import {describe, expect, it} from 'vitest'
import {
  composeDateTime,
  formatIsoDateTimeToDisplay,
  isValidIsoDateTime,
  parseDisplayToIsoDateTime,
  splitDateTime,
} from './datetimeFormat'

describe('datetimeFormat', () => {
  describe('isValidIsoDateTime', () => {
    it('accepte un datetime ISO complet valide', () => {
      expect(isValidIsoDateTime('2026-05-20T14:30:00')).toBe(true)
      expect(isValidIsoDateTime('2026-01-01T00:00:00')).toBe(true)
      expect(isValidIsoDateTime('2026-12-31T23:59:59')).toBe(true)
    })

    it('rejette une date seule, des composants invalides ou une chaîne vide', () => {
      expect(isValidIsoDateTime('2026-05-20')).toBe(false)
      expect(isValidIsoDateTime('2026-13-01T00:00:00')).toBe(false)
      expect(isValidIsoDateTime('2026-05-20T24:00:00')).toBe(false)
      expect(isValidIsoDateTime('2026-05-20T14:60:00')).toBe(false)
      expect(isValidIsoDateTime('2026-05-20T14:30:60')).toBe(false)
      expect(isValidIsoDateTime('2026-05-20T14:30')).toBe(false)
      expect(isValidIsoDateTime('')).toBe(false)
    })
  })

  describe('formatIsoDateTimeToDisplay', () => {
    it('formate un datetime valide en JJ/MM/AAAA HH:MM', () => {
      expect(formatIsoDateTimeToDisplay('2026-05-20T14:30:00')).toBe('20/05/2026 14:30')
    })

    it('renvoie une chaîne vide pour nul ou invalide', () => {
      expect(formatIsoDateTimeToDisplay(null)).toBe('')
      expect(formatIsoDateTimeToDisplay('2026-05-20')).toBe('')
      expect(formatIsoDateTimeToDisplay('nope')).toBe('')
    })
  })

  describe('splitDateTime', () => {
    it('découpe un datetime valide', () => {
      expect(splitDateTime('2026-05-20T14:30:00')).toEqual({date: '2026-05-20', time: '14:30'})
    })

    it('renvoie date null et time vide pour nul, date seule ou invalide', () => {
      expect(splitDateTime(null)).toEqual({date: null, time: ''})
      expect(splitDateTime('2026-05-20')).toEqual({date: null, time: ''})
      expect(splitDateTime('nope')).toEqual({date: null, time: ''})
    })
  })

  describe('parseDisplayToIsoDateTime', () => {
    it('parse un JJ/MM/AAAA HH:MM valide en datetime ISO', () => {
      expect(parseDisplayToIsoDateTime('20/05/2026 14:30')).toBe('2026-05-20T14:30:00')
      expect(parseDisplayToIsoDateTime('01/01/2026 00:00')).toBe('2026-01-01T00:00:00')
      expect(parseDisplayToIsoDateTime('31/12/2026 23:59')).toBe('2026-12-31T23:59:00')
    })

    it('tolère les espaces autour', () => {
      expect(parseDisplayToIsoDateTime('  20/05/2026 14:30  ')).toBe('2026-05-20T14:30:00')
    })

    it('rejette une date malformée', () => {
      expect(parseDisplayToIsoDateTime('32/01/2026 10:00')).toBeNull()
      expect(parseDisplayToIsoDateTime('10/13/2026 10:00')).toBeNull()
    })

    it('rejette une heure hors bornes', () => {
      expect(parseDisplayToIsoDateTime('20/05/2026 24:00')).toBeNull()
      expect(parseDisplayToIsoDateTime('20/05/2026 12:60')).toBeNull()
    })

    it('rejette un format incomplet ou sans heure', () => {
      expect(parseDisplayToIsoDateTime('20/05/2026')).toBeNull()
      expect(parseDisplayToIsoDateTime('20/05/2026 14')).toBeNull()
      expect(parseDisplayToIsoDateTime('')).toBeNull()
    })
  })

  describe('composeDateTime', () => {
    it('recompose un datetime ISO avec secondes à 00', () => {
      expect(composeDateTime('2026-05-20', '14:30')).toBe('2026-05-20T14:30:00')
    })

    it('utilise 00:00 quand l\'heure est vide', () => {
      expect(composeDateTime('2026-05-20', '')).toBe('2026-05-20T00:00:00')
    })
  })
})