import type { ConstraintValidator } from '@/types'

export const maxNum: ConstraintValidator<number> =
  (num) =>
  async ({ pluginConfig, mode, type: moduleType }) => {
    const existedModuleTypes = (pluginConfig.modules || []).map((module) => module.moduleType)
    const targetModuleTypeNums = existedModuleTypes.filter((item) => moduleType === item).length
    const maxNum = mode === 'add' ? num : num + 1
    if (targetModuleTypeNums >= maxNum) {
      throw `A maximum of ${num} ${moduleType} ${num > 1 ? 'are' : 'is'} allowed in a plugin`
    }
  }