export const alphanumericKeys = /^[a-z0-9@.]$/i

export function cleanValue(value: string) {
   return value.replace(/\s+/g, '').toLowerCase()
}

export function getHonestValue(value: unknown, maxValue: number, defaultValue: number) {
   if (typeof value === 'number' && Number.isInteger(value) && value <= maxValue) {
      return value
   }
   return defaultValue
}

export function isFn(fn: unknown) {
   return typeof fn === 'function'
}

export function getEmailData(value: string, minChars: number) {
   const [username] = value.split('@')
   const breakpoint = value.indexOf('@')
   const domain = breakpoint >= 0 ? value.slice(breakpoint + 1) : '' // Domain is truthy only if typed @

   const hasUsername = username.length >= minChars
   const hasAt = hasUsername && value.includes('@')
   const hasDomain = hasUsername && domain.length >= 1

   return { username, domain, hasUsername, hasAt, hasDomain }
}

/**
 *
 *
 *
 *
 * getEmailData tests
 *
 *
 *
 *
 *
 */

if (import.meta.vitest) {
   const { it, expect, describe } = import.meta.vitest

   describe('Domain', () => {
      it('Should return domain', () => {
         const { domain } = getEmailData('username@gmail.com', 2)
         expect(domain).toBe('gmail.com')

         const { domain: domain2 } = getEmailData('username@g', 2)
         expect(domain2).toBe('g')
      })

      it('Should return domain even if more @', () => {
         const { domain } = getEmailData('username@ciao@', 2)
         expect(domain).toBe('ciao@')
      })

      it('Should return empty string if no domain', () => {
         const { domain } = getEmailData('username@', 2)
         expect(domain).toBe('')

         const { domain: domain2 } = getEmailData('username', 2)
         expect(domain2).toBe('')
      })
   })

   describe('hasDomain', () => {
      it('Should return true', () => {
         const { hasDomain } = getEmailData('username@gmail.com', 2)
         expect(hasDomain).toBe(true)
      })

      it('Should return false', () => {
         const { hasDomain } = getEmailData('username@', 2)
         expect(hasDomain).toBe(false)

         const { hasDomain: hasDomain2 } = getEmailData('username', 2)
         expect(hasDomain2).toBe(false)
      })
   })
}