# Guía de Despliegue

## Requisitos del Servidor

### Hardware Mínimo
- **CPU:** 2 cores
- **RAM:** 4 GB
- **Disco:** 50 GB SSD

### Hardware Recomendado
- **CPU:** 4 cores
- **RAM:** 8 GB
- **Disco:** 100 GB SSD

### Software
- Ubuntu 22.04 LTS (recomendado) o Debian 12
- Docker 24.0+
- Docker Compose 2.20+
- Git

---

## Instalación

### 1. Preparar Servidor

```bash
# Actualizar sistema
sudo apt update && sudo apt upgrade -y

# Instalar Docker
curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh

# Agregar usuario al grupo docker
sudo usermod -aG docker $USER

# Instalar Docker Compose
sudo apt install docker-compose-plugin -y

# Verificar instalación
docker --version
docker compose version
```

### 2. Clonar Repositorio

```bash
cd /opt
sudo git clone https://git.consultoria-as.com/tu-usuario/WhatsAppCentralizado.git
sudo chown -R $USER:$USER WhatsAppCentralizado
cd WhatsAppCentralizado
```

### 3. Configurar Variables de Entorno

```bash
cp .env.example .env
nano .env
```

**Variables requeridas:**

```bash
# Base de datos
DB_USER=whatsapp_admin
DB_PASSWORD=<password_seguro_32_caracteres>

# JWT Secret (generar aleatorio)
JWT_SECRET=<secreto_aleatorio_64_caracteres>

# Dominio
DOMAIN=chat.tuempresa.com

# Odoo (opcional, configurar después)
ODOO_URL=https://odoo.tuempresa.com
ODOO_DB=production
ODOO_USER=api-whatsapp@tuempresa.com
ODOO_API_KEY=<api_key_de_odoo>

# OpenAI (opcional, para AI Response)
OPENAI_API_KEY=sk-...
```

**Generar secrets:**
```bash
# Generar password DB
openssl rand -base64 32

# Generar JWT secret
openssl rand -base64 64
```

### 4. Construir e Iniciar

```bash
# Construir imágenes
docker compose build

# Iniciar servicios
docker compose up -d

# Ver logs
docker compose logs -f
```

### 5. Inicializar Base de Datos

```bash
# Aplicar migraciones
docker compose exec api-gateway alembic upgrade head

# Crear usuario admin
docker compose exec api-gateway python scripts/create_admin.py
```

### 6. Configurar SSL con Let's Encrypt

```bash
# Instalar certbot
sudo apt install certbot -y

# Obtener certificado
sudo certbot certonly --standalone -d chat.tuempresa.com

# Los certificados quedan en:
# /etc/letsencrypt/live/chat.tuempresa.com/fullchain.pem
# /etc/letsencrypt/live/chat.tuempresa.com/privkey.pem

# Copiar a directorio del proyecto
sudo cp /etc/letsencrypt/live/chat.tuempresa.com/fullchain.pem nginx/ssl/cert.pem
sudo cp /etc/letsencrypt/live/chat.tuempresa.com/privkey.pem nginx/ssl/key.pem

# Reiniciar nginx
docker compose restart nginx
```

### 7. Configurar Renovación Automática

```bash
# Crear script de renovación
sudo nano /etc/cron.d/certbot-renew
```

```
0 3 * * * root certbot renew --quiet --post-hook "cp /etc/letsencrypt/live/chat.tuempresa.com/*.pem /opt/WhatsAppCentralizado/nginx/ssl/ && docker compose -f /opt/WhatsAppCentralizado/docker-compose.yml restart nginx"
```

---

## Configuración de Nginx

### nginx/nginx.conf

```nginx
events {
    worker_connections 1024;
}

http {
    upstream frontend {
        server frontend:80;
    }

    upstream api {
        server api-gateway:8000;
    }

    upstream websocket {
        server whatsapp-core:3001;
    }

    # Redirect HTTP to HTTPS
    server {
        listen 80;
        server_name chat.tuempresa.com;
        return 301 https://$server_name$request_uri;
    }

    # HTTPS Server
    server {
        listen 443 ssl http2;
        server_name chat.tuempresa.com;

        ssl_certificate /etc/nginx/ssl/cert.pem;
        ssl_certificate_key /etc/nginx/ssl/key.pem;
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256;
        ssl_prefer_server_ciphers off;

        # Security headers
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;

        # Frontend
        location / {
            proxy_pass http://frontend;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
        }

        # API
        location /api {
            proxy_pass http://api;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;

            # Timeouts para operaciones largas
            proxy_read_timeout 300;
            proxy_connect_timeout 300;
            proxy_send_timeout 300;
        }

        # Auth endpoints
        location /auth {
            proxy_pass http://api;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
        }

        # WebSocket
        location /ws {
            proxy_pass http://websocket;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_read_timeout 86400;
        }

        # Webhook de Odoo
        location /api/odoo/webhook {
            proxy_pass http://api;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
        }

        # Media files
        location /media {
            alias /var/www/media;
            expires 30d;
            add_header Cache-Control "public, immutable";
        }
    }
}
```

---

## Backups

### Script de Backup

```bash
#!/bin/bash
# /opt/WhatsAppCentralizado/scripts/backup.sh

BACKUP_DIR="/opt/backups/whatsapp"
DATE=$(date +%Y%m%d_%H%M%S)
RETENTION_DAYS=30

mkdir -p $BACKUP_DIR

# Backup PostgreSQL
docker compose exec -T postgres pg_dump -U $DB_USER whatsapp_central | gzip > $BACKUP_DIR/db_$DATE.sql.gz

# Backup sesiones WhatsApp
tar -czf $BACKUP_DIR/sessions_$DATE.tar.gz -C /var/lib/docker/volumes whatsapp_sessions

# Backup configuración
tar -czf $BACKUP_DIR/config_$DATE.tar.gz .env docker-compose.yml nginx/

# Eliminar backups antiguos
find $BACKUP_DIR -type f -mtime +$RETENTION_DAYS -delete

echo "Backup completado: $DATE"
```

### Programar Backup

```bash
# Editar crontab
crontab -e
```

```
# Backup diario a las 3 AM
0 3 * * * /opt/WhatsAppCentralizado/scripts/backup.sh >> /var/log/whatsapp-backup.log 2>&1
```

### Restaurar Backup

```bash
# Restaurar base de datos
gunzip -c backup/db_20240115.sql.gz | docker compose exec -T postgres psql -U $DB_USER whatsapp_central

# Restaurar sesiones
docker compose down
tar -xzf backup/sessions_20240115.tar.gz -C /var/lib/docker/volumes
docker compose up -d
```

---

## Monitoreo

### Logs

```bash
# Ver todos los logs
docker compose logs -f

# Ver logs de servicio específico
docker compose logs -f api-gateway
docker compose logs -f whatsapp-core

# Ver últimas 100 líneas
docker compose logs --tail=100 api-gateway
```

### Healthchecks

```bash
# Estado de contenedores
docker compose ps

# Uso de recursos
docker stats
```

### Verificar Servicios

```bash
# API
curl -s https://chat.tuempresa.com/api/health | jq

# Frontend
curl -I https://chat.tuempresa.com

# WebSocket
wscat -c wss://chat.tuempresa.com/ws
```

---

## Actualización

### Proceso de Actualización

```bash
cd /opt/WhatsAppCentralizado

# Hacer backup primero
./scripts/backup.sh

# Obtener cambios
git pull origin main

# Reconstruir imágenes
docker compose build

# Aplicar migraciones
docker compose exec api-gateway alembic upgrade head

# Reiniciar servicios
docker compose up -d

# Verificar logs
docker compose logs -f
```

### Rollback

```bash
# Volver a versión anterior
git checkout <commit_anterior>

# Reconstruir
docker compose build
docker compose up -d

# Restaurar base de datos si es necesario
gunzip -c backup/db_<fecha>.sql.gz | docker compose exec -T postgres psql -U $DB_USER whatsapp_central
```

---

## Troubleshooting

### Problemas Comunes

#### Contenedor no inicia
```bash
# Ver logs detallados
docker compose logs <servicio>

# Verificar configuración
docker compose config
```

#### Error de conexión a PostgreSQL
```bash
# Verificar que postgres está corriendo
docker compose ps postgres

# Verificar credenciales
docker compose exec postgres psql -U $DB_USER -d whatsapp_central
```

#### WhatsApp no conecta
```bash
# Verificar logs de whatsapp-core
docker compose logs whatsapp-core

# Verificar sesiones
ls -la volumes/whatsapp_sessions/

# Reiniciar servicio
docker compose restart whatsapp-core
```

#### Frontend no carga
```bash
# Verificar build
docker compose logs frontend

# Reconstruir frontend
docker compose build frontend
docker compose up -d frontend
```

### Comandos Útiles

```bash
# Reiniciar todo
docker compose restart

# Reiniciar servicio específico
docker compose restart api-gateway

# Reconstruir sin cache
docker compose build --no-cache

# Limpiar volúmenes (¡CUIDADO!)
docker compose down -v

# Ver uso de disco
docker system df

# Limpiar imágenes no usadas
docker image prune -a
```

---

## Seguridad

### Firewall

```bash
# Instalar ufw
sudo apt install ufw

# Configurar reglas
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp

# Activar
sudo ufw enable
```

### Fail2ban

```bash
# Instalar
sudo apt install fail2ban

# Configurar para nginx
sudo nano /etc/fail2ban/jail.local
```

```ini
[nginx-http-auth]
enabled = true
port = http,https
logpath = /var/log/nginx/error.log
maxretry = 3
bantime = 3600
```

### Actualizaciones de Seguridad

```bash
# Habilitar actualizaciones automáticas
sudo apt install unattended-upgrades
sudo dpkg-reconfigure unattended-upgrades
```

---

## Escalamiento

### Múltiples Números WhatsApp

Para manejar muchos números, escalar whatsapp-core:

```yaml
# docker-compose.override.yml
services:
  whatsapp-core:
    deploy:
      replicas: 3
    volumes:
      - whatsapp_sessions:/app/sessions
```

### Alta Disponibilidad

Para producción de alta disponibilidad:

1. **Load Balancer** externo (HAProxy, AWS ALB)
2. **PostgreSQL** en cluster (Patroni) o managed (RDS)
3. **Redis** en cluster o managed (ElastiCache)
4. **Storage** compartido para sesiones (NFS, EFS)

---

## Contacto

Para soporte técnico, contactar al equipo de desarrollo.