAST))[1] as name,
+                    (ARRAY_AGG(valor_unitario ORDER BY data_pedido_date DESC NULLS LAST, data_pedido DESC NULLS LAST))[1] as price
+                FROM orders
+                WHERE produto_id = $1
+                GROUP BY produto_id
+            )
+            SELECT
+                selected_product.id,
+                COALESCE(stock_info.name, order_info.name, 'Unknown') as name,
+                COALESCE(order_info.price, 0) as price
+            FROM selected_product
+            LEFT JOIN stock_info ON stock_info.id = selected_product.id
+            LEFT JOIN order_info ON order_info.id = selected_product.id
+            WHERE stock_info.id IS NOT NULL OR order_info.id IS NOT NULL;
+        `, [normalizedProductId]),
+        pool.query(`
+            SELECT
+                data_pedido_date,
+                MAX(data_pedido) as date_label,
+                COALESCE(SUM(quantidade), 0) as quantity_sold,
+                COALESCE(SUM(quantidade * valor_unitario), 0) as revenue
+            FROM orders
+            WHERE ${periodFilters.join(' AND ')}
+            GROUP BY data_pedido_date
+            ORDER BY data_pedido_date ASC;
+        `, periodParams)
+    ]);
+
+    const summary = summaryResult.rows[0];
+    if (!summary) return null;
+
+    const chartData = periodResult.rows.map(row => ({
+        date: row.date_label || getDateOnly(row.data_pedido_date) || '',
+        value: toNumber(row.quantity_sold)
+    }));
+    const totalSold = periodResult.rows.reduce((sum, row) => sum + toNumber(row.quantity_sold), 0);
+    const totalRevenue = periodResult.rows.reduce((sum, row) => sum + toNumber(row.revenue), 0);
+
+    return {
+        range: {
+            start: normalizedStart,
+            end: normalizedEnd
+        },
+        productInfo: {
+            id: summary.id,
+            name: summary.name,
+            price: toNumber(summary.price)
+        },
+        chartData,
+        totalSold,
+        totalRevenue
+    };
+};
+
 const getClientAnalytics = async (range = {}) => {
     const { params, whereClause } = buildDateFilter(range);
     const result = await pool.query(`
@@ -837,6 +929,7 @@ module.exports = {
     getRfmSegment,
     getClientAnalytics,
     getDashboardAnalytics,
+    getProductDetailsAnalytics,
     getProductAnalytics,
     normalizeDateParam,
     scoreTertile