app-config.service.ts

import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';

/**
 * Typed accessor over the raw {@link ConfigService}. Every consumer reads
 * configuration through these getters instead of sprinkling string keys like
 * `config.get('API_KEY')` around the codebase — one place to rename a key,
 * change a default, or add parsing (e.g. CSV → string[]).
 */
@Injectable()
export class AppConfigService {
  constructor(private readonly config: ConfigService) {}

  get port(): number {
    return this.config.get<number>('PORT', 4000);
  }

  get apiKey(): string {
    return this.config.getOrThrow<string>('API_KEY');
  }

  get corsOrigins(): string[] {
    return this.config
      .getOrThrow<string>('CORS_ORIGIN')
      .split(',')
      .map((origin) => origin.trim())
      .filter(Boolean);
  }

  /** Whether to seed demo tasks on first boot. Defaults to true; set
   *  `SEED_DATA=false` to start with an empty board. */
  get seedEnabled(): boolean {
    return this.config.get<string>('SEED_DATA') !== 'false';
  }
}