# Configuração para Cloud SQL Proxy (Optional)

Para usar Cloud SQL em vez de PostgreSQL local:

## 1. Instale o Cloud SQL Proxy

```bash
sudo curl https://dl.google.com/cloudsql/cloud_sql_proxy.linux.amd64 -o cloud_sql_proxy
sudo chmod +x cloud_sql_proxy
```

## 2. Crie uma Service Account

```bash
# No Cloud Console ou via gcloud
gcloud iam service-accounts create cloudsql-proxy \
    --display-name="Cloud SQL Proxy"

# Dê permissões
gcloud projects add-iam-policy-binding PROJECT_ID \
    --member="serviceAccount:cloudsql-proxy@PROJECT_ID.iam.gserviceaccount.com" \
    --role="roles/cloudsql.client"
```

## 3. Configure Variáveis de Ambiente

```env
# Opção A: Unix Socket (recomendado)
DB_HOST=/cloudsql/PROJECT_ID:REGION:INSTANCE_NAME

# Opção B: TCP
DB_HOST=127.0.0.1
DB_PORT=5432
```

## 4. Inicie o Proxy

```bash
./cloud_sql_proxy -instances=PROJECT_ID:REGION:INSTANCE_NAME=tcp:5432 \
    -credential_file=/path/to/service-account-key.json
```

## 5. No Cloud Run

A variável DATABASE_URL deve ser:

```
postgresql://user:password@/cloudsql/PROJECT_ID:REGION:INSTANCE_NAME/database
```

O Cloud Run injeta automaticamente a credencial da service account do projeto.

## Referência

- [Cloud SQL Proxy Docs](https://cloud.google.com/sql/docs/postgres/cloud-sql-proxy)
- [Cloud SQL Python Connector](https://github.com/GoogleCloudPlatform/cloud-sql-python-connector)