# Migration Guide: From packages to libs

This guide will help you migrate your service to use the new library structure for better separation of concerns.

## Steps for each service

1. Update your `package.json` dependencies to use the new libraries:

```diff
  "dependencies": {
-    "@stock-bot/types": "workspace:*",
+    "@stock-bot/types": "workspace:*",
+    "@stock-bot/utils": "workspace:*",
+    "@stock-bot/event-bus": "workspace:*",
+    "@stock-bot/api-client": "workspace:*",
    ...
  }
```

2. Update your imports to use the domain-specific modules:

```diff
- import { OHLCV, Strategy, Order } from '@stock-bot/types';
+ import { OHLCV } from '@stock-bot/types';
+ import { Strategy } from '@stock-bot/types';
+ import { Order } from '@stock-bot/types';
```

For logging:
```diff
- // Custom logging or console.log usage
+ import { createLogger, LogLevel } from '@stock-bot/utils';
+ 
+ const logger = createLogger('your-service-name');
+ logger.info('Message');
```

For API client usage:
```diff
- // Manual axios calls
+ import { createBacktestClient, createStrategyClient } from '@stock-bot/api-client';
+ 
+ const backtestClient = createBacktestClient();
+ const result = await backtestClient.runBacktest(config);
```

For event-based communication:
```diff
- // Manual Redis/Dragonfly usage
+ import { createEventBus } from '@stock-bot/event-bus';
+ import { MarketDataEvent } from '@stock-bot/types';
+ 
+ const eventBus = createEventBus({
+   redisHost: process.env.REDIS_HOST || 'localhost',
+   redisPort: parseInt(process.env.REDIS_PORT || '6379')
+ });
+ 
+ eventBus.subscribe('market.data', async (event) => {
+   // Handle event
+ });
```

## Example: Updating BacktestEngine

```typescript
// Before
import { Strategy, BacktestConfig } from '@stock-bot/types';
import Redis from 'ioredis';

// After
import { Strategy } from '@stock-bot/types';
import { BacktestConfig } from '@stock-bot/types';
import { createLogger } from '@stock-bot/utils';
import { createEventBus } from '@stock-bot/event-bus';

const logger = createLogger('backtest-engine');
const eventBus = createEventBus({
  redisHost: process.env.REDIS_HOST || 'localhost',
  redisPort: parseInt(process.env.REDIS_PORT || '6379')
});
```

## Updating build scripts

If your turbo.json configuration references specific packages, update the dependencies:

```diff
  "backtest": {
    "dependsOn": [
      "^build",
-     "packages/types#build"
+     "libs/types#build",
+     "libs/utils#build",
+     "libs/event-bus#build",
+     "libs/api-client#build"
    ],
  }
```