import { DataSource } from "typeorm";
import { Photo } from "./entity/photo";

const dataSource = new DataSource({
  type: "better-sqlite3",
  database: "db.sql",
  entities: [Photo],
  migrations: ["./migrations"],
})

export default class PhotoDataSource {
  private static _dataSource: DataSource | null = null;

  static get dataSource(): Promise<DataSource> {
    if (PhotoDataSource._dataSource === null) {
      return PhotoDataSource.initDataSource();
    } else {
      return Promise.resolve(PhotoDataSource._dataSource);
    }
  }

  static async initDataSource(): Promise<DataSource> {
    if (!PhotoDataSource._dataSource || !PhotoDataSource._dataSource.isInitialized) {
      const ds = await dataSource.initialize();
      console.log('Photo data source initialized')
      PhotoDataSource._dataSource = ds;
    }
    return PhotoDataSource._dataSource;
  }
}

PhotoDataSource.initDataSource();