export class BenchmarkSuite {
  constructor() {
    this.reset()
  }

  reset() {
    this.cases = []
    this.stats = {}
  }

  setBenchmarkType(benchmarktype) {
    this.benchmarktype = benchmarktype
  }

  setCases(cases) {
    this.stats = {}
    this.cases = cases
    for (let c of this.cases) {
      this.stats[c.name] = []
    }
  }

  onCycle(i, count, stats) {}

  async run() {
    let mean
    let i = 0
    const count = this.cases.length
    this.onCycle(i, count, this.stats)
    for (const benchCase of this.cases) {
      this.benchmarktype.setCase(benchCase)
      mean = await this.benchmarktype.run()
      this.stats[benchCase.name] = [...this.stats[benchCase.name], mean]
      i++
      this.onCycle(i, count, this.stats)
      await freeEventLoop()
    }
  }
}

/**
 * Promise that uses setTimeout to resolve.
 * This is a hack to free the eventloop from microtasks.
 * Without this rendering blocks during benchmarks.
 */
async function freeEventLoop() {
  return new Promise(resolve => setTimeout(resolve, 0))
}