From 1b8ab9fecfe59aa390da59339f1b53912015d988 Mon Sep 17 00:00:00 2001
From: Marco Gallegos <marco.gallegos@outlook.com>
Date: Sun, 18 Jan 2026 09:31:50 -0600
Subject: [PATCH] docs: Document all Supabase connection fixes and API
 improvements

- Update README with Node.js 20 requirement and recent fixes
- Enhance API documentation with improved endpoints and troubleshooting
- Add Supabase connection issue resolution to troubleshooting guide
- Document lazy client initialization and enhanced error diagnostics
- Include recent improvements section in README
---
 README.md               | 21 ++++++++++++-------
 docs/API.md             | 46 ++++++++++++++++++++++++++++++++++++++---
 docs/TROUBLESHOOTING.md |  8 +++++++
 3 files changed, 65 insertions(+), 10 deletions(-)

diff --git a/README.md b/README.md
index f9e9ba4..38ca438 100644
--- a/README.md
+++ b/README.md
@@ -189,11 +189,11 @@ El PRD es la fuente de verdad funcional. El README es la guía de ejecución.
 
 ## 7. Requisitos de Entorno
 
-* Node.js 18+
-* Cuenta Supabase
-* Cuenta Stripe
-* Proyecto Google Cloud (Calendar API)
-* Credenciales WhatsApp API
+ * Node.js 20+ (actualizado para compatibilidad con Supabase)
+ * Cuenta Supabase
+ * Cuenta Stripe
+ * Proyecto Google Cloud (Calendar API)
+ * Credenciales WhatsApp API
 
 Variables de entorno obligatorias:
 
@@ -327,9 +327,16 @@ El sitio estará disponible en **http://localhost:2311**
 - ⏳ Recibos digitales por email
 - ⏳ Landing page para believers (booking público)
 - ⏳ Tests unitarios
-- ⏳ Archivos SEO (robots.txt, sitemap.xml)
+ - ⏳ Archivos SEO (robots.txt, sitemap.xml)
 
-### Fase Actual
+ ### Correcciones Recientes ✅ (Enero 2026)
+ - ✅ **Cliente Supabase Mejorado**: Inicialización lazy con validación de variables de entorno
+ - ✅ **APIs con Diagnóstico Avanzado**: Logging detallado en `/api/services` y `/api/locations`
+ - ✅ **Compatibilidad Node.js**: Actualización a Node 20 para compatibilidad con Supabase
+ - ✅ **Solución "fetch failed"**: Corrección del error de conectividad con Supabase en producción
+ - ✅ **Dockerfile Optimizado**: Imagen de producción con Node 20 y configuraciones mejoradas
+
+ ### Fase Actual
 **Fase 1 — Cimientos y CRM**: 100% completado
 - Infraestructura base: 100%
 - Esquema de base de datos: 100%
diff --git a/docs/API.md b/docs/API.md
index 4aa25dc..0c3990f 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -13,11 +13,12 @@ AnchorOS is a comprehensive salon management system built with Next.js, Supabase
 ### Public APIs
 
 #### Services
-- `GET /api/services` - List all available services
+- `GET /api/services` - List all available services (with detailed logging and error diagnostics)
+- `GET /api/services?location_id={id}` - Filter services by location
 - `POST /api/services` - Create new service (Admin only)
 
 #### Locations
-- `GET /api/locations` - List all salon locations
+- `GET /api/locations` - List all salon locations (with detailed logging and error diagnostics)
 
 #### Availability
 - `GET /api/availability/time-slots` - Get available time slots for booking
@@ -142,7 +143,7 @@ Default business hours (updated via migration):
 ## Deployment
 
 ### Prerequisites
-- Node.js 18+
+- Node.js 20+ (updated for Supabase compatibility)
 - Supabase account
 - Stripe account
 - Google Cloud (for Calendar)
@@ -193,6 +194,45 @@ Default business hours (updated via migration):
 - Magic link authentication for customers
 - Encrypted payment processing
 
+## Recent Improvements (January 2026)
+
+### Supabase Connection Fixes
+- **Lazy Client Initialization**: Supabase client now initializes only when needed, ensuring environment variables are available at runtime
+- **Enhanced Error Diagnostics**: APIs now provide detailed logging for connection issues
+- **Node.js 20 Compatibility**: Updated runtime for better Supabase SDK compatibility
+- **Connection Testing**: APIs test Supabase connectivity before executing queries
+
+### API Enhancements
+- **Detailed Logging**: Services and Locations APIs now log connection status, query results, and errors
+- **Better Error Messages**: Failed requests return structured error information with timestamps
+- **Connectivity Validation**: Pre-flight checks ensure Supabase is reachable before processing requests
+
+### Troubleshooting
+If APIs return `"TypeError: fetch failed"`:
+1. Verify Supabase environment variables are correctly set in deployment platform
+2. Check Supabase service status and connectivity
+3. Review deployment logs for initialization errors
+4. Ensure Node.js 20+ is being used
+
+### Example Error Response
+```json
+{
+  "error": "TypeError: fetch failed",
+  "details": "Failed to connect to Supabase",
+  "timestamp": "2026-01-18T15:00:00.000Z"
+}
+```
+
+### Example Success Response
+```json
+{
+  "success": true,
+  "services": [...],
+  "count": 22,
+  "timestamp": "2026-01-18T15:00:00.000Z"
+}
+```
+
 ## Support
 
 For API issues or feature requests, please check the TASKS.md for current priorities or create an issue in the repository.
\ No newline at end of file
diff --git a/docs/TROUBLESHOOTING.md b/docs/TROUBLESHOOTING.md
index d36111a..f0bee56 100644
--- a/docs/TROUBLESHOOTING.md
+++ b/docs/TROUBLESHOOTING.md
@@ -20,6 +20,14 @@ Esta guía ayuda a resolver problemas comunes durante el setup y desarrollo de A
   - Verificar políticas en Supabase Dashboard > Authentication > Policies
   - Para kioskos: asegurar API key válida en headers `x-kiosk-api-key`
 
+#### Error: "TypeError: fetch failed" (Resuelto Enero 2026)
+- **Causa**: Cliente Supabase se inicializa antes de que las variables de entorno estén disponibles en runtime
+- **Solución**:
+  - Cliente ahora usa inicialización lazy (solo cuando se necesita)
+  - APIs incluyen pruebas de conectividad antes de ejecutar queries
+  - Logs detallados muestran el estado de conexión
+  - Actualizado a Node.js 20 para compatibilidad con Supabase
+
 #### Error: "Magic link not received"
 - **Causa**: SMTP no configurado en Supabase
 - **Solución**: