# Migration and Validation System Summary

## Overview

A comprehensive migration and validation system has been implemented to transition from the old `config.defaults.toml` system to the new workspace-based target configuration architecture.

## Components Delivered

### 1. Migration Script

**File**: `/Users/Akasha/project-provisioning/provisioning/scripts/migrate-to-target-configs.nu`

**Features**:
- **Automatic detection** of old configuration files
- **Workspace structure creation** with proper directory hierarchy
- **Configuration transformation** from TOML to YAML with interpolation
- **Provider migration** with template-based generation
- **User context creation** for workspace management
- **Safety features**: dry-run mode, backup option, confirmation prompts

**Usage**:
```bash
# Dry run to preview changes
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "my-project" \
  --dry-run

# Execute with backup
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "my-project" \
  --backup

# Custom workspace path
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "production" \
  --workspace-path "/opt/workspaces/prod" \
  --backup
```

### 2. Schema Validator

**File**: `/Users/Akasha/project-provisioning/provisioning/core/nulib/lib_provisioning/config/schema_validator.nu`

**Validation Features**:
- **Required fields**: Ensures mandatory fields are present
- **Type checking**: Validates field types (string, int, bool, record)
- **Enum validation**: Restricts values to predefined sets
- **Range validation**: Validates min/max for numeric values
- **Pattern matching**: Regex validation for strings
- **Deprecation warnings**: Alerts for deprecated fields with replacements
- **Pretty printing**: Formatted validation results

**Functions**:
```nushell
# Core validation
validate-config-with-schema $config $schema_file

# Domain-specific validators
validate-provider-config "aws" $config
validate-platform-config "orchestrator" $config
validate-kms-config $config
validate-workspace-config $config

# Display results
print-validation-results $result
```

### 3. Test Suite

**File**: `/Users/Akasha/project-provisioning/provisioning/tests/config_validation_tests.nu`

**Test Coverage**:
- ✅ Required fields validation
- ✅ Type validation (int, string, bool)
- ✅ Enum validation
- ✅ Range validation (min/max)
- ✅ Pattern validation (regex)
- ✅ Deprecated fields warning

**Run Tests**:
```bash
nu /Users/Akasha/project-provisioning/provisioning/tests/config_validation_tests.nu
```

### 4. Documentation

**Migration Guide**: `/Users/Akasha/project-provisioning/provisioning/docs/MIGRATION_GUIDE.md`
- Step-by-step migration process
- Troubleshooting guide
- Rollback procedure
- Migration checklist

**Validation Guide**: `/Users/Akasha/project-provisioning/provisioning/docs/CONFIG_VALIDATION.md`
- Schema validation features
- Usage examples
- Common validation patterns
- Best practices

## Migration Workflow

### Phase 1: Preparation

```bash
# 1. Backup current configuration
cp -r provisioning/config provisioning/config.backup.$(date +%Y%m%d)

# 2. Review current configuration
provisioning env

# 3. Run dry-run migration
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "my-project" \
  --dry-run
```

### Phase 2: Execution

```bash
# 4. Execute migration with backup
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "my-project" \
  --backup

# Output shows:
# ✅ Created workspace structure
# ✅ Generated provisioning.yaml
# ✅ Migrated provider configs
# ✅ Created user context
```

### Phase 3: Validation

```bash
# 5. Validate workspace configuration
provisioning workspace config validate

# 6. Validate provider configurations
provisioning provider validate aws
provisioning provider validate upcloud

# 7. Validate platform services
provisioning platform validate orchestrator
```

### Phase 4: Testing

```bash
# 8. Test operations in check mode
provisioning --check server list
provisioning --check taskserv list

# 9. Run validation test suite
nu provisioning/tests/config_validation_tests.nu

# 10. Verify workspace status
provisioning workspace info
```

### Phase 5: Cleanup

```bash
# 11. Remove old configuration (after verification)
rm provisioning/config/config.defaults.toml
rm provisioning/config/config.user.toml

# Keep backup for reference
ls -la provisioning/config.backup.*
```

## New Workspace Structure

```
~/workspaces/{name}/
├── config/
│   ├── provisioning.yaml              # Main workspace config
│   ├── providers/
│   │   ├── aws.toml                  # AWS provider config
│   │   ├── upcloud.toml              # UpCloud provider config
│   │   └── local.toml                # Local provider config
│   └── platform/
│       ├── orchestrator.toml         # Orchestrator service config
│       ├── control-center.toml       # Control center config
│       └── kms.toml                  # KMS service config
├── infra/
│   └── {infra-name}/                 # Infrastructure definitions
├── .cache/                           # Cache directory
└── .runtime/                         # Runtime data

# User Context
~/Library/Application Support/provisioning/
└── ws_{name}.yaml                    # Workspace context
```

## Schema Validation Examples

### Workspace Schema

```toml
# Required fields
[required]
fields = ["workspace", "paths"]

# Type validation
[fields.workspace.name]
type = "string"
pattern = "^[a-z][a-z0-9-]*$"

# Enum validation
[fields.debug.log_level]
type = "string"
enum = ["debug", "info", "warn", "error"]
```

### Provider Schema (AWS)

```toml
[fields.provider.region]
type = "string"
pattern = "^[a-z]{2}-[a-z]+-\\d+$"

[fields.compute.default_ami]
type = "string"
pattern = "^ami-[a-f0-9]{8,17}$"

# Deprecation
[deprecated]
fields = ["old_region_field"]

[deprecated_replacements]
old_region_field = "provider.region"
```

### Platform Schema (Orchestrator)

```toml
[fields.server.port]
type = "int"
min = 1024
max = 65535

[fields.workers]
type = "int"
min = 1
max = 32
```

## Validation Results Format

### Success

```
✅ Validation passed
```

### Errors

```
❌ Validation failed

Errors:
  • Required field missing: workspace.name
  • Field port type mismatch: expected int, got string
  • Field environment must be one of: dev, staging, prod
  • Field email does not match pattern: ^[a-zA-Z0-9._%+-]+@.*$
```

### Warnings

```
⚠️  Warnings:
  • Field old_field is deprecated. Use new_field instead.
  • Field legacy_setting is deprecated. Use new_setting instead.
```

## Integration with CLI

### New Commands

```bash
# Workspace management
provisioning workspace config validate
provisioning workspace info
provisioning workspace list

# Provider validation
provisioning provider validate aws
provisioning provider validate --all

# Platform validation
provisioning platform validate orchestrator
provisioning platform validate --all
```

### Migration Command (Future)

```bash
# Integrated migration command
provisioning migrate config \
  --workspace-name "my-project" \
  --backup \
  --dry-run
```

## Testing

### Unit Tests

```bash
# Run validation test suite
nu /Users/Akasha/project-provisioning/provisioning/tests/config_validation_tests.nu

# Expected output:
# 🧪 Configuration Validation Test Suite
# ======================================
#
# Test 1: Required Fields Validation
#   ✅ PASSED
#
# Test 2: Type Validation
#   ✅ PASSED
#
# Test 3: Enum Validation
#   ✅ PASSED
#
# Test 4: Range Validation
#   ✅ PASSED
#
# Test 5: Pattern Validation
#   ✅ PASSED
#
# Test 6: Deprecated Fields Warning
#   ✅ PASSED
#
# 📊 Results: 6 passed, 0 failed
# ✅ All tests passed!
```

### Integration Tests

```bash
# Test workspace creation
provisioning workspace create test-workspace

# Validate created workspace
provisioning workspace config validate --workspace test-workspace

# Test provider configuration
provisioning provider validate aws --workspace test-workspace
```

## Error Handling

### Migration Errors

**Workspace exists**:
```bash
# Error: Workspace path already exists
# Solution: Use merge mode or different name
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "my-project-v2"
```

**Old config not found**:
```bash
# Info: No old config found. System may already be migrated.
# Solution: No action needed
```

### Validation Errors

**Schema not found**:
```bash
# Error: Schema file not found: /path/to/schema.toml
# Solution: Ensure schema files exist in correct location
```

**Type mismatch**:
```bash
# Error: Field port type mismatch: expected int, got string
# Solution: Fix config file (remove quotes from numbers)
```

## Best Practices

### 1. Always Backup

```bash
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "production" \
  --backup  # ← Always use --backup for production
```

### 2. Dry Run First

```bash
# Preview changes before applying
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "production" \
  --dry-run
```

### 3. Validate Early

```bash
# Validate during development
provisioning workspace config validate

# Validate before deployment
provisioning workspace config validate --verbose
```

### 4. Test Thoroughly

```bash
# Run test suite
nu provisioning/tests/config_validation_tests.nu

# Test operations in check mode
provisioning --check server list
```

### 5. Document Changes

```bash
# Keep migration log
./provisioning/scripts/migrate-to-target-configs.nu \
  --workspace-name "production" \
  --backup 2>&1 | tee migration.log
```

## Troubleshooting

### Common Issues

1. **Migration fails with "workspace exists"**
   - Use `--workspace-name` with different name
   - Or allow merge when prompted

2. **Validation fails after migration**
   - Check validation output for specific errors
   - Review and fix config files
   - Re-run validation

3. **Provider authentication fails**
   - Update credentials in provider config files
   - Validate provider configuration
   - Test provider connection

4. **Commands can't find configuration**
   - Check workspace context: `provisioning workspace info`
   - Activate workspace: `provisioning workspace activate my-project`
   - Or set: `export PROVISIONING_WORKSPACE="my-project"`

## Next Steps

1. **Review generated configurations** - Customize for your needs
2. **Update provider credentials** - Configure cloud provider access
3. **Test operations** - Run commands in `--check` mode
4. **Update CI/CD pipelines** - Integrate validation into pipelines
5. **Document customizations** - Keep team documentation updated

## Files Created

| File | Purpose |
|------|---------|
| `/Users/Akasha/project-provisioning/provisioning/scripts/migrate-to-target-configs.nu` | Migration script |
| `/Users/Akasha/project-provisioning/provisioning/core/nulib/lib_provisioning/config/schema_validator.nu` | Schema validation library |
| `/Users/Akasha/project-provisioning/provisioning/tests/config_validation_tests.nu` | Validation test suite |
| `/Users/Akasha/project-provisioning/provisioning/docs/MIGRATION_GUIDE.md` | Migration documentation |
| `/Users/Akasha/project-provisioning/provisioning/docs/CONFIG_VALIDATION.md` | Validation documentation |
| `/Users/Akasha/project-provisioning/provisioning/docs/MIGRATION_VALIDATION_SUMMARY.md` | This summary |

## Success Criteria

✅ **Migration script**:
- Detects old configuration
- Creates workspace structure
- Migrates provider configs
- Generates user context
- Safety features (dry-run, backup)

✅ **Schema validator**:
- Validates required fields
- Checks types
- Validates enums
- Range validation
- Pattern matching
- Deprecation warnings

✅ **Test suite**:
- 6 comprehensive tests
- All test scenarios covered
- Clear pass/fail reporting

✅ **Documentation**:
- Complete migration guide
- Validation guide with examples
- Troubleshooting procedures
- Best practices

## Conclusion

The migration and validation system provides a complete, safe, and validated path from the old configuration system to the new workspace-based architecture. All components are tested, documented, and ready for use.