import "../setup.ts";
import { assertEquals } from "@std/assert";
import { FakeTime } from "@std/testing/time";
import { startJobs } from "../../lib/scheduler.ts";

Deno.test("startJobs: waits for the first run, then repeats, skipping a run still going", async () => {
  using time = new FakeTime();
  let runs = 0;
  let release = () => {};
  startJobs([{
    name: "slow",
    everyMs: 1_000,
    firstAfterMs: 500,
    run: () => {
      runs++;
      return new Promise<void>((resolve) => release = resolve);
    },
  }]);
  await time.tickAsync(499);
  assertEquals(runs, 0);
  await time.tickAsync(1);
  assertEquals(runs, 1);
  // Still running at the next tick: skipped.
  await time.tickAsync(1_000);
  assertEquals(runs, 1);
  release();
  await time.tickAsync(1_000);
  assertEquals(runs, 2);
});

Deno.test("startJobs: a failed run is logged, and the next one runs anyway", async () => {
  using time = new FakeTime();
  const errors: unknown[][] = [];
  const consoleError = console.error;
  console.error = (...args: unknown[]) => errors.push(args);
  try {
    let runs = 0;
    startJobs([{
      name: "flaky",
      everyMs: 1_000,
      run: () => {
        runs++;
        throw new Error("boom");
      },
    }]);
    await time.tickAsync(2_000);
    assertEquals(runs, 2);
    assertEquals(errors.length, 2);
    assertEquals(errors[0][0], "[flaky] run failed:");
  } finally {
    console.error = consoleError;
  }
});