import fs from "fs"

export { getProfiler }

const round = (x: number) => Math.round(x * 100) / 100

function getProfiler(name: string) {
  let times: Record<string, any> = {}
  let label: string

  return {
    get times() {
      return times
    },
    start(label_: string) {
      label = label_
      times = {
        ...times,
        [label]: {
          start: performance.now()
        }
      }
    },
    stop() {
      times[label].end = performance.now()
      return this
    },
    store() {
      let profilingData = `## Times for ${name}\n\n`
      profilingData += `| Name | time passed in s |\n|---|---|`
      let totalTimePassed = 0

      Object.keys(times).forEach((k) => {
        const timePassed = (times[k].end - times[k].start) / 1000
        totalTimePassed += timePassed

        profilingData += `\n|${k}|${round(timePassed)}|`
      })

      profilingData += `\n\nIn total, it took ${
        round(
          totalTimePassed
        )
      } seconds to run the entire benchmark\n\n\n`

      fs.appendFileSync("profiling.md", profilingData)
    }
  }
}