# @workshack/input

Workshack input components library with gamepad and keyboard navigation support for Angular applications.

## Installation

```bash
npm install @workshack/input
```

## Services

### InputService

**Description:** Core service for managing input devices, actions, and schemes.

**Usage:**
```typescript
import { InputService } from '@workshack/input';

@Component({
  // ...
})
export class MyComponent {
  constructor(private inputService: InputService) {
    // Define custom actions
    const jumpAction = this.inputService.defineAction('jump');
    jumpAction.onDown(() => console.log('Jump pressed!'));
    jumpAction.onUp(() => console.log('Jump released!'));
    
    // Create input scheme
    const gameScheme = this.inputService.defineScheme('game');
    
    // Listen for device changes
    this.inputService.deviceListChanged.subscribe(devices => {
      console.log('Available devices:', devices);
    });
  }
}
```

**Methods:**
- `defineAction(name: string): InputAction` - Creates a new input action
- `defineScheme(name: string): InputScheme` - Creates a new input scheme
- `getDevices(): InputDevice[]` - Returns list of available input devices

**Properties:**
- `actions: InputAction[]` - Array of defined actions
- `schemes: InputScheme[]` - Array of defined schemes
- `devices: InputDevice[]` - Array of connected devices
- `deviceListChanged: BehaviorSubject<InputDevice[]>` - Observable for device changes

---

### ControlService (Example Integration)

**Description:** Higher-level service that integrates with InputService to provide common navigation actions.

**Usage:**
```typescript
import { ControlService } from 'your-app/services/control.service';

@Component({
  // ...
})
export class MyComponent {
  constructor(private controlService: ControlService) {
    // Service automatically sets up common actions:
    // - Left, Right, Up, Down navigation
    // - Accept, Back, Exit actions
    // - Hint/Help action
    
    // Get key names for display
    const keyNames = this.controlService.getKeyNames('Enter', 'Escape');
    console.log('Key names:', keyNames); // ['Enter', 'Escape'] or themed names
  }
}
```

**Static Properties:**
- `keyLeft: InputAction` - Left navigation action
- `keyRight: InputAction` - Right navigation action  
- `keyUp: InputAction` - Up navigation action
- `keyDown: InputAction` - Down navigation action
- `keyAccept: InputAction` - Accept/confirm action
- `keyBack: InputAction` - Back/cancel action
- `keyExit: InputAction` - Exit action
- `keyHint: InputAction` - Hint/help action

**Methods:**
- `getKeyNames(...names): string[]` - Get themed key names for display
- `clearKeyBindings()` - Clear all key bindings from schemes
- `bindActionsToScheme(device: InputDevice)` - Bind actions to device scheme

## Directives

### ActionBindingDirective

**Selector:** `[inputActionBinding]`  
**Description:** Binds an action name to an HTML element.

**Usage:**
```html
<button inputActionBinding="confirm">Confirm</button>
<div inputActionBinding="back">Back</div>
```

**Properties:**
- `inputActionBinding: string` - Action name to bind to the element

**Features:**
- Automatically sets `action` attribute on the element
- Works with keyboard and gamepad navigation

---

### KeyItemDirective

**Selector:** `[inputKeyItem]`  
**Description:** Makes an element navigable with keyboard/gamepad and handles focus states.

**Usage:**
```html
<button 
  inputKeyItem
  [active]="'focused'"
  [actionBindings]="{
    Accept: () => onClick(),
    Back: () => onCancel()
  }"
  (activated)="onActivated()"
  (focused)="onFocused()"
  (blurred)="onBlurred()">
  Click me
</button>
```

**Properties:**
- `active: string` - CSS class name for active/focused state (default: 'active')
- `actionBindings: ActionBindings` - Object mapping action names to callback functions

**Events:**
- `activated: EventEmitter<void>` - Emitted when item is activated
- `deactivated: EventEmitter<void>` - Emitted when item is deactivated
- `focused: EventEmitter<void>` - Emitted when item receives focus
- `blurred: EventEmitter<void>` - Emitted when item loses focus

**Static Methods:**
- `FireAction(action: string): boolean` - Fires action on currently focused item
- `ActivateCurrentItem()` - Activates the currently focused item
- `SelectNexItem(fromAngle: number, toAngle: number)` - Selects next item in direction

---

### KeyItemGroupDirective

**Selector:** `[inputKeyItemGroup]`  
**Description:** Groups KeyItem elements for scoped navigation.

**Usage:**
```html
<div inputKeyItemGroup>
  <button inputKeyItem>Button 1</button>
  <button inputKeyItem>Button 2</button>
  <button inputKeyItem>Button 3</button>
</div>
```

**Features:**
- Navigation is scoped to items within the group
- Automatically manages focus within the group
- Supports nested groups

## Models

### InputAction

**Description:** Represents a bindable input action (e.g., "jump", "fire", "menu").

**Usage:**
```typescript
const jumpAction = new InputAction('jump');

// Bind callbacks
jumpAction.onDown((value, data, angle, timePressed) => {
  console.log('Jump started!', { value, data, angle, timePressed });
});

jumpAction.onUp((value, data, angle, timePressed) => {
  console.log('Jump ended!', { value, data, angle, timePressed });
});

jumpAction.onChange((value, data, angle, timePressed) => {
  console.log('Jump value changed:', value);
});

// Fire the action
jumpAction.fire(1.0); // Press
jumpAction.fire(0.0); // Release
```

**Methods:**
- `onDown(callback: ActionCallback)` - Register callback for action press
- `onUp(callback: ActionCallback)` - Register callback for action release
- `onChange(callback: ActionCallback)` - Register callback for value changes
- `fire(value: number, data?: unknown, angle?: number, timePressed?: number)` - Fire the action
- `mapKeysToScheme(scheme: InputScheme, keys: (string|number)[])` - Map keys to scheme

---

### InputDevice

**Description:** Base class for input devices (keyboard, gamepad).

**Properties:**
- `name: string` - Device name
- `type: string` - Device type ('keyboard', 'gamepad')

**Methods:**
- `hasScheme(): boolean` - Check if device has an input scheme
- `mapKey(action: InputAction, keys: (string|number)[])` - Map keys to action

---

### InputKeyboard

**Description:** Keyboard input device implementation.

**Usage:**
```typescript
const keyboard = new InputKeyboard('Main Keyboard');
keyboard.mapKey(jumpAction, ['Space', 'KeyW']);
```

---

### InputGamepad

**Description:** Gamepad input device implementation with automatic detection.

**Static Properties:**
- `DeviceConnected: Subject<InputGamepad>` - Observable for gamepad connections
- `DeviceDisconnected: Subject<InputGamepad>` - Observable for gamepad disconnections

**Static Methods:**
- `Init()` - Initialize gamepad detection

**Usage:**
```typescript
// Listen for gamepad events
InputGamepad.DeviceConnected.subscribe(gamepad => {
  console.log('Gamepad connected:', gamepad.name);
  gamepad.mapKey(jumpAction, [0]); // Map to button 0
});

InputGamepad.DeviceDisconnected.subscribe(gamepad => {
  console.log('Gamepad disconnected:', gamepad.name);
});

// Initialize detection
InputGamepad.Init();
```

## Complete Example

```typescript
import { Component, OnInit } from '@angular/core';
import { 
  InputService, 
  NavigationModule,
  KeyItemDirective,
  KeyItemGroupDirective,
  ActionBindingDirective 
} from '@workshack/input';

@Component({
  selector: 'app-game-menu',
  imports: [
    NavigationModule,
    KeyItemDirective, 
    KeyItemGroupDirective,
    ActionBindingDirective
  ],
  template: `
    <div class="game-menu" inputKeyItemGroup>
      <h2>Game Menu</h2>
      
      <button 
        inputKeyItem
        [actionBindings]="{
          Accept: () => startGame(),
          Back: () => goBack()
        }"
        (focused)="playHoverSound()"
        class="menu-item">
        Start Game
      </button>
      
      <button 
        inputKeyItem
        [actionBindings]="{
          Accept: () => showOptions(),
          Back: () => goBack()
        }"
        (focused)="playHoverSound()"
        class="menu-item">
        Options
      </button>
      
      <button 
        inputKeyItem
        [actionBindings]="{
          Accept: () => exitGame(),
          Back: () => goBack()
        }"
        (focused)="playHoverSound()"
        class="menu-item">
        Exit
      </button>
      
      <div class="controls-hint">
        <span>Use arrow keys or gamepad to navigate</span>
        <span>Press Enter or A to select</span>
      </div>
    </div>
  `,
  styles: [`
    .game-menu {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1rem;
      padding: 2rem;
    }
    
    .menu-item {
      padding: 1rem 2rem;
      background: #333;
      color: white;
      border: 2px solid transparent;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.2s;
    }
    
    .menu-item.active,
    .menu-item:hover {
      background: #555;
      border-color: #007bff;
      transform: scale(1.05);
    }
    
    .controls-hint {
      display: flex;
      flex-direction: column;
      text-align: center;
      font-size: 0.8rem;
      color: #666;
      margin-top: 2rem;
    }
  `]
})
export class GameMenuComponent implements OnInit {
  
  constructor(private inputService: InputService) {}
  
  ngOnInit() {
    // Set up custom actions
    const menuAction = this.inputService.defineAction('menu');
    menuAction.onUp(() => this.toggleMenu());
    
    // Listen for device changes
    this.inputService.deviceListChanged.subscribe(devices => {
      console.log('Input devices:', devices.map(d => d.name));
    });
  }
  
  startGame() {
    console.log('Starting game...');
  }
  
  showOptions() {
    console.log('Showing options...');
  }
  
  exitGame() {
    console.log('Exiting game...');
  }
  
  goBack() {
    console.log('Going back...');
    return false; // Prevent default navigation
  }
  
  playHoverSound() {
    // Play hover sound effect
    console.log('Hover sound');
  }
  
  toggleMenu() {
    console.log('Toggle menu');
  }
}
```

## Features

- 🎮 **Gamepad Support** - Automatic detection and mapping for standard gamepads
- ⌨️ **Keyboard Navigation** - Full keyboard navigation with customizable key bindings
- 🖱️ **Mouse/Touch Support** - Works seamlessly with mouse and touch interactions
- 🎯 **Action Binding System** - Flexible system for binding actions to inputs
- 📐 **Directional Navigation** - Smart directional navigation based on element positions
- 🎨 **Customizable Themes** - Support for different key name themes (PlayStation, Xbox, etc.)
- 🔄 **Hot-plugging** - Automatic detection of connected/disconnected devices
- 🎛️ **Multiple Schemes** - Support for multiple input schemes per device

## Development

### Building
```bash
npm run build:input
```

### Watching for changes
```bash
npm run watch:input
```

### Testing
```bash
npm run test:input
```

### Publishing
```bash
npm run publish:input
```

## License

This library is licensed under a custom license that allows:

- **Free use** for non-commercial applications (no revenue, no ads, no paid features)
- **Commercial use** with attribution requirement - you must credit the library in your app (e.g., on an "About" or "For Developers" page)

For full license terms, see the [LICENSE](LICENSE) file.

### Attribution Example for Commercial Use

```
This application uses Workshack Input Library 
(https://www.npmjs.com/package/@workshack/input) 
© 2025 Workshack Team
```