import * as Calculators from '../calculators'
import { BusinessExceptionError } from '../../../errors/business_exception.error'
import { CompetitionCategories } from '../../../models/ranking/competition/enums/categories.enum'

export class CalculatorFactory {
  static build(category: CompetitionCategories): Calculators.ScoreCalculator {
    switch (category) {
      case CompetitionCategories.DECREASE_BODY_FAT:
        return Calculators.DecreaseBodyFatCalculator
      case CompetitionCategories.DECREASE_VISCERAL_FAT:
        return Calculators.DecreaseVisceralFatCalculator
      case CompetitionCategories.INCREASE_LEAN_MASS:
        return Calculators.IncreaseLeanMassCalculator
      case CompetitionCategories.DECREASE_ACTUAL_WEIGHT:
        return Calculators.DecreaseActualWeightCalculator
      default:
        throw new BusinessExceptionError(`Unknown category ${category}`)
    }
  }
}