/**
 * Value Object: NotificationChannel
 * 
 * Defines the delivery channels for notifications.
 */

export type NotificationChannel =
  | 'in_app'   // In-app notification (stored in database, shown in UI)
  | 'email'    // Email notification
  | 'discord'  // Discord webhook notification
  | 'push';    // Push notification (future: mobile/browser)

/**
 * Get human-readable name for channel
 */
export function getChannelDisplayName(channel: NotificationChannel): string {
  const names: Record<NotificationChannel, string> = {
    in_app: 'In-App',
    email: 'Email',
    discord: 'Discord',
    push: 'Push Notification',
  };
  return names[channel];
}

/**
 * Check if channel requires external integration
 */
export function isExternalChannel(channel: NotificationChannel): boolean {
  return channel !== 'in_app';
}

/**
 * Default channels that are always enabled
 */
export const DEFAULT_ENABLED_CHANNELS: NotificationChannel[] = ['in_app'];

/**
 * All available channels
 */
export const ALL_CHANNELS: NotificationChannel[] = ['in_app', 'email', 'discord', 'push'];