import { TestFn } from "./test_fn.js";
import { color } from "./utils.js";

export class TestRunner {
  readonly name: string;
  readonly fn: TestFn;
  readonly ignore: boolean = false;
  readonly only: boolean = false;
  success = false;
  error?: Error = undefined;

  constructor(name: string, fn: TestFn, ignore: boolean, only: boolean) {
    this.name = name;
    this.fn = fn;
    this.ignore = ignore;
    this.only = only;
  }

  async run(): Promise<boolean> {
    if (this.ignore) {
      this.success = true;
      return this.success;
    }

    try {
      await this.fn();
      this.success = true;
    } catch (e) {
      this.success = false;
      this.error = e instanceof Error ? e : undefined;
    }

    return this.success;
  }

  result(quiet = false): void {
    if (this.ignore) {
      this.report("i", color("ignored", "yellow"), quiet);
    } else if (this.success) {
      this.report(".", color("ok", "green"), quiet);
    } else {
      this.report("F", color("FAILED", "red"), quiet);
    }
  }

  private report(short: string, long: string, quiet: boolean) {
    if (quiet) {
      process.stdout.write(`${short}`);
    } else {
      process.stdout.write(`test  ${this.name} ... ${long}\n`);
    }
  }
}