import { describe, expect, it } from 'vitest'
import { toJalaali } from 'jalaali-js'

import {
  constrainEventDatePickerValue,
  eventDatePickerValueToIso,
  getEventDatePickerValue,
  getEventTimePickerValue,
} from '@/components/events/schedule/EventScheduleFieldControl'

describe('EventScheduleFieldControl helpers', () => {
  it('keeps the hidden Jalaali year when changing day and month', () => {
    const previousValue = new Date(2026, 2, 21, 12).toISOString()
    const previousYear = toJalaali(new Date(previousValue)).jy
    const nextValue = eventDatePickerValueToIso({ day: '12', month: '8', year: String(previousYear) }, previousValue)

    expect(toJalaali(new Date(nextValue))).toEqual({ jy: previousYear, jm: 8, jd: 12 })
  })

  it('clamps an invalid day to the selected Jalaali month length', () => {
    const previousValue = new Date(2026, 2, 21, 12).toISOString()
    const previousYear = toJalaali(new Date(previousValue)).jy
    const nextValue = eventDatePickerValueToIso({ day: '31', month: '7', year: String(previousYear) }, previousValue)

    expect(getEventDatePickerValue(nextValue)).toEqual({ day: '30', month: '7', year: String(previousYear) })
  })

  it('moves an empty or past value to the minimum selectable date', () => {
    const minimum = new Date(2026, 6, 30, 12)
    const expected = getEventDatePickerValue(minimum.toISOString())

    expect(constrainEventDatePickerValue('', minimum.toISOString())).toEqual(expected)
    expect(constrainEventDatePickerValue(new Date(2026, 6, 29, 12).toISOString(), minimum.toISOString())).toEqual(expected)
  })

  it('normalizes event minutes to a valid wheel time', () => {
    expect(getEventTimePickerValue(1500)).toEqual({ hour: '23', minute: '59' })
    expect(getEventTimePickerValue(-10)).toEqual({ hour: '0', minute: '0' })
  })
})