import { mkdirp, remove } from "fs-promise";
import { _, env } from "oly-core";
import { join } from "path";

/**
 * Provide a safe place to store files
 */
export class WorkspaceProvider {

  @env("WORKSPACE_DIRECTORY")
  public directory: string = join(process.cwd(), "workspace");

  @env("WORKSPACE_TMP")
  public tmp: string = ".tmp";

  /**
   * Generate a filepath. Useful for temp file or test.
   *
   * @return Random filepath
   */
  public rand(): string {
    return this.join(this.tmp, _.shortid());
  }

  /**
   * Get absolute path of workspace file.
   *
   * @param entry
   * @return {string}
   */
  public join(...entry: string[]): string {
    return join(this.directory, ...entry);
  }

  protected async onStart(): Promise<void> {
    await mkdirp(this.directory);
    await remove(this.join(this.tmp));
    await mkdirp(this.join(this.tmp));
  }

  protected async onStop(): Promise<void> {
    await remove(this.join(this.tmp));
  }
}