From f2a5dc4ca371b8080e1d3ae651e92c6218e1d560 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Antoni=20Nu=C3=B1ez=20Romeu?= <antoni.nunez@ficosa.com>
Date: Mon, 13 Jul 2026 15:18:20 +0200
Subject: [PATCH] feat(backend): add CIMA OTC search function with Redis
 caching

---
 apps/backend/cima-service.js | 80 ++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/apps/backend/cima-service.js b/apps/backend/cima-service.js
index ad185fd..76364ac 100644
--- a/apps/backend/cima-service.js
+++ b/apps/backend/cima-service.js
@@ -231,6 +231,86 @@ export async function getMedicineDetails(nregistro) {
   }
 }
 
+/**
+ * Busca medicamentos OTC (Sin Receta) en la API de CIMA con caché de Redis
+ * @param {string} query - Término de búsqueda
+ * @returns {Promise<Array>} - Lista de medicamentos OTC encontrados
+ */
+export async function searchOTC(query) {
+  if (!query || query.trim().length < 2) {
+    return [];
+  }
+
+  const searchTerm = query.trim().toLowerCase();
+  const cacheKey = `cima:otc:${searchTerm}`;
+
+  try {
+    // Intentar obtener del caché
+    const cachedData = await redisClient.get(cacheKey);
+    
+    if (cachedData) {
+      console.log(`📦 Cache hit for OTC search: ${searchTerm}`);
+      return JSON.parse(cachedData);
+    }
+
+    const parsed = parseSearchQuery(searchTerm);
+    const apiSearchTerm = parsed.nameQuery || searchTerm;
+
+    console.log(`🌐 Fetching OTC from CIMA API: ${apiSearchTerm}`);
+    const response = await axios.get(`${CIMA_API_BASE_URL}/medicamentos`, {
+      params: {
+        nombre: apiSearchTerm,
+        cpresc: 'Sin Receta'
+      },
+      timeout: 5000
+    });
+
+    if (response.data && response.data.resultados) {
+      // Transformar los datos de CIMA al modelo unificado Product
+      const medicines = response.data.resultados.map(med => ({
+        id: med.nregistro,
+        source: 'cima',
+        name: med.nombre,
+        brand: med.labtitular || '',
+        category: 'otc',
+        image_url: med.fotos?.[0]?.url || null,
+        active_ingredient: med.vtm?.nombre || null,
+        dosage: med.dosis || null,
+        form: med.formaFarmaceutica?.nombre || null,
+        prescription: med.cpresc,
+        commercialized: med.comerc,
+        photos: med.fotos || [],
+        docs: med.docs || []
+      }));
+
+      const filtered = filterMedicinesByFullQuery(medicines, searchTerm);
+
+      // Guardar en caché (1h TTL)
+      await redisClient.setEx(cacheKey, CACHE_TTL, JSON.stringify(filtered));
+      
+      console.log(`✅ Cached ${filtered.length} OTC medicines for: ${searchTerm}`);
+      return filtered;
+    }
+
+    return [];
+  } catch (error) {
+    console.error('Error searching OTC medicines from CIMA:', error.message);
+    
+    // Si falla, intentar devolver datos cacheados aunque hayan expirado
+    try {
+      const staleData = await redisClient.get(cacheKey);
+      if (staleData) {
+        console.log('⚠️ Returning stale OTC cache data due to API error');
+        return JSON.parse(staleData);
+      }
+    } catch (cacheError) {
+      console.error('OTC cache fallback also failed:', cacheError);
+    }
+    
+    return [];
+  }
+}
+
 /**
  * Limpia el caché de búsquedas (útil para testing o mantenimiento)
  * @param {string} pattern - Patrón de claves a eliminar (ej: 'medicines:search:*')