# 🚀 Safe Database Migration Script

A clean, focused script for safe database migrations with automatic backup and cleanup.

## 📋 Features

- ✅ **Connectivity Check**: Verifies database connection before proceeding
- ✅ **Automatic Backup**: Creates backup with retry logic (3 attempts)
- ✅ **Safety First**: Exits if backup fails - no migration without backup
- ✅ **Smart PostgreSQL**: Uses Docker PostgreSQL client if `psql` not available
- ✅ **Migration**: Runs Entity Framework migrations
- ✅ **Verification**: Checks migration success
- ✅ **Cleanup**: Keeps only last 5 backups per environment

## 🛠️ Usage

```bash
# Development environment
./safe-migrate.sh Development

# Sandbox environment
./safe-migrate.sh Sandbox

# Production environment
./safe-migrate.sh Production
```

## 🔄 Process Flow

1. **Environment Validation**: Validates environment parameter
2. **Connectivity Check**: Tests database connection
3. **Backup Creation**: Creates backup with retry logic
4. **Migration**: Runs pending migrations
5. **Verification**: Checks migration success
6. **Cleanup**: Removes old backups (keeps last 5)

## 🚨 Safety Features

- **Mandatory Backup**: Script exits if backup cannot be created
- **Retry Logic**: 3 backup attempts with 5-second delays
- **Error Handling**: Clear error messages and exit codes
- **Logging**: Detailed logs for troubleshooting

## 📊 Output

```
✅ Database connectivity test passed
✅ Database backup created: ./backups/managing_Development_backup_20250726_043047.sql
✅ Database migration completed successfully
✅ Database schema verification passed
✅ Kept last 5 backups for Development environment
```

## 🔧 Prerequisites

- Docker (for PostgreSQL client)
- .NET 8.0 SDK
- Access to target database

## 📁 Files

- **Backups**: `./backups/managing_[Environment]_backup_[Timestamp].sql`
- **Logs**: `./migration_[Environment]_[Timestamp].log`
