stack/packages/mosaic/src/config/config-service.ts

import type { SoulConfig, UserConfig, ToolsConfig, InstallAction } from '../types.js';
import { FileConfigAdapter } from './file-adapter.js';

/**
 * ConfigService interface — abstracts config read/write operations.
 * Currently backed by FileConfigAdapter (writes .md files from templates).
 * Designed for future swap to SqliteConfigAdapter or PostgresConfigAdapter.
 */
export interface ConfigService {
  readSoul(): Promise<SoulConfig>;
  readUser(): Promise<UserConfig>;
  readTools(): Promise<ToolsConfig>;

  writeSoul(config: SoulConfig): Promise<void>;
  writeUser(config: UserConfig): Promise<void>;
  writeTools(config: ToolsConfig): Promise<void>;

  syncFramework(action: InstallAction): Promise<void>;
}

export function createConfigService(mosaicHome: string, sourceDir: string): ConfigService {
  return new FileConfigAdapter(mosaicHome, sourceDir);
}