export class OneRepMaxCalculator {
  private readonly weight: number
  private readonly repetitions: number

  constructor(weight: number, repetitions: number) {
    this.weight = weight
    this.repetitions = repetitions
  }

  epley(): number {
    return Math.round(this.weight * (1 + this.repetitions / 30))
  }

  brzycki(): number {
    return Math.round(this.weight * (36 / (37 - this.repetitions)))
  }

  mcGlothin(): number {
    return Math.round((100 * this.weight) / (101.3 - 2.67123 * this.repetitions))
  }

  lombardi(): number {
    return Math.round(this.weight * Math.pow(this.repetitions, 0.1))
  }

  oConner(): number {
    return Math.round(this.weight * (1 + this.repetitions / 40))
  }
}