# API Contracts: Migration Process and UI Redesign

## Environment Management

### GET /api/environments
List all configured environments.

**Response (200 OK)**:
```json
[
  {
    "id": "uuid",
    "name": "Development",
    "url": "https://superset-dev.example.com"
  }
]
```

### GET /api/environments/{id}/databases
Fetch the list of databases from a specific environment.

**Response (200 OK)**:
```json
[
  {
    "uuid": "db-uuid",
    "database_name": "Dev Clickhouse",
    "engine": "clickhouse"
  }
]
```

## Database Mapping

### GET /api/mappings
List all saved database mappings.

**Query Parameters**:
- `source_env_id`: Filter by source environment.
- `target_env_id`: Filter by target environment.

**Response (200 OK)**:
```json
[
  {
    "id": "uuid",
    "source_env_id": "uuid",
    "target_env_id": "uuid",
    "source_db_uuid": "uuid",
    "target_db_uuid": "uuid",
    "source_db_name": "Dev Clickhouse",
    "target_db_name": "Prod Clickhouse"
  }
]
```

### POST /api/mappings
Create or update a database mapping.

**Request Body**:
```json
{
  "source_env_id": "uuid",
  "target_env_id": "uuid",
  "source_db_uuid": "uuid",
  "target_db_uuid": "uuid"
}
```

### POST /api/mappings/suggest
Get suggested mappings based on fuzzy matching.

**Request Body**:
```json
{
  "source_env_id": "uuid",
  "target_env_id": "uuid"
}
```

**Response (200 OK)**:
```json
[
  {
    "source_db_uuid": "uuid",
    "target_db_uuid": "uuid",
    "confidence": 0.95
  }
]
```

## Migration Execution

### POST /api/migrations
Start a migration job.

**Request Body**:
```json
{
  "source_env_id": "uuid",
  "target_env_id": "uuid",
  "assets": [
    {"type": "dashboard", "id": 123}
  ],
  "replace_db": true
}
```

**Response (202 Accepted)**:
```json
{
  "job_id": "uuid",
  "status": "RUNNING"
}
```