# Quick Start Guide - useMutationOptions

## Installation

Already included in `@lilith/react-query-utils`

## Basic Usage

```typescript
import { useMutation } from '@tanstack/react-query';
import { useMutationOptions } from '@lilith/react-query-utils';

function useCreateItem() {
  const options = useMutationOptions({
    operation: 'create item',
    invalidateKeys: [['items']],
  });

  return useMutation({
    mutationFn: (data) => apiClient.post('/items', data),
    ...options,
  });
}
```

## Common Patterns

### Pattern 1: Simple CRUD

```typescript
// Create
const options = useMutationOptions({
  operation: 'create user',
  invalidateKeys: [['users']],
});

// Update
const options = useMutationOptions({
  operation: 'update user',
  invalidateKeys: [['users'], ['users', userId]],
});

// Delete
const options = useMutationOptions({
  operation: 'delete user',
  invalidateKeys: [['users']],
});
```

### Pattern 2: Custom Messages

```typescript
const options = useMutationOptions({
  operation: 'publish post',
  successMessage: 'Your post is now live!', // Custom
  invalidateKeys: [['posts']],
});

// OR disable message
const options = useMutationOptions({
  operation: 'sync settings',
  successMessage: false, // No toast
  invalidateKeys: [['settings']],
});
```

### Pattern 3: Multiple Invalidations

```typescript
const options = useMutationOptions({
  operation: 'complete task',
  invalidateKeys: [
    ['tasks'],           // All tasks
    ['tasks', taskId],   // Specific task
    ['stats'],           // Stats dashboard
  ],
});
```

### Pattern 4: Custom Callbacks

```typescript
const options = useMutationOptions({
  operation: 'upload file',
  onSuccess: (file) => {
    navigate(`/files/${file.id}`);
  },
  onError: (error) => {
    analytics.track('Upload Failed', { error });
  },
});
```

### Pattern 5: Type Safety

```typescript
interface User {
  id: string;
  name: string;
}

interface CreateUserDto {
  name: string;
  email: string;
}

const options = useMutationOptions<User, CreateUserDto>({
  operation: 'create user',
  onSuccess: (user) => {
    // user is typed as User
    console.log(user.id);
  },
});
```

## Configuration Options

| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `operation` | `string` | **Required** | Operation name (e.g., "create user") |
| `successMessage` | `string \| false` | Capitalized operation | Toast message or `false` to disable |
| `invalidateKeys` | `Array<string \| string[]>` | `undefined` | Query keys to invalidate |
| `onSuccess` | `(data) => void` | `undefined` | Custom success handler |
| `onError` | `(error) => void` | `undefined` | Custom error handler |
| `enableErrorLogging` | `boolean` | `true` | Log errors to console |

## What It Does Automatically

✅ **Success Handling:**
- Shows toast notification
- Invalidates specified queries
- Calls custom callbacks

✅ **Error Handling:**
- Extracts error message from API response
- Shows error toast
- Logs to console (optional)
- Calls custom error handler

✅ **Type Safety:**
- Full TypeScript support
- Generic types for data and variables
- Compatible with React Query types

## Before/After Example

### Before (Manual)
```typescript
export function useCreateUser() {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: (data) => apiClient.post('/users', data),
    onSuccess: (user) => {
      toast.success('User created!');
      queryClient.invalidateQueries({ queryKey: ['users'] });
    },
    onError: (error) => {
      toast.error(getErrorMessage(error));
      console.error('[create user]:', error);
    },
  });
}
```

### After (With useMutationOptions)
```typescript
export function useCreateUser() {
  const options = useMutationOptions({
    operation: 'create user',
    successMessage: 'User created!',
    invalidateKeys: [['users']],
  });

  return useMutation({
    mutationFn: (data) => apiClient.post('/users', data),
    ...options,
  });
}
```

**Result:** 60% less code, standardized behavior

## Tips

💡 **Tip 1:** Use descriptive operation names
```typescript
// Good
operation: 'create user account'
operation: 'publish blog post'
operation: 'complete checkout'

// Avoid
operation: 'create'
operation: 'update'
operation: 'submit'
```

💡 **Tip 2:** Invalidate related queries
```typescript
// When updating a user, invalidate both list and detail
invalidateKeys: [
  ['users'],        // List query
  ['users', userId] // Detail query
]
```

💡 **Tip 3:** Disable logging in production
```typescript
const options = useMutationOptions({
  operation: 'sync data',
  enableErrorLogging: import.meta.env.DEV, // Only in dev
});
```

💡 **Tip 4:** Use custom callbacks for navigation
```typescript
const navigate = useNavigate();

const options = useMutationOptions({
  operation: 'create post',
  onSuccess: (post) => {
    navigate(`/posts/${post.id}`);
  },
});
```

## Troubleshooting

**Q: Toast not showing?**
A: Make sure `react-hot-toast` is set up in your app with `<Toaster />` component.

**Q: Queries not invalidating?**
A: Check that query keys match exactly (array equality is strict).

**Q: TypeScript errors?**
A: Provide generic types: `useMutationOptions<DataType, VariablesType>({ ... })`

**Q: Want to add loading states?**
A: Use `isPending` from the mutation: `const { mutate, isPending } = useMutation({ ... })`

## See Also

- [README.md](./README.md) - Complete documentation
- [EXAMPLES.md](./EXAMPLES.md) - Real-world examples
- [CHANGELOG.md](./CHANGELOG.md) - Version history