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import { formatDecimal, formatNumber } from '../index.ts';
type ExecFn = (...params: any[]) => unknown;
const NUM_PAD = 16;const PRE_PAD = 32;
function loop (exec: ExecFn, count: number, inputs: readonly unknown[][]): [number, unknown[]] {  const start = performance.now();  const results = new Array<unknown>(inputs.length);
  for (let i = 0; i < count; i++) {    const result = exec(...inputs[i % inputs.length]);
    if (i < inputs.length) {      results[i] = result;    }  }
  return [performance.now() - start, results];}
export function formatFixed (value: number): string {  const [a, b] = value.toFixed(2).split('.');
  return [formatDecimal(a), b].join('.');}
export function formatOps (count: number, time: number): string {  const micro = (time * 1000) / count;  const ops = 1_000_000 / micro;
  return `${formatFixed(ops).padStart(NUM_PAD + PRE_PAD + 1)} ops/s${formatFixed(micro).padStart(NUM_PAD + PRE_PAD + 1)} μs/op`;}
export function perf (name: string, count: number, inputs: readonly unknown[][], exec: ExecFn, withLog?: boolean): void {  const test = process.env.GITHUB_REPOSITORY    ? it.skip    : it;
  test(`performance: ${name}`, (): void => {    const [time, results] = loop(exec, count, inputs);
    console.error(`performance run for ${name} completed with ${formatNumber(count)} iterations.
${`${name}:`.padStart(PRE_PAD)} ${time.toFixed(2).padStart(NUM_PAD)} ms${formatOps(count, time)}`);
    if (withLog) {      console.log(results);    }  });}
export function perfCmp (name: string, [first, second]: [string, string], count: number, inputs: readonly unknown[][], exec: ExecFn): void {  const test = process.env.GITHUB_REPOSITORY    ? it.skip    : it;
  test(`performance: ${name}`, (): void => {    const [[t1, r1], [t2, r2]] = [false, true].map((flag) =>      loop(exec, count, inputs.map((values) =>        [...values, flag]      ))    );
    console.error(`performance run for ${name} completed with ${formatNumber(count)} iterations.
${`${first}:`.padStart(PRE_PAD)} ${t1.toFixed(2).padStart(NUM_PAD)} ms ${t1 < t2 ? '(fastest)' : `(slowest, ${(t1 / t2).toFixed(2)}x)`}${formatOps(count, t1)}
${`${second}:`.padStart(PRE_PAD)} ${t2.toFixed(2).padStart(NUM_PAD)} ms ${t1 > t2 ? '(fastest)' : `(slowest, ${(t2 / t1).toFixed(2)}x)`}${formatOps(count, t2)}`);
    expect(      r1.filter((_, i) =>        JSON.stringify(r1[i]) !== JSON.stringify(r2[i])      )    ).toHaveLength(0);  });}